Merge branch 'master' into bagatur/add_tool_call_metadata

- **Description:** The root cause of this issue is that when a user
defines `model_config` in a `BaseModel`, the `{"type": <tool_name>}`
value is derived from the title specified in `model_config` when the
results are parsed
[here](https://vscode.dev/github/keenborder786/langchain/blob/fix/tool_name_dict/libs/core/langchain_core/output_parsers/openai_tools.py#L199).
However,
[tool.__name__](https://vscode.dev/github/keenborder786/langchain/blob/fix/tool_name_dict/libs/core/langchain_core/output_parsers/openai_tools.py#L331)
uses the class name (in uppercase) of the `BaseModel`, resulting in a
`KeyError` when a custom title is provided in `model_config`.
 

The Best Solution will be to use the title provided in `model_config`
attribute if provided one since that is what `type` will be parsed to,
if not then use `tool.__name__`. But need to make sure that this works
only for Pydantic V2.

  - **Issue:** #27260

---------

Co-authored-by: Mason Daugherty <mason@langchain.dev>

.claude/settings.local.json

@@ -1,18 +0,0 @@
-{
-  "permissions": {
-    "allow": [
-      "Bash(uv run:*)",
-      "Bash(make:*)",
-      "WebSearch",
-      "WebFetch(domain:ai.pydantic.dev)",
-      "WebFetch(domain:openai.github.io)",
-      "Bash(uv run:*)",
-      "Bash(python3:*)",
-      "WebFetch(domain:github.com)",
-      "Bash(gh pr view:*)",
-      "Bash(gh pr diff:*)"
-    ],
-    "deny": [],
-    "ask": []
-  }
-}

.github/ISSUE_TEMPLATE/config.yml

@@ -2,7 +2,7 @@ blank_issues_enabled: false
 version: 2.1
 contact_links:
   - name: 📚 Documentation
-    url: https://github.com/langchain-ai/docs/issues/new?template=langchain.yml
+    url: https://github.com/langchain-ai/docs/issues/new?template=01-langchain.yml
     about: Report an issue related to the LangChain documentation
   - name: 💬 LangChain Forum
     url:  https://forum.langchain.com/

.github/actions/poetry_setup/action.yml

@@ -1,93 +0,0 @@
-# An action for setting up poetry install with caching.
-# Using a custom action since the default action does not
-# take poetry install groups into account.
-# Action code from:
-# https://github.com/actions/setup-python/issues/505#issuecomment-1273013236
-name: poetry-install-with-caching
-description: Poetry install with support for caching of dependency groups.
-
-inputs:
-  python-version:
-    description: Python version, supporting MAJOR.MINOR only
-    required: true
-
-  poetry-version:
-    description: Poetry version
-    required: true
-
-  cache-key:
-    description: Cache key to use for manual handling of caching
-    required: true
-
-  working-directory:
-    description: Directory whose poetry.lock file should be cached
-    required: true
-
-runs:
-  using: composite
-  steps:
-    - uses: actions/setup-python@v5
-      name: Setup python ${{ inputs.python-version }}
-      id: setup-python
-      with:
-        python-version: ${{ inputs.python-version }}
-
-    - uses: actions/cache@v4
-      id: cache-bin-poetry
-      name: Cache Poetry binary - Python ${{ inputs.python-version }}
-      env:
-        SEGMENT_DOWNLOAD_TIMEOUT_MIN: "1"
-      with:
-        path: |
-          /opt/pipx/venvs/poetry
-        # This step caches the poetry installation, so make sure it's keyed on the poetry version as well.
-        key: bin-poetry-${{ runner.os }}-${{ runner.arch }}-py-${{ inputs.python-version }}-${{ inputs.poetry-version }}
-
-    - name: Refresh shell hashtable and fixup softlinks
-      if: steps.cache-bin-poetry.outputs.cache-hit == 'true'
-      shell: bash
-      env:
-        POETRY_VERSION: ${{ inputs.poetry-version }}
-        PYTHON_VERSION: ${{ inputs.python-version }}
-      run: |
-        set -eux
-
-        # Refresh the shell hashtable, to ensure correct `which` output.
-        hash -r
-
-        # `actions/cache@v3` doesn't always seem able to correctly unpack softlinks.
-        # Delete and recreate the softlinks pipx expects to have.
-        rm /opt/pipx/venvs/poetry/bin/python
-        cd /opt/pipx/venvs/poetry/bin
-        ln -s "$(which "python$PYTHON_VERSION")" python
-        chmod +x python
-        cd /opt/pipx_bin/
-        ln -s /opt/pipx/venvs/poetry/bin/poetry poetry
-        chmod +x poetry
-
-        # Ensure everything got set up correctly.
-        /opt/pipx/venvs/poetry/bin/python --version
-        /opt/pipx_bin/poetry --version
-
-    - name: Install poetry
-      if: steps.cache-bin-poetry.outputs.cache-hit != 'true'
-      shell: bash
-      env:
-        POETRY_VERSION: ${{ inputs.poetry-version }}
-        PYTHON_VERSION: ${{ inputs.python-version }}
-      # Install poetry using the python version installed by setup-python step.
-      run: pipx install "poetry==$POETRY_VERSION" --python '${{ steps.setup-python.outputs.python-path }}' --verbose
-
-    - name: Restore pip and poetry cached dependencies
-      uses: actions/cache@v4
-      env:
-        SEGMENT_DOWNLOAD_TIMEOUT_MIN: "4"
-        WORKDIR: ${{ inputs.working-directory == '' && '.' || inputs.working-directory }}
-      with:
-        path: |
-          ~/.cache/pip
-          ~/.cache/pypoetry/virtualenvs
-          ~/.cache/pypoetry/cache
-          ~/.cache/pypoetry/artifacts
-          ${{ env.WORKDIR }}/.venv
-        key: py-deps-${{ runner.os }}-${{ runner.arch }}-py-${{ inputs.python-version }}-poetry-${{ inputs.poetry-version }}-${{ inputs.cache-key }}-${{ hashFiles(format('{0}/**/poetry.lock', env.WORKDIR)) }}

.github/pr-title-labeler.yml

@@ -1,41 +0,0 @@
-# PR title labeler config
-#
-# Labels PRs based on conventional commit patterns in titles
-#
-# Format: type(scope): description or type!: description (breaking)
-
-add-missing-labels: true
-clear-prexisting: false
-include-commits: false
-include-title: true
-label-for-breaking-changes: breaking
-
-label-mapping:
-  documentation: ["docs"]
-  feature: ["feat"]
-  fix: ["fix"]
-  infra: ["build", "ci", "chore"]
-  integration:
-    [
-      "anthropic",
-      "chroma",
-      "deepseek",
-      "exa",
-      "fireworks",
-      "groq",
-      "huggingface",
-      "mistralai",
-      "nomic",
-      "ollama",
-      "openai",
-      "perplexity",
-      "prompty",
-      "qdrant",
-      "xai",
-    ]
-  linting: ["style"]
-  performance: ["perf"]
-  refactor: ["refactor"]
-  release: ["release"]
-  revert: ["revert"]
-  tests: ["test"]

.github/scripts/check_diff.py

@@ -30,6 +30,7 @@ LANGCHAIN_DIRS = [
     "libs/text-splitters",
     "libs/langchain",
     "libs/langchain_v1",
+    "libs/model-profiles",
 ]
 
 # When set to True, we are ignoring core dependents
@@ -130,29 +131,20 @@ def _get_configs_for_single_dir(job: str, dir_: str) -> List[Dict[str, str]]:
         return _get_pydantic_test_configs(dir_)
 
     if job == "codspeed":
-        py_versions = ["3.12"]  # 3.13 is not yet supported
+        py_versions = ["3.13"]
     elif dir_ == "libs/core":
-        py_versions = ["3.10", "3.11", "3.12", "3.13"]
+        py_versions = ["3.10", "3.11", "3.12", "3.13", "3.14"]
     # custom logic for specific directories
-
-    elif dir_ == "libs/langchain" and job == "extended-tests":
+    elif dir_ in {"libs/partners/chroma"}:
         py_versions = ["3.10", "3.13"]
-    elif dir_ == "libs/langchain_v1":
-        py_versions = ["3.10", "3.13"]
-    elif dir_ in {"libs/cli"}:
-        py_versions = ["3.10", "3.13"]
-
-    elif dir_ == ".":
-        # unable to install with 3.13 because tokenizers doesn't support 3.13 yet
-        py_versions = ["3.10", "3.12"]
     else:
-        py_versions = ["3.10", "3.13"]
+        py_versions = ["3.10", "3.14"]
 
     return [{"working-directory": dir_, "python-version": py_v} for py_v in py_versions]
 
 
 def _get_pydantic_test_configs(
-    dir_: str, *, python_version: str = "3.11"
+    dir_: str, *, python_version: str = "3.12"
 ) -> List[Dict[str, str]]:
     with open("./libs/core/uv.lock", "rb") as f:
         core_uv_lock_data = tomllib.load(f)
@@ -306,7 +298,9 @@ if __name__ == "__main__":
                 if not filename.startswith(".")
             ] != ["README.md"]:
                 dirs_to_run["test"].add(f"libs/partners/{partner_dir}")
-                dirs_to_run["codspeed"].add(f"libs/partners/{partner_dir}")
+                # Skip codspeed for partners without benchmarks or in IGNORED_PARTNERS
+                if partner_dir not in IGNORED_PARTNERS:
+                    dirs_to_run["codspeed"].add(f"libs/partners/{partner_dir}")
             # Skip if the directory was deleted or is just a tombstone readme
         elif file.startswith("libs/"):
             # Check if this is a root-level file in libs/ (e.g., libs/README.md)

.github/scripts/get_min_versions.py

@@ -2,7 +2,6 @@
 
 import sys
 from collections import defaultdict
-from typing import Optional
 
 if sys.version_info >= (3, 11):
     import tomllib
@@ -54,7 +53,7 @@ def get_pypi_versions(package_name: str) -> List[str]:
     return list(response.json()["releases"].keys())
 
 
-def get_minimum_version(package_name: str, spec_string: str) -> Optional[str]:
+def get_minimum_version(package_name: str, spec_string: str) -> str | None:
     """Find the minimum published version that satisfies the given constraints.
 
     Args:
@@ -114,7 +113,7 @@ def get_min_version_from_toml(
     versions_for: str,
     python_version: str,
     *,
-    include: Optional[list] = None,
+    include: list | None = None,
 ):
     # Parse the TOML file
     with open(toml_path, "rb") as file:

.github/workflows/_release.yml

@@ -77,7 +77,7 @@ jobs:
         working-directory: ${{ inputs.working-directory }}
 
       - name: Upload build
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         with:
           name: dist
           path: ${{ inputs.working-directory }}/dist/
@@ -149,8 +149,8 @@ jobs:
             fi
           fi
 
-          # if PREV_TAG is empty, let it be empty
-          if [ -z "$PREV_TAG" ]; then
+          # if PREV_TAG is empty or came out to 0.0.0, let it be empty
+          if [ -z "$PREV_TAG" ] || [ "$PREV_TAG" = "$PKG_NAME==0.0.0" ]; then
             echo "No previous tag found - first release"
           else
             # confirm prev-tag actually exists in git repo with git tag
@@ -179,8 +179,8 @@ jobs:
           PREV_TAG: ${{ steps.check-tags.outputs.prev-tag }}
         run: |
           PREAMBLE="Changes since $PREV_TAG"
-          # if PREV_TAG is empty, then we are releasing the first version
-          if [ -z "$PREV_TAG" ]; then
+          # if PREV_TAG is empty or 0.0.0, then we are releasing the first version
+          if [ -z "$PREV_TAG" ] || [ "$PREV_TAG" = "$PKG_NAME==0.0.0" ]; then
             PREAMBLE="Initial release"
             PREV_TAG=$(git rev-list --max-parents=0 HEAD)
           fi
@@ -208,7 +208,7 @@ jobs:
     steps:
       - uses: actions/checkout@v5
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: dist
           path: ${{ inputs.working-directory }}/dist/
@@ -258,7 +258,7 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: dist
           path: ${{ inputs.working-directory }}/dist/
@@ -377,6 +377,7 @@ jobs:
           XAI_API_KEY: ${{ secrets.XAI_API_KEY }}
           DEEPSEEK_API_KEY: ${{ secrets.DEEPSEEK_API_KEY }}
           PPLX_API_KEY: ${{ secrets.PPLX_API_KEY }}
+          LANGCHAIN_TESTS_USER_AGENT: ${{ secrets.LANGCHAIN_TESTS_USER_AGENT }}
         run: make integration_tests
         working-directory: ${{ inputs.working-directory }}
 
@@ -395,7 +396,7 @@ jobs:
       contents: read
     strategy:
       matrix:
-        partner: [openai, anthropic]
+        partner: [openai]
       fail-fast: false # Continue testing other partners if one fails
     env:
       ANTHROPIC_API_KEY: ${{ secrets.ANTHROPIC_API_KEY }}
@@ -409,6 +410,7 @@ jobs:
       AZURE_OPENAI_LEGACY_CHAT_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_LEGACY_CHAT_DEPLOYMENT_NAME }}
       AZURE_OPENAI_LLM_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_LLM_DEPLOYMENT_NAME }}
       AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT_NAME: ${{ secrets.AZURE_OPENAI_EMBEDDINGS_DEPLOYMENT_NAME }}
+      LANGCHAIN_TESTS_USER_AGENT: ${{ secrets.LANGCHAIN_TESTS_USER_AGENT }}
     steps:
       - uses: actions/checkout@v5
 
@@ -428,7 +430,7 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         if: startsWith(inputs.working-directory, 'libs/core')
         with:
           name: dist
@@ -442,7 +444,7 @@ jobs:
             git ls-remote --tags origin "langchain-${{ matrix.partner }}*" \
             | awk '{print $2}' \
             | sed 's|refs/tags/||' \
-            | grep -E '[0-9]+\.[0-9]+\.[0-9]+([a-zA-Z]+[0-9]+)?$' \
+            | grep -E '[0-9]+\.[0-9]+\.[0-9]+$' \
             | sort -Vr \
             | head -n 1
           )"
@@ -497,7 +499,7 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: dist
           path: ${{ inputs.working-directory }}/dist/
@@ -537,7 +539,7 @@ jobs:
         with:
           python-version: ${{ env.PYTHON_VERSION }}
 
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: dist
           path: ${{ inputs.working-directory }}/dist/

.github/workflows/_test_pydantic.yml

@@ -13,7 +13,7 @@ on:
         required: false
         type: string
         description: "Python version to use"
-        default: "3.11"
+        default: "3.12"
       pydantic-version:
         required: true
         type: string
@@ -51,7 +51,9 @@ jobs:
 
       - name: "🔄 Install Specific Pydantic Version"
         shell: bash
-        run: VIRTUAL_ENV=.venv uv pip install pydantic~=${{ inputs.pydantic-version }}
+        env:
+          PYDANTIC_VERSION: ${{ inputs.pydantic-version }}
+        run: VIRTUAL_ENV=.venv uv pip install "pydantic~=$PYDANTIC_VERSION"
 
       - name: "🧪 Run Core Tests"
         shell: bash

.github/workflows/check_diffs.yml

@@ -184,15 +184,14 @@ jobs:
     steps:
       - uses: actions/checkout@v5
 
-      # We have to use 3.12 as 3.13 is not yet supported
       - name: "📦 Install UV Package Manager"
-        uses: astral-sh/setup-uv@v6
+        uses: astral-sh/setup-uv@v7
         with:
-          python-version: "3.12"
+          python-version: "3.13"
 
       - uses: actions/setup-python@v6
         with:
-          python-version: "3.12"
+          python-version: "3.13"
 
       - name: "📦 Install Test Dependencies"
         run: uv sync --group test

.github/workflows/integration_tests.yml

@@ -23,10 +23,8 @@ permissions:
   contents: read
 
 env:
-  POETRY_VERSION: "1.8.4"
   UV_FROZEN: "true"
   DEFAULT_LIBS: '["libs/partners/openai", "libs/partners/anthropic", "libs/partners/fireworks", "libs/partners/groq", "libs/partners/mistralai", "libs/partners/xai", "libs/partners/google-vertexai", "libs/partners/google-genai", "libs/partners/aws"]'
-  POETRY_LIBS: ("libs/partners/aws")
 
 jobs:
   # Generate dynamic test matrix based on input parameters or defaults
@@ -60,7 +58,6 @@ jobs:
           echo $matrix
           echo "matrix=$matrix" >> $GITHUB_OUTPUT
   # Run integration tests against partner libraries with live API credentials
-  # Tests are run with Poetry or UV depending on the library's setup
   build:
     if: github.repository_owner == 'langchain-ai' || github.event_name != 'schedule'
     name: "🐍 Python ${{ matrix.python-version }}: ${{ matrix.working-directory }}"
@@ -95,17 +92,7 @@ jobs:
           mv langchain-google/libs/vertexai langchain/libs/partners/google-vertexai
           mv langchain-aws/libs/aws langchain/libs/partners/aws
 
-      - name: "🐍 Set up Python ${{ matrix.python-version }} + Poetry"
-        if: contains(env.POETRY_LIBS, matrix.working-directory)
-        uses: "./langchain/.github/actions/poetry_setup"
-        with:
-          python-version: ${{ matrix.python-version }}
-          poetry-version: ${{ env.POETRY_VERSION }}
-          working-directory: langchain/${{ matrix.working-directory }}
-          cache-key: scheduled
-
       - name: "🐍 Set up Python ${{ matrix.python-version }} + UV"
-        if: "!contains(env.POETRY_LIBS, matrix.working-directory)"
         uses: "./langchain/.github/actions/uv_setup"
         with:
           python-version: ${{ matrix.python-version }}
@@ -123,15 +110,7 @@ jobs:
           aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
           aws-region: ${{ secrets.AWS_REGION }}
 
-      - name: "📦 Install Dependencies (Poetry)"
-        if: contains(env.POETRY_LIBS, matrix.working-directory)
-        run: |
-          echo "Running scheduled tests, installing dependencies with poetry..."
-          cd langchain/${{ matrix.working-directory }}
-          poetry install --with=test_integration,test
-
-      - name: "📦 Install Dependencies (UV)"
-        if: "!contains(env.POETRY_LIBS, matrix.working-directory)"
+      - name: "📦 Install Dependencies"
         run: |
           echo "Running scheduled tests, installing dependencies with uv..."
           cd langchain/${{ matrix.working-directory }}
@@ -176,6 +155,7 @@ jobs:
           WATSONX_APIKEY: ${{ secrets.WATSONX_APIKEY }}
           WATSONX_PROJECT_ID: ${{ secrets.WATSONX_PROJECT_ID }}
           XAI_API_KEY: ${{ secrets.XAI_API_KEY }}
+          LANGCHAIN_TESTS_USER_AGENT: ${{ secrets.LANGCHAIN_TESTS_USER_AGENT }}
         run: |
           cd langchain/${{ matrix.working-directory }}
           make integration_tests

.github/workflows/pr_lint.yml

@@ -27,10 +27,10 @@
 #   * release    — prepare a new release
 #
 # Allowed Scopes (optional):
-#   core, cli, langchain, langchain_v1, langchain_legacy, standard-tests,
+#   core, cli, langchain, langchain_v1, langchain-classic, standard-tests,
 #   text-splitters, docs, anthropic, chroma, deepseek, exa, fireworks, groq,
 #   huggingface, mistralai, nomic, ollama, openai, perplexity, prompty, qdrant,
-#   xai, infra
+#   xai, infra, deps
 #
 # Rules:
 #   1. The 'Type' must start with a lowercase letter.
@@ -79,8 +79,8 @@ jobs:
             core
             cli
             langchain
-            langchain_v1
-            langchain_legacy
+            langchain_classic
+            model-profiles
             standard-tests
             text-splitters
             docs

.gitignore

@@ -1,6 +1,8 @@
 .vs/
 .claude/
 .idea/
+#Emacs backup
+*~
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]

.mcp.json

@@ -0,0 +1,8 @@
+{
+  "mcpServers": {
+    "docs-langchain": {
+      "type": "http",
+      "url": "https://docs.langchain.com/mcp"
+    }
+  }
+}

AGENTS.md

@@ -149,23 +149,25 @@ def send_email(to: str, msg: str, *, priority: str = "normal") -> bool:
     Args:
         to: The email address of the recipient.
         msg: The message body to send.
-        priority: Email priority level (``'low'``, ``'normal'``, ``'high'``).
+        priority: Email priority level (`'low'`, `'normal'`, `'high'`).
 
     Returns:
-        True if email was sent successfully, False otherwise.
+        `True` if email was sent successfully, `False` otherwise.
 
     Raises:
-        InvalidEmailError: If the email address format is invalid.
-        SMTPConnectionError: If unable to connect to email server.
+        `InvalidEmailError`: If the email address format is invalid.
+        `SMTPConnectionError`: If unable to connect to email server.
     """
 ```
 
 **Documentation Guidelines:**
 
 - Types go in function signatures, NOT in docstrings
+  - If a default is present, DO NOT repeat it in the docstring unless there is post-processing or it is set conditionally.
 - Focus on "why" rather than "what" in descriptions
 - Document all parameters, return values, and exceptions
 - Keep descriptions concise but clear
+- Ensure American English spelling (e.g., "behavior", not "behaviour")
 
 📌 *Tip:* Keep descriptions concise but clear. Only document return values if non-obvious.
 

CLAUDE.md

@@ -149,23 +149,25 @@ def send_email(to: str, msg: str, *, priority: str = "normal") -> bool:
     Args:
         to: The email address of the recipient.
         msg: The message body to send.
-        priority: Email priority level (``'low'``, ``'normal'``, ``'high'``).
+        priority: Email priority level (`'low'`, `'normal'`, `'high'`).
 
     Returns:
-        True if email was sent successfully, False otherwise.
+        `True` if email was sent successfully, `False` otherwise.
 
     Raises:
-        InvalidEmailError: If the email address format is invalid.
-        SMTPConnectionError: If unable to connect to email server.
+        `InvalidEmailError`: If the email address format is invalid.
+        `SMTPConnectionError`: If unable to connect to email server.
     """
 ```
 
 **Documentation Guidelines:**
 
 - Types go in function signatures, NOT in docstrings
+  - If a default is present, DO NOT repeat it in the docstring unless there is post-processing or it is set conditionally.
 - Focus on "why" rather than "what" in descriptions
 - Document all parameters, return values, and exceptions
 - Keep descriptions concise but clear
+- Ensure American English spelling (e.g., "behavior", not "behaviour")
 
 📌 *Tip:* Keep descriptions concise but clear. Only document return values if non-obvious.
 

MIGRATE.md

@@ -2,10 +2,8 @@
 
 Please see the following guides for migrating LangChain code:
 
+* Migrate to [LangChain v1.0](https://docs.langchain.com/oss/python/migrate/langchain-v1)
 * Migrate to [LangChain v0.3](https://python.langchain.com/docs/versions/v0_3/)
 * Migrate to [LangChain v0.2](https://python.langchain.com/docs/versions/v0_2/)
 * Migrating from [LangChain 0.0.x Chains](https://python.langchain.com/docs/versions/migrating_chains/)
 * Upgrade to [LangGraph Memory](https://python.langchain.com/docs/versions/migrating_memory/)
-
-The [LangChain CLI](https://python.langchain.com/docs/versions/v0_3/#migrate-using-langchain-cli) can help you automatically upgrade your code to use non-deprecated imports.
-This will be especially helpful if you're still on either version 0.0.x or 0.1.x of LangChain.

README.md

@@ -12,13 +12,16 @@
 
 <p align="center">
   <a href="https://opensource.org/licenses/MIT" target="_blank">
-      <img src="https://img.shields.io/pypi/l/langchain-core?style=flat-square" alt="PyPI - License">
+      <img src="https://img.shields.io/pypi/l/langchain" alt="PyPI - License">
   </a>
-  <a href="https://pypistats.org/packages/langchain-core" target="_blank">
+  <a href="https://pypistats.org/packages/langchain" target="_blank">
       <img src="https://img.shields.io/pepy/dt/langchain" alt="PyPI - Downloads">
   </a>
+  <a href="https://pypi.org/project/langchain/#history" target="_blank">
+      <img src="https://img.shields.io/pypi/v/langchain?label=%20" alt="Version">
+  </a>
   <a href="https://vscode.dev/redirect?url=vscode://ms-vscode-remote.remote-containers/cloneInVolume?url=https://github.com/langchain-ai/langchain" target="_blank">
-      <img src="https://img.shields.io/static/v1?label=Dev%20Containers&message=Open&color=blue&logo=visualstudiocode&style=flat-square" alt="Open in Dev Containers">
+      <img src="https://img.shields.io/static/v1?label=Dev%20Containers&message=Open&color=blue&logo=visualstudiocode" alt="Open in Dev Containers">
   </a>
   <a href="https://codespaces.new/langchain-ai/langchain" target="_blank">
       <img src="https://github.com/codespaces/badge.svg" alt="Open in Github Codespace" title="Open in Github Codespace" width="150" height="20">
@@ -31,17 +34,22 @@
   </a>
 </p>
 
-LangChain is a framework for building LLM-powered applications. It helps you chain together interoperable components and third-party integrations to simplify AI application development —  all while future-proofing decisions as the underlying technology evolves.
+LangChain is a framework for building agents and LLM-powered applications. It helps you chain together interoperable components and third-party integrations to simplify AI application development – all while future-proofing decisions as the underlying technology evolves.
 
 ```bash
-pip install -U langchain
+pip install langchain
 ```
 
+If you're looking for more advanced customization or agent orchestration, check out [LangGraph](https://docs.langchain.com/oss/python/langgraph/overview), our framework for building controllable agent workflows.
+
 ---
 
-**Documentation**: To learn more about LangChain, check out [the docs](https://docs.langchain.com/).
+**Documentation**:
 
-If you're looking for more advanced customization or agent orchestration, check out [LangGraph](https://langchain-ai.github.io/langgraph/), our framework for building controllable agent workflows.
+- [docs.langchain.com](https://docs.langchain.com/oss/python/langchain/overview) – Comprehensive documentation, including conceptual overviews and guides
+- [reference.langchain.com/python](https://reference.langchain.com/python) – API reference docs for LangChain packages
+
+**Discussions**: Visit the [LangChain Forum](https://forum.langchain.com) to connect with the community and share all of your technical questions, ideas, and feedback.
 
 > [!NOTE]
 > Looking for the JS/TS library? Check out [LangChain.js](https://github.com/langchain-ai/langchainjs).
@@ -52,26 +60,27 @@ LangChain helps developers build applications powered by LLMs through a standard
 
 Use LangChain for:
 
-- **Real-time data augmentation**. Easily connect LLMs to diverse data sources and external/internal systems, drawing from LangChain’s vast library of integrations with model providers, tools, vector stores, retrievers, and more.
-- **Model interoperability**. Swap models in and out as your engineering team experiments to find the best choice for your application’s needs. As the industry frontier evolves, adapt quickly — LangChain’s abstractions keep you moving without losing momentum.
+- **Real-time data augmentation**. Easily connect LLMs to diverse data sources and external/internal systems, drawing from LangChain's vast library of integrations with model providers, tools, vector stores, retrievers, and more.
+- **Model interoperability**. Swap models in and out as your engineering team experiments to find the best choice for your application's needs. As the industry frontier evolves, adapt quickly – LangChain's abstractions keep you moving without losing momentum.
+- **Rapid prototyping**. Quickly build and iterate on LLM applications with LangChain's modular, component-based architecture. Test different approaches and workflows without rebuilding from scratch, accelerating your development cycle.
+- **Production-ready features**. Deploy reliable applications with built-in support for monitoring, evaluation, and debugging through integrations like LangSmith. Scale with confidence using battle-tested patterns and best practices.
+- **Vibrant community and ecosystem**. Leverage a rich ecosystem of integrations, templates, and community-contributed components. Benefit from continuous improvements and stay up-to-date with the latest AI developments through an active open-source community.
+- **Flexible abstraction layers**. Work at the level of abstraction that suits your needs - from high-level chains for quick starts to low-level components for fine-grained control. LangChain grows with your application's complexity.
 
-## LangChain’s ecosystem
+## LangChain ecosystem
 
 While the LangChain framework can be used standalone, it also integrates seamlessly with any LangChain product, giving developers a full suite of tools when building LLM applications.
 
 To improve your LLM application development, pair LangChain with:
 
-- [LangSmith](https://www.langchain.com/langsmith) - Helpful for agent evals and observability. Debug poor-performing LLM app runs, evaluate agent trajectories, gain visibility in production, and improve performance over time.
-- [LangGraph](https://langchain-ai.github.io/langgraph/) - Build agents that can reliably handle complex tasks with LangGraph, our low-level agent orchestration framework. LangGraph offers customizable architecture, long-term memory, and human-in-the-loop workflows — and is trusted in production by companies like LinkedIn, Uber, Klarna, and GitLab.
-- [LangGraph Platform](https://docs.langchain.com/langgraph-platform) - Deploy and scale agents effortlessly with a purpose-built deployment platform for long-running, stateful workflows. Discover, reuse, configure, and share agents across teams — and iterate quickly with visual prototyping in [LangGraph Studio](https://langchain-ai.github.io/langgraph/concepts/langgraph_studio/).
+- [LangGraph](https://docs.langchain.com/oss/python/langgraph/overview) – Build agents that can reliably handle complex tasks with LangGraph, our low-level agent orchestration framework. LangGraph offers customizable architecture, long-term memory, and human-in-the-loop workflows – and is trusted in production by companies like LinkedIn, Uber, Klarna, and GitLab.
+- [Integrations](https://docs.langchain.com/oss/python/integrations/providers/overview) – List of LangChain integrations, including chat & embedding models, tools & toolkits, and more
+- [LangSmith](https://www.langchain.com/langsmith) – Helpful for agent evals and observability. Debug poor-performing LLM app runs, evaluate agent trajectories, gain visibility in production, and improve performance over time.
+- [LangSmith Deployment](https://docs.langchain.com/langsmith/deployments) – Deploy and scale agents effortlessly with a purpose-built deployment platform for long-running, stateful workflows. Discover, reuse, configure, and share agents across teams – and iterate quickly with visual prototyping in [LangSmith Studio](https://docs.langchain.com/langsmith/studio).
+- [Deep Agents](https://github.com/langchain-ai/deepagents) *(new!)* – Build agents that can plan, use subagents, and leverage file systems for complex tasks
 
 ## Additional resources
 
-- [Conceptual Guides](https://docs.langchain.com/oss/python/langchain/overview): Explanations of key
-concepts behind the LangChain framework.
-- [Tutorials](https://docs.langchain.com/oss/python/learn): Simple walkthroughs with
-guided examples on getting started with LangChain.
-- [API Reference](https://reference.langchain.com/python/): Detailed reference on
-navigating base packages and integrations for LangChain.
-- [LangChain Forum](https://forum.langchain.com/): Connect with the community and share all of your technical questions, ideas, and feedback.
-- [Chat LangChain](https://chat.langchain.com/): Ask questions & chat with our documentation.
+- [API Reference](https://reference.langchain.com/python) – Detailed reference on navigating base packages and integrations for LangChain.
+- [Contributing Guide](https://docs.langchain.com/oss/python/contributing/overview) – Learn how to contribute to LangChain projects and find good first issues.
+- [Code of Conduct](https://github.com/langchain-ai/langchain/blob/master/.github/CODE_OF_CONDUCT.md) – Our community guidelines and standards for participation.

SECURITY.md

@@ -55,10 +55,10 @@ All out of scope targets defined by huntr as well as:
 * **langchain-experimental**: This repository is for experimental code and is not
   eligible for bug bounties (see [package warning](https://pypi.org/project/langchain-experimental/)), bug reports to it will be marked as interesting or waste of
   time and published with no bounty attached.
-* **tools**: Tools in either langchain or langchain-community are not eligible for bug
+* **tools**: Tools in either `langchain` or `langchain-community` are not eligible for bug
   bounties. This includes the following directories
-  * libs/langchain/langchain/tools
-  * libs/community/langchain_community/tools
+  * `libs/langchain/langchain/tools`
+  * `libs/community/langchain_community/tools`
   * Please review the [Best Practices](#best-practices)
     for more details, but generally tools interact with the real world. Developers are
     expected to understand the security implications of their code and are responsible

libs/cli/README.md

@@ -1,6 +1,30 @@
 # langchain-cli
 
-This package implements the official CLI for LangChain. Right now, it is most useful
-for getting started with LangChain Templates!
+[![PyPI - Version](https://img.shields.io/pypi/v/langchain-cli?label=%20)](https://pypi.org/project/langchain-cli/#history)
+[![PyPI - License](https://img.shields.io/pypi/l/langchain-cli)](https://opensource.org/licenses/MIT)
+[![PyPI - Downloads](https://img.shields.io/pepy/dt/langchain-cli)](https://pypistats.org/packages/langchain-cli)
+[![Twitter](https://img.shields.io/twitter/url/https/twitter.com/langchainai.svg?style=social&label=Follow%20%40LangChainAI)](https://twitter.com/langchainai)
+
+## Quick Install
+
+```bash
+pip install langchain-cli
+```
+
+## 🤔 What is this?
+
+This package implements the official CLI for LangChain. Right now, it is most useful for getting started with LangChain Templates!
+
+## 📖 Documentation
 
 [CLI Docs](https://github.com/langchain-ai/langchain/blob/master/libs/cli/DOCS.md)
+
+## 📕 Releases & Versioning
+
+See our [Releases](https://docs.langchain.com/oss/python/release-policy) and [Versioning](https://docs.langchain.com/oss/python/versioning) policies.
+
+## 💁 Contributing
+
+As an open-source project in a rapidly developing field, we are extremely open to contributions, whether it be in the form of a new feature, improved infrastructure, or better documentation.
+
+For detailed information on how to contribute, see the [Contributing Guide](https://docs.langchain.com/oss/python/contributing/overview).

libs/cli/langchain_cli/integration_template/README.md

@@ -19,8 +19,8 @@ And you should configure credentials by setting the following environment variab
 ```python
 from __module_name__ import Chat__ModuleName__
 
-llm = Chat__ModuleName__()
-llm.invoke("Sing a ballad of LangChain.")
+model = Chat__ModuleName__()
+model.invoke("Sing a ballad of LangChain.")
 ```
 
 ## Embeddings
@@ -41,6 +41,6 @@ embeddings.embed_query("What is the meaning of life?")
 ```python
 from __module_name__ import __ModuleName__LLM
 
-llm = __ModuleName__LLM()
-llm.invoke("The meaning of life is")
+model = __ModuleName__LLM()
+model.invoke("The meaning of life is")
 ```

libs/cli/langchain_cli/integration_template/docs/chat.ipynb

@@ -1,262 +1,264 @@
 {
- "cells": [
-  {
-   "cell_type": "raw",
-   "id": "afaf8039",
-   "metadata": {},
-   "source": [
-    "---\n",
-    "sidebar_label: __ModuleName__\n",
-    "---"
-   ]
+  "cells": [
+    {
+      "cell_type": "raw",
+      "id": "afaf8039",
+      "metadata": {},
+      "source": [
+        "---\n",
+        "sidebar_label: __ModuleName__\n",
+        "---"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "e49f1e0d",
+      "metadata": {},
+      "source": [
+        "# Chat__ModuleName__\n",
+        "\n",
+        "- TODO: Make sure API reference link is correct.\n",
+        "\n",
+        "This will help you get started with __ModuleName__ [chat models](/docs/concepts/chat_models). For detailed documentation of all Chat__ModuleName__ features and configurations head to the [API reference](https://python.langchain.com/api_reference/__package_name_short_snake__/chat_models/__module_name__.chat_models.Chat__ModuleName__.html).\n",
+        "\n",
+        "- TODO: Add any other relevant links, like information about models, prices, context windows, etc. See https://python.langchain.com/docs/integrations/chat/openai/ for an example.\n",
+        "\n",
+        "## Overview\n",
+        "### Integration details\n",
+        "\n",
+        "- TODO: Fill in table features.\n",
+        "- TODO: Remove JS support link if not relevant, otherwise ensure link is correct.\n",
+        "- TODO: Make sure API reference links are correct.\n",
+        "\n",
+        "| Class | Package | Local | Serializable | [JS support](https://js.langchain.com/docs/integrations/chat/__package_name_short_snake__) | Package downloads | Package latest |\n",
+        "| :--- | :--- | :---: | :---: |  :---: | :---: | :---: |\n",
+        "| [Chat__ModuleName__](https://python.langchain.com/api_reference/__package_name_short_snake__/chat_models/__module_name__.chat_models.Chat__ModuleName__.html) | [__package_name__](https://python.langchain.com/api_reference/__package_name_short_snake__/) | ✅/❌ | beta/❌ | ✅/❌ | ![PyPI - Downloads](https://img.shields.io/pypi/dm/__package_name__&label=%20) | ![PyPI - Version](https://img.shields.io/pypi/v/__package_name__&label=%20) |\n",
+        "\n",
+        "### Model features\n",
+        "| [Tool calling](/docs/how_to/tool_calling) | [Structured output](/docs/how_to/structured_output/) | JSON mode | [Image input](/docs/how_to/multimodal_inputs/) | Audio input | Video input | [Token-level streaming](/docs/how_to/chat_streaming/) | Native async | [Token usage](/docs/how_to/chat_token_usage_tracking/) | [Logprobs](/docs/how_to/logprobs/) |\n",
+        "| :---: | :---: | :---: | :---: |  :---: | :---: | :---: | :---: | :---: | :---: |\n",
+        "| ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ |\n",
+        "\n",
+        "## Setup\n",
+        "\n",
+        "- TODO: Update with relevant info.\n",
+        "\n",
+        "To access __ModuleName__ models you'll need to create a/an __ModuleName__ account, get an API key, and install the `__package_name__` integration package.\n",
+        "\n",
+        "### Credentials\n",
+        "\n",
+        "- TODO: Update with relevant info.\n",
+        "\n",
+        "Head to (TODO: link) to sign up to __ModuleName__ and generate an API key. Once you've done this set the __MODULE_NAME___API_KEY environment variable:"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "433e8d2b-9519-4b49-b2c4-7ab65b046c94",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "import getpass\n",
+        "import os\n",
+        "\n",
+        "if not os.getenv(\"__MODULE_NAME___API_KEY\"):\n",
+        "    os.environ[\"__MODULE_NAME___API_KEY\"] = getpass.getpass(\n",
+        "        \"Enter your __ModuleName__ API key: \"\n",
+        "    )"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "72ee0c4b-9764-423a-9dbf-95129e185210",
+      "metadata": {},
+      "source": [
+        "To enable automated tracing of your model calls, set your [LangSmith](https://docs.smith.langchain.com/) API key:"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "a15d341e-3e26-4ca3-830b-5aab30ed66de",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "# os.environ[\"LANGSMITH_TRACING\"] = \"true\"\n",
+        "# os.environ[\"LANGSMITH_API_KEY\"] = getpass.getpass(\"Enter your LangSmith API key: \")"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "0730d6a1-c893-4840-9817-5e5251676d5d",
+      "metadata": {},
+      "source": [
+        "### Installation\n",
+        "\n",
+        "The LangChain __ModuleName__ integration lives in the `__package_name__` package:"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "652d6238-1f87-422a-b135-f5abbb8652fc",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "%pip install -qU __package_name__"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "a38cde65-254d-4219-a441-068766c0d4b5",
+      "metadata": {},
+      "source": [
+        "## Instantiation\n",
+        "\n",
+        "Now we can instantiate our model object and generate chat completions:\n",
+        "\n",
+        "- TODO: Update model instantiation with relevant params."
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "cb09c344-1836-4e0c-acf8-11d13ac1dbae",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "from __module_name__ import Chat__ModuleName__\n",
+        "\n",
+        "model = Chat__ModuleName__(\n",
+        "    model=\"model-name\",\n",
+        "    temperature=0,\n",
+        "    max_tokens=None,\n",
+        "    timeout=None,\n",
+        "    max_retries=2,\n",
+        "    # other params...\n",
+        ")"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "2b4f3e15",
+      "metadata": {},
+      "source": [
+        "## Invocation\n",
+        "\n",
+        "- TODO: Run cells so output can be seen."
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "62e0dbc3",
+      "metadata": {
+        "tags": []
+      },
+      "outputs": [],
+      "source": [
+        "messages = [\n",
+        "    (\n",
+        "        \"system\",\n",
+        "        \"You are a helpful assistant that translates English to French. Translate the user sentence.\",\n",
+        "    ),\n",
+        "    (\"human\", \"I love programming.\"),\n",
+        "]\n",
+        "ai_msg = model.invoke(messages)\n",
+        "ai_msg"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "d86145b3-bfef-46e8-b227-4dda5c9c2705",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "print(ai_msg.content)"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "18e2bfc0-7e78-4528-a73f-499ac150dca8",
+      "metadata": {},
+      "source": [
+        "## Chaining\n",
+        "\n",
+        "We can [chain](/docs/how_to/sequence/) our model with a prompt template like so:\n",
+        "\n",
+        "- TODO: Run cells so output can be seen."
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "e197d1d7-a070-4c96-9f8a-a0e86d046e0b",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "from langchain_core.prompts import ChatPromptTemplate\n",
+        "\n",
+        "prompt = ChatPromptTemplate(\n",
+        "    [\n",
+        "        (\n",
+        "            \"system\",\n",
+        "            \"You are a helpful assistant that translates {input_language} to {output_language}.\",\n",
+        "        ),\n",
+        "        (\"human\", \"{input}\"),\n",
+        "    ]\n",
+        ")\n",
+        "\n",
+        "chain = prompt | model\n",
+        "chain.invoke(\n",
+        "    {\n",
+        "        \"input_language\": \"English\",\n",
+        "        \"output_language\": \"German\",\n",
+        "        \"input\": \"I love programming.\",\n",
+        "    }\n",
+        ")"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "d1ee55bc-ffc8-4cfa-801c-993953a08cfd",
+      "metadata": {},
+      "source": [
+        "## TODO: Any functionality specific to this model provider\n",
+        "\n",
+        "E.g. creating/using finetuned models via this provider. Delete if not relevant."
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "3a5bb5ca-c3ae-4a58-be67-2cd18574b9a3",
+      "metadata": {},
+      "source": [
+        "## API reference\n",
+        "\n",
+        "For detailed documentation of all Chat__ModuleName__ features and configurations head to the [API reference](https://python.langchain.com/api_reference/__package_name_short_snake__/chat_models/__module_name__.chat_models.Chat__ModuleName__.html)"
+      ]
+    }
+  ],
+  "metadata": {
+    "kernelspec": {
+      "display_name": "Python 3 (ipykernel)",
+      "language": "python",
+      "name": "python3"
+    },
+    "language_info": {
+      "codemirror_mode": {
+        "name": "ipython",
+        "version": 3
+      },
+      "file_extension": ".py",
+      "mimetype": "text/x-python",
+      "name": "python",
+      "nbconvert_exporter": "python",
+      "pygments_lexer": "ipython3",
+      "version": "3.11.9"
+    }
   },
-  {
-   "cell_type": "markdown",
-   "id": "e49f1e0d",
-   "metadata": {},
-   "source": [
-    "# Chat__ModuleName__\n",
-    "\n",
-    "- TODO: Make sure API reference link is correct.\n",
-    "\n",
-    "This will help you get started with __ModuleName__ [chat models](/docs/concepts/chat_models). For detailed documentation of all Chat__ModuleName__ features and configurations head to the [API reference](https://python.langchain.com/api_reference/__package_name_short_snake__/chat_models/__module_name__.chat_models.Chat__ModuleName__.html).\n",
-    "\n",
-    "- TODO: Add any other relevant links, like information about models, prices, context windows, etc. See https://python.langchain.com/docs/integrations/chat/openai/ for an example.\n",
-    "\n",
-    "## Overview\n",
-    "### Integration details\n",
-    "\n",
-    "- TODO: Fill in table features.\n",
-    "- TODO: Remove JS support link if not relevant, otherwise ensure link is correct.\n",
-    "- TODO: Make sure API reference links are correct.\n",
-    "\n",
-    "| Class | Package | Local | Serializable | [JS support](https://js.langchain.com/docs/integrations/chat/__package_name_short_snake__) | Package downloads | Package latest |\n",
-    "| :--- | :--- | :---: | :---: |  :---: | :---: | :---: |\n",
-    "| [Chat__ModuleName__](https://python.langchain.com/api_reference/__package_name_short_snake__/chat_models/__module_name__.chat_models.Chat__ModuleName__.html) | [__package_name__](https://python.langchain.com/api_reference/__package_name_short_snake__/) | ✅/❌ | beta/❌ | ✅/❌ | ![PyPI - Downloads](https://img.shields.io/pypi/dm/__package_name__?style=flat-square&label=%20) | ![PyPI - Version](https://img.shields.io/pypi/v/__package_name__?style=flat-square&label=%20) |\n",
-    "\n",
-    "### Model features\n",
-    "| [Tool calling](/docs/how_to/tool_calling) | [Structured output](/docs/how_to/structured_output/) | JSON mode | [Image input](/docs/how_to/multimodal_inputs/) | Audio input | Video input | [Token-level streaming](/docs/how_to/chat_streaming/) | Native async | [Token usage](/docs/how_to/chat_token_usage_tracking/) | [Logprobs](/docs/how_to/logprobs/) |\n",
-    "| :---: | :---: | :---: | :---: |  :---: | :---: | :---: | :---: | :---: | :---: |\n",
-    "| ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ | ✅/❌ |\n",
-    "\n",
-    "## Setup\n",
-    "\n",
-    "- TODO: Update with relevant info.\n",
-    "\n",
-    "To access __ModuleName__ models you'll need to create a/an __ModuleName__ account, get an API key, and install the `__package_name__` integration package.\n",
-    "\n",
-    "### Credentials\n",
-    "\n",
-    "- TODO: Update with relevant info.\n",
-    "\n",
-    "Head to (TODO: link) to sign up to __ModuleName__ and generate an API key. Once you've done this set the __MODULE_NAME___API_KEY environment variable:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "433e8d2b-9519-4b49-b2c4-7ab65b046c94",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "import getpass\n",
-    "import os\n",
-    "\n",
-    "if not os.getenv(\"__MODULE_NAME___API_KEY\"):\n",
-    "    os.environ[\"__MODULE_NAME___API_KEY\"] = getpass.getpass(\n",
-    "        \"Enter your __ModuleName__ API key: \"\n",
-    "    )"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "72ee0c4b-9764-423a-9dbf-95129e185210",
-   "metadata": {},
-   "source": "To enable automated tracing of your model calls, set your [LangSmith](https://docs.smith.langchain.com/) API key:"
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "a15d341e-3e26-4ca3-830b-5aab30ed66de",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# os.environ[\"LANGSMITH_TRACING\"] = \"true\"\n",
-    "# os.environ[\"LANGSMITH_API_KEY\"] = getpass.getpass(\"Enter your LangSmith API key: \")"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "0730d6a1-c893-4840-9817-5e5251676d5d",
-   "metadata": {},
-   "source": [
-    "### Installation\n",
-    "\n",
-    "The LangChain __ModuleName__ integration lives in the `__package_name__` package:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "652d6238-1f87-422a-b135-f5abbb8652fc",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "%pip install -qU __package_name__"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "a38cde65-254d-4219-a441-068766c0d4b5",
-   "metadata": {},
-   "source": [
-    "## Instantiation\n",
-    "\n",
-    "Now we can instantiate our model object and generate chat completions:\n",
-    "\n",
-    "- TODO: Update model instantiation with relevant params."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "cb09c344-1836-4e0c-acf8-11d13ac1dbae",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from __module_name__ import Chat__ModuleName__\n",
-    "\n",
-    "llm = Chat__ModuleName__(\n",
-    "    model=\"model-name\",\n",
-    "    temperature=0,\n",
-    "    max_tokens=None,\n",
-    "    timeout=None,\n",
-    "    max_retries=2,\n",
-    "    # other params...\n",
-    ")"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "2b4f3e15",
-   "metadata": {},
-   "source": [
-    "## Invocation\n",
-    "\n",
-    "- TODO: Run cells so output can be seen."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "62e0dbc3",
-   "metadata": {
-    "tags": []
-   },
-   "outputs": [],
-   "source": [
-    "messages = [\n",
-    "    (\n",
-    "        \"system\",\n",
-    "        \"You are a helpful assistant that translates English to French. Translate the user sentence.\",\n",
-    "    ),\n",
-    "    (\"human\", \"I love programming.\"),\n",
-    "]\n",
-    "ai_msg = llm.invoke(messages)\n",
-    "ai_msg"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "d86145b3-bfef-46e8-b227-4dda5c9c2705",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "print(ai_msg.content)"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "18e2bfc0-7e78-4528-a73f-499ac150dca8",
-   "metadata": {},
-   "source": [
-    "## Chaining\n",
-    "\n",
-    "We can [chain](/docs/how_to/sequence/) our model with a prompt template like so:\n",
-    "\n",
-    "- TODO: Run cells so output can be seen."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "e197d1d7-a070-4c96-9f8a-a0e86d046e0b",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from langchain_core.prompts import ChatPromptTemplate\n",
-    "\n",
-    "prompt = ChatPromptTemplate(\n",
-    "    [\n",
-    "        (\n",
-    "            \"system\",\n",
-    "            \"You are a helpful assistant that translates {input_language} to {output_language}.\",\n",
-    "        ),\n",
-    "        (\"human\", \"{input}\"),\n",
-    "    ]\n",
-    ")\n",
-    "\n",
-    "chain = prompt | llm\n",
-    "chain.invoke(\n",
-    "    {\n",
-    "        \"input_language\": \"English\",\n",
-    "        \"output_language\": \"German\",\n",
-    "        \"input\": \"I love programming.\",\n",
-    "    }\n",
-    ")"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "d1ee55bc-ffc8-4cfa-801c-993953a08cfd",
-   "metadata": {},
-   "source": [
-    "## TODO: Any functionality specific to this model provider\n",
-    "\n",
-    "E.g. creating/using finetuned models via this provider. Delete if not relevant."
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "3a5bb5ca-c3ae-4a58-be67-2cd18574b9a3",
-   "metadata": {},
-   "source": [
-    "## API reference\n",
-    "\n",
-    "For detailed documentation of all Chat__ModuleName__ features and configurations head to the [API reference](https://python.langchain.com/api_reference/__package_name_short_snake__/chat_models/__module_name__.chat_models.Chat__ModuleName__.html)"
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Python 3 (ipykernel)",
-   "language": "python",
-   "name": "python3"
-  },
-  "language_info": {
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 3
-   },
-   "file_extension": ".py",
-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.11.9"
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 5
+  "nbformat": 4,
+  "nbformat_minor": 5
 }

libs/cli/langchain_cli/integration_template/docs/llms.ipynb

@@ -1,236 +1,238 @@
 {
- "cells": [
-  {
-   "cell_type": "raw",
-   "id": "67db2992",
-   "metadata": {},
-   "source": [
-    "---\n",
-    "sidebar_label: __ModuleName__\n",
-    "---"
-   ]
+  "cells": [
+    {
+      "cell_type": "raw",
+      "id": "67db2992",
+      "metadata": {},
+      "source": [
+        "---\n",
+        "sidebar_label: __ModuleName__\n",
+        "---"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "9597802c",
+      "metadata": {},
+      "source": [
+        "# __ModuleName__LLM\n",
+        "\n",
+        "- [ ] TODO: Make sure API reference link is correct\n",
+        "\n",
+        "This will help you get started with __ModuleName__ completion models (LLMs) using LangChain. For detailed documentation on `__ModuleName__LLM` features and configuration options, please refer to the [API reference](https://api.python.langchain.com/en/latest/llms/__module_name__.llms.__ModuleName__LLM.html).\n",
+        "\n",
+        "## Overview\n",
+        "### Integration details\n",
+        "\n",
+        "- TODO: Fill in table features.\n",
+        "- TODO: Remove JS support link if not relevant, otherwise ensure link is correct.\n",
+        "- TODO: Make sure API reference links are correct.\n",
+        "\n",
+        "| Class | Package | Local | Serializable | [JS support](https://js.langchain.com/docs/integrations/llms/__package_name_short_snake__) | Package downloads | Package latest |\n",
+        "| :--- | :--- | :---: | :---: |  :---: | :---: | :---: |\n",
+        "| [__ModuleName__LLM](https://api.python.langchain.com/en/latest/llms/__module_name__.llms.__ModuleName__LLM.html) | [__package_name__](https://api.python.langchain.com/en/latest/__package_name_short_snake___api_reference.html) | ✅/❌ | beta/❌ | ✅/❌ | ![PyPI - Downloads](https://img.shields.io/pypi/dm/__package_name__&label=%20) | ![PyPI - Version](https://img.shields.io/pypi/v/__package_name__&label=%20) |\n",
+        "\n",
+        "## Setup\n",
+        "\n",
+        "- TODO: Update with relevant info.\n",
+        "\n",
+        "To access __ModuleName__ models you'll need to create a/an __ModuleName__ account, get an API key, and install the `__package_name__` integration package.\n",
+        "\n",
+        "### Credentials\n",
+        "\n",
+        "- TODO: Update with relevant info.\n",
+        "\n",
+        "Head to (TODO: link) to sign up to __ModuleName__ and generate an API key. Once you've done this set the __MODULE_NAME___API_KEY environment variable:"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "bc51e756",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "import getpass\n",
+        "import os\n",
+        "\n",
+        "if not os.getenv(\"__MODULE_NAME___API_KEY\"):\n",
+        "    os.environ[\"__MODULE_NAME___API_KEY\"] = getpass.getpass(\n",
+        "        \"Enter your __ModuleName__ API key: \"\n",
+        "    )"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "4b6e1ca6",
+      "metadata": {},
+      "source": [
+        "To enable automated tracing of your model calls, set your [LangSmith](https://docs.smith.langchain.com/) API key:"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "196c2b41",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "# os.environ[\"LANGSMITH_TRACING\"] = \"true\"\n",
+        "# os.environ[\"LANGSMITH_API_KEY\"] = getpass.getpass(\"Enter your LangSmith API key: \")"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "809c6577",
+      "metadata": {},
+      "source": [
+        "### Installation\n",
+        "\n",
+        "The LangChain __ModuleName__ integration lives in the `__package_name__` package:"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "59c710c4",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "%pip install -qU __package_name__"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "0a760037",
+      "metadata": {},
+      "source": [
+        "## Instantiation\n",
+        "\n",
+        "Now we can instantiate our model object and generate chat completions:\n",
+        "\n",
+        "- TODO: Update model instantiation with relevant params."
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "a0562a13",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "from __module_name__ import __ModuleName__LLM\n",
+        "\n",
+        "model = __ModuleName__LLM(\n",
+        "    model=\"model-name\",\n",
+        "    temperature=0,\n",
+        "    max_tokens=None,\n",
+        "    timeout=None,\n",
+        "    max_retries=2,\n",
+        "    # other params...\n",
+        ")"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "0ee90032",
+      "metadata": {},
+      "source": [
+        "## Invocation\n",
+        "\n",
+        "- [ ] TODO: Run cells so output can be seen."
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "035dea0f",
+      "metadata": {
+        "tags": []
+      },
+      "outputs": [],
+      "source": [
+        "input_text = \"__ModuleName__ is an AI company that \"\n",
+        "\n",
+        "completion = model.invoke(input_text)\n",
+        "completion"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "add38532",
+      "metadata": {},
+      "source": [
+        "## Chaining\n",
+        "\n",
+        "We can [chain](/docs/how_to/sequence/) our completion model with a prompt template like so:\n",
+        "\n",
+        "- TODO: Run cells so output can be seen."
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "078e9db2",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "from langchain_core.prompts import PromptTemplate\n",
+        "\n",
+        "prompt = PromptTemplate(\"How to say {input} in {output_language}:\\n\")\n",
+        "\n",
+        "chain = prompt | model\n",
+        "chain.invoke(\n",
+        "    {\n",
+        "        \"output_language\": \"German\",\n",
+        "        \"input\": \"I love programming.\",\n",
+        "    }\n",
+        ")"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "e99eef30",
+      "metadata": {},
+      "source": [
+        "## TODO: Any functionality specific to this model provider\n",
+        "\n",
+        "E.g. creating/using finetuned models via this provider. Delete if not relevant"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "e9bdfcef",
+      "metadata": {},
+      "source": [
+        "## API reference\n",
+        "\n",
+        "For detailed documentation of all `__ModuleName__LLM` features and configurations head to the API reference: https://api.python.langchain.com/en/latest/llms/__module_name__.llms.__ModuleName__LLM.html"
+      ]
+    }
+  ],
+  "metadata": {
+    "kernelspec": {
+      "display_name": "Python 3.11.1 64-bit",
+      "language": "python",
+      "name": "python3"
+    },
+    "language_info": {
+      "codemirror_mode": {
+        "name": "ipython",
+        "version": 3
+      },
+      "file_extension": ".py",
+      "mimetype": "text/x-python",
+      "name": "python",
+      "nbconvert_exporter": "python",
+      "pygments_lexer": "ipython3",
+      "version": "3.9.7"
+    },
+    "vscode": {
+      "interpreter": {
+        "hash": "e971737741ff4ec9aff7dc6155a1060a59a8a6d52c757dbbe66bf8ee389494b1"
+      }
+    }
   },
-  {
-   "cell_type": "markdown",
-   "id": "9597802c",
-   "metadata": {},
-   "source": [
-    "# __ModuleName__LLM\n",
-    "\n",
-    "- [ ] TODO: Make sure API reference link is correct\n",
-    "\n",
-    "This will help you get started with __ModuleName__ completion models (LLMs) using LangChain. For detailed documentation on `__ModuleName__LLM` features and configuration options, please refer to the [API reference](https://api.python.langchain.com/en/latest/llms/__module_name__.llms.__ModuleName__LLM.html).\n",
-    "\n",
-    "## Overview\n",
-    "### Integration details\n",
-    "\n",
-    "- TODO: Fill in table features.\n",
-    "- TODO: Remove JS support link if not relevant, otherwise ensure link is correct.\n",
-    "- TODO: Make sure API reference links are correct.\n",
-    "\n",
-    "| Class | Package | Local | Serializable | [JS support](https://js.langchain.com/docs/integrations/llms/__package_name_short_snake__) | Package downloads | Package latest |\n",
-    "| :--- | :--- | :---: | :---: |  :---: | :---: | :---: |\n",
-    "| [__ModuleName__LLM](https://api.python.langchain.com/en/latest/llms/__module_name__.llms.__ModuleName__LLM.html) | [__package_name__](https://api.python.langchain.com/en/latest/__package_name_short_snake___api_reference.html) | ✅/❌ | beta/❌ | ✅/❌ | ![PyPI - Downloads](https://img.shields.io/pypi/dm/__package_name__?style=flat-square&label=%20) | ![PyPI - Version](https://img.shields.io/pypi/v/__package_name__?style=flat-square&label=%20) |\n",
-    "\n",
-    "## Setup\n",
-    "\n",
-    "- TODO: Update with relevant info.\n",
-    "\n",
-    "To access __ModuleName__ models you'll need to create a/an __ModuleName__ account, get an API key, and install the `__package_name__` integration package.\n",
-    "\n",
-    "### Credentials\n",
-    "\n",
-    "- TODO: Update with relevant info.\n",
-    "\n",
-    "Head to (TODO: link) to sign up to __ModuleName__ and generate an API key. Once you've done this set the __MODULE_NAME___API_KEY environment variable:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "bc51e756",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "import getpass\n",
-    "import os\n",
-    "\n",
-    "if not os.getenv(\"__MODULE_NAME___API_KEY\"):\n",
-    "    os.environ[\"__MODULE_NAME___API_KEY\"] = getpass.getpass(\n",
-    "        \"Enter your __ModuleName__ API key: \"\n",
-    "    )"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "4b6e1ca6",
-   "metadata": {},
-   "source": "To enable automated tracing of your model calls, set your [LangSmith](https://docs.smith.langchain.com/) API key:"
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "196c2b41",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# os.environ[\"LANGSMITH_TRACING\"] = \"true\"\n",
-    "# os.environ[\"LANGSMITH_API_KEY\"] = getpass.getpass(\"Enter your LangSmith API key: \")"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "809c6577",
-   "metadata": {},
-   "source": [
-    "### Installation\n",
-    "\n",
-    "The LangChain __ModuleName__ integration lives in the `__package_name__` package:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "59c710c4",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "%pip install -qU __package_name__"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "0a760037",
-   "metadata": {},
-   "source": [
-    "## Instantiation\n",
-    "\n",
-    "Now we can instantiate our model object and generate chat completions:\n",
-    "\n",
-    "- TODO: Update model instantiation with relevant params."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "a0562a13",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from __module_name__ import __ModuleName__LLM\n",
-    "\n",
-    "llm = __ModuleName__LLM(\n",
-    "    model=\"model-name\",\n",
-    "    temperature=0,\n",
-    "    max_tokens=None,\n",
-    "    timeout=None,\n",
-    "    max_retries=2,\n",
-    "    # other params...\n",
-    ")"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "0ee90032",
-   "metadata": {},
-   "source": [
-    "## Invocation\n",
-    "\n",
-    "- [ ] TODO: Run cells so output can be seen."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 4,
-   "id": "035dea0f",
-   "metadata": {
-    "tags": []
-   },
-   "outputs": [],
-   "source": [
-    "input_text = \"__ModuleName__ is an AI company that \"\n",
-    "\n",
-    "completion = llm.invoke(input_text)\n",
-    "completion"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "add38532",
-   "metadata": {},
-   "source": [
-    "## Chaining\n",
-    "\n",
-    "We can [chain](/docs/how_to/sequence/) our completion model with a prompt template like so:\n",
-    "\n",
-    "- TODO: Run cells so output can be seen."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "078e9db2",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from langchain_core.prompts import PromptTemplate\n",
-    "\n",
-    "prompt = PromptTemplate(\"How to say {input} in {output_language}:\\n\")\n",
-    "\n",
-    "chain = prompt | llm\n",
-    "chain.invoke(\n",
-    "    {\n",
-    "        \"output_language\": \"German\",\n",
-    "        \"input\": \"I love programming.\",\n",
-    "    }\n",
-    ")"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "e99eef30",
-   "metadata": {},
-   "source": [
-    "## TODO: Any functionality specific to this model provider\n",
-    "\n",
-    "E.g. creating/using finetuned models via this provider. Delete if not relevant"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "e9bdfcef",
-   "metadata": {},
-   "source": [
-    "## API reference\n",
-    "\n",
-    "For detailed documentation of all `__ModuleName__LLM` features and configurations head to the API reference: https://api.python.langchain.com/en/latest/llms/__module_name__.llms.__ModuleName__LLM.html"
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Python 3.11.1 64-bit",
-   "language": "python",
-   "name": "python3"
-  },
-  "language_info": {
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 3
-   },
-   "file_extension": ".py",
-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.9.7"
-  },
-  "vscode": {
-   "interpreter": {
-    "hash": "e971737741ff4ec9aff7dc6155a1060a59a8a6d52c757dbbe66bf8ee389494b1"
-   }
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 5
+  "nbformat": 4,
+  "nbformat_minor": 5
 }

libs/cli/langchain_cli/integration_template/docs/retrievers.ipynb

@@ -155,7 +155,7 @@
     "\n",
     "from langchain_openai import ChatOpenAI\n",
     "\n",
-    "llm = ChatOpenAI(model=\"gpt-3.5-turbo-0125\", temperature=0)"
+    "model = ChatOpenAI(model=\"gpt-3.5-turbo-0125\", temperature=0)"
    ]
   },
   {
@@ -185,7 +185,7 @@
     "chain = (\n",
     "    {\"context\": retriever | format_docs, \"question\": RunnablePassthrough()}\n",
     "    | prompt\n",
-    "    | llm\n",
+    "    | model\n",
     "    | StrOutputParser()\n",
     ")"
    ]

libs/cli/langchain_cli/integration_template/docs/stores.ipynb

@@ -1,204 +1,204 @@
 {
- "cells": [
-  {
-   "cell_type": "raw",
-   "metadata": {
-    "vscode": {
-     "languageId": "raw"
+  "cells": [
+    {
+      "cell_type": "raw",
+      "metadata": {
+        "vscode": {
+          "languageId": "raw"
+        }
+      },
+      "source": [
+        "---\n",
+        "sidebar_label: __ModuleName__ByteStore\n",
+        "---"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+        "# __ModuleName__ByteStore\n",
+        "\n",
+        "- TODO: Make sure API reference link is correct.\n",
+        "\n",
+        "This will help you get started with __ModuleName__ [key-value stores](/docs/concepts/#key-value-stores). For detailed documentation of all __ModuleName__ByteStore features and configurations head to the [API reference](https://python.langchain.com/v0.2/api_reference/core/stores/langchain_core.stores.__module_name__ByteStore.html).\n",
+        "\n",
+        "- TODO: Add any other relevant links, like information about models, prices, context windows, etc. See https://python.langchain.com/docs/integrations/stores/in_memory/ for an example.\n",
+        "\n",
+        "## Overview\n",
+        "\n",
+        "- TODO: (Optional) A short introduction to the underlying technology/API.\n",
+        "\n",
+        "### Integration details\n",
+        "\n",
+        "- TODO: Fill in table features.\n",
+        "- TODO: Remove JS support link if not relevant, otherwise ensure link is correct.\n",
+        "- TODO: Make sure API reference links are correct.\n",
+        "\n",
+        "| Class | Package | Local | [JS support](https://js.langchain.com/docs/integrations/stores/_package_name_) | Package downloads | Package latest |\n",
+        "| :--- | :--- | :---: | :---: |  :---: | :---: |\n",
+        "| [__ModuleName__ByteStore](https://api.python.langchain.com/en/latest/stores/__module_name__.stores.__ModuleName__ByteStore.html) | [__package_name__](https://api.python.langchain.com/en/latest/__package_name_short_snake___api_reference.html) | ✅/❌ | ✅/❌ | ![PyPI - Downloads](https://img.shields.io/pypi/dm/__package_name__&label=%20) | ![PyPI - Version](https://img.shields.io/pypi/v/__package_name__&label=%20) |\n",
+        "\n",
+        "## Setup\n",
+        "\n",
+        "- TODO: Update with relevant info.\n",
+        "\n",
+        "To create a __ModuleName__ byte store, you'll need to create a/an __ModuleName__ account, get an API key, and install the `__package_name__` integration package.\n",
+        "\n",
+        "### Credentials\n",
+        "\n",
+        "- TODO: Update with relevant info, or omit if the service does not require any credentials.\n",
+        "\n",
+        "Head to (TODO: link) to sign up to __ModuleName__ and generate an API key. Once you've done this set the __MODULE_NAME___API_KEY environment variable:"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "import getpass\n",
+        "import os\n",
+        "\n",
+        "if not os.getenv(\"__MODULE_NAME___API_KEY\"):\n",
+        "    os.environ[\"__MODULE_NAME___API_KEY\"] = getpass.getpass(\n",
+        "        \"Enter your __ModuleName__ API key: \"\n",
+        "    )"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+        "### Installation\n",
+        "\n",
+        "The LangChain __ModuleName__ integration lives in the `__package_name__` package:"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "%pip install -qU __package_name__"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+        "## Instantiation\n",
+        "\n",
+        "Now we can instantiate our byte store:\n",
+        "\n",
+        "- TODO: Update model instantiation with relevant params."
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "from __module_name__ import __ModuleName__ByteStore\n",
+        "\n",
+        "kv_store = __ModuleName__ByteStore(\n",
+        "    # params...\n",
+        ")"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+        "## Usage\n",
+        "\n",
+        "- TODO: Run cells so output can be seen.\n",
+        "\n",
+        "You can set data under keys like this using the `mset` method:"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "kv_store.mset(\n",
+        "    [\n",
+        "        [\"key1\", b\"value1\"],\n",
+        "        [\"key2\", b\"value2\"],\n",
+        "    ]\n",
+        ")\n",
+        "\n",
+        "kv_store.mget(\n",
+        "    [\n",
+        "        \"key1\",\n",
+        "        \"key2\",\n",
+        "    ]\n",
+        ")"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+        "And you can delete data using the `mdelete` method:"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "kv_store.mdelete(\n",
+        "    [\n",
+        "        \"key1\",\n",
+        "        \"key2\",\n",
+        "    ]\n",
+        ")\n",
+        "\n",
+        "kv_store.mget(\n",
+        "    [\n",
+        "        \"key1\",\n",
+        "        \"key2\",\n",
+        "    ]\n",
+        ")"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+        "## TODO: Any functionality specific to this key-value store provider\n",
+        "\n",
+        "E.g. extra initialization. Delete if not relevant."
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "metadata": {},
+      "source": [
+        "## API reference\n",
+        "\n",
+        "For detailed documentation of all __ModuleName__ByteStore features and configurations, head to the API reference: https://api.python.langchain.com/en/latest/stores/__module_name__.stores.__ModuleName__ByteStore.html"
+      ]
+    }
+  ],
+  "metadata": {
+    "kernelspec": {
+      "display_name": "Python 3",
+      "language": "python",
+      "name": "python3"
+    },
+    "language_info": {
+      "name": "python",
+      "version": "3.10.5"
     }
-   },
-   "source": [
-    "---\n",
-    "sidebar_label: __ModuleName__ByteStore\n",
-    "---"
-   ]
   },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "# __ModuleName__ByteStore\n",
-    "\n",
-    "- TODO: Make sure API reference link is correct.\n",
-    "\n",
-    "This will help you get started with __ModuleName__ [key-value stores](/docs/concepts/#key-value-stores). For detailed documentation of all __ModuleName__ByteStore features and configurations head to the [API reference](https://python.langchain.com/v0.2/api_reference/core/stores/langchain_core.stores.__module_name__ByteStore.html).\n",
-    "\n",
-    "- TODO: Add any other relevant links, like information about models, prices, context windows, etc. See https://python.langchain.com/docs/integrations/stores/in_memory/ for an example.\n",
-    "\n",
-    "## Overview\n",
-    "\n",
-    "- TODO: (Optional) A short introduction to the underlying technology/API.\n",
-    "\n",
-    "### Integration details\n",
-    "\n",
-    "- TODO: Fill in table features.\n",
-    "- TODO: Remove JS support link if not relevant, otherwise ensure link is correct.\n",
-    "- TODO: Make sure API reference links are correct.\n",
-    "\n",
-    "| Class | Package | Local | [JS support](https://js.langchain.com/docs/integrations/stores/_package_name_) | Package downloads | Package latest |\n",
-    "| :--- | :--- | :---: | :---: |  :---: | :---: |\n",
-    "| [__ModuleName__ByteStore](https://api.python.langchain.com/en/latest/stores/__module_name__.stores.__ModuleName__ByteStore.html) | [__package_name__](https://api.python.langchain.com/en/latest/__package_name_short_snake___api_reference.html) | ✅/❌ | ✅/❌ | ![PyPI - Downloads](https://img.shields.io/pypi/dm/__package_name__?style=flat-square&label=%20) | ![PyPI - Version](https://img.shields.io/pypi/v/__package_name__?style=flat-square&label=%20) |\n",
-    "\n",
-    "## Setup\n",
-    "\n",
-    "- TODO: Update with relevant info.\n",
-    "\n",
-    "To create a __ModuleName__ byte store, you'll need to create a/an __ModuleName__ account, get an API key, and install the `__package_name__` integration package.\n",
-    "\n",
-    "### Credentials\n",
-    "\n",
-    "- TODO: Update with relevant info, or omit if the service does not require any credentials.\n",
-    "\n",
-    "Head to (TODO: link) to sign up to __ModuleName__ and generate an API key. Once you've done this set the __MODULE_NAME___API_KEY environment variable:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "import getpass\n",
-    "import os\n",
-    "\n",
-    "if not os.getenv(\"__MODULE_NAME___API_KEY\"):\n",
-    "    os.environ[\"__MODULE_NAME___API_KEY\"] = getpass.getpass(\n",
-    "        \"Enter your __ModuleName__ API key: \"\n",
-    "    )"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "### Installation\n",
-    "\n",
-    "The LangChain __ModuleName__ integration lives in the `__package_name__` package:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "%pip install -qU __package_name__"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Instantiation\n",
-    "\n",
-    "Now we can instantiate our byte store:\n",
-    "\n",
-    "- TODO: Update model instantiation with relevant params."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from __module_name__ import __ModuleName__ByteStore\n",
-    "\n",
-    "kv_store = __ModuleName__ByteStore(\n",
-    "    # params...\n",
-    ")"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## Usage\n",
-    "\n",
-    "- TODO: Run cells so output can be seen.\n",
-    "\n",
-    "You can set data under keys like this using the `mset` method:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "kv_store.mset(\n",
-    "    [\n",
-    "        [\"key1\", b\"value1\"],\n",
-    "        [\"key2\", b\"value2\"],\n",
-    "    ]\n",
-    ")\n",
-    "\n",
-    "kv_store.mget(\n",
-    "    [\n",
-    "        \"key1\",\n",
-    "        \"key2\",\n",
-    "    ]\n",
-    ")"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "And you can delete data using the `mdelete` method:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "kv_store.mdelete(\n",
-    "    [\n",
-    "        \"key1\",\n",
-    "        \"key2\",\n",
-    "    ]\n",
-    ")\n",
-    "\n",
-    "kv_store.mget(\n",
-    "    [\n",
-    "        \"key1\",\n",
-    "        \"key2\",\n",
-    "    ]\n",
-    ")"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## TODO: Any functionality specific to this key-value store provider\n",
-    "\n",
-    "E.g. extra initialization. Delete if not relevant."
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "## API reference\n",
-    "\n",
-    "For detailed documentation of all __ModuleName__ByteStore features and configurations, head to the API reference: https://api.python.langchain.com/en/latest/stores/__module_name__.stores.__ModuleName__ByteStore.html"
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Python 3",
-   "language": "python",
-   "name": "python3"
-  },
-  "language_info": {
-   "name": "python",
-   "version": "3.10.5"
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 2
+  "nbformat": 4,
+  "nbformat_minor": 2
 }

libs/cli/langchain_cli/integration_template/docs/tools.ipynb

@@ -1,271 +1,271 @@
 {
- "cells": [
-  {
-   "cell_type": "raw",
-   "id": "10238e62-3465-4973-9279-606cbb7ccf16",
-   "metadata": {},
-   "source": [
-    "---\n",
-    "sidebar_label: __ModuleName__\n",
-    "---"
-   ]
+  "cells": [
+    {
+      "cell_type": "raw",
+      "id": "10238e62-3465-4973-9279-606cbb7ccf16",
+      "metadata": {},
+      "source": [
+        "---\n",
+        "sidebar_label: __ModuleName__\n",
+        "---"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "a6f91f20",
+      "metadata": {},
+      "source": [
+        "# __ModuleName__\n",
+        "\n",
+        "- TODO: Make sure API reference link is correct.\n",
+        "\n",
+        "This notebook provides a quick overview for getting started with __ModuleName__ [tool](/docs/integrations/tools/). For detailed documentation of all __ModuleName__ features and configurations head to the [API reference](https://python.langchain.com/v0.2/api_reference/community/tools/langchain_community.tools.__module_name__.tool.__ModuleName__.html).\n",
+        "\n",
+        "- TODO: Add any other relevant links, like information about underlying API, etc.\n",
+        "\n",
+        "## Overview\n",
+        "\n",
+        "### Integration details\n",
+        "\n",
+        "- TODO: Make sure links and features are correct\n",
+        "\n",
+        "| Class | Package | Serializable | [JS support](https://js.langchain.com/docs/integrations/tools/__module_name__) |  Package latest |\n",
+        "| :--- | :--- | :---: | :---: | :---: |\n",
+        "| [__ModuleName__](https://python.langchain.com/v0.2/api_reference/community/tools/langchain_community.tools.__module_name__.tool.__ModuleName__.html) | [langchain-community](https://api.python.langchain.com/en/latest/community_api_reference.html) | beta/❌ | ✅/❌ |  ![PyPI - Version](https://img.shields.io/pypi/v/langchain-community&label=%20) |\n",
+        "\n",
+        "### Tool features\n",
+        "\n",
+        "- TODO: Add feature table if it makes sense\n",
+        "\n",
+        "\n",
+        "## Setup\n",
+        "\n",
+        "- TODO: Add any additional deps\n",
+        "\n",
+        "The integration lives in the `langchain-community` package."
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "f85b4089",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "%pip install --quiet -U langchain-community"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "b15e9266",
+      "metadata": {},
+      "source": [
+        "### Credentials\n",
+        "\n",
+        "- TODO: Add any credentials that are needed"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": 2,
+      "id": "e0b178a2-8816-40ca-b57c-ccdd86dde9c9",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "import getpass\n",
+        "import os\n",
+        "\n",
+        "# if not os.environ.get(\"__MODULE_NAME___API_KEY\"):\n",
+        "#     os.environ[\"__MODULE_NAME___API_KEY\"] = getpass.getpass(\"__MODULE_NAME__ API key:\\n\")"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "bc5ab717-fd27-4c59-b912-bdd099541478",
+      "metadata": {},
+      "source": [
+        "It's also helpful (but not needed) to set up [LangSmith](https://smith.langchain.com/) for best-in-class observability:"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": 3,
+      "id": "a6c2f136-6367-4f1f-825d-ae741e1bf281",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "# os.environ[\"LANGSMITH_TRACING\"] = \"true\"\n",
+        "# os.environ[\"LANGSMITH_API_KEY\"] = getpass.getpass()"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "1c97218f-f366-479d-8bf7-fe9f2f6df73f",
+      "metadata": {},
+      "source": [
+        "## Instantiation\n",
+        "\n",
+        "- TODO: Fill in instantiation params\n",
+        "\n",
+        "Here we show how to instantiate an instance of the __ModuleName__ tool, with "
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": 4,
+      "id": "8b3ddfe9-ca79-494c-a7ab-1f56d9407a64",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "from langchain_community.tools import __ModuleName__\n",
+        "\n",
+        "\n",
+        "tool = __ModuleName__(...)"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "74147a1a",
+      "metadata": {},
+      "source": [
+        "## Invocation\n",
+        "\n",
+        "### [Invoke directly with args](/docs/concepts/tools/#use-the-tool-directly)\n",
+        "\n",
+        "- TODO: Describe what the tool args are, fill them in, run cell"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "65310a8b-eb0c-4d9e-a618-4f4abe2414fc",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "tool.invoke({...})"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "d6e73897",
+      "metadata": {},
+      "source": [
+        "### [Invoke with ToolCall](/docs/concepts/tool_calling/#tool-execution)\n",
+        "\n",
+        "We can also invoke the tool with a model-generated ToolCall, in which case a ToolMessage will be returned:\n",
+        "\n",
+        "- TODO: Fill in tool args and run cell"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "f90e33a7",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "# This is usually generated by a model, but we'll create a tool call directly for demo purposes.\n",
+        "model_generated_tool_call = {\n",
+        "    \"args\": {...},  # TODO: FILL IN\n",
+        "    \"id\": \"1\",\n",
+        "    \"name\": tool.name,\n",
+        "    \"type\": \"tool_call\",\n",
+        "}\n",
+        "tool.invoke(model_generated_tool_call)"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "659f9fbd-6fcf-445f-aa8c-72d8e60154bd",
+      "metadata": {},
+      "source": [
+        "## Use within an agent\n",
+        "\n",
+        "- TODO: Add user question and run cells\n",
+        "\n",
+        "We can use our tool in an [agent](/docs/concepts/agents/). For this we will need a LLM with [tool-calling](/docs/how_to/tool_calling/) capabilities:\n",
+        "\n",
+        "import ChatModelTabs from \"@theme/ChatModelTabs\";\n",
+        "\n",
+        "<ChatModelTabs customVarName=\"llm\" />\n"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "af3123ad-7a02-40e5-b58e-7d56e23e5830",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "# | output: false\n",
+        "# | echo: false\n",
+        "\n",
+        "# !pip install -qU langchain langchain-openai\n",
+        "from langchain.chat_models import init_chat_model\n",
+        "\n",
+        "model = init_chat_model(model=\"gpt-4o\", model_provider=\"openai\")"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "bea35fa1",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "from langgraph.prebuilt import create_react_agent\n",
+        "\n",
+        "tools = [tool]\n",
+        "agent = create_react_agent(model, tools)"
+      ]
+    },
+    {
+      "cell_type": "code",
+      "execution_count": null,
+      "id": "fdbf35b5-3aaf-4947-9ec6-48c21533fb95",
+      "metadata": {},
+      "outputs": [],
+      "source": [
+        "example_query = \"...\"\n",
+        "\n",
+        "events = agent.stream(\n",
+        "    {\"messages\": [(\"user\", example_query)]},\n",
+        "    stream_mode=\"values\",\n",
+        ")\n",
+        "for event in events:\n",
+        "    event[\"messages\"][-1].pretty_print()"
+      ]
+    },
+    {
+      "cell_type": "markdown",
+      "id": "4ac8146c",
+      "metadata": {},
+      "source": [
+        "## API reference\n",
+        "\n",
+        "For detailed documentation of all __ModuleName__ features and configurations head to the API reference: https://python.langchain.com/v0.2/api_reference/community/tools/langchain_community.tools.__module_name__.tool.__ModuleName__.html"
+      ]
+    }
+  ],
+  "metadata": {
+    "kernelspec": {
+      "display_name": "poetry-venv-311",
+      "language": "python",
+      "name": "poetry-venv-311"
+    },
+    "language_info": {
+      "codemirror_mode": {
+        "name": "ipython",
+        "version": 3
+      },
+      "file_extension": ".py",
+      "mimetype": "text/x-python",
+      "name": "python",
+      "nbconvert_exporter": "python",
+      "pygments_lexer": "ipython3",
+      "version": "3.11.9"
+    }
   },
-  {
-   "cell_type": "markdown",
-   "id": "a6f91f20",
-   "metadata": {},
-   "source": [
-    "# __ModuleName__\n",
-    "\n",
-    "- TODO: Make sure API reference link is correct.\n",
-    "\n",
-    "This notebook provides a quick overview for getting started with __ModuleName__ [tool](/docs/integrations/tools/). For detailed documentation of all __ModuleName__ features and configurations head to the [API reference](https://python.langchain.com/v0.2/api_reference/community/tools/langchain_community.tools.__module_name__.tool.__ModuleName__.html).\n",
-    "\n",
-    "- TODO: Add any other relevant links, like information about underlying API, etc.\n",
-    "\n",
-    "## Overview\n",
-    "\n",
-    "### Integration details\n",
-    "\n",
-    "- TODO: Make sure links and features are correct\n",
-    "\n",
-    "| Class | Package | Serializable | [JS support](https://js.langchain.com/docs/integrations/tools/__module_name__) |  Package latest |\n",
-    "| :--- | :--- | :---: | :---: | :---: |\n",
-    "| [__ModuleName__](https://python.langchain.com/v0.2/api_reference/community/tools/langchain_community.tools.__module_name__.tool.__ModuleName__.html) | [langchain-community](https://api.python.langchain.com/en/latest/community_api_reference.html) | beta/❌ | ✅/❌ |  ![PyPI - Version](https://img.shields.io/pypi/v/langchain-community?style=flat-square&label=%20) |\n",
-    "\n",
-    "### Tool features\n",
-    "\n",
-    "- TODO: Add feature table if it makes sense\n",
-    "\n",
-    "\n",
-    "## Setup\n",
-    "\n",
-    "- TODO: Add any additional deps\n",
-    "\n",
-    "The integration lives in the `langchain-community` package."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "f85b4089",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "%pip install --quiet -U langchain-community"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "b15e9266",
-   "metadata": {},
-   "source": [
-    "### Credentials\n",
-    "\n",
-    "- TODO: Add any credentials that are needed"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 2,
-   "id": "e0b178a2-8816-40ca-b57c-ccdd86dde9c9",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "import getpass\n",
-    "import os\n",
-    "\n",
-    "# if not os.environ.get(\"__MODULE_NAME___API_KEY\"):\n",
-    "#     os.environ[\"__MODULE_NAME___API_KEY\"] = getpass.getpass(\"__MODULE_NAME__ API key:\\n\")"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "bc5ab717-fd27-4c59-b912-bdd099541478",
-   "metadata": {},
-   "source": [
-    "It's also helpful (but not needed) to set up [LangSmith](https://smith.langchain.com/) for best-in-class observability:"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 3,
-   "id": "a6c2f136-6367-4f1f-825d-ae741e1bf281",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# os.environ[\"LANGSMITH_TRACING\"] = \"true\"\n",
-    "# os.environ[\"LANGSMITH_API_KEY\"] = getpass.getpass()"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "1c97218f-f366-479d-8bf7-fe9f2f6df73f",
-   "metadata": {},
-   "source": [
-    "## Instantiation\n",
-    "\n",
-    "- TODO: Fill in instantiation params\n",
-    "\n",
-    "Here we show how to instantiate an instance of the __ModuleName__ tool, with "
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 4,
-   "id": "8b3ddfe9-ca79-494c-a7ab-1f56d9407a64",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from langchain_community.tools import __ModuleName__\n",
-    "\n",
-    "\n",
-    "tool = __ModuleName__(...)"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "74147a1a",
-   "metadata": {},
-   "source": [
-    "## Invocation\n",
-    "\n",
-    "### [Invoke directly with args](/docs/concepts/tools/#use-the-tool-directly)\n",
-    "\n",
-    "- TODO: Describe what the tool args are, fill them in, run cell"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "65310a8b-eb0c-4d9e-a618-4f4abe2414fc",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "tool.invoke({...})"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "d6e73897",
-   "metadata": {},
-   "source": [
-    "### [Invoke with ToolCall](/docs/concepts/tool_calling/#tool-execution)\n",
-    "\n",
-    "We can also invoke the tool with a model-generated ToolCall, in which case a ToolMessage will be returned:\n",
-    "\n",
-    "- TODO: Fill in tool args and run cell"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "f90e33a7",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# This is usually generated by a model, but we'll create a tool call directly for demo purposes.\n",
-    "model_generated_tool_call = {\n",
-    "    \"args\": {...},  # TODO: FILL IN\n",
-    "    \"id\": \"1\",\n",
-    "    \"name\": tool.name,\n",
-    "    \"type\": \"tool_call\",\n",
-    "}\n",
-    "tool.invoke(model_generated_tool_call)"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "659f9fbd-6fcf-445f-aa8c-72d8e60154bd",
-   "metadata": {},
-   "source": [
-    "## Use within an agent\n",
-    "\n",
-    "- TODO: Add user question and run cells\n",
-    "\n",
-    "We can use our tool in an [agent](/docs/concepts/agents/). For this we will need a LLM with [tool-calling](/docs/how_to/tool_calling/) capabilities:\n",
-    "\n",
-    "import ChatModelTabs from \"@theme/ChatModelTabs\";\n",
-    "\n",
-    "<ChatModelTabs customVarName=\"llm\" />\n"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 16,
-   "id": "af3123ad-7a02-40e5-b58e-7d56e23e5830",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "# | output: false\n",
-    "# | echo: false\n",
-    "\n",
-    "# !pip install -qU langchain langchain-openai\n",
-    "from langchain.chat_models import init_chat_model\n",
-    "\n",
-    "llm = init_chat_model(model=\"gpt-4o\", model_provider=\"openai\")"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "bea35fa1",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from langgraph.prebuilt import create_react_agent\n",
-    "\n",
-    "tools = [tool]\n",
-    "agent = create_react_agent(llm, tools)"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "id": "fdbf35b5-3aaf-4947-9ec6-48c21533fb95",
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "example_query = \"...\"\n",
-    "\n",
-    "events = agent.stream(\n",
-    "    {\"messages\": [(\"user\", example_query)]},\n",
-    "    stream_mode=\"values\",\n",
-    ")\n",
-    "for event in events:\n",
-    "    event[\"messages\"][-1].pretty_print()"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "id": "4ac8146c",
-   "metadata": {},
-   "source": [
-    "## API reference\n",
-    "\n",
-    "For detailed documentation of all __ModuleName__ features and configurations head to the API reference: https://python.langchain.com/v0.2/api_reference/community/tools/langchain_community.tools.__module_name__.tool.__ModuleName__.html"
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "poetry-venv-311",
-   "language": "python",
-   "name": "poetry-venv-311"
-  },
-  "language_info": {
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 3
-   },
-   "file_extension": ".py",
-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.11.9"
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 5
+  "nbformat": 4,
+  "nbformat_minor": 5
 }

libs/cli/langchain_cli/integration_template/docs/vectorstores.ipynb

@@ -295,7 +295,7 @@
    "source": [
     "## TODO: Any functionality specific to this vector store\n",
     "\n",
-    "E.g. creating a persisten database to save to your disk, etc."
+    "E.g. creating a persistent database to save to your disk, etc."
    ]
   },
   {

libs/cli/langchain_cli/integration_template/integration_template/chat_models.py

@@ -1,6 +1,6 @@
 """__ModuleName__ chat models."""
 
-from typing import Any, Dict, Iterator, List, Optional
+from typing import Any, Dict, Iterator, List
 
 from langchain_core.callbacks import (
     CallbackManagerForLLMRun,
@@ -26,30 +26,30 @@ class Chat__ModuleName__(BaseChatModel):
 
     # TODO: Replace with relevant packages, env vars.
     Setup:
-        Install ``__package_name__`` and set environment variable
-        ``__MODULE_NAME___API_KEY``.
+        Install `__package_name__` and set environment variable
+        `__MODULE_NAME___API_KEY`.
 
-        .. code-block:: bash
-
-            pip install -U __package_name__
-            export __MODULE_NAME___API_KEY="your-api-key"
+        ```bash
+        pip install -U __package_name__
+        export __MODULE_NAME___API_KEY="your-api-key"
+        ```
 
     # TODO: Populate with relevant params.
     Key init args — completion params:
-        model: str
+        model:
             Name of __ModuleName__ model to use.
-        temperature: float
+        temperature:
             Sampling temperature.
-        max_tokens: Optional[int]
+        max_tokens:
             Max number of tokens to generate.
 
     # TODO: Populate with relevant params.
     Key init args — client params:
-        timeout: Optional[float]
+        timeout:
             Timeout for requests.
-        max_retries: int
+        max_retries:
             Max number of retries.
-        api_key: Optional[str]
+        api_key:
             __ModuleName__ API key. If not passed in will be read from env var
             __MODULE_NAME___API_KEY.
 
@@ -57,226 +57,224 @@ class Chat__ModuleName__(BaseChatModel):
 
     # TODO: Replace with relevant init params.
     Instantiate:
-        .. code-block:: python
+        ```python
+        from __module_name__ import Chat__ModuleName__
 
-            from __module_name__ import Chat__ModuleName__
-
-            llm = Chat__ModuleName__(
-                model="...",
-                temperature=0,
-                max_tokens=None,
-                timeout=None,
-                max_retries=2,
-                # api_key="...",
-                # other params...
-            )
+        model = Chat__ModuleName__(
+            model="...",
+            temperature=0,
+            max_tokens=None,
+            timeout=None,
+            max_retries=2,
+            # api_key="...",
+            # other params...
+        )
+        ```
 
     Invoke:
-        .. code-block:: python
+        ```python
+        messages = [
+            ("system", "You are a helpful translator. Translate the user sentence to French."),
+            ("human", "I love programming."),
+        ]
+        model.invoke(messages)
+        ```
 
-            messages = [
-                ("system", "You are a helpful translator. Translate the user sentence to French."),
-                ("human", "I love programming."),
-            ]
-            llm.invoke(messages)
-
-        .. code-block:: python
-
-            # TODO: Example output.
+        ```python
+        # TODO: Example output.
+        ```
 
     # TODO: Delete if token-level streaming isn't supported.
     Stream:
-        .. code-block:: python
+        ```python
+        for chunk in model.stream(messages):
+            print(chunk.text, end="")
+        ```
 
-            for chunk in llm.stream(messages):
-                print(chunk.text, end="")
+        ```python
+        # TODO: Example output.
+        ```
 
-        .. code-block:: python
+        ```python
+        stream = model.stream(messages)
+        full = next(stream)
+        for chunk in stream:
+            full += chunk
+        full
+        ```
 
-            # TODO: Example output.
-
-        .. code-block:: python
-
-            stream = llm.stream(messages)
-            full = next(stream)
-            for chunk in stream:
-                full += chunk
-            full
-
-        .. code-block:: python
-
-            # TODO: Example output.
+        ```python
+        # TODO: Example output.
+        ```
 
     # TODO: Delete if native async isn't supported.
     Async:
-        .. code-block:: python
+        ```python
+        await model.ainvoke(messages)
 
-            await llm.ainvoke(messages)
+        # stream:
+        # async for chunk in (await model.astream(messages))
 
-            # stream:
-            # async for chunk in (await llm.astream(messages))
-
-            # batch:
-            # await llm.abatch([messages])
-
-        .. code-block:: python
-
-            # TODO: Example output.
+        # batch:
+        # await model.abatch([messages])
+        ```
 
+        ```python
+        # TODO: Example output.
+        ```
     # TODO: Delete if .bind_tools() isn't supported.
     Tool calling:
-        .. code-block:: python
+        ```python
+        from pydantic import BaseModel, Field
 
-            from pydantic import BaseModel, Field
+        class GetWeather(BaseModel):
+            '''Get the current weather in a given location'''
 
-            class GetWeather(BaseModel):
-                '''Get the current weather in a given location'''
+            location: str = Field(..., description="The city and state, e.g. San Francisco, CA")
 
-                location: str = Field(..., description="The city and state, e.g. San Francisco, CA")
+        class GetPopulation(BaseModel):
+            '''Get the current population in a given location'''
 
-            class GetPopulation(BaseModel):
-                '''Get the current population in a given location'''
+            location: str = Field(..., description="The city and state, e.g. San Francisco, CA")
 
-                location: str = Field(..., description="The city and state, e.g. San Francisco, CA")
+        model_with_tools = model.bind_tools([GetWeather, GetPopulation])
+        ai_msg = model_with_tools.invoke("Which city is hotter today and which is bigger: LA or NY?")
+        ai_msg.tool_calls
+        ```
 
-            llm_with_tools = llm.bind_tools([GetWeather, GetPopulation])
-            ai_msg = llm_with_tools.invoke("Which city is hotter today and which is bigger: LA or NY?")
-            ai_msg.tool_calls
+        ```python
+        # TODO: Example output.
+        ```
 
-        .. code-block:: python
-
-              # TODO: Example output.
-
-        See ``Chat__ModuleName__.bind_tools()`` method for more.
+        See `Chat__ModuleName__.bind_tools()` method for more.
 
     # TODO: Delete if .with_structured_output() isn't supported.
     Structured output:
-        .. code-block:: python
+        ```python
+        from typing import Optional
 
-            from typing import Optional
+        from pydantic import BaseModel, Field
 
-            from pydantic import BaseModel, Field
+        class Joke(BaseModel):
+            '''Joke to tell user.'''
 
-            class Joke(BaseModel):
-                '''Joke to tell user.'''
+            setup: str = Field(description="The setup of the joke")
+            punchline: str = Field(description="The punchline to the joke")
+            rating: int | None = Field(description="How funny the joke is, from 1 to 10")
 
-                setup: str = Field(description="The setup of the joke")
-                punchline: str = Field(description="The punchline to the joke")
-                rating: Optional[int] = Field(description="How funny the joke is, from 1 to 10")
+        structured_model = model.with_structured_output(Joke)
+        structured_model.invoke("Tell me a joke about cats")
+        ```
 
-            structured_llm = llm.with_structured_output(Joke)
-            structured_llm.invoke("Tell me a joke about cats")
+        ```python
+        # TODO: Example output.
+        ```
 
-        .. code-block:: python
-
-            # TODO: Example output.
-
-        See ``Chat__ModuleName__.with_structured_output()`` for more.
+        See `Chat__ModuleName__.with_structured_output()` for more.
 
     # TODO: Delete if JSON mode response format isn't supported.
     JSON mode:
-        .. code-block:: python
+        ```python
+        # TODO: Replace with appropriate bind arg.
+        json_model = model.bind(response_format={"type": "json_object"})
+        ai_msg = json_model.invoke("Return a JSON object with key 'random_ints' and a value of 10 random ints in [0-99]")
+        ai_msg.content
+        ```
 
-            # TODO: Replace with appropriate bind arg.
-            json_llm = llm.bind(response_format={"type": "json_object"})
-            ai_msg = json_llm.invoke("Return a JSON object with key 'random_ints' and a value of 10 random ints in [0-99]")
-            ai_msg.content
-
-        .. code-block:: python
-
-            # TODO: Example output.
+        ```python
+        # TODO: Example output.
+        ```
 
     # TODO: Delete if image inputs aren't supported.
     Image input:
-        .. code-block:: python
+        ```python
+        import base64
+        import httpx
+        from langchain_core.messages import HumanMessage
 
-            import base64
-            import httpx
-            from langchain_core.messages import HumanMessage
+        image_url = "https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gfp-wisconsin-madison-the-nature-boardwalk.jpg/2560px-Gfp-wisconsin-madison-the-nature-boardwalk.jpg"
+        image_data = base64.b64encode(httpx.get(image_url).content).decode("utf-8")
+        # TODO: Replace with appropriate message content format.
+        message = HumanMessage(
+            content=[
+                {"type": "text", "text": "describe the weather in this image"},
+                {
+                    "type": "image_url",
+                    "image_url": {"url": f"data:image/jpeg;base64,{image_data}"},
+                },
+            ],
+        )
+        ai_msg = model.invoke([message])
+        ai_msg.content
+        ```
 
-            image_url = "https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Gfp-wisconsin-madison-the-nature-boardwalk.jpg/2560px-Gfp-wisconsin-madison-the-nature-boardwalk.jpg"
-            image_data = base64.b64encode(httpx.get(image_url).content).decode("utf-8")
-            # TODO: Replace with appropriate message content format.
-            message = HumanMessage(
-                content=[
-                    {"type": "text", "text": "describe the weather in this image"},
-                    {
-                        "type": "image_url",
-                        "image_url": {"url": f"data:image/jpeg;base64,{image_data}"},
-                    },
-                ],
-            )
-            ai_msg = llm.invoke([message])
-            ai_msg.content
-
-        .. code-block:: python
-
-            # TODO: Example output.
+        ```python
+        # TODO: Example output.
+        ```
 
     # TODO: Delete if audio inputs aren't supported.
     Audio input:
-        .. code-block:: python
+        ```python
+        # TODO: Example input
+        ```
 
-            # TODO: Example input
-
-        .. code-block:: python
-
-            # TODO: Example output
+        ```python
+        # TODO: Example output
+        ```
 
     # TODO: Delete if video inputs aren't supported.
     Video input:
-        .. code-block:: python
+        ```python
+        # TODO: Example input
+        ```
 
-            # TODO: Example input
-
-        .. code-block:: python
-
-            # TODO: Example output
+        ```python
+        # TODO: Example output
+        ```
 
     # TODO: Delete if token usage metadata isn't supported.
     Token usage:
-        .. code-block:: python
+        ```python
+        ai_msg = model.invoke(messages)
+        ai_msg.usage_metadata
+        ```
 
-            ai_msg = llm.invoke(messages)
-            ai_msg.usage_metadata
-
-        .. code-block:: python
-
-            {'input_tokens': 28, 'output_tokens': 5, 'total_tokens': 33}
+        ```python
+        {'input_tokens': 28, 'output_tokens': 5, 'total_tokens': 33}
+        ```
 
     # TODO: Delete if logprobs aren't supported.
     Logprobs:
-        .. code-block:: python
-
-            # TODO: Replace with appropriate bind arg.
-            logprobs_llm = llm.bind(logprobs=True)
-            ai_msg = logprobs_llm.invoke(messages)
-            ai_msg.response_metadata["logprobs"]
-
-        .. code-block:: python
-
-              # TODO: Example output.
+        ```python
+        # TODO: Replace with appropriate bind arg.
+        logprobs_model = model.bind(logprobs=True)
+        ai_msg = logprobs_model.invoke(messages)
+        ai_msg.response_metadata["logprobs"]
+        ```
 
+        ```python
+        # TODO: Example output.
+        ```
     Response metadata
-        .. code-block:: python
+        ```python
+        ai_msg = model.invoke(messages)
+        ai_msg.response_metadata
+        ```
 
-            ai_msg = llm.invoke(messages)
-            ai_msg.response_metadata
-
-        .. code-block:: python
-
-             # TODO: Example output.
+        ```python
+        # TODO: Example output.
 
+        ```
     """  # noqa: E501
 
     model_name: str = Field(alias="model")
     """The name of the model"""
     parrot_buffer_length: int
     """The number of characters from the last message of the prompt to be echoed."""
-    temperature: Optional[float] = None
-    max_tokens: Optional[int] = None
-    timeout: Optional[int] = None
-    stop: Optional[List[str]] = None
+    temperature: float | None = None
+    max_tokens: int | None = None
+    timeout: int | None = None
+    stop: list[str] | None = None
     max_retries: int = 2
 
     @property
@@ -302,8 +300,8 @@ class Chat__ModuleName__(BaseChatModel):
     def _generate(
         self,
         messages: List[BaseMessage],
-        stop: Optional[List[str]] = None,
-        run_manager: Optional[CallbackManagerForLLMRun] = None,
+        stop: list[str] | None = None,
+        run_manager: CallbackManagerForLLMRun | None = None,
         **kwargs: Any,
     ) -> ChatResult:
         """Override the _generate method to implement the chat model logic.
@@ -314,11 +312,11 @@ class Chat__ModuleName__(BaseChatModel):
         Args:
             messages: the prompt composed of a list of messages.
             stop: a list of strings on which the model should stop generating.
-                  If generation stops due to a stop token, the stop token itself
-                  SHOULD BE INCLUDED as part of the output. This is not enforced
-                  across models right now, but it's a good practice to follow since
-                  it makes it much easier to parse the output of the model
-                  downstream and understand why generation stopped.
+                If generation stops due to a stop token, the stop token itself
+                SHOULD BE INCLUDED as part of the output. This is not enforced
+                across models right now, but it's a good practice to follow since
+                it makes it much easier to parse the output of the model
+                downstream and understand why generation stopped.
             run_manager: A run manager with callbacks for the LLM.
         """
         # Replace this with actual logic to generate a response from a list
@@ -348,8 +346,8 @@ class Chat__ModuleName__(BaseChatModel):
     def _stream(
         self,
         messages: List[BaseMessage],
-        stop: Optional[List[str]] = None,
-        run_manager: Optional[CallbackManagerForLLMRun] = None,
+        stop: list[str] | None = None,
+        run_manager: CallbackManagerForLLMRun | None = None,
         **kwargs: Any,
     ) -> Iterator[ChatGenerationChunk]:
         """Stream the output of the model.
@@ -362,11 +360,11 @@ class Chat__ModuleName__(BaseChatModel):
         Args:
             messages: the prompt composed of a list of messages.
             stop: a list of strings on which the model should stop generating.
-                  If generation stops due to a stop token, the stop token itself
-                  SHOULD BE INCLUDED as part of the output. This is not enforced
-                  across models right now, but it's a good practice to follow since
-                  it makes it much easier to parse the output of the model
-                  downstream and understand why generation stopped.
+                If generation stops due to a stop token, the stop token itself
+                SHOULD BE INCLUDED as part of the output. This is not enforced
+                across models right now, but it's a good practice to follow since
+                it makes it much easier to parse the output of the model
+                downstream and understand why generation stopped.
             run_manager: A run manager with callbacks for the LLM.
         """
         last_message = messages[-1]
@@ -410,8 +408,8 @@ class Chat__ModuleName__(BaseChatModel):
     # async def _astream(
     #     self,
     #     messages: List[BaseMessage],
-    #     stop: Optional[List[str]] = None,
-    #     run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
+    #     stop: list[str] | None = None,
+    #     run_manager: AsyncCallbackManagerForLLMRun | None = None,
     #     **kwargs: Any,
     # ) -> AsyncIterator[ChatGenerationChunk]:
 
@@ -419,7 +417,7 @@ class Chat__ModuleName__(BaseChatModel):
     # async def _agenerate(
     #     self,
     #     messages: List[BaseMessage],
-    #     stop: Optional[List[str]] = None,
-    #     run_manager: Optional[AsyncCallbackManagerForLLMRun] = None,
+    #     stop: list[str] | None = None,
+    #     run_manager: AsyncCallbackManagerForLLMRun | None = None,
     #     **kwargs: Any,
     # ) -> ChatResult:

libs/cli/langchain_cli/integration_template/integration_template/document_loaders.py

@@ -14,55 +14,55 @@ class __ModuleName__Loader(BaseLoader):
 
     # TODO: Replace with relevant packages, env vars.
     Setup:
-        Install ``__package_name__`` and set environment variable
-        ``__MODULE_NAME___API_KEY``.
+        Install `__package_name__` and set environment variable
+        `__MODULE_NAME___API_KEY`.
 
-        .. code-block:: bash
-
-            pip install -U __package_name__
-            export __MODULE_NAME___API_KEY="your-api-key"
+        ```bash
+        pip install -U __package_name__
+        export __MODULE_NAME___API_KEY="your-api-key"
+        ```
 
     # TODO: Replace with relevant init params.
     Instantiate:
-        .. code-block:: python
+        ```python
+        from langchain_community.document_loaders import __ModuleName__Loader
 
-            from langchain_community.document_loaders import __ModuleName__Loader
-
-            loader = __ModuleName__Loader(
-                # required params = ...
-                # other params = ...
-            )
+        loader = __ModuleName__Loader(
+            # required params = ...
+            # other params = ...
+        )
+        ```
 
     Lazy load:
-        .. code-block:: python
+        ```python
+        docs = []
+        docs_lazy = loader.lazy_load()
 
-            docs = []
-            docs_lazy = loader.lazy_load()
+        # async variant:
+        # docs_lazy = await loader.alazy_load()
 
-            # async variant:
-            # docs_lazy = await loader.alazy_load()
+        for doc in docs_lazy:
+            docs.append(doc)
+        print(docs[0].page_content[:100])
+        print(docs[0].metadata)
+        ```
 
-            for doc in docs_lazy:
-                docs.append(doc)
-            print(docs[0].page_content[:100])
-            print(docs[0].metadata)
-
-        .. code-block:: python
-
-            TODO: Example output
+        ```python
+        TODO: Example output
+        ```
 
     # TODO: Delete if async load is not implemented
     Async load:
-        .. code-block:: python
+        ```python
+        docs = await loader.aload()
+        print(docs[0].page_content[:100])
+        print(docs[0].metadata)
+        ```
 
-            docs = await loader.aload()
-            print(docs[0].page_content[:100])
-            print(docs[0].metadata)
-
-        .. code-block:: python
-
-            TODO: Example output
+        ```python
+        TODO: Example output
 
+        ```
     """
 
     # TODO: This method must be implemented to load documents.

libs/cli/langchain_cli/integration_template/integration_template/embeddings.py

@@ -8,13 +8,13 @@ class __ModuleName__Embeddings(Embeddings):
 
     # TODO: Replace with relevant packages, env vars.
     Setup:
-        Install ``__package_name__`` and set environment variable
-        ``__MODULE_NAME___API_KEY``.
+        Install `__package_name__` and set environment variable
+        `__MODULE_NAME___API_KEY`.
 
-        .. code-block:: bash
-
-            pip install -U __package_name__
-            export __MODULE_NAME___API_KEY="your-api-key"
+        ```bash
+        pip install -U __package_name__
+        export __MODULE_NAME___API_KEY="your-api-key"
+        ```
 
     # TODO: Populate with relevant params.
     Key init args — completion params:
@@ -25,50 +25,50 @@ class __ModuleName__Embeddings(Embeddings):
 
     # TODO: Replace with relevant init params.
     Instantiate:
-        .. code-block:: python
+        ```python
+        from __module_name__ import __ModuleName__Embeddings
 
-            from __module_name__ import __ModuleName__Embeddings
-
-            embed = __ModuleName__Embeddings(
-                model="...",
-                # api_key="...",
-                # other params...
-            )
+        embed = __ModuleName__Embeddings(
+            model="...",
+            # api_key="...",
+            # other params...
+        )
+        ```
 
     Embed single text:
-        .. code-block:: python
+        ```python
+        input_text = "The meaning of life is 42"
+        embed.embed_query(input_text)
+        ```
 
-            input_text = "The meaning of life is 42"
-            embed.embed_query(input_text)
-
-        .. code-block:: python
-
-            # TODO: Example output.
+        ```python
+        # TODO: Example output.
+        ```
 
     # TODO: Delete if token-level streaming isn't supported.
     Embed multiple text:
-        .. code-block:: python
+        ```python
+        input_texts = ["Document 1...", "Document 2..."]
+        embed.embed_documents(input_texts)
+        ```
 
-             input_texts = ["Document 1...", "Document 2..."]
-            embed.embed_documents(input_texts)
-
-        .. code-block:: python
-
-            # TODO: Example output.
+        ```python
+        # TODO: Example output.
+        ```
 
     # TODO: Delete if native async isn't supported.
     Async:
-        .. code-block:: python
+        ```python
+        await embed.aembed_query(input_text)
 
-            await embed.aembed_query(input_text)
+        # multiple:
+        # await embed.aembed_documents(input_texts)
+        ```
 
-            # multiple:
-            # await embed.aembed_documents(input_texts)
-
-        .. code-block:: python
-
-            # TODO: Example output.
+        ```python
+        # TODO: Example output.
 
+        ```
     """
 
     def __init__(self, model: str):

libs/cli/langchain_cli/integration_template/integration_template/retrievers.py

@@ -14,13 +14,13 @@ class __ModuleName__Retriever(BaseRetriever):
 
     # TODO: Replace with relevant packages, env vars, etc.
     Setup:
-        Install ``__package_name__`` and set environment variable
-        ``__MODULE_NAME___API_KEY``.
+        Install `__package_name__` and set environment variable
+        `__MODULE_NAME___API_KEY`.
 
-        .. code-block:: bash
-
-            pip install -U __package_name__
-            export __MODULE_NAME___API_KEY="your-api-key"
+        ```bash
+        pip install -U __package_name__
+        export __MODULE_NAME___API_KEY="your-api-key"
+        ```
 
     # TODO: Populate with relevant params.
     Key init args:
@@ -31,58 +31,58 @@ class __ModuleName__Retriever(BaseRetriever):
 
     # TODO: Replace with relevant init params.
     Instantiate:
-        .. code-block:: python
+        ```python
+        from __package_name__ import __ModuleName__Retriever
 
-            from __package_name__ import __ModuleName__Retriever
-
-            retriever = __ModuleName__Retriever(
-                # ...
-            )
+        retriever = __ModuleName__Retriever(
+            # ...
+        )
+        ```
 
     Usage:
-        .. code-block:: python
+        ```python
+        query = "..."
 
-            query = "..."
+        retriever.invoke(query)
+        ```
 
-            retriever.invoke(query)
-
-        .. code-block::
-
-            # TODO: Example output.
+        ```txt
+        # TODO: Example output.
+        ```
 
     Use within a chain:
-        .. code-block:: python
+        ```python
+        from langchain_core.output_parsers import StrOutputParser
+        from langchain_core.prompts import ChatPromptTemplate
+        from langchain_core.runnables import RunnablePassthrough
+        from langchain_openai import ChatOpenAI
 
-            from langchain_core.output_parsers import StrOutputParser
-            from langchain_core.prompts import ChatPromptTemplate
-            from langchain_core.runnables import RunnablePassthrough
-            from langchain_openai import ChatOpenAI
+        prompt = ChatPromptTemplate.from_template(
+            \"\"\"Answer the question based only on the context provided.
 
-            prompt = ChatPromptTemplate.from_template(
-                \"\"\"Answer the question based only on the context provided.
+        Context: {context}
 
-            Context: {context}
+        Question: {question}\"\"\"
+        )
 
-            Question: {question}\"\"\"
-            )
+        model = ChatOpenAI(model="gpt-3.5-turbo-0125")
 
-            llm = ChatOpenAI(model="gpt-3.5-turbo-0125")
+        def format_docs(docs):
+            return "\\n\\n".join(doc.page_content for doc in docs)
 
-            def format_docs(docs):
-                return "\\n\\n".join(doc.page_content for doc in docs)
+        chain = (
+            {"context": retriever | format_docs, "question": RunnablePassthrough()}
+            | prompt
+            | model
+            | StrOutputParser()
+        )
 
-            chain = (
-                {"context": retriever | format_docs, "question": RunnablePassthrough()}
-                | prompt
-                | llm
-                | StrOutputParser()
-            )
+        chain.invoke("...")
+        ```
 
-            chain.invoke("...")
-
-        .. code-block::
-
-             # TODO: Example output.
+        ```
+        # TODO: Example output.
+        ```
 
     """
 

libs/cli/langchain_cli/integration_template/integration_template/toolkits.py

@@ -12,13 +12,13 @@ class __ModuleName__Toolkit(BaseToolkit):
 
     # TODO: Replace with relevant packages, env vars, etc.
     Setup:
-        Install ``__package_name__`` and set environment variable
-        ``__MODULE_NAME___API_KEY``.
+        Install `__package_name__` and set environment variable
+        `__MODULE_NAME___API_KEY`.
 
-        .. code-block:: bash
-
-            pip install -U __package_name__
-            export __MODULE_NAME___API_KEY="your-api-key"
+        ```bash
+        pip install -U __package_name__
+        export __MODULE_NAME___API_KEY="your-api-key"
+        ```
 
     # TODO: Populate with relevant params.
     Key init args:
@@ -29,42 +29,42 @@ class __ModuleName__Toolkit(BaseToolkit):
 
     # TODO: Replace with relevant init params.
     Instantiate:
-        .. code-block:: python
+        ```python
+        from __package_name__ import __ModuleName__Toolkit
 
-            from __package_name__ import __ModuleName__Toolkit
-
-            toolkit = __ModuleName__Toolkit(
-                # ...
-            )
+        toolkit = __ModuleName__Toolkit(
+            # ...
+        )
+        ```
 
     Tools:
-        .. code-block:: python
+        ```python
+        toolkit.get_tools()
+        ```
 
-            toolkit.get_tools()
-
-        .. code-block::
-
-            # TODO: Example output.
+        ```txt
+        # TODO: Example output.
+        ```
 
     Use within an agent:
-        .. code-block:: python
+        ```python
+        from langgraph.prebuilt import create_react_agent
 
-            from langgraph.prebuilt import create_react_agent
+        agent_executor = create_react_agent(llm, tools)
 
-            agent_executor = create_react_agent(llm, tools)
+        example_query = "..."
 
-            example_query = "..."
+        events = agent_executor.stream(
+            {"messages": [("user", example_query)]},
+            stream_mode="values",
+        )
+        for event in events:
+            event["messages"][-1].pretty_print()
+        ```
 
-            events = agent_executor.stream(
-                {"messages": [("user", example_query)]},
-                stream_mode="values",
-            )
-            for event in events:
-                event["messages"][-1].pretty_print()
-
-        .. code-block::
-
-             # TODO: Example output.
+        ```txt
+        # TODO: Example output.
+        ```
 
     """
 

libs/cli/langchain_cli/integration_template/integration_template/tools.py

@@ -1,6 +1,6 @@
 """__ModuleName__ tools."""
 
-from typing import Optional, Type
+from typing import Type
 
 from langchain_core.callbacks import (
     CallbackManagerForToolRun,
@@ -27,42 +27,42 @@ class __ModuleName__Tool(BaseTool):  # type: ignore[override]
 
     Setup:
         # TODO: Replace with relevant packages, env vars.
-        Install ``__package_name__`` and set environment variable
-        ``__MODULE_NAME___API_KEY``.
+        Install `__package_name__` and set environment variable
+        `__MODULE_NAME___API_KEY`.
 
-        .. code-block:: bash
-
-            pip install -U __package_name__
-            export __MODULE_NAME___API_KEY="your-api-key"
+        ```bash
+        pip install -U __package_name__
+        export __MODULE_NAME___API_KEY="your-api-key"
+        ```
 
     Instantiation:
-        .. code-block:: python
-
-            tool = __ModuleName__Tool(
-                # TODO: init params
-            )
+        ```python
+        tool = __ModuleName__Tool(
+            # TODO: init params
+        )
+        ```
 
     Invocation with args:
-        .. code-block:: python
+        ```python
+        # TODO: invoke args
+        tool.invoke({...})
+        ```
 
-            # TODO: invoke args
-            tool.invoke({...})
-
-        .. code-block:: python
-
-            # TODO: output of invocation
+        ```python
+        # TODO: output of invocation
+        ```
 
     Invocation with ToolCall:
 
-        .. code-block:: python
+        ```python
+        # TODO: invoke args
+        tool.invoke({"args": {...}, "id": "1", "name": tool.name, "type": "tool_call"})
+        ```
 
-            # TODO: invoke args
-            tool.invoke({"args": {...}, "id": "1", "name": tool.name, "type": "tool_call"})
-
-        .. code-block:: python
-
-            # TODO: output of invocation
+        ```python
+        # TODO: output of invocation
 
+        ```
     """  # noqa: E501
 
     # TODO: Set tool name and description
@@ -74,12 +74,12 @@ class __ModuleName__Tool(BaseTool):  # type: ignore[override]
     """The schema that is passed to the model when performing tool calling."""
 
     # TODO: Add any other init params for the tool.
-    # param1: Optional[str]
+    # param1: str | None
     # """param1 determines foobar"""
 
     # TODO: Replaced (a, b) with real tool arguments.
     def _run(
-        self, a: int, b: int, *, run_manager: Optional[CallbackManagerForToolRun] = None
+        self, a: int, b: int, *, run_manager: CallbackManagerForToolRun | None = None
     ) -> str:
         return str(a + b + 80)
 
@@ -90,6 +90,6 @@ class __ModuleName__Tool(BaseTool):  # type: ignore[override]
     #     a: int,
     #     b: int,
     #     *,
-    #     run_manager: Optional[AsyncCallbackManagerForToolRun] = None,
+    #     run_manager: AsyncCallbackManagerForToolRun | None = None,
     # ) -> str:
     #     ...

libs/cli/langchain_cli/integration_template/integration_template/vectorstores.py

@@ -8,7 +8,6 @@ from typing import (
     Callable,
     Iterator,
     List,
-    Optional,
     Sequence,
     Tuple,
     Type,
@@ -29,133 +28,133 @@ class __ModuleName__VectorStore(VectorStore):
 
     # TODO: Replace with relevant packages, env vars.
     Setup:
-        Install ``__package_name__`` and set environment variable ``__MODULE_NAME___API_KEY``.
+        Install `__package_name__` and set environment variable `__MODULE_NAME___API_KEY`.
 
-        .. code-block:: bash
-
-            pip install -U __package_name__
-            export __MODULE_NAME___API_KEY="your-api-key"
+        ```bash
+        pip install -U __package_name__
+        export __MODULE_NAME___API_KEY="your-api-key"
+        ```
 
     # TODO: Populate with relevant params.
     Key init args — indexing params:
-        collection_name: str
+        collection_name:
             Name of the collection.
-        embedding_function: Embeddings
+        embedding_function:
             Embedding function to use.
 
     # TODO: Populate with relevant params.
     Key init args — client params:
-        client: Optional[Client]
+        client:
             Client to use.
-        connection_args: Optional[dict]
+        connection_args:
             Connection arguments.
 
     # TODO: Replace with relevant init params.
     Instantiate:
-        .. code-block:: python
+        ```python
+        from __module_name__.vectorstores import __ModuleName__VectorStore
+        from langchain_openai import OpenAIEmbeddings
 
-            from __module_name__.vectorstores import __ModuleName__VectorStore
-            from langchain_openai import OpenAIEmbeddings
-
-            vector_store = __ModuleName__VectorStore(
-                collection_name="foo",
-                embedding_function=OpenAIEmbeddings(),
-                connection_args={"uri": "./foo.db"},
-                # other params...
-            )
+        vector_store = __ModuleName__VectorStore(
+            collection_name="foo",
+            embedding_function=OpenAIEmbeddings(),
+            connection_args={"uri": "./foo.db"},
+            # other params...
+        )
+        ```
 
     # TODO: Populate with relevant variables.
     Add Documents:
-        .. code-block:: python
+        ```python
+        from langchain_core.documents import Document
 
-            from langchain_core.documents import Document
+        document_1 = Document(page_content="foo", metadata={"baz": "bar"})
+        document_2 = Document(page_content="thud", metadata={"bar": "baz"})
+        document_3 = Document(page_content="i will be deleted :(")
 
-            document_1 = Document(page_content="foo", metadata={"baz": "bar"})
-            document_2 = Document(page_content="thud", metadata={"bar": "baz"})
-            document_3 = Document(page_content="i will be deleted :(")
-
-            documents = [document_1, document_2, document_3]
-            ids = ["1", "2", "3"]
-            vector_store.add_documents(documents=documents, ids=ids)
+        documents = [document_1, document_2, document_3]
+        ids = ["1", "2", "3"]
+        vector_store.add_documents(documents=documents, ids=ids)
+        ```
 
     # TODO: Populate with relevant variables.
     Delete Documents:
-        .. code-block:: python
-
-            vector_store.delete(ids=["3"])
+        ```python
+        vector_store.delete(ids=["3"])
+        ```
 
     # TODO: Fill out with relevant variables and example output.
     Search:
-        .. code-block:: python
+        ```python
+        results = vector_store.similarity_search(query="thud",k=1)
+        for doc in results:
+            print(f"* {doc.page_content} [{doc.metadata}]")
+        ```
 
-            results = vector_store.similarity_search(query="thud",k=1)
-            for doc in results:
-                print(f"* {doc.page_content} [{doc.metadata}]")
-
-        .. code-block:: python
-
-            # TODO: Example output
+        ```python
+        # TODO: Example output
+        ```
 
     # TODO: Fill out with relevant variables and example output.
     Search with filter:
-        .. code-block:: python
+        ```python
+        results = vector_store.similarity_search(query="thud",k=1,filter={"bar": "baz"})
+        for doc in results:
+            print(f"* {doc.page_content} [{doc.metadata}]")
+        ```
 
-            results = vector_store.similarity_search(query="thud",k=1,filter={"bar": "baz"})
-            for doc in results:
-                print(f"* {doc.page_content} [{doc.metadata}]")
-
-        .. code-block:: python
-
-            # TODO: Example output
+        ```python
+        # TODO: Example output
+        ```
 
     # TODO: Fill out with relevant variables and example output.
     Search with score:
-        .. code-block:: python
+        ```python
+        results = vector_store.similarity_search_with_score(query="qux",k=1)
+        for doc, score in results:
+            print(f"* [SIM={score:3f}] {doc.page_content} [{doc.metadata}]")
+        ```
 
-            results = vector_store.similarity_search_with_score(query="qux",k=1)
-            for doc, score in results:
-                print(f"* [SIM={score:3f}] {doc.page_content} [{doc.metadata}]")
-
-        .. code-block:: python
-
-            # TODO: Example output
+        ```python
+        # TODO: Example output
+        ```
 
     # TODO: Fill out with relevant variables and example output.
     Async:
-        .. code-block:: python
+        ```python
+        # add documents
+        # await vector_store.aadd_documents(documents=documents, ids=ids)
 
-            # add documents
-            # await vector_store.aadd_documents(documents=documents, ids=ids)
+        # delete documents
+        # await vector_store.adelete(ids=["3"])
 
-            # delete documents
-            # await vector_store.adelete(ids=["3"])
+        # search
+        # results = vector_store.asimilarity_search(query="thud",k=1)
 
-            # search
-            # results = vector_store.asimilarity_search(query="thud",k=1)
+        # search with score
+        results = await vector_store.asimilarity_search_with_score(query="qux",k=1)
+        for doc,score in results:
+            print(f"* [SIM={score:3f}] {doc.page_content} [{doc.metadata}]")
+        ```
 
-            # search with score
-            results = await vector_store.asimilarity_search_with_score(query="qux",k=1)
-            for doc,score in results:
-                print(f"* [SIM={score:3f}] {doc.page_content} [{doc.metadata}]")
-
-        .. code-block:: python
-
-            # TODO: Example output
+        ```python
+        # TODO: Example output
+        ```
 
     # TODO: Fill out with relevant variables and example output.
     Use as Retriever:
-        .. code-block:: python
+        ```python
+        retriever = vector_store.as_retriever(
+            search_type="mmr",
+            search_kwargs={"k": 1, "fetch_k": 2, "lambda_mult": 0.5},
+        )
+        retriever.invoke("thud")
+        ```
 
-            retriever = vector_store.as_retriever(
-                search_type="mmr",
-                search_kwargs={"k": 1, "fetch_k": 2, "lambda_mult": 0.5},
-            )
-            retriever.invoke("thud")
-
-        .. code-block:: python
-
-            # TODO: Example output
+        ```python
+        # TODO: Example output
 
+        ```
     """  # noqa: E501
 
     def __init__(self, embedding: Embeddings) -> None:
@@ -172,7 +171,7 @@ class __ModuleName__VectorStore(VectorStore):
         cls: Type[__ModuleName__VectorStore],
         texts: List[str],
         embedding: Embeddings,
-        metadatas: Optional[List[dict]] = None,
+        metadatas: list[dict] | None = None,
         **kwargs: Any,
     ) -> __ModuleName__VectorStore:
         store = cls(
@@ -187,7 +186,7 @@ class __ModuleName__VectorStore(VectorStore):
     #     cls: Type[VST],
     #     texts: List[str],
     #     embedding: Embeddings,
-    #     metadatas: Optional[List[dict]] = None,
+    #     metadatas: list[dict] | None = None,
     #     **kwargs: Any,
     # ) -> VST:
     #     return await asyncio.get_running_loop().run_in_executor(
@@ -201,7 +200,7 @@ class __ModuleName__VectorStore(VectorStore):
     def add_documents(
         self,
         documents: List[Document],
-        ids: Optional[List[str]] = None,
+        ids: list[str] | None = None,
         **kwargs: Any,
     ) -> List[str]:
         """Add documents to the store."""
@@ -215,7 +214,7 @@ class __ModuleName__VectorStore(VectorStore):
             )
             raise ValueError(msg)
 
-        id_iterator: Iterator[Optional[str]] = (
+        id_iterator: Iterator[str | None] = (
             iter(ids) if ids else iter(doc.id for doc in documents)
         )
 
@@ -238,19 +237,19 @@ class __ModuleName__VectorStore(VectorStore):
     # async def aadd_documents(
     #     self,
     #     documents: List[Document],
-    #     ids: Optional[List[str]] = None,
+    #     ids: list[str] | None = None,
     #     **kwargs: Any,
     # ) -> List[str]:
     #     raise NotImplementedError
 
-    def delete(self, ids: Optional[List[str]] = None, **kwargs: Any) -> None:
+    def delete(self, ids: list[str] | None = None, **kwargs: Any) -> None:
         if ids:
             for _id in ids:
                 self._database.pop(_id, None)
 
     # optional: add custom async implementations
     # async def adelete(
-    #     self, ids: Optional[List[str]] = None, **kwargs: Any
+    #     self, ids: list[str] | None = None, **kwargs: Any
     # ) -> None:
     #     raise NotImplementedError
 
@@ -287,7 +286,7 @@ class __ModuleName__VectorStore(VectorStore):
         self,
         embedding: List[float],
         k: int = 4,
-        filter: Optional[Callable[[Document], bool]] = None,
+        filter: Callable[[Document], bool] | None = None,
         **kwargs: Any,
     ) -> List[tuple[Document, float, List[float]]]:
         # get all docs with fixed order in list

libs/cli/langchain_cli/namespaces/migrate/generate/partner.py

@@ -24,7 +24,7 @@ def get_migrations_for_partner_package(pkg_name: str) -> list[tuple[str, str]]:
     This code works
 
     Args:
-        pkg_name (str): The name of the partner package.
+        pkg_name: The name of the partner package.
 
     Returns:
         List of 2-tuples containing old and new import paths.

libs/cli/langchain_cli/namespaces/migrate/generate/utils.py

@@ -65,7 +65,7 @@ def is_subclass(class_obj: type, classes_: list[type]) -> bool:
         classes_: A list of classes to check against.
 
     Returns:
-        True if `class_obj` is a subclass of any class in `classes_`, False otherwise.
+        True if `class_obj` is a subclass of any class in `classes_`, `False` otherwise.
     """
     return any(
         issubclass(class_obj, kls)

libs/cli/langchain_cli/utils/git.py

@@ -182,7 +182,7 @@ def parse_dependencies(
     inner_branches = _list_arg_to_length(branch, num_deps)
 
     return list(
-        map(  # type: ignore[call-overload]
+        map(  # type: ignore[call-overload, unused-ignore]
             parse_dependency_string,
             inner_deps,
             inner_repos,

libs/cli/langchain_cli/utils/packages.py

@@ -13,7 +13,7 @@ def get_package_root(cwd: Path | None = None) -> Path:
 
     Args:
         cwd: The current working directory to start the search from.
-            If None, uses the current working directory of the process.
+            If `None`, uses the current working directory of the process.
 
     Returns:
         The path to the package root directory.

libs/cli/pyproject.toml

@@ -20,9 +20,13 @@ description = "CLI for interacting with LangChain"
 readme = "README.md"
 
 [project.urls]
-"Source Code" = "https://github.com/langchain-ai/langchain/tree/master/libs/cli"
-"Release Notes" = "https://github.com/langchain-ai/langchain/releases?q=tag%3A%22langchain-cli%3D%3D0%22&expanded=true"
-repository = "https://github.com/langchain-ai/langchain"
+Homepage = "https://docs.langchain.com/"
+Documentation = "https://docs.langchain.com/"
+Source = "https://github.com/langchain-ai/langchain/tree/master/libs/cli"
+Changelog = "https://github.com/langchain-ai/langchain/releases?q=%22langchain-cli%3D%3D1%22"
+Twitter = "https://x.com/LangChainAI"
+Slack = "https://www.langchain.com/join-community"
+Reddit = "https://www.reddit.com/r/LangChain/"
 
 [project.scripts]
 langchain = "langchain_cli.cli:app"
@@ -39,14 +43,14 @@ lint = [
 ]
 test = [
     "langchain-core",
-    "langchain"
+    "langchain-classic"
 ]
-typing = ["langchain"]
+typing = ["langchain-classic"]
 test_integration = []
 
 [tool.uv.sources]
 langchain-core = { path = "../core", editable = true }
-langchain = { path = "../langchain", editable = true }
+langchain-classic = { path = "../langchain", editable = true }
 
 [tool.ruff.format]
 docstring-code-format = true

libs/cli/tests/unit_tests/migrate/generate/test_langchain_migration.py

@@ -1,5 +1,5 @@
 import pytest
-from langchain._api import suppress_langchain_deprecation_warning as sup2
+from langchain_classic._api import suppress_langchain_deprecation_warning as sup2
 from langchain_core._api import suppress_langchain_deprecation_warning as sup1
 
 from langchain_cli.namespaces.migrate.generate.generic import (

libs/cli/uv.lock

@@ -327,7 +327,21 @@ wheels = [
 
 [[package]]
 name = "langchain"
-version = "0.3.27"
+version = "1.0.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "langchain-core" },
+    { name = "langgraph" },
+    { name = "pydantic" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/7d/b8/36078257ba52351608129ee983079a4d77ee69eb1470ee248cd8f5728a31/langchain-1.0.0.tar.gz", hash = "sha256:56bf90d935ac1dda864519372d195ca58757b755dd4c44b87840b67d069085b7", size = 466932, upload-time = "2025-10-17T20:53:20.319Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/c4/4d/2758a16ad01716c0fb3fe9ec205fd530eae4528b35a27ff44837c399e032/langchain-1.0.0-py3-none-any.whl", hash = "sha256:8c95e41250fc86d09a978fbdf999f86c18d50a28a2addc5da88546af00a1ad15", size = 106202, upload-time = "2025-10-17T20:53:18.685Z" },
+]
+
+[[package]]
+name = "langchain-classic"
+version = "1.0.0"
 source = { editable = "../langchain" }
 dependencies = [
     { name = "async-timeout", marker = "python_full_version < '3.11'" },
@@ -344,20 +358,28 @@ dependencies = [
 requires-dist = [
     { name = "async-timeout", marker = "python_full_version < '3.11'", specifier = ">=4.0.0,<5.0.0" },
     { name = "langchain-anthropic", marker = "extra == 'anthropic'" },
-    { name = "langchain-community", marker = "extra == 'community'" },
+    { name = "langchain-aws", marker = "extra == 'aws'" },
     { name = "langchain-core", editable = "../core" },
+    { name = "langchain-deepseek", marker = "extra == 'deepseek'" },
+    { name = "langchain-fireworks", marker = "extra == 'fireworks'" },
     { name = "langchain-google-genai", marker = "extra == 'google-genai'" },
     { name = "langchain-google-vertexai", marker = "extra == 'google-vertexai'" },
+    { name = "langchain-groq", marker = "extra == 'groq'" },
+    { name = "langchain-huggingface", marker = "extra == 'huggingface'" },
+    { name = "langchain-mistralai", marker = "extra == 'mistralai'" },
+    { name = "langchain-ollama", marker = "extra == 'ollama'" },
     { name = "langchain-openai", marker = "extra == 'openai'", editable = "../partners/openai" },
+    { name = "langchain-perplexity", marker = "extra == 'perplexity'" },
     { name = "langchain-text-splitters", editable = "../text-splitters" },
     { name = "langchain-together", marker = "extra == 'together'" },
+    { name = "langchain-xai", marker = "extra == 'xai'" },
     { name = "langsmith", specifier = ">=0.1.17,<1.0.0" },
     { name = "pydantic", specifier = ">=2.7.4,<3.0.0" },
     { name = "pyyaml", specifier = ">=5.3.0,<7.0.0" },
     { name = "requests", specifier = ">=2.0.0,<3.0.0" },
     { name = "sqlalchemy", specifier = ">=1.4.0,<3.0.0" },
 ]
-provides-extras = ["community", "anthropic", "openai", "google-vertexai", "google-genai", "together"]
+provides-extras = ["anthropic", "openai", "google-vertexai", "google-genai", "fireworks", "ollama", "together", "mistralai", "huggingface", "groq", "aws", "deepseek", "xai", "perplexity"]
 
 [package.metadata.requires-dev]
 dev = [
@@ -376,7 +398,6 @@ test = [
     { name = "blockbuster", specifier = ">=1.5.18,<1.6.0" },
     { name = "cffi", marker = "python_full_version < '3.10'", specifier = "<1.17.1" },
     { name = "cffi", marker = "python_full_version >= '3.10'" },
-    { name = "duckdb-engine", specifier = ">=0.9.2,<1.0.0" },
     { name = "freezegun", specifier = ">=1.2.2,<2.0.0" },
     { name = "langchain-core", editable = "../core" },
     { name = "langchain-openai", editable = "../partners/openai" },
@@ -411,9 +432,10 @@ test-integration = [
     { name = "wrapt", specifier = ">=1.15.0,<2.0.0" },
 ]
 typing = [
+    { name = "fastapi", specifier = ">=0.116.1,<1.0.0" },
     { name = "langchain-core", editable = "../core" },
     { name = "langchain-text-splitters", editable = "../text-splitters" },
-    { name = "mypy", specifier = ">=1.15.0,<1.16.0" },
+    { name = "mypy", specifier = ">=1.18.2,<1.19.0" },
     { name = "mypy-protobuf", specifier = ">=3.0.0,<4.0.0" },
     { name = "numpy", marker = "python_full_version < '3.13'", specifier = ">=1.26.4" },
     { name = "numpy", marker = "python_full_version >= '3.13'", specifier = ">=2.1.0" },
@@ -448,11 +470,11 @@ lint = [
     { name = "ruff" },
 ]
 test = [
-    { name = "langchain" },
+    { name = "langchain-classic" },
     { name = "langchain-core" },
 ]
 typing = [
-    { name = "langchain" },
+    { name = "langchain-classic" },
 ]
 
 [package.metadata]
@@ -475,15 +497,15 @@ lint = [
     { name = "ruff", specifier = ">=0.13.1,<0.14" },
 ]
 test = [
-    { name = "langchain", editable = "../langchain" },
+    { name = "langchain-classic", editable = "../langchain" },
     { name = "langchain-core", editable = "../core" },
 ]
 test-integration = []
-typing = [{ name = "langchain", editable = "../langchain" }]
+typing = [{ name = "langchain-classic", editable = "../langchain" }]
 
 [[package]]
 name = "langchain-core"
-version = "1.0.0a6"
+version = "1.0.0"
 source = { editable = "../core" }
 dependencies = [
     { name = "jsonpatch" },
@@ -541,7 +563,7 @@ typing = [
 
 [[package]]
 name = "langchain-text-splitters"
-version = "1.0.0a1"
+version = "1.0.0"
 source = { editable = "../text-splitters" }
 dependencies = [
     { name = "langchain-core" },
@@ -574,8 +596,8 @@ test-integration = [
     { name = "nltk", specifier = ">=3.9.1,<4.0.0" },
     { name = "scipy", marker = "python_full_version == '3.12.*'", specifier = ">=1.7.0,<2.0.0" },
     { name = "scipy", marker = "python_full_version >= '3.13'", specifier = ">=1.14.1,<2.0.0" },
-    { name = "sentence-transformers", specifier = ">=3.0.1,<4.0.0" },
-    { name = "spacy", specifier = ">=3.8.7,<4.0.0" },
+    { name = "sentence-transformers", marker = "python_full_version < '3.14'", specifier = ">=3.0.1,<4.0.0" },
+    { name = "spacy", marker = "python_full_version < '3.14'", specifier = ">=3.8.7,<4.0.0" },
     { name = "thinc", specifier = ">=8.3.6,<9.0.0" },
     { name = "tiktoken", specifier = ">=0.8.0,<1.0.0" },
     { name = "transformers", specifier = ">=4.51.3,<5.0.0" },
@@ -588,6 +610,62 @@ typing = [
     { name = "types-requests", specifier = ">=2.31.0.20240218,<3.0.0.0" },
 ]
 
+[[package]]
+name = "langgraph"
+version = "1.0.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "langchain-core" },
+    { name = "langgraph-checkpoint" },
+    { name = "langgraph-prebuilt" },
+    { name = "langgraph-sdk" },
+    { name = "pydantic" },
+    { name = "xxhash" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/57/f7/7ae10f1832ab1a6a402f451e54d6dab277e28e7d4e4204e070c7897ca71c/langgraph-1.0.0.tar.gz", hash = "sha256:5f83ed0e9bbcc37635bc49cbc9b3d9306605fa07504f955b7a871ed715f9964c", size = 472835, upload-time = "2025-10-17T20:23:38.263Z" }
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+]
+
+[[package]]
+name = "langgraph-checkpoint"
+version = "2.1.2"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "langchain-core" },
+    { name = "ormsgpack" },
+]
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+]
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+[[package]]
+name = "langgraph-prebuilt"
+version = "1.0.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "langchain-core" },
+    { name = "langgraph-checkpoint" },
+]
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+]
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+[[package]]
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+version = "0.2.9"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "httpx" },
+    { name = "orjson" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/23/d8/40e01190a73c564a4744e29a6c902f78d34d43dad9b652a363a92a67059c/langgraph_sdk-0.2.9.tar.gz", hash = "sha256:b3bd04c6be4fa382996cd2be8fbc1e7cc94857d2bc6b6f4599a7f2a245975303", size = 99802, upload-time = "2025-09-20T18:49:14.734Z" }
+wheels = [
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 [[package]]
 name = "langserve"
 version = "0.0.51"
@@ -780,6 +858,61 @@ wheels = [
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 ]
 
+[[package]]
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+version = "1.11.0"
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+
 [[package]]
 name = "zstandard"
 version = "0.25.0"

libs/core/README.md

@@ -1,7 +1,14 @@
 # 🦜🍎️ LangChain Core
 
-[![PyPI - License](https://img.shields.io/pypi/l/langchain-core?style=flat-square)](https://opensource.org/licenses/MIT)
+[![PyPI - Version](https://img.shields.io/pypi/v/langchain-core?label=%20)](https://pypi.org/project/langchain-core/#history)
+[![PyPI - License](https://img.shields.io/pypi/l/langchain-core)](https://opensource.org/licenses/MIT)
 [![PyPI - Downloads](https://img.shields.io/pepy/dt/langchain-core)](https://pypistats.org/packages/langchain-core)
+[![Twitter](https://img.shields.io/twitter/url/https/twitter.com/langchainai.svg?style=social&label=Follow%20%40LangChainAI)](https://twitter.com/langchainai)
+
+Looking for the JS/TS version? Check out [LangChain.js](https://github.com/langchain-ai/langchainjs).
+
+To help you ship LangChain apps to production faster, check out [LangSmith](https://smith.langchain.com).
+[LangSmith](https://smith.langchain.com) is a unified developer platform for building, testing, and monitoring LLM applications.
 
 ## Quick Install
 
@@ -9,16 +16,14 @@
 pip install langchain-core
 ```
 
-## What is it?
+## 🤔 What is this?
 
-LangChain Core contains the base abstractions that power the the LangChain ecosystem.
+LangChain Core contains the base abstractions that power the LangChain ecosystem.
 
 These abstractions are designed to be as modular and simple as possible.
 
 The benefit of having these abstractions is that any provider can implement the required interface and then easily be used in the rest of the LangChain ecosystem.
 
-For full documentation see the [API reference](https://reference.langchain.com/python/).
-
 ## ⛰️ Why build on top of LangChain Core?
 
 The LangChain ecosystem is built on top of `langchain-core`. Some of the benefits:
@@ -27,12 +32,16 @@ The LangChain ecosystem is built on top of `langchain-core`. Some of the benefit
 - **Stability**: We are committed to a stable versioning scheme, and will communicate any breaking changes with advance notice and version bumps.
 - **Battle-tested**: Core components have the largest install base in the LLM ecosystem, and are used in production by many companies.
 
+## 📖 Documentation
+
+For full documentation, see the [API reference](https://reference.langchain.com/python/langchain_core/).
+
 ## 📕 Releases & Versioning
 
-See our [Releases](https://docs.langchain.com/oss/python/release-policy) and [Versioning Policy](https://docs.langchain.com/oss/python/versioning).
+See our [Releases](https://docs.langchain.com/oss/python/release-policy) and [Versioning](https://docs.langchain.com/oss/python/versioning) policies.
 
 ## 💁 Contributing
 
 As an open-source project in a rapidly developing field, we are extremely open to contributions, whether it be in the form of a new feature, improved infrastructure, or better documentation.
 
-For detailed information on how to contribute, see the [Contributing Guide](https://docs.langchain.com/oss/python/contributing).
+For detailed information on how to contribute, see the [Contributing Guide](https://docs.langchain.com/oss/python/contributing/overview).

libs/core/langchain_core/__init__.py

@@ -1,4 +1,4 @@
-"""``langchain-core`` defines the base abstractions for the LangChain ecosystem.
+"""`langchain-core` defines the base abstractions for the LangChain ecosystem.
 
 The interfaces for core components like chat models, LLMs, vector stores, retrievers,
 and more are defined here. The universal invocation protocol (Runnables) along with

libs/core/langchain_core/_api/__init__.py

@@ -6,7 +6,6 @@ This module is only relevant for LangChain developers, not for users.
 
     This module and its submodules are for internal use only. Do not use them in your
     own code.  We may change the API at any time with no warning.
-
 """
 
 from typing import TYPE_CHECKING

libs/core/langchain_core/_api/beta_decorator.py

@@ -40,40 +40,37 @@ def beta(
     """Decorator to mark a function, a class, or a property as beta.
 
     When marking a classmethod, a staticmethod, or a property, the
-    ``@beta`` decorator should go *under* ``@classmethod`` and
-    ``@staticmethod`` (i.e., `beta` should directly decorate the
-    underlying callable), but *over* ``@property``.
+    `@beta` decorator should go *under* `@classmethod` and
+    `@staticmethod` (i.e., `beta` should directly decorate the
+    underlying callable), but *over* `@property`.
 
-    When marking a class ``C`` intended to be used as a base class in a
-    multiple inheritance hierarchy, ``C`` *must* define an ``__init__`` method
-    (if ``C`` instead inherited its ``__init__`` from its own base class, then
-    ``@beta`` would mess up ``__init__`` inheritance when installing its
-    own (annotation-emitting) ``C.__init__``).
+    When marking a class `C` intended to be used as a base class in a
+    multiple inheritance hierarchy, `C` *must* define an `__init__` method
+    (if `C` instead inherited its `__init__` from its own base class, then
+    `@beta` would mess up `__init__` inheritance when installing its
+    own (annotation-emitting) `C.__init__`).
 
     Args:
-        message : str, optional
+        message:
             Override the default beta message. The %(since)s,
             %(name)s, %(alternative)s, %(obj_type)s, %(addendum)s,
             and %(removal)s format specifiers will be replaced by the
             values of the respective arguments passed to this function.
-        name : str, optional
+        name:
             The name of the beta object.
-        obj_type : str, optional
+        obj_type:
             The object type being beta.
-        addendum : str, optional
+        addendum:
             Additional text appended directly to the final message.
 
     Returns:
         A decorator which can be used to mark functions or classes as beta.
 
-    Examples:
-
-        .. code-block:: python
-
-            @beta
-            def the_function_to_annotate():
-                pass
-
+    ```python
+    @beta
+    def the_function_to_annotate():
+        pass
+    ```
     """
 
     def beta(

libs/core/langchain_core/_api/deprecation.py

@@ -82,62 +82,59 @@ def deprecated(
     """Decorator to mark a function, a class, or a property as deprecated.
 
     When deprecating a classmethod, a staticmethod, or a property, the
-    ``@deprecated`` decorator should go *under* ``@classmethod`` and
-    ``@staticmethod`` (i.e., `deprecated` should directly decorate the
-    underlying callable), but *over* ``@property``.
+    `@deprecated` decorator should go *under* `@classmethod` and
+    `@staticmethod` (i.e., `deprecated` should directly decorate the
+    underlying callable), but *over* `@property`.
 
-    When deprecating a class ``C`` intended to be used as a base class in a
-    multiple inheritance hierarchy, ``C`` *must* define an ``__init__`` method
-    (if ``C`` instead inherited its ``__init__`` from its own base class, then
-    ``@deprecated`` would mess up ``__init__`` inheritance when installing its
-    own (deprecation-emitting) ``C.__init__``).
+    When deprecating a class `C` intended to be used as a base class in a
+    multiple inheritance hierarchy, `C` *must* define an `__init__` method
+    (if `C` instead inherited its `__init__` from its own base class, then
+    `@deprecated` would mess up `__init__` inheritance when installing its
+    own (deprecation-emitting) `C.__init__`).
 
     Parameters are the same as for `warn_deprecated`, except that *obj_type*
     defaults to 'class' if decorating a class, 'attribute' if decorating a
     property, and 'function' otherwise.
 
     Args:
-        since : str
+        since:
             The release at which this API became deprecated.
-        message : str, optional
+        message:
             Override the default deprecation message. The %(since)s,
             %(name)s, %(alternative)s, %(obj_type)s, %(addendum)s,
             and %(removal)s format specifiers will be replaced by the
             values of the respective arguments passed to this function.
-        name : str, optional
+        name:
             The name of the deprecated object.
-        alternative : str, optional
+        alternative:
             An alternative API that the user may use in place of the
             deprecated API. The deprecation warning will tell the user
             about this alternative if provided.
-        alternative_import: str, optional
+        alternative_import:
             An alternative import that the user may use instead.
-        pending : bool, optional
-            If True, uses a PendingDeprecationWarning instead of a
+        pending:
+            If `True`, uses a `PendingDeprecationWarning` instead of a
             DeprecationWarning. Cannot be used together with removal.
-        obj_type : str, optional
+        obj_type:
             The object type being deprecated.
-        addendum : str, optional
+        addendum:
             Additional text appended directly to the final message.
-        removal : str, optional
+        removal:
             The expected removal version. With the default (an empty
             string), a removal version is automatically computed from
             since. Set to other Falsy values to not schedule a removal
             date. Cannot be used together with pending.
-        package: str, optional
+        package:
             The package of the deprecated object.
 
     Returns:
         A decorator to mark a function or class as deprecated.
 
-    Examples:
-
-        .. code-block:: python
-
-            @deprecated("1.4.0")
-            def the_function_to_deprecate():
-                pass
-
+    ```python
+    @deprecated("1.4.0")
+    def the_function_to_deprecate():
+        pass
+    ```
     """
     _validate_deprecation_params(
         removal, alternative, alternative_import, pending=pending
@@ -372,7 +369,7 @@ def deprecated(
         components = [
             _message,
             f"Use {_alternative} instead." if _alternative else "",
-            f"Use ``{_alternative_import}`` instead." if _alternative_import else "",
+            f"Use `{_alternative_import}` instead." if _alternative_import else "",
             _addendum,
         ]
         details = " ".join([component.strip() for component in components if component])
@@ -440,7 +437,7 @@ def warn_deprecated(
         alternative_import:
             An alternative import that the user may use instead.
         pending:
-            If True, uses a PendingDeprecationWarning instead of a
+            If `True`, uses a `PendingDeprecationWarning` instead of a
             DeprecationWarning. Cannot be used together with removal.
         obj_type:
             The object type being deprecated.
@@ -550,12 +547,10 @@ def rename_parameter(
         A decorator indicating that a parameter was renamed.
 
     Example:
-
-        .. code-block:: python
-
-            @_api.rename_parameter("3.1", "bad_name", "good_name")
-            def func(good_name): ...
-
+        ```python
+        @_api.rename_parameter("3.1", "bad_name", "good_name")
+        def func(good_name): ...
+        ```
     """
 
     def decorator(f: Callable[_P, _R]) -> Callable[_P, _R]:

libs/core/langchain_core/_import_utils.py

@@ -13,7 +13,7 @@ def import_attr(
 
     Args:
         attr_name: The name of the attribute to import.
-        module_name: The name of the module to import from. If None, the attribute
+        module_name: The name of the module to import from. If `None`, the attribute
             is imported from the package itself.
         package: The name of the package where the module is located.
 

libs/core/langchain_core/agents.py

@@ -1,25 +1,24 @@
 """Schema definitions for representing agent actions, observations, and return values.
 
-**ATTENTION** The schema definitions are provided for backwards compatibility.
+!!! warning
+    The schema definitions are provided for backwards compatibility.
 
-!!! important
+!!! warning
     New agents should be built using the
-    [langgraph library](https://github.com/langchain-ai/langgraph), which provides a
+    [`langchain` library](https://pypi.org/project/langchain/), which provides a
     simpler and more flexible way to define agents.
 
-    Please see the
-    [migration guide](https://python.langchain.com/docs/how_to/migrate_agent/) for
-    information on how to migrate existing agents to modern langgraph agents.
+    See docs on [building agents](https://docs.langchain.com/oss/python/langchain/agents).
 
 Agents use language models to choose a sequence of actions to take.
 
 A basic agent works in the following manner:
 
 1. Given a prompt an agent uses an LLM to request an action to take
-   (e.g., a tool to run).
+    (e.g., a tool to run).
 2. The agent executes the action (e.g., runs the tool), and receives an observation.
 3. The agent returns the observation to the LLM, which can then be used to generate
-   the next action.
+    the next action.
 4. When the agent reaches a stopping condition, it returns a final return value.
 
 The schemas for the agents themselves are defined in langchain.agents.agent.
@@ -53,40 +52,42 @@ class AgentAction(Serializable):
     """The input to pass in to the Tool."""
     log: str
     """Additional information to log about the action.
-    This log can be used in a few ways. First, it can be used to audit
-    what exactly the LLM predicted to lead to this (tool, tool_input).
-    Second, it can be used in future iterations to show the LLMs prior
-    thoughts. This is useful when (tool, tool_input) does not contain
-    full information about the LLM prediction (for example, any `thought`
-    before the tool/tool_input)."""
+
+    This log can be used in a few ways. First, it can be used to audit what exactly the
+    LLM predicted to lead to this `(tool, tool_input)`.
+
+    Second, it can be used in future iterations to show the LLMs prior thoughts. This is
+    useful when `(tool, tool_input)` does not contain full information about the LLM
+    prediction (for example, any `thought` before the tool/tool_input).
+    """
     type: Literal["AgentAction"] = "AgentAction"
 
     # Override init to support instantiation by position for backward compat.
     def __init__(self, tool: str, tool_input: str | dict, log: str, **kwargs: Any):
-        """Create an AgentAction.
+        """Create an `AgentAction`.
 
         Args:
             tool: The name of the tool to execute.
-            tool_input: The input to pass in to the Tool.
+            tool_input: The input to pass in to the `Tool`.
             log: Additional information to log about the action.
         """
         super().__init__(tool=tool, tool_input=tool_input, log=log, **kwargs)
 
     @classmethod
     def is_lc_serializable(cls) -> bool:
-        """AgentAction is serializable.
+        """`AgentAction` is serializable.
 
         Returns:
-            True
+            `True`
         """
         return True
 
     @classmethod
     def get_lc_namespace(cls) -> list[str]:
-        """Get the namespace of the langchain object.
+        """Get the namespace of the LangChain object.
 
         Returns:
-            ``["langchain", "schema", "agent"]``
+            `["langchain", "schema", "agent"]`
         """
         return ["langchain", "schema", "agent"]
 
@@ -99,19 +100,23 @@ class AgentAction(Serializable):
 class AgentActionMessageLog(AgentAction):
     """Representation of an action to be executed by an agent.
 
-    This is similar to AgentAction, but includes a message log consisting of
-    chat messages. This is useful when working with ChatModels, and is used
-    to reconstruct conversation history from the agent's perspective.
+    This is similar to `AgentAction`, but includes a message log consisting of
+    chat messages.
+
+    This is useful when working with `ChatModels`, and is used to reconstruct
+    conversation history from the agent's perspective.
     """
 
     message_log: Sequence[BaseMessage]
-    """Similar to log, this can be used to pass along extra
-    information about what exact messages were predicted by the LLM
-    before parsing out the (tool, tool_input). This is again useful
-    if (tool, tool_input) cannot be used to fully recreate the LLM
-    prediction, and you need that LLM prediction (for future agent iteration).
+    """Similar to log, this can be used to pass along extra information about what exact
+    messages were predicted by the LLM before parsing out the `(tool, tool_input)`.
+
+    This is again useful if `(tool, tool_input)` cannot be used to fully recreate the
+    LLM prediction, and you need that LLM prediction (for future agent iteration).
+
     Compared to `log`, this is useful when the underlying LLM is a
-    ChatModel (and therefore returns messages rather than a string)."""
+    chat model (and therefore returns messages rather than a string).
+    """
     # Ignoring type because we're overriding the type from AgentAction.
     # And this is the correct thing to do in this case.
     # The type literal is used for serialization purposes.
@@ -119,12 +124,12 @@ class AgentActionMessageLog(AgentAction):
 
 
 class AgentStep(Serializable):
-    """Result of running an AgentAction."""
+    """Result of running an `AgentAction`."""
 
     action: AgentAction
-    """The AgentAction that was executed."""
+    """The `AgentAction` that was executed."""
     observation: Any
-    """The result of the AgentAction."""
+    """The result of the `AgentAction`."""
 
     @property
     def messages(self) -> Sequence[BaseMessage]:
@@ -133,19 +138,22 @@ class AgentStep(Serializable):
 
 
 class AgentFinish(Serializable):
-    """Final return value of an ActionAgent.
+    """Final return value of an `ActionAgent`.
 
-    Agents return an AgentFinish when they have reached a stopping condition.
+    Agents return an `AgentFinish` when they have reached a stopping condition.
     """
 
     return_values: dict
     """Dictionary of return values."""
     log: str
     """Additional information to log about the return value.
+
     This is used to pass along the full LLM prediction, not just the parsed out
-    return value. For example, if the full LLM prediction was
-    `Final Answer: 2` you may want to just return `2` as a return value, but pass
-    along the full string as a `log` (for debugging or observability purposes).
+    return value.
+
+    For example, if the full LLM prediction was `Final Answer: 2` you may want to just
+    return `2` as a return value, but pass along the full string as a `log` (for
+    debugging or observability purposes).
     """
     type: Literal["AgentFinish"] = "AgentFinish"
 
@@ -155,15 +163,15 @@ class AgentFinish(Serializable):
 
     @classmethod
     def is_lc_serializable(cls) -> bool:
-        """Return True as this class is serializable."""
+        """Return `True` as this class is serializable."""
         return True
 
     @classmethod
     def get_lc_namespace(cls) -> list[str]:
-        """Get the namespace of the langchain object.
+        """Get the namespace of the LangChain object.
 
         Returns:
-            ``["langchain", "schema", "agent"]``
+            `["langchain", "schema", "agent"]`
         """
         return ["langchain", "schema", "agent"]
 
@@ -203,7 +211,7 @@ def _convert_agent_observation_to_messages(
         observation: Observation to convert to a message.
 
     Returns:
-        AIMessage that corresponds to the original tool invocation.
+        `AIMessage` that corresponds to the original tool invocation.
     """
     if isinstance(agent_action, AgentActionMessageLog):
         return [_create_function_message(agent_action, observation)]
@@ -226,7 +234,7 @@ def _create_function_message(
         observation: the result of the tool invocation.
 
     Returns:
-        FunctionMessage that corresponds to the original tool invocation.
+        `FunctionMessage` that corresponds to the original tool invocation.
     """
     if not isinstance(observation, str):
         try:

libs/core/langchain_core/caches.py

@@ -1,24 +1,17 @@
-"""Cache classes.
+"""Optional caching layer for language models.
 
-!!! warning
-  Beta Feature!
+Distinct from provider-based [prompt caching](https://docs.langchain.com/oss/python/langchain/models#prompt-caching).
 
-**Cache** provides an optional caching layer for LLMs.
+!!! warning "Beta feature"
+    This is a beta feature. Please be wary of deploying experimental code to production
+    unless you've taken appropriate precautions.
 
-Cache is useful for two reasons:
+A cache is useful for two reasons:
 
-- It can save you money by reducing the number of API calls you make to the LLM
-  provider if you're often requesting the same completion multiple times.
-- It can speed up your application by reducing the number of API calls you make
-  to the LLM provider.
-
-Cache directly competes with Memory. See documentation for Pros and Cons.
-
-**Class hierarchy:**
-
-.. code-block::
-
-    BaseCache --> <name>Cache  # Examples: InMemoryCache, RedisCache, GPTCache
+1. It can save you money by reducing the number of API calls you make to the LLM
+    provider if you're often requesting the same completion multiple times.
+2. It can speed up your application by reducing the number of API calls you make to the
+    LLM provider.
 """
 
 from __future__ import annotations
@@ -40,8 +33,8 @@ class BaseCache(ABC):
 
     The cache interface consists of the following methods:
 
-    - lookup: Look up a value based on a prompt and llm_string.
-    - update: Update the cache based on a prompt and llm_string.
+    - lookup: Look up a value based on a prompt and `llm_string`.
+    - update: Update the cache based on a prompt and `llm_string`.
     - clear: Clear the cache.
 
     In addition, the cache interface provides an async version of each method.
@@ -53,43 +46,46 @@ class BaseCache(ABC):
 
     @abstractmethod
     def lookup(self, prompt: str, llm_string: str) -> RETURN_VAL_TYPE | None:
-        """Look up based on prompt and llm_string.
+        """Look up based on `prompt` and `llm_string`.
 
         A cache implementation is expected to generate a key from the 2-tuple
-        of prompt and llm_string (e.g., by concatenating them with a delimiter).
+        of `prompt` and `llm_string` (e.g., by concatenating them with a delimiter).
 
         Args:
-            prompt: a string representation of the prompt.
-                In the case of a Chat model, the prompt is a non-trivial
+            prompt: A string representation of the prompt.
+                In the case of a chat model, the prompt is a non-trivial
                 serialization of the prompt into the language model.
             llm_string: A string representation of the LLM configuration.
+
                 This is used to capture the invocation parameters of the LLM
                 (e.g., model name, temperature, stop tokens, max tokens, etc.).
-                These invocation parameters are serialized into a string
-                representation.
+
+                These invocation parameters are serialized into a string representation.
 
         Returns:
-            On a cache miss, return None. On a cache hit, return the cached value.
-            The cached value is a list of Generations (or subclasses).
+            On a cache miss, return `None`. On a cache hit, return the cached value.
+            The cached value is a list of `Generation` (or subclasses).
         """
 
     @abstractmethod
     def update(self, prompt: str, llm_string: str, return_val: RETURN_VAL_TYPE) -> None:
-        """Update cache based on prompt and llm_string.
+        """Update cache based on `prompt` and `llm_string`.
 
         The prompt and llm_string are used to generate a key for the cache.
         The key should match that of the lookup method.
 
         Args:
-            prompt: a string representation of the prompt.
-                In the case of a Chat model, the prompt is a non-trivial
+            prompt: A string representation of the prompt.
+                In the case of a chat model, the prompt is a non-trivial
                 serialization of the prompt into the language model.
             llm_string: A string representation of the LLM configuration.
+
                 This is used to capture the invocation parameters of the LLM
                 (e.g., model name, temperature, stop tokens, max tokens, etc.).
+
                 These invocation parameters are serialized into a string
                 representation.
-            return_val: The value to be cached. The value is a list of Generations
+            return_val: The value to be cached. The value is a list of `Generation`
                 (or subclasses).
         """
 
@@ -98,45 +94,49 @@ class BaseCache(ABC):
         """Clear cache that can take additional keyword arguments."""
 
     async def alookup(self, prompt: str, llm_string: str) -> RETURN_VAL_TYPE | None:
-        """Async look up based on prompt and llm_string.
+        """Async look up based on `prompt` and `llm_string`.
 
         A cache implementation is expected to generate a key from the 2-tuple
-        of prompt and llm_string (e.g., by concatenating them with a delimiter).
+        of `prompt` and `llm_string` (e.g., by concatenating them with a delimiter).
 
         Args:
-            prompt: a string representation of the prompt.
-                In the case of a Chat model, the prompt is a non-trivial
+            prompt: A string representation of the prompt.
+                In the case of a chat model, the prompt is a non-trivial
                 serialization of the prompt into the language model.
             llm_string: A string representation of the LLM configuration.
+
                 This is used to capture the invocation parameters of the LLM
                 (e.g., model name, temperature, stop tokens, max tokens, etc.).
+
                 These invocation parameters are serialized into a string
                 representation.
 
         Returns:
-            On a cache miss, return None. On a cache hit, return the cached value.
-            The cached value is a list of Generations (or subclasses).
+            On a cache miss, return `None`. On a cache hit, return the cached value.
+            The cached value is a list of `Generation` (or subclasses).
         """
         return await run_in_executor(None, self.lookup, prompt, llm_string)
 
     async def aupdate(
         self, prompt: str, llm_string: str, return_val: RETURN_VAL_TYPE
     ) -> None:
-        """Async update cache based on prompt and llm_string.
+        """Async update cache based on `prompt` and `llm_string`.
 
         The prompt and llm_string are used to generate a key for the cache.
         The key should match that of the look up method.
 
         Args:
-            prompt: a string representation of the prompt.
-                In the case of a Chat model, the prompt is a non-trivial
+            prompt: A string representation of the prompt.
+                In the case of a chat model, the prompt is a non-trivial
                 serialization of the prompt into the language model.
             llm_string: A string representation of the LLM configuration.
+
                 This is used to capture the invocation parameters of the LLM
                 (e.g., model name, temperature, stop tokens, max tokens, etc.).
+
                 These invocation parameters are serialized into a string
                 representation.
-            return_val: The value to be cached. The value is a list of Generations
+            return_val: The value to be cached. The value is a list of `Generation`
                 (or subclasses).
         """
         return await run_in_executor(None, self.update, prompt, llm_string, return_val)
@@ -154,12 +154,11 @@ class InMemoryCache(BaseCache):
 
         Args:
             maxsize: The maximum number of items to store in the cache.
-                If None, the cache has no maximum size.
+                If `None`, the cache has no maximum size.
                 If the cache exceeds the maximum size, the oldest items are removed.
-                Default is None.
 
         Raises:
-            ValueError: If maxsize is less than or equal to 0.
+            ValueError: If `maxsize` is less than or equal to `0`.
         """
         self._cache: dict[tuple[str, str], RETURN_VAL_TYPE] = {}
         if maxsize is not None and maxsize <= 0:
@@ -168,28 +167,28 @@ class InMemoryCache(BaseCache):
         self._maxsize = maxsize
 
     def lookup(self, prompt: str, llm_string: str) -> RETURN_VAL_TYPE | None:
-        """Look up based on prompt and llm_string.
+        """Look up based on `prompt` and `llm_string`.
 
         Args:
-            prompt: a string representation of the prompt.
-                In the case of a Chat model, the prompt is a non-trivial
+            prompt: A string representation of the prompt.
+                In the case of a chat model, the prompt is a non-trivial
                 serialization of the prompt into the language model.
             llm_string: A string representation of the LLM configuration.
 
         Returns:
-            On a cache miss, return None. On a cache hit, return the cached value.
+            On a cache miss, return `None`. On a cache hit, return the cached value.
         """
         return self._cache.get((prompt, llm_string), None)
 
     def update(self, prompt: str, llm_string: str, return_val: RETURN_VAL_TYPE) -> None:
-        """Update cache based on prompt and llm_string.
+        """Update cache based on `prompt` and `llm_string`.
 
         Args:
-            prompt: a string representation of the prompt.
-                In the case of a Chat model, the prompt is a non-trivial
+            prompt: A string representation of the prompt.
+                In the case of a chat model, the prompt is a non-trivial
                 serialization of the prompt into the language model.
             llm_string: A string representation of the LLM configuration.
-            return_val: The value to be cached. The value is a list of Generations
+            return_val: The value to be cached. The value is a list of `Generation`
                 (or subclasses).
         """
         if self._maxsize is not None and len(self._cache) == self._maxsize:
@@ -202,30 +201,30 @@ class InMemoryCache(BaseCache):
         self._cache = {}
 
     async def alookup(self, prompt: str, llm_string: str) -> RETURN_VAL_TYPE | None:
-        """Async look up based on prompt and llm_string.
+        """Async look up based on `prompt` and `llm_string`.
 
         Args:
-            prompt: a string representation of the prompt.
-                In the case of a Chat model, the prompt is a non-trivial
+            prompt: A string representation of the prompt.
+                In the case of a chat model, the prompt is a non-trivial
                 serialization of the prompt into the language model.
             llm_string: A string representation of the LLM configuration.
 
         Returns:
-            On a cache miss, return None. On a cache hit, return the cached value.
+            On a cache miss, return `None`. On a cache hit, return the cached value.
         """
         return self.lookup(prompt, llm_string)
 
     async def aupdate(
         self, prompt: str, llm_string: str, return_val: RETURN_VAL_TYPE
     ) -> None:
-        """Async update cache based on prompt and llm_string.
+        """Async update cache based on `prompt` and `llm_string`.
 
         Args:
-            prompt: a string representation of the prompt.
-                In the case of a Chat model, the prompt is a non-trivial
+            prompt: A string representation of the prompt.
+                In the case of a chat model, the prompt is a non-trivial
                 serialization of the prompt into the language model.
             llm_string: A string representation of the LLM configuration.
-            return_val: The value to be cached. The value is a list of Generations
+            return_val: The value to be cached. The value is a list of `Generation`
                 (or subclasses).
         """
         self.update(prompt, llm_string, return_val)

libs/core/langchain_core/callbacks/__init__.py

@@ -1,11 +1,4 @@
-"""**Callback handlers** allow listening to events in LangChain.
-
-**Class hierarchy:**
-
-.. code-block::
-
-    BaseCallbackHandler --> <name>CallbackHandler  # Example: AimCallbackHandler
-"""
+"""**Callback handlers** allow listening to events in LangChain."""
 
 from typing import TYPE_CHECKING
 

libs/core/langchain_core/callbacks/base.py

@@ -35,10 +35,10 @@ class RetrieverManagerMixin:
         """Run when Retriever errors.
 
         Args:
-            error (BaseException): The error that occurred.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            error: The error that occurred.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_retriever_end(
@@ -52,10 +52,10 @@ class RetrieverManagerMixin:
         """Run when Retriever ends running.
 
         Args:
-            documents (Sequence[Document]): The documents retrieved.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            documents: The documents retrieved.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
 
@@ -76,12 +76,11 @@ class LLMManagerMixin:
         For both chat models and non-chat models (legacy LLMs).
 
         Args:
-            token (str): The new token.
-            chunk (GenerationChunk | ChatGenerationChunk): The new generated chunk,
-              containing content and other information.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            token: The new token.
+            chunk: The new generated chunk, containing content and other information.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_llm_end(
@@ -95,10 +94,10 @@ class LLMManagerMixin:
         """Run when LLM ends running.
 
         Args:
-            response (LLMResult): The response which was generated.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            response: The response which was generated.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_llm_error(
@@ -112,10 +111,10 @@ class LLMManagerMixin:
         """Run when LLM errors.
 
         Args:
-            error (BaseException): The error that occurred.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            error: The error that occurred.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
 
@@ -133,10 +132,10 @@ class ChainManagerMixin:
         """Run when chain ends running.
 
         Args:
-            outputs (dict[str, Any]): The outputs of the chain.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            outputs: The outputs of the chain.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_chain_error(
@@ -150,10 +149,10 @@ class ChainManagerMixin:
         """Run when chain errors.
 
         Args:
-            error (BaseException): The error that occurred.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            error: The error that occurred.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_agent_action(
@@ -167,10 +166,10 @@ class ChainManagerMixin:
         """Run on agent action.
 
         Args:
-            action (AgentAction): The agent action.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            action: The agent action.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_agent_finish(
@@ -184,10 +183,10 @@ class ChainManagerMixin:
         """Run on the agent end.
 
         Args:
-            finish (AgentFinish): The agent finish.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            finish: The agent finish.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
 
@@ -205,10 +204,10 @@ class ToolManagerMixin:
         """Run when the tool ends running.
 
         Args:
-            output (Any): The output of the tool.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            output: The output of the tool.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_tool_error(
@@ -222,10 +221,10 @@ class ToolManagerMixin:
         """Run when tool errors.
 
         Args:
-            error (BaseException): The error that occurred.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            error: The error that occurred.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
 
@@ -248,16 +247,16 @@ class CallbackManagerMixin:
         !!! warning
             This method is called for non-chat models (regular LLMs). If you're
             implementing a handler for a chat model, you should use
-            ``on_chat_model_start`` instead.
+            `on_chat_model_start` instead.
 
         Args:
-            serialized (dict[str, Any]): The serialized LLM.
-            prompts (list[str]): The prompts.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            metadata (Optional[dict[str, Any]]): The metadata.
-            kwargs (Any): Additional keyword arguments.
+            serialized: The serialized LLM.
+            prompts: The prompts.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            metadata: The metadata.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_chat_model_start(
@@ -275,16 +274,16 @@ class CallbackManagerMixin:
 
         !!! warning
             This method is called for chat models. If you're implementing a handler for
-            a non-chat model, you should use ``on_llm_start`` instead.
+            a non-chat model, you should use `on_llm_start` instead.
 
         Args:
-            serialized (dict[str, Any]): The serialized chat model.
-            messages (list[list[BaseMessage]]): The messages.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            metadata (Optional[dict[str, Any]]): The metadata.
-            kwargs (Any): Additional keyword arguments.
+            serialized: The serialized chat model.
+            messages: The messages.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            metadata: The metadata.
+            **kwargs: Additional keyword arguments.
         """
         # NotImplementedError is thrown intentionally
         # Callback handler will fall back to on_llm_start if this is exception is thrown
@@ -305,13 +304,13 @@ class CallbackManagerMixin:
         """Run when the Retriever starts running.
 
         Args:
-            serialized (dict[str, Any]): The serialized Retriever.
-            query (str): The query.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            metadata (Optional[dict[str, Any]]): The metadata.
-            kwargs (Any): Additional keyword arguments.
+            serialized: The serialized Retriever.
+            query: The query.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            metadata: The metadata.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_chain_start(
@@ -328,13 +327,13 @@ class CallbackManagerMixin:
         """Run when a chain starts running.
 
         Args:
-            serialized (dict[str, Any]): The serialized chain.
-            inputs (dict[str, Any]): The inputs.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            metadata (Optional[dict[str, Any]]): The metadata.
-            kwargs (Any): Additional keyword arguments.
+            serialized: The serialized chain.
+            inputs: The inputs.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            metadata: The metadata.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_tool_start(
@@ -352,14 +351,14 @@ class CallbackManagerMixin:
         """Run when the tool starts running.
 
         Args:
-            serialized (dict[str, Any]): The serialized tool.
-            input_str (str): The input string.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            metadata (Optional[dict[str, Any]]): The metadata.
-            inputs (Optional[dict[str, Any]]): The inputs.
-            kwargs (Any): Additional keyword arguments.
+            serialized: The serialized chain.
+            input_str: The input string.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            metadata: The metadata.
+            inputs: The inputs.
+            **kwargs: Additional keyword arguments.
         """
 
 
@@ -377,10 +376,10 @@ class RunManagerMixin:
         """Run on an arbitrary text.
 
         Args:
-            text (str): The text.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            text: The text.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_retry(
@@ -394,10 +393,10 @@ class RunManagerMixin:
         """Run on a retry event.
 
         Args:
-            retry_state (RetryCallState): The retry state.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            retry_state: The retry state.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_custom_event(
@@ -415,14 +414,12 @@ class RunManagerMixin:
         Args:
             name: The name of the custom event.
             data: The data for the custom event. Format will match
-                  the format specified by the user.
+                the format specified by the user.
             run_id: The ID of the run.
             tags: The tags associated with the custom event
                 (includes inherited tags).
             metadata: The metadata associated with the custom event
                 (includes inherited metadata).
-
-        !!! version-added "Added in version 0.2.15"
         """
 
 
@@ -497,16 +494,16 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         !!! warning
             This method is called for non-chat models (regular LLMs). If you're
             implementing a handler for a chat model, you should use
-            ``on_chat_model_start`` instead.
+            `on_chat_model_start` instead.
 
         Args:
-            serialized (dict[str, Any]): The serialized LLM.
-            prompts (list[str]): The prompts.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            metadata (Optional[dict[str, Any]]): The metadata.
-            kwargs (Any): Additional keyword arguments.
+            serialized: The serialized LLM.
+            prompts: The prompts.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            metadata: The metadata.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_chat_model_start(
@@ -524,16 +521,16 @@ class AsyncCallbackHandler(BaseCallbackHandler):
 
         !!! warning
             This method is called for chat models. If you're implementing a handler for
-            a non-chat model, you should use ``on_llm_start`` instead.
+            a non-chat model, you should use `on_llm_start` instead.
 
         Args:
-            serialized (dict[str, Any]): The serialized chat model.
-            messages (list[list[BaseMessage]]): The messages.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            metadata (Optional[dict[str, Any]]): The metadata.
-            kwargs (Any): Additional keyword arguments.
+            serialized: The serialized chat model.
+            messages: The messages.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            metadata: The metadata.
+            **kwargs: Additional keyword arguments.
         """
         # NotImplementedError is thrown intentionally
         # Callback handler will fall back to on_llm_start if this is exception is thrown
@@ -555,13 +552,12 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         For both chat models and non-chat models (legacy LLMs).
 
         Args:
-            token (str): The new token.
-            chunk (GenerationChunk | ChatGenerationChunk): The new generated chunk,
-              containing content and other information.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            kwargs (Any): Additional keyword arguments.
+            token: The new token.
+            chunk: The new generated chunk, containing content and other information.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_llm_end(
@@ -576,11 +572,11 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run when the model ends running.
 
         Args:
-            response (LLMResult): The response which was generated.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            kwargs (Any): Additional keyword arguments.
+            response: The response which was generated.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_llm_error(
@@ -599,7 +595,7 @@ class AsyncCallbackHandler(BaseCallbackHandler):
             run_id: The run ID. This is the ID of the current run.
             parent_run_id: The parent run ID. This is the ID of the parent run.
             tags: The tags.
-            kwargs (Any): Additional keyword arguments.
+            **kwargs: Additional keyword arguments.
                 - response (LLMResult): The response which was generated before
                     the error occurred.
         """
@@ -618,13 +614,13 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run when a chain starts running.
 
         Args:
-            serialized (dict[str, Any]): The serialized chain.
-            inputs (dict[str, Any]): The inputs.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            metadata (Optional[dict[str, Any]]): The metadata.
-            kwargs (Any): Additional keyword arguments.
+            serialized: The serialized chain.
+            inputs: The inputs.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            metadata: The metadata.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_chain_end(
@@ -639,11 +635,11 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run when a chain ends running.
 
         Args:
-            outputs (dict[str, Any]): The outputs of the chain.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            kwargs (Any): Additional keyword arguments.
+            outputs: The outputs of the chain.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_chain_error(
@@ -658,11 +654,11 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run when chain errors.
 
         Args:
-            error (BaseException): The error that occurred.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            kwargs (Any): Additional keyword arguments.
+            error: The error that occurred.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_tool_start(
@@ -680,14 +676,14 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run when the tool starts running.
 
         Args:
-            serialized (dict[str, Any]): The serialized tool.
-            input_str (str): The input string.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            metadata (Optional[dict[str, Any]]): The metadata.
-            inputs (Optional[dict[str, Any]]): The inputs.
-            kwargs (Any): Additional keyword arguments.
+            serialized: The serialized tool.
+            input_str: The input string.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            metadata: The metadata.
+            inputs: The inputs.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_tool_end(
@@ -702,11 +698,11 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run when the tool ends running.
 
         Args:
-            output (Any): The output of the tool.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            kwargs (Any): Additional keyword arguments.
+            output: The output of the tool.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_tool_error(
@@ -721,11 +717,11 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run when tool errors.
 
         Args:
-            error (BaseException): The error that occurred.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            kwargs (Any): Additional keyword arguments.
+            error: The error that occurred.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_text(
@@ -740,11 +736,11 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run on an arbitrary text.
 
         Args:
-            text (str): The text.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            kwargs (Any): Additional keyword arguments.
+            text: The text.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_retry(
@@ -758,10 +754,10 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run on a retry event.
 
         Args:
-            retry_state (RetryCallState): The retry state.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            kwargs (Any): Additional keyword arguments.
+            retry_state: The retry state.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_agent_action(
@@ -776,11 +772,11 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run on agent action.
 
         Args:
-            action (AgentAction): The agent action.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            kwargs (Any): Additional keyword arguments.
+            action: The agent action.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_agent_finish(
@@ -795,11 +791,11 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run on the agent end.
 
         Args:
-            finish (AgentFinish): The agent finish.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            kwargs (Any): Additional keyword arguments.
+            finish: The agent finish.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_retriever_start(
@@ -816,13 +812,13 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run on the retriever start.
 
         Args:
-            serialized (dict[str, Any]): The serialized retriever.
-            query (str): The query.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            metadata (Optional[dict[str, Any]]): The metadata.
-            kwargs (Any): Additional keyword arguments.
+            serialized: The serialized retriever.
+            query: The query.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            metadata: The metadata.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_retriever_end(
@@ -837,11 +833,11 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run on the retriever end.
 
         Args:
-            documents (Sequence[Document]): The documents retrieved.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            kwargs (Any): Additional keyword arguments.
+            documents: The documents retrieved.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_retriever_error(
@@ -856,11 +852,11 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         """Run on retriever error.
 
         Args:
-            error (BaseException): The error that occurred.
-            run_id (UUID): The run ID. This is the ID of the current run.
-            parent_run_id (UUID): The parent run ID. This is the ID of the parent run.
-            tags (Optional[list[str]]): The tags.
-            kwargs (Any): Additional keyword arguments.
+            error: The error that occurred.
+            run_id: The run ID. This is the ID of the current run.
+            parent_run_id: The parent run ID. This is the ID of the parent run.
+            tags: The tags.
+            **kwargs: Additional keyword arguments.
         """
 
     async def on_custom_event(
@@ -878,14 +874,12 @@ class AsyncCallbackHandler(BaseCallbackHandler):
         Args:
             name: The name of the custom event.
             data: The data for the custom event. Format will match
-                  the format specified by the user.
+                the format specified by the user.
             run_id: The ID of the run.
             tags: The tags associated with the custom event
                 (includes inherited tags).
             metadata: The metadata associated with the custom event
                 (includes inherited metadata).
-
-        !!! version-added "Added in version 0.2.15"
         """
 
 
@@ -906,16 +900,13 @@ class BaseCallbackManager(CallbackManagerMixin):
         """Initialize callback manager.
 
         Args:
-            handlers (list[BaseCallbackHandler]): The handlers.
-            inheritable_handlers (Optional[list[BaseCallbackHandler]]):
-              The inheritable handlers. Default is None.
-            parent_run_id (Optional[UUID]): The parent run ID. Default is None.
-            tags (Optional[list[str]]): The tags. Default is None.
-            inheritable_tags (Optional[list[str]]): The inheritable tags.
-                Default is None.
-            metadata (Optional[dict[str, Any]]): The metadata. Default is None.
-            inheritable_metadata (Optional[dict[str, Any]]): The inheritable metadata.
-                Default is None.
+            handlers: The handlers.
+            inheritable_handlers: The inheritable handlers.
+            parent_run_id: The parent run ID.
+            tags: The tags.
+            inheritable_tags: The inheritable tags.
+            metadata: The metadata.
+            inheritable_metadata: The inheritable metadata.
         """
         self.handlers: list[BaseCallbackHandler] = handlers
         self.inheritable_handlers: list[BaseCallbackHandler] = (
@@ -946,35 +937,29 @@ class BaseCallbackManager(CallbackManagerMixin):
         within merge_configs.
 
         Returns:
-            BaseCallbackManager: The merged callback manager of the same type
-                as the current object.
+            The merged callback manager of the same type as the current object.
 
         Example: Merging two callback managers.
 
-            .. code-block:: python
+            ```python
+            from langchain_core.callbacks.manager import (
+                CallbackManager,
+                trace_as_chain_group,
+            )
+            from langchain_core.callbacks.stdout import StdOutCallbackHandler
 
-                from langchain_core.callbacks.manager import (
-                    CallbackManager,
-                    trace_as_chain_group,
-                )
-                from langchain_core.callbacks.stdout import StdOutCallbackHandler
-
-                manager = CallbackManager(
-                    handlers=[StdOutCallbackHandler()], tags=["tag2"]
-                )
-                with trace_as_chain_group(
-                    "My Group Name", tags=["tag1"]
-                ) as group_manager:
-                    merged_manager = group_manager.merge(manager)
-                    print(merged_manager.handlers)
-                    # [
-                    #    <langchain_core.callbacks.stdout.StdOutCallbackHandler object at ...>,
-                    #    <langchain_core.callbacks.streaming_stdout.StreamingStdOutCallbackHandler object at ...>,
-                    # ]
-
-                    print(merged_manager.tags)
-                    #    ['tag2', 'tag1']
+            manager = CallbackManager(handlers=[StdOutCallbackHandler()], tags=["tag2"])
+            with trace_as_chain_group("My Group Name", tags=["tag1"]) as group_manager:
+                merged_manager = group_manager.merge(manager)
+                print(merged_manager.handlers)
+                # [
+                #    <langchain_core.callbacks.stdout.StdOutCallbackHandler object at ...>,
+                #    <langchain_core.callbacks.streaming_stdout.StreamingStdOutCallbackHandler object at ...>,
+                # ]
 
+                print(merged_manager.tags)
+                #    ['tag2', 'tag1']
+            ```
         """  # noqa: E501
         manager = self.__class__(
             parent_run_id=self.parent_run_id or other.parent_run_id,
@@ -1011,8 +996,8 @@ class BaseCallbackManager(CallbackManagerMixin):
         """Add a handler to the callback manager.
 
         Args:
-            handler (BaseCallbackHandler): The handler to add.
-            inherit (bool): Whether to inherit the handler. Default is True.
+            handler: The handler to add.
+            inherit: Whether to inherit the handler.
         """
         if handler not in self.handlers:
             self.handlers.append(handler)
@@ -1023,7 +1008,7 @@ class BaseCallbackManager(CallbackManagerMixin):
         """Remove a handler from the callback manager.
 
         Args:
-            handler (BaseCallbackHandler): The handler to remove.
+            handler: The handler to remove.
         """
         if handler in self.handlers:
             self.handlers.remove(handler)
@@ -1038,8 +1023,8 @@ class BaseCallbackManager(CallbackManagerMixin):
         """Set handlers as the only handlers on the callback manager.
 
         Args:
-            handlers (list[BaseCallbackHandler]): The handlers to set.
-            inherit (bool): Whether to inherit the handlers. Default is True.
+            handlers: The handlers to set.
+            inherit: Whether to inherit the handlers.
         """
         self.handlers = []
         self.inheritable_handlers = []
@@ -1054,8 +1039,8 @@ class BaseCallbackManager(CallbackManagerMixin):
         """Set handler as the only handler on the callback manager.
 
         Args:
-            handler (BaseCallbackHandler): The handler to set.
-            inherit (bool): Whether to inherit the handler. Default is True.
+            handler: The handler to set.
+            inherit: Whether to inherit the handler.
         """
         self.set_handlers([handler], inherit=inherit)
 
@@ -1067,8 +1052,8 @@ class BaseCallbackManager(CallbackManagerMixin):
         """Add tags to the callback manager.
 
         Args:
-            tags (list[str]): The tags to add.
-            inherit (bool): Whether to inherit the tags. Default is True.
+            tags: The tags to add.
+            inherit: Whether to inherit the tags.
         """
         for tag in tags:
             if tag in self.tags:
@@ -1081,7 +1066,7 @@ class BaseCallbackManager(CallbackManagerMixin):
         """Remove tags from the callback manager.
 
         Args:
-            tags (list[str]): The tags to remove.
+            tags: The tags to remove.
         """
         for tag in tags:
             if tag in self.tags:
@@ -1097,8 +1082,8 @@ class BaseCallbackManager(CallbackManagerMixin):
         """Add metadata to the callback manager.
 
         Args:
-            metadata (dict[str, Any]): The metadata to add.
-            inherit (bool): Whether to inherit the metadata. Default is True.
+            metadata: The metadata to add.
+            inherit: Whether to inherit the metadata.
         """
         self.metadata.update(metadata)
         if inherit:
@@ -1108,7 +1093,7 @@ class BaseCallbackManager(CallbackManagerMixin):
         """Remove metadata from the callback manager.
 
         Args:
-            keys (list[str]): The keys to remove.
+            keys: The keys to remove.
         """
         for key in keys:
             self.metadata.pop(key, None)

libs/core/langchain_core/callbacks/file.py

@@ -27,32 +27,32 @@ class FileCallbackHandler(BaseCallbackHandler):
     Examples:
         Using as a context manager (recommended):
 
-        .. code-block:: python
-
-            with FileCallbackHandler("output.txt") as handler:
-                # Use handler with your chain/agent
-                chain.invoke(inputs, config={"callbacks": [handler]})
+        ```python
+        with FileCallbackHandler("output.txt") as handler:
+            # Use handler with your chain/agent
+            chain.invoke(inputs, config={"callbacks": [handler]})
+        ```
 
         Direct instantiation (deprecated):
 
-        .. code-block:: python
-
-            handler = FileCallbackHandler("output.txt")
-            # File remains open until handler is garbage collected
-            try:
-                chain.invoke(inputs, config={"callbacks": [handler]})
-            finally:
-                handler.close()  # Explicit cleanup recommended
+        ```python
+        handler = FileCallbackHandler("output.txt")
+        # File remains open until handler is garbage collected
+        try:
+            chain.invoke(inputs, config={"callbacks": [handler]})
+        finally:
+            handler.close()  # Explicit cleanup recommended
+        ```
 
     Args:
         filename: The file path to write to.
-        mode: The file open mode. Defaults to ``'a'`` (append).
-        color: Default color for text output. Defaults to ``None``.
+        mode: The file open mode. Defaults to `'a'` (append).
+        color: Default color for text output.
 
     !!! note
         When not used as a context manager, a deprecation warning will be issued
-        on first use. The file will be opened immediately in ``__init__`` and closed
-        in ``__del__`` or when ``close()`` is called explicitly.
+        on first use. The file will be opened immediately in `__init__` and closed
+        in `__del__` or when `close()` is called explicitly.
 
     """
 
@@ -63,8 +63,8 @@ class FileCallbackHandler(BaseCallbackHandler):
 
         Args:
             filename: Path to the output file.
-            mode: File open mode (e.g., ``'w'``, ``'a'``, ``'x'``). Defaults to ``'a'``.
-            color: Default text color for output. Defaults to ``None``.
+            mode: File open mode (e.g., `'w'`, `'a'`, `'x'`). Defaults to `'a'`.
+            color: Default text color for output.
 
         """
         self.filename = filename
@@ -84,7 +84,7 @@ class FileCallbackHandler(BaseCallbackHandler):
             The FileCallbackHandler instance.
 
         !!! note
-            The file is already opened in ``__init__``, so this just marks that
+            The file is already opened in `__init__`, so this just marks that
             the handler is being used as a context manager.
 
         """
@@ -131,9 +131,9 @@ class FileCallbackHandler(BaseCallbackHandler):
 
         Args:
             text: The text to write to the file.
-            color: Optional color for the text. Defaults to ``self.color``.
-            end: String appended after the text. Defaults to ``""``.
-            file: Optional file to write to. Defaults to ``self.file``.
+            color: Optional color for the text. Defaults to `self.color`.
+            end: String appended after the text.
+            file: Optional file to write to. Defaults to `self.file`.
 
         Raises:
             RuntimeError: If the file is closed or not available.
@@ -167,7 +167,7 @@ class FileCallbackHandler(BaseCallbackHandler):
         Args:
             serialized: The serialized chain information.
             inputs: The inputs to the chain.
-            **kwargs: Additional keyword arguments that may contain ``'name'``.
+            **kwargs: Additional keyword arguments that may contain `'name'`.
 
         """
         name = (
@@ -196,8 +196,8 @@ class FileCallbackHandler(BaseCallbackHandler):
 
         Args:
             action: The agent action containing the log to write.
-            color: Color override for this specific output. If ``None``, uses
-                ``self.color``.
+            color: Color override for this specific output. If `None`, uses
+                `self.color`.
             **kwargs: Additional keyword arguments.
 
         """
@@ -216,8 +216,8 @@ class FileCallbackHandler(BaseCallbackHandler):
 
         Args:
             output: The tool output to write.
-            color: Color override for this specific output. If ``None``, uses
-                ``self.color``.
+            color: Color override for this specific output. If `None`, uses
+                `self.color`.
             observation_prefix: Optional prefix to write before the output.
             llm_prefix: Optional prefix to write after the output.
             **kwargs: Additional keyword arguments.
@@ -237,9 +237,9 @@ class FileCallbackHandler(BaseCallbackHandler):
 
         Args:
             text: The text to write.
-            color: Color override for this specific output. If ``None``, uses
-                ``self.color``.
-            end: String appended after the text. Defaults to ``""``.
+            color: Color override for this specific output. If `None`, uses
+                `self.color`.
+            end: String appended after the text.
             **kwargs: Additional keyword arguments.
 
         """
@@ -253,8 +253,8 @@ class FileCallbackHandler(BaseCallbackHandler):
 
         Args:
             finish: The agent finish object containing the log to write.
-            color: Color override for this specific output. If ``None``, uses
-                ``self.color``.
+            color: Color override for this specific output. If `None`, uses
+                `self.color`.
             **kwargs: Additional keyword arguments.
 
         """

libs/core/langchain_core/callbacks/stdout.py

@@ -20,7 +20,7 @@ class StdOutCallbackHandler(BaseCallbackHandler):
         """Initialize callback handler.
 
         Args:
-            color: The color to use for the text. Defaults to None.
+            color: The color to use for the text.
         """
         self.color = color
 
@@ -31,9 +31,9 @@ class StdOutCallbackHandler(BaseCallbackHandler):
         """Print out that we are entering a chain.
 
         Args:
-            serialized (dict[str, Any]): The serialized chain.
-            inputs (dict[str, Any]): The inputs to the chain.
-            **kwargs (Any): Additional keyword arguments.
+            serialized: The serialized chain.
+            inputs: The inputs to the chain.
+            **kwargs: Additional keyword arguments.
         """
         if "name" in kwargs:
             name = kwargs["name"]
@@ -48,8 +48,8 @@ class StdOutCallbackHandler(BaseCallbackHandler):
         """Print out that we finished a chain.
 
         Args:
-            outputs (dict[str, Any]): The outputs of the chain.
-            **kwargs (Any): Additional keyword arguments.
+            outputs: The outputs of the chain.
+            **kwargs: Additional keyword arguments.
         """
         print("\n\033[1m> Finished chain.\033[0m")  # noqa: T201
 
@@ -60,9 +60,9 @@ class StdOutCallbackHandler(BaseCallbackHandler):
         """Run on agent action.
 
         Args:
-            action (AgentAction): The agent action.
-            color (Optional[str]): The color to use for the text. Defaults to None.
-            **kwargs (Any): Additional keyword arguments.
+            action: The agent action.
+            color: The color to use for the text.
+            **kwargs: Additional keyword arguments.
         """
         print_text(action.log, color=color or self.color)
 
@@ -78,12 +78,11 @@ class StdOutCallbackHandler(BaseCallbackHandler):
         """If not the final action, print out observation.
 
         Args:
-            output (Any): The output to print.
-            color (Optional[str]): The color to use for the text. Defaults to None.
-            observation_prefix (Optional[str]): The observation prefix.
-                Defaults to None.
-            llm_prefix (Optional[str]): The LLM prefix. Defaults to None.
-            **kwargs (Any): Additional keyword arguments.
+            output: The output to print.
+            color: The color to use for the text.
+            observation_prefix: The observation prefix.
+            llm_prefix: The LLM prefix.
+            **kwargs: Additional keyword arguments.
         """
         output = str(output)
         if observation_prefix is not None:
@@ -103,10 +102,10 @@ class StdOutCallbackHandler(BaseCallbackHandler):
         """Run when the agent ends.
 
         Args:
-            text (str): The text to print.
-            color (Optional[str]): The color to use for the text. Defaults to None.
-            end (str): The end character to use. Defaults to "".
-            **kwargs (Any): Additional keyword arguments.
+            text: The text to print.
+            color: The color to use for the text.
+            end: The end character to use.
+            **kwargs: Additional keyword arguments.
         """
         print_text(text, color=color or self.color, end=end)
 
@@ -117,8 +116,8 @@ class StdOutCallbackHandler(BaseCallbackHandler):
         """Run on the agent end.
 
         Args:
-            finish (AgentFinish): The agent finish.
-            color (Optional[str]): The color to use for the text. Defaults to None.
-            **kwargs (Any): Additional keyword arguments.
+            finish: The agent finish.
+            color: The color to use for the text.
+            **kwargs: Additional keyword arguments.
         """
         print_text(finish.log, color=color or self.color, end="\n")

libs/core/langchain_core/callbacks/streaming_stdout.py

@@ -24,9 +24,9 @@ class StreamingStdOutCallbackHandler(BaseCallbackHandler):
         """Run when LLM starts running.
 
         Args:
-            serialized (dict[str, Any]): The serialized LLM.
-            prompts (list[str]): The prompts to run.
-            **kwargs (Any): Additional keyword arguments.
+            serialized: The serialized LLM.
+            prompts: The prompts to run.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_chat_model_start(
@@ -38,9 +38,9 @@ class StreamingStdOutCallbackHandler(BaseCallbackHandler):
         """Run when LLM starts running.
 
         Args:
-            serialized (dict[str, Any]): The serialized LLM.
-            messages (list[list[BaseMessage]]): The messages to run.
-            **kwargs (Any): Additional keyword arguments.
+            serialized: The serialized LLM.
+            messages: The messages to run.
+            **kwargs: Additional keyword arguments.
         """
 
     @override
@@ -48,8 +48,8 @@ class StreamingStdOutCallbackHandler(BaseCallbackHandler):
         """Run on new LLM token. Only available when streaming is enabled.
 
         Args:
-            token (str): The new token.
-            **kwargs (Any): Additional keyword arguments.
+            token: The new token.
+            **kwargs: Additional keyword arguments.
         """
         sys.stdout.write(token)
         sys.stdout.flush()
@@ -58,16 +58,16 @@ class StreamingStdOutCallbackHandler(BaseCallbackHandler):
         """Run when LLM ends running.
 
         Args:
-            response (LLMResult): The response from the LLM.
-            **kwargs (Any): Additional keyword arguments.
+            response: The response from the LLM.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_llm_error(self, error: BaseException, **kwargs: Any) -> None:
         """Run when LLM errors.
 
         Args:
-            error (BaseException): The error that occurred.
-            **kwargs (Any): Additional keyword arguments.
+            error: The error that occurred.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_chain_start(
@@ -76,25 +76,25 @@ class StreamingStdOutCallbackHandler(BaseCallbackHandler):
         """Run when a chain starts running.
 
         Args:
-            serialized (dict[str, Any]): The serialized chain.
-            inputs (dict[str, Any]): The inputs to the chain.
-            **kwargs (Any): Additional keyword arguments.
+            serialized: The serialized chain.
+            inputs: The inputs to the chain.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_chain_end(self, outputs: dict[str, Any], **kwargs: Any) -> None:
         """Run when a chain ends running.
 
         Args:
-            outputs (dict[str, Any]): The outputs of the chain.
-            **kwargs (Any): Additional keyword arguments.
+            outputs: The outputs of the chain.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_chain_error(self, error: BaseException, **kwargs: Any) -> None:
         """Run when chain errors.
 
         Args:
-            error (BaseException): The error that occurred.
-            **kwargs (Any): Additional keyword arguments.
+            error: The error that occurred.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_tool_start(
@@ -103,47 +103,47 @@ class StreamingStdOutCallbackHandler(BaseCallbackHandler):
         """Run when the tool starts running.
 
         Args:
-            serialized (dict[str, Any]): The serialized tool.
-            input_str (str): The input string.
-            **kwargs (Any): Additional keyword arguments.
+            serialized: The serialized tool.
+            input_str: The input string.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_agent_action(self, action: AgentAction, **kwargs: Any) -> Any:
         """Run on agent action.
 
         Args:
-            action (AgentAction): The agent action.
-            **kwargs (Any): Additional keyword arguments.
+            action: The agent action.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_tool_end(self, output: Any, **kwargs: Any) -> None:
         """Run when tool ends running.
 
         Args:
-            output (Any): The output of the tool.
-            **kwargs (Any): Additional keyword arguments.
+            output: The output of the tool.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_tool_error(self, error: BaseException, **kwargs: Any) -> None:
         """Run when tool errors.
 
         Args:
-            error (BaseException): The error that occurred.
-            **kwargs (Any): Additional keyword arguments.
+            error: The error that occurred.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_text(self, text: str, **kwargs: Any) -> None:
         """Run on an arbitrary text.
 
         Args:
-            text (str): The text to print.
-            **kwargs (Any): Additional keyword arguments.
+            text: The text to print.
+            **kwargs: Additional keyword arguments.
         """
 
     def on_agent_finish(self, finish: AgentFinish, **kwargs: Any) -> None:
         """Run on the agent end.
 
         Args:
-            finish (AgentFinish): The agent finish.
-            **kwargs (Any): Additional keyword arguments.
+            finish: The agent finish.
+            **kwargs: Additional keyword arguments.
         """

libs/core/langchain_core/callbacks/usage.py

@@ -19,32 +19,31 @@ class UsageMetadataCallbackHandler(BaseCallbackHandler):
     """Callback Handler that tracks AIMessage.usage_metadata.
 
     Example:
-        .. code-block:: python
+        ```python
+        from langchain.chat_models import init_chat_model
+        from langchain_core.callbacks import UsageMetadataCallbackHandler
 
-            from langchain.chat_models import init_chat_model
-            from langchain_core.callbacks import UsageMetadataCallbackHandler
+        llm_1 = init_chat_model(model="openai:gpt-4o-mini")
+        llm_2 = init_chat_model(model="anthropic:claude-3-5-haiku-20241022")
 
-            llm_1 = init_chat_model(model="openai:gpt-4o-mini")
-            llm_2 = init_chat_model(model="anthropic:claude-3-5-haiku-latest")
+        callback = UsageMetadataCallbackHandler()
+        result_1 = llm_1.invoke("Hello", config={"callbacks": [callback]})
+        result_2 = llm_2.invoke("Hello", config={"callbacks": [callback]})
+        callback.usage_metadata
+        ```
+        ```txt
+        {'gpt-4o-mini-2024-07-18': {'input_tokens': 8,
+          'output_tokens': 10,
+          'total_tokens': 18,
+          'input_token_details': {'audio': 0, 'cache_read': 0},
+          'output_token_details': {'audio': 0, 'reasoning': 0}},
+         'claude-3-5-haiku-20241022': {'input_tokens': 8,
+          'output_tokens': 21,
+          'total_tokens': 29,
+          'input_token_details': {'cache_read': 0, 'cache_creation': 0}}}
+        ```
 
-            callback = UsageMetadataCallbackHandler()
-            result_1 = llm_1.invoke("Hello", config={"callbacks": [callback]})
-            result_2 = llm_2.invoke("Hello", config={"callbacks": [callback]})
-            callback.usage_metadata
-
-        .. code-block::
-
-            {'gpt-4o-mini-2024-07-18': {'input_tokens': 8,
-              'output_tokens': 10,
-              'total_tokens': 18,
-              'input_token_details': {'audio': 0, 'cache_read': 0},
-              'output_token_details': {'audio': 0, 'reasoning': 0}},
-             'claude-3-5-haiku-20241022': {'input_tokens': 8,
-              'output_tokens': 21,
-              'total_tokens': 29,
-              'input_token_details': {'cache_read': 0, 'cache_creation': 0}}}
-
-    !!! version-added "Added in version 0.3.49"
+    !!! version-added "Added in `langchain-core` 0.3.49"
 
     """
 
@@ -96,42 +95,46 @@ def get_usage_metadata_callback(
     """Get usage metadata callback.
 
     Get context manager for tracking usage metadata across chat model calls using
-    ``AIMessage.usage_metadata``.
+    `AIMessage.usage_metadata`.
 
     Args:
-        name (str): The name of the context variable. Defaults to
-            ``'usage_metadata_callback'``.
+        name: The name of the context variable.
 
     Yields:
         The usage metadata callback.
 
     Example:
-        .. code-block:: python
+        ```python
+        from langchain.chat_models import init_chat_model
+        from langchain_core.callbacks import get_usage_metadata_callback
 
-            from langchain.chat_models import init_chat_model
-            from langchain_core.callbacks import get_usage_metadata_callback
+        llm_1 = init_chat_model(model="openai:gpt-4o-mini")
+        llm_2 = init_chat_model(model="anthropic:claude-3-5-haiku-20241022")
 
-            llm_1 = init_chat_model(model="openai:gpt-4o-mini")
-            llm_2 = init_chat_model(model="anthropic:claude-3-5-haiku-latest")
+        with get_usage_metadata_callback() as cb:
+            llm_1.invoke("Hello")
+            llm_2.invoke("Hello")
+            print(cb.usage_metadata)
+        ```
+        ```txt
+        {
+            "gpt-4o-mini-2024-07-18": {
+                "input_tokens": 8,
+                "output_tokens": 10,
+                "total_tokens": 18,
+                "input_token_details": {"audio": 0, "cache_read": 0},
+                "output_token_details": {"audio": 0, "reasoning": 0},
+            },
+            "claude-3-5-haiku-20241022": {
+                "input_tokens": 8,
+                "output_tokens": 21,
+                "total_tokens": 29,
+                "input_token_details": {"cache_read": 0, "cache_creation": 0},
+            },
+        }
+        ```
 
-            with get_usage_metadata_callback() as cb:
-                llm_1.invoke("Hello")
-                llm_2.invoke("Hello")
-                print(cb.usage_metadata)
-
-        .. code-block::
-
-            {'gpt-4o-mini-2024-07-18': {'input_tokens': 8,
-              'output_tokens': 10,
-              'total_tokens': 18,
-              'input_token_details': {'audio': 0, 'cache_read': 0},
-              'output_token_details': {'audio': 0, 'reasoning': 0}},
-             'claude-3-5-haiku-20241022': {'input_tokens': 8,
-              'output_tokens': 21,
-              'total_tokens': 29,
-              'input_token_details': {'cache_read': 0, 'cache_creation': 0}}}
-
-    !!! version-added "Added in version 0.3.49"
+    !!! version-added "Added in `langchain-core` 0.3.49"
 
     """
     usage_metadata_callback_var: ContextVar[UsageMetadataCallbackHandler | None] = (

libs/core/langchain_core/chat_history.py

@@ -1,18 +1,4 @@
-"""**Chat message history** stores a history of the message interactions in a chat.
-
-**Class hierarchy:**
-
-.. code-block::
-
-    BaseChatMessageHistory --> <name>ChatMessageHistory  # Examples: FileChatMessageHistory, PostgresChatMessageHistory
-
-**Main helpers:**
-
-.. code-block::
-
-    AIMessage, HumanMessage, BaseMessage
-
-"""  # noqa: E501
+"""**Chat message history** stores a history of the message interactions in a chat."""
 
 from __future__ import annotations
 
@@ -63,46 +49,45 @@ class BaseChatMessageHistory(ABC):
 
     Example: Shows a default implementation.
 
-        .. code-block:: python
-
-            import json
-            import os
-            from langchain_core.messages import messages_from_dict, message_to_dict
+        ```python
+        import json
+        import os
+        from langchain_core.messages import messages_from_dict, message_to_dict
 
 
-            class FileChatMessageHistory(BaseChatMessageHistory):
-                storage_path: str
-                session_id: str
+        class FileChatMessageHistory(BaseChatMessageHistory):
+            storage_path: str
+            session_id: str
 
-                @property
-                def messages(self) -> list[BaseMessage]:
-                    try:
-                        with open(
-                            os.path.join(self.storage_path, self.session_id),
-                            "r",
-                            encoding="utf-8",
-                        ) as f:
-                            messages_data = json.load(f)
-                        return messages_from_dict(messages_data)
-                    except FileNotFoundError:
-                        return []
+            @property
+            def messages(self) -> list[BaseMessage]:
+                try:
+                    with open(
+                        os.path.join(self.storage_path, self.session_id),
+                        "r",
+                        encoding="utf-8",
+                    ) as f:
+                        messages_data = json.load(f)
+                    return messages_from_dict(messages_data)
+                except FileNotFoundError:
+                    return []
 
-                def add_messages(self, messages: Sequence[BaseMessage]) -> None:
-                    all_messages = list(self.messages)  # Existing messages
-                    all_messages.extend(messages)  # Add new messages
+            def add_messages(self, messages: Sequence[BaseMessage]) -> None:
+                all_messages = list(self.messages)  # Existing messages
+                all_messages.extend(messages)  # Add new messages
 
-                    serialized = [message_to_dict(message) for message in all_messages]
-                    file_path = os.path.join(self.storage_path, self.session_id)
-                    os.makedirs(os.path.dirname(file_path), exist_ok=True)
-                    with open(file_path, "w", encoding="utf-8") as f:
-                        json.dump(serialized, f)
-
-                def clear(self) -> None:
-                    file_path = os.path.join(self.storage_path, self.session_id)
-                    os.makedirs(os.path.dirname(file_path), exist_ok=True)
-                    with open(file_path, "w", encoding="utf-8") as f:
-                        json.dump([], f)
+                serialized = [message_to_dict(message) for message in all_messages]
+                file_path = os.path.join(self.storage_path, self.session_id)
+                os.makedirs(os.path.dirname(file_path), exist_ok=True)
+                with open(file_path, "w", encoding="utf-8") as f:
+                    json.dump(serialized, f)
 
+            def clear(self) -> None:
+                file_path = os.path.join(self.storage_path, self.session_id)
+                os.makedirs(os.path.dirname(file_path), exist_ok=True)
+                with open(file_path, "w", encoding="utf-8") as f:
+                    json.dump([], f)
+        ```
     """
 
     messages: list[BaseMessage]
@@ -130,13 +115,13 @@ class BaseChatMessageHistory(ABC):
         """Convenience method for adding a human message string to the store.
 
         !!! note
-            This is a convenience method. Code should favor the bulk ``add_messages``
+            This is a convenience method. Code should favor the bulk `add_messages`
             interface instead to save on round-trips to the persistence layer.
 
         This method may be deprecated in a future release.
 
         Args:
-            message: The human message to add to the store.
+            message: The `HumanMessage` to add to the store.
         """
         if isinstance(message, HumanMessage):
             self.add_message(message)
@@ -144,16 +129,16 @@ class BaseChatMessageHistory(ABC):
             self.add_message(HumanMessage(content=message))
 
     def add_ai_message(self, message: AIMessage | str) -> None:
-        """Convenience method for adding an AI message string to the store.
+        """Convenience method for adding an `AIMessage` string to the store.
 
         !!! note
-            This is a convenience method. Code should favor the bulk ``add_messages``
+            This is a convenience method. Code should favor the bulk `add_messages`
             interface instead to save on round-trips to the persistence layer.
 
         This method may be deprecated in a future release.
 
         Args:
-            message: The AI message to add.
+            message: The `AIMessage` to add.
         """
         if isinstance(message, AIMessage):
             self.add_message(message)
@@ -168,7 +153,7 @@ class BaseChatMessageHistory(ABC):
 
         Raises:
             NotImplementedError: If the sub-class has not implemented an efficient
-                add_messages method.
+                `add_messages` method.
         """
         if type(self).add_messages != BaseChatMessageHistory.add_messages:
             # This means that the sub-class has implemented an efficient add_messages
@@ -188,7 +173,7 @@ class BaseChatMessageHistory(ABC):
         in an efficient manner to avoid unnecessary round-trips to the underlying store.
 
         Args:
-            messages: A sequence of BaseMessage objects to store.
+            messages: A sequence of `BaseMessage` objects to store.
         """
         for message in messages:
             self.add_message(message)
@@ -197,7 +182,7 @@ class BaseChatMessageHistory(ABC):
         """Async add a list of messages.
 
         Args:
-            messages: A sequence of BaseMessage objects to store.
+            messages: A sequence of `BaseMessage` objects to store.
         """
         await run_in_executor(None, self.add_messages, messages)
 

libs/core/langchain_core/document_loaders/base.py

@@ -27,7 +27,7 @@ class BaseLoader(ABC):  # noqa: B024
     """Interface for Document Loader.
 
     Implementations should implement the lazy-loading method using generators
-    to avoid loading all Documents into memory at once.
+    to avoid loading all documents into memory at once.
 
     `load` is provided just for user convenience and should not be overridden.
     """
@@ -35,38 +35,40 @@ class BaseLoader(ABC):  # noqa: B024
     # Sub-classes should not implement this method directly. Instead, they
     # should implement the lazy load method.
     def load(self) -> list[Document]:
-        """Load data into Document objects.
+        """Load data into `Document` objects.
 
         Returns:
-            the documents.
+            The documents.
         """
         return list(self.lazy_load())
 
     async def aload(self) -> list[Document]:
-        """Load data into Document objects.
+        """Load data into `Document` objects.
 
         Returns:
-            the documents.
+            The documents.
         """
         return [document async for document in self.alazy_load()]
 
     def load_and_split(
         self, text_splitter: TextSplitter | None = None
     ) -> list[Document]:
-        """Load Documents and split into chunks. Chunks are returned as Documents.
+        """Load `Document` and split into chunks. Chunks are returned as `Document`.
 
-        Do not override this method. It should be considered to be deprecated!
+        !!! danger
+
+            Do not override this method. It should be considered to be deprecated!
 
         Args:
-            text_splitter: TextSplitter instance to use for splitting documents.
-                Defaults to RecursiveCharacterTextSplitter.
+            text_splitter: `TextSplitter` instance to use for splitting documents.
+                Defaults to `RecursiveCharacterTextSplitter`.
 
         Raises:
-            ImportError: If langchain-text-splitters is not installed
-                and no text_splitter is provided.
+            ImportError: If `langchain-text-splitters` is not installed
+                and no `text_splitter` is provided.
 
         Returns:
-            List of Documents.
+            List of `Document`.
         """
         if text_splitter is None:
             if not _HAS_TEXT_SPLITTERS:
@@ -86,10 +88,10 @@ class BaseLoader(ABC):  # noqa: B024
     # Attention: This method will be upgraded into an abstractmethod once it's
     #            implemented in all the existing subclasses.
     def lazy_load(self) -> Iterator[Document]:
-        """A lazy loader for Documents.
+        """A lazy loader for `Document`.
 
         Yields:
-            the documents.
+            The `Document` objects.
         """
         if type(self).load != BaseLoader.load:
             return iter(self.load())
@@ -97,10 +99,10 @@ class BaseLoader(ABC):  # noqa: B024
         raise NotImplementedError(msg)
 
     async def alazy_load(self) -> AsyncIterator[Document]:
-        """A lazy loader for Documents.
+        """A lazy loader for `Document`.
 
         Yields:
-            the documents.
+            The `Document` objects.
         """
         iterator = await run_in_executor(None, self.lazy_load)
         done = object()
@@ -115,7 +117,7 @@ class BaseBlobParser(ABC):
     """Abstract interface for blob parsers.
 
     A blob parser provides a way to parse raw data stored in a blob into one
-    or more documents.
+    or more `Document` objects.
 
     The parser can be composed with blob loaders, making it easy to reuse
     a parser independent of how the blob was originally loaded.
@@ -128,25 +130,25 @@ class BaseBlobParser(ABC):
         Subclasses are required to implement this method.
 
         Args:
-            blob: Blob instance
+            blob: `Blob` instance
 
         Returns:
-            Generator of documents
+            Generator of `Document` objects
         """
 
     def parse(self, blob: Blob) -> list[Document]:
-        """Eagerly parse the blob into a document or documents.
+        """Eagerly parse the blob into a `Document` or list of `Document` objects.
 
         This is a convenience method for interactive development environment.
 
-        Production applications should favor the lazy_parse method instead.
+        Production applications should favor the `lazy_parse` method instead.
 
         Subclasses should generally not over-ride this parse method.
 
         Args:
-            blob: Blob instance
+            blob: `Blob` instance
 
         Returns:
-            List of documents
+            List of `Document` objects
         """
         return list(self.lazy_parse(blob))

libs/core/langchain_core/document_loaders/blob_loaders.py

@@ -28,7 +28,7 @@ class BlobLoader(ABC):
     def yield_blobs(
         self,
     ) -> Iterable[Blob]:
-        """A lazy loader for raw data represented by LangChain's Blob object.
+        """A lazy loader for raw data represented by LangChain's `Blob` object.
 
         Returns:
             A generator over blobs

libs/core/langchain_core/document_loaders/langsmith.py

@@ -14,30 +14,27 @@ from langchain_core.documents import Document
 
 
 class LangSmithLoader(BaseLoader):
-    """Load LangSmith Dataset examples as Documents.
+    """Load LangSmith Dataset examples as `Document` objects.
 
-    Loads the example inputs as the Document page content and places the entire example
-    into the Document metadata. This allows you to easily create few-shot example
-    retrievers from the loaded documents.
+    Loads the example inputs as the `Document` page content and places the entire
+    example into the `Document` metadata. This allows you to easily create few-shot
+    example retrievers from the loaded documents.
 
-    ??? note "Lazy load"
+    ??? note "Lazy loading example"
 
-        .. code-block:: python
+        ```python
+        from langchain_core.document_loaders import LangSmithLoader
 
-            from langchain_core.document_loaders import LangSmithLoader
+        loader = LangSmithLoader(dataset_id="...", limit=100)
+        docs = []
+        for doc in loader.lazy_load():
+            docs.append(doc)
+        ```
 
-            loader = LangSmithLoader(dataset_id="...", limit=100)
-            docs = []
-            for doc in loader.lazy_load():
-                docs.append(doc)
-
-        .. code-block:: python
-
-            # -> [Document("...", metadata={"inputs": {...}, "outputs": {...}, ...}), ...]
-
-    !!! version-added "Added in version 0.2.34"
-
-    """  # noqa: E501
+        ```python
+        # -> [Document("...", metadata={"inputs": {...}, "outputs": {...}, ...}), ...]
+        ```
+    """
 
     def __init__(
         self,
@@ -60,33 +57,32 @@ class LangSmithLoader(BaseLoader):
         """Create a LangSmith loader.
 
         Args:
-            dataset_id: The ID of the dataset to filter by. Defaults to None.
-            dataset_name: The name of the dataset to filter by. Defaults to None.
-            content_key: The inputs key to set as Document page content. ``'.'`` characters
-                are interpreted as nested keys. E.g. ``content_key="first.second"`` will
+            dataset_id: The ID of the dataset to filter by.
+            dataset_name: The name of the dataset to filter by.
+            content_key: The inputs key to set as Document page content. `'.'` characters
+                are interpreted as nested keys. E.g. `content_key="first.second"` will
                 result in
-                ``Document(page_content=format_content(example.inputs["first"]["second"]))``
+                `Document(page_content=format_content(example.inputs["first"]["second"]))`
             format_content: Function for converting the content extracted from the example
                 inputs into a string. Defaults to JSON-encoding the contents.
-            example_ids: The IDs of the examples to filter by. Defaults to None.
-            as_of: The dataset version tag OR
-                timestamp to retrieve the examples as of.
-                Response examples will only be those that were present at the time
-                of the tagged (or timestamped) version.
+            example_ids: The IDs of the examples to filter by.
+            as_of: The dataset version tag or timestamp to retrieve the examples as of.
+                Response examples will only be those that were present at the time of
+                the tagged (or timestamped) version.
             splits: A list of dataset splits, which are
-                divisions of your dataset such as 'train', 'test', or 'validation'.
+                divisions of your dataset such as `train`, `test`, or `validation`.
                 Returns examples only from the specified splits.
-            inline_s3_urls: Whether to inline S3 URLs. Defaults to True.
-            offset: The offset to start from. Defaults to 0.
+            inline_s3_urls: Whether to inline S3 URLs.
+            offset: The offset to start from.
             limit: The maximum number of examples to return.
-            metadata: Metadata to filter by. Defaults to None.
+            metadata: Metadata to filter by.
             filter: A structured filter string to apply to the examples.
             client: LangSmith Client. If not provided will be initialized from below args.
             client_kwargs: Keyword args to pass to LangSmith client init. Should only be
-                specified if ``client`` isn't.
+                specified if `client` isn't.
 
         Raises:
-            ValueError: If both ``client`` and ``client_kwargs`` are provided.
+            ValueError: If both `client` and `client_kwargs` are provided.
         """  # noqa: E501
         if client and client_kwargs:
             raise ValueError

libs/core/langchain_core/documents/__init__.py

@@ -1,8 +1,28 @@
-"""Documents module.
+"""Documents module for data retrieval and processing workflows.
 
-**Document** module is a collection of classes that handle documents
-and their transformations.
+This module provides core abstractions for handling data in retrieval-augmented
+generation (RAG) pipelines, vector stores, and document processing workflows.
 
+!!! warning "Documents vs. message content"
+    This module is distinct from `langchain_core.messages.content`, which provides
+    multimodal content blocks for **LLM chat I/O** (text, images, audio, etc. within
+    messages).
+
+    **Key distinction:**
+
+    - **Documents** (this module): For **data retrieval and processing workflows**
+        - Vector stores, retrievers, RAG pipelines
+        - Text chunking, embedding, and semantic search
+        - Example: Chunks of a PDF stored in a vector database
+
+    - **Content Blocks** (`messages.content`): For **LLM conversational I/O**
+        - Multimodal message content sent to/from models
+        - Tool calls, reasoning, citations within chat
+        - Example: An image sent to a vision model in a chat message (via
+            [`ImageContentBlock`][langchain.messages.ImageContentBlock])
+
+    While both can represent similar data types (text, files), they serve different
+    architectural purposes in LangChain applications.
 """
 
 from typing import TYPE_CHECKING

libs/core/langchain_core/documents/base.py

@@ -1,4 +1,16 @@
-"""Base classes for media and documents."""
+"""Base classes for media and documents.
+
+This module contains core abstractions for **data retrieval and processing workflows**:
+
+- `BaseMedia`: Base class providing `id` and `metadata` fields
+- `Blob`: Raw data loading (files, binary data) - used by document loaders
+- `Document`: Text content for retrieval (RAG, vector stores, semantic search)
+
+!!! note "Not for LLM chat messages"
+    These classes are for data processing pipelines, not LLM I/O. For multimodal
+    content in chat messages (images, audio in conversations), see
+    `langchain.messages` content blocks instead.
+"""
 
 from __future__ import annotations
 
@@ -19,27 +31,23 @@ PathLike = str | PurePath
 
 
 class BaseMedia(Serializable):
-    """Use to represent media content.
+    """Base class for content used in retrieval and data processing workflows.
 
-    Media objects can be used to represent raw data, such as text or binary data.
+    Provides common fields for content that needs to be stored, indexed, or searched.
 
-    LangChain Media objects allow associating metadata and an optional identifier
-    with the content.
-
-    The presence of an ID and metadata make it easier to store, index, and search
-    over the content in a structured way.
+    !!! note
+        For multimodal content in **chat messages** (images, audio sent to/from LLMs),
+        use `langchain.messages` content blocks instead.
     """
 
     # The ID field is optional at the moment.
     # It will likely become required in a future major release after
-    # it has been adopted by enough vectorstore implementations.
+    # it has been adopted by enough VectorStore implementations.
     id: str | None = Field(default=None, coerce_numbers_to_str=True)
     """An optional identifier for the document.
 
     Ideally this should be unique across the document collection and formatted
     as a UUID, but this will not be enforced.
-
-    !!! version-added "Added in version 0.2.11"
     """
 
     metadata: dict = Field(default_factory=dict)
@@ -47,72 +55,70 @@ class BaseMedia(Serializable):
 
 
 class Blob(BaseMedia):
-    """Blob represents raw data by either reference or value.
+    """Raw data abstraction for document loading and file processing.
 
-    Provides an interface to materialize the blob in different representations, and
-    help to decouple the development of data loaders from the downstream parsing of
-    the raw data.
+    Represents raw bytes or text, either in-memory or by file reference. Used
+    primarily by document loaders to decouple data loading from parsing.
 
-    Inspired by: https://developer.mozilla.org/en-US/docs/Web/API/Blob
+    Inspired by [Mozilla's `Blob`](https://developer.mozilla.org/en-US/docs/Web/API/Blob)
 
-    Example: Initialize a blob from in-memory data
+    ???+ example "Initialize a blob from in-memory data"
 
-        .. code-block:: python
+        ```python
+        from langchain_core.documents import Blob
 
-            from langchain_core.documents import Blob
+        blob = Blob.from_data("Hello, world!")
 
-            blob = Blob.from_data("Hello, world!")
+        # Read the blob as a string
+        print(blob.as_string())
 
-            # Read the blob as a string
-            print(blob.as_string())
+        # Read the blob as bytes
+        print(blob.as_bytes())
 
-            # Read the blob as bytes
-            print(blob.as_bytes())
+        # Read the blob as a byte stream
+        with blob.as_bytes_io() as f:
+            print(f.read())
+        ```
 
-            # Read the blob as a byte stream
-            with blob.as_bytes_io() as f:
-                print(f.read())
+    ??? example "Load from memory and specify MIME type and metadata"
 
-    Example: Load from memory and specify mime-type and metadata
+        ```python
+        from langchain_core.documents import Blob
 
-        .. code-block:: python
+        blob = Blob.from_data(
+            data="Hello, world!",
+            mime_type="text/plain",
+            metadata={"source": "https://example.com"},
+        )
+        ```
 
-            from langchain_core.documents import Blob
+    ??? example "Load the blob from a file"
 
-            blob = Blob.from_data(
-                data="Hello, world!",
-                mime_type="text/plain",
-                metadata={"source": "https://example.com"},
-            )
+        ```python
+        from langchain_core.documents import Blob
 
-    Example: Load the blob from a file
+        blob = Blob.from_path("path/to/file.txt")
 
-        .. code-block:: python
+        # Read the blob as a string
+        print(blob.as_string())
 
-            from langchain_core.documents import Blob
-
-            blob = Blob.from_path("path/to/file.txt")
-
-            # Read the blob as a string
-            print(blob.as_string())
-
-            # Read the blob as bytes
-            print(blob.as_bytes())
-
-            # Read the blob as a byte stream
-            with blob.as_bytes_io() as f:
-                print(f.read())
+        # Read the blob as bytes
+        print(blob.as_bytes())
 
+        # Read the blob as a byte stream
+        with blob.as_bytes_io() as f:
+            print(f.read())
+        ```
     """
 
     data: bytes | str | None = None
-    """Raw data associated with the blob."""
+    """Raw data associated with the `Blob`."""
     mimetype: str | None = None
-    """MimeType not to be confused with a file extension."""
+    """MIME type, not to be confused with a file extension."""
     encoding: str = "utf-8"
     """Encoding to use if decoding the bytes into a string.
 
-    Use utf-8 as default encoding, if decoding to string.
+    Uses `utf-8` as default encoding if decoding to string.
     """
     path: PathLike | None = None
     """Location where the original content was found."""
@@ -126,9 +132,9 @@ class Blob(BaseMedia):
     def source(self) -> str | None:
         """The source location of the blob as string if known otherwise none.
 
-        If a path is associated with the blob, it will default to the path location.
+        If a path is associated with the `Blob`, it will default to the path location.
 
-        Unless explicitly set via a metadata field called "source", in which
+        Unless explicitly set via a metadata field called `'source'`, in which
         case that value will be used instead.
         """
         if self.metadata and "source" in self.metadata:
@@ -212,15 +218,15 @@ class Blob(BaseMedia):
         """Load the blob from a path like object.
 
         Args:
-            path: path like object to file to be read
+            path: Path-like object to file to be read
             encoding: Encoding to use if decoding the bytes into a string
-            mime_type: if provided, will be set as the mime-type of the data
-            guess_type: If True, the mimetype will be guessed from the file extension,
-                        if a mime-type was not provided
-            metadata: Metadata to associate with the blob
+            mime_type: If provided, will be set as the MIME type of the data
+            guess_type: If `True`, the MIME type will be guessed from the file
+                extension, if a MIME type was not provided
+            metadata: Metadata to associate with the `Blob`
 
         Returns:
-            Blob instance
+            `Blob` instance
         """
         if mime_type is None and guess_type:
             mimetype = mimetypes.guess_type(path)[0] if guess_type else None
@@ -246,17 +252,17 @@ class Blob(BaseMedia):
         path: str | None = None,
         metadata: dict | None = None,
     ) -> Blob:
-        """Initialize the blob from in-memory data.
+        """Initialize the `Blob` from in-memory data.
 
         Args:
-            data: the in-memory data associated with the blob
+            data: The in-memory data associated with the `Blob`
             encoding: Encoding to use if decoding the bytes into a string
-            mime_type: if provided, will be set as the mime-type of the data
-            path: if provided, will be set as the source from which the data came
-            metadata: Metadata to associate with the blob
+            mime_type: If provided, will be set as the MIME type of the data
+            path: If provided, will be set as the source from which the data came
+            metadata: Metadata to associate with the `Blob`
 
         Returns:
-            Blob instance
+            `Blob` instance
         """
         return cls(
             data=data,
@@ -277,16 +283,18 @@ class Blob(BaseMedia):
 class Document(BaseMedia):
     """Class for storing a piece of text and associated metadata.
 
+    !!! note
+        `Document` is for **retrieval workflows**, not chat I/O. For sending text
+        to an LLM in a conversation, use message types from `langchain.messages`.
+
     Example:
+        ```python
+        from langchain_core.documents import Document
 
-        .. code-block:: python
-
-            from langchain_core.documents import Document
-
-            document = Document(
-                page_content="Hello, world!", metadata={"source": "https://example.com"}
-            )
-
+        document = Document(
+            page_content="Hello, world!", metadata={"source": "https://example.com"}
+        )
+        ```
     """
 
     page_content: str
@@ -301,12 +309,12 @@ class Document(BaseMedia):
 
     @classmethod
     def is_lc_serializable(cls) -> bool:
-        """Return True as this class is serializable."""
+        """Return `True` as this class is serializable."""
         return True
 
     @classmethod
     def get_lc_namespace(cls) -> list[str]:
-        """Get the namespace of the langchain object.
+        """Get the namespace of the LangChain object.
 
         Returns:
             ["langchain", "schema", "document"]
@@ -314,10 +322,10 @@ class Document(BaseMedia):
         return ["langchain", "schema", "document"]
 
     def __str__(self) -> str:
-        """Override __str__ to restrict it to page_content and metadata.
+        """Override `__str__` to restrict it to page_content and metadata.
 
         Returns:
-            A string representation of the Document.
+            A string representation of the `Document`.
         """
         # The format matches pydantic format for __str__.
         #

libs/core/langchain_core/documents/compressor.py

@@ -21,14 +21,14 @@ class BaseDocumentCompressor(BaseModel, ABC):
 
     This abstraction is primarily used for post-processing of retrieved documents.
 
-    Documents matching a given query are first retrieved.
+    `Document` objects matching a given query are first retrieved.
 
     Then the list of documents can be further processed.
 
     For example, one could re-rank the retrieved documents using an LLM.
 
     !!! note
-        Users should favor using a RunnableLambda instead of sub-classing from this
+        Users should favor using a `RunnableLambda` instead of sub-classing from this
         interface.
 
     """
@@ -43,9 +43,9 @@ class BaseDocumentCompressor(BaseModel, ABC):
         """Compress retrieved documents given the query context.
 
         Args:
-            documents: The retrieved documents.
+            documents: The retrieved `Document` objects.
             query: The query context.
-            callbacks: Optional callbacks to run during compression.
+            callbacks: Optional `Callbacks` to run during compression.
 
         Returns:
             The compressed documents.
@@ -61,9 +61,9 @@ class BaseDocumentCompressor(BaseModel, ABC):
         """Async compress retrieved documents given the query context.
 
         Args:
-            documents: The retrieved documents.
+            documents: The retrieved `Document` objects.
             query: The query context.
-            callbacks: Optional callbacks to run during compression.
+            callbacks: Optional `Callbacks` to run during compression.
 
         Returns:
             The compressed documents.

libs/core/langchain_core/documents/transformers.py

@@ -16,39 +16,38 @@ if TYPE_CHECKING:
 class BaseDocumentTransformer(ABC):
     """Abstract base class for document transformation.
 
-    A document transformation takes a sequence of Documents and returns a
-    sequence of transformed Documents.
+    A document transformation takes a sequence of `Document` objects and returns a
+    sequence of transformed `Document` objects.
 
     Example:
-        .. code-block:: python
+        ```python
+        class EmbeddingsRedundantFilter(BaseDocumentTransformer, BaseModel):
+            embeddings: Embeddings
+            similarity_fn: Callable = cosine_similarity
+            similarity_threshold: float = 0.95
 
-            class EmbeddingsRedundantFilter(BaseDocumentTransformer, BaseModel):
-                embeddings: Embeddings
-                similarity_fn: Callable = cosine_similarity
-                similarity_threshold: float = 0.95
+            class Config:
+                arbitrary_types_allowed = True
 
-                class Config:
-                    arbitrary_types_allowed = True
-
-                def transform_documents(
-                    self, documents: Sequence[Document], **kwargs: Any
-                ) -> Sequence[Document]:
-                    stateful_documents = get_stateful_documents(documents)
-                    embedded_documents = _get_embeddings_from_stateful_docs(
-                        self.embeddings, stateful_documents
-                    )
-                    included_idxs = _filter_similar_embeddings(
-                        embedded_documents,
-                        self.similarity_fn,
-                        self.similarity_threshold,
-                    )
-                    return [stateful_documents[i] for i in sorted(included_idxs)]
-
-                async def atransform_documents(
-                    self, documents: Sequence[Document], **kwargs: Any
-                ) -> Sequence[Document]:
-                    raise NotImplementedError
+            def transform_documents(
+                self, documents: Sequence[Document], **kwargs: Any
+            ) -> Sequence[Document]:
+                stateful_documents = get_stateful_documents(documents)
+                embedded_documents = _get_embeddings_from_stateful_docs(
+                    self.embeddings, stateful_documents
+                )
+                included_idxs = _filter_similar_embeddings(
+                    embedded_documents,
+                    self.similarity_fn,
+                    self.similarity_threshold,
+                )
+                return [stateful_documents[i] for i in sorted(included_idxs)]
 
+            async def atransform_documents(
+                self, documents: Sequence[Document], **kwargs: Any
+            ) -> Sequence[Document]:
+                raise NotImplementedError
+        ```
     """
 
     @abstractmethod
@@ -58,10 +57,10 @@ class BaseDocumentTransformer(ABC):
         """Transform a list of documents.
 
         Args:
-            documents: A sequence of Documents to be transformed.
+            documents: A sequence of `Document` objects to be transformed.
 
         Returns:
-            A sequence of transformed Documents.
+            A sequence of transformed `Document` objects.
         """
 
     async def atransform_documents(
@@ -70,10 +69,10 @@ class BaseDocumentTransformer(ABC):
         """Asynchronously transform a list of documents.
 
         Args:
-            documents: A sequence of Documents to be transformed.
+            documents: A sequence of `Document` objects to be transformed.
 
         Returns:
-            A sequence of transformed Documents.
+            A sequence of transformed `Document` objects.
         """
         return await run_in_executor(
             None, self.transform_documents, documents, **kwargs

libs/core/langchain_core/embeddings/fake.py

@@ -18,40 +18,38 @@ class FakeEmbeddings(Embeddings, BaseModel):
 
     This embedding model creates embeddings by sampling from a normal distribution.
 
-    Do not use this outside of testing, as it is not a real embedding model.
+    !!! danger "Toy model"
+        Do not use this outside of testing, as it is not a real embedding model.
 
     Instantiate:
-        .. code-block:: python
+        ```python
+        from langchain_core.embeddings import FakeEmbeddings
 
-            from langchain_core.embeddings import FakeEmbeddings
-
-            embed = FakeEmbeddings(size=100)
+        embed = FakeEmbeddings(size=100)
+        ```
 
     Embed single text:
-        .. code-block:: python
-
-            input_text = "The meaning of life is 42"
-            vector = embed.embed_query(input_text)
-            print(vector[:3])
-
-        .. code-block:: python
-
-            [-0.700234640213188, -0.581266257710429, -1.1328482266445354]
+        ```python
+        input_text = "The meaning of life is 42"
+        vector = embed.embed_query(input_text)
+        print(vector[:3])
+        ```
+        ```python
+        [-0.700234640213188, -0.581266257710429, -1.1328482266445354]
+        ```
 
     Embed multiple texts:
-        .. code-block:: python
-
-            input_texts = ["Document 1...", "Document 2..."]
-            vectors = embed.embed_documents(input_texts)
-            print(len(vectors))
-            # The first 3 coordinates for the first vector
-            print(vectors[0][:3])
-
-        .. code-block:: python
-
-            2
-            [-0.5670477847544458, -0.31403828652395727, -0.5840547508955257]
-
+        ```python
+        input_texts = ["Document 1...", "Document 2..."]
+        vectors = embed.embed_documents(input_texts)
+        print(len(vectors))
+        # The first 3 coordinates for the first vector
+        print(vectors[0][:3])
+        ```
+        ```python
+        2
+        [-0.5670477847544458, -0.31403828652395727, -0.5840547508955257]
+        ```
     """
 
     size: int
@@ -75,40 +73,38 @@ class DeterministicFakeEmbedding(Embeddings, BaseModel):
     This embedding model creates embeddings by sampling from a normal distribution
     with a seed based on the hash of the text.
 
-    Do not use this outside of testing, as it is not a real embedding model.
+    !!! danger "Toy model"
+        Do not use this outside of testing, as it is not a real embedding model.
 
     Instantiate:
-        .. code-block:: python
+        ```python
+        from langchain_core.embeddings import DeterministicFakeEmbedding
 
-            from langchain_core.embeddings import DeterministicFakeEmbedding
-
-            embed = DeterministicFakeEmbedding(size=100)
+        embed = DeterministicFakeEmbedding(size=100)
+        ```
 
     Embed single text:
-        .. code-block:: python
-
-            input_text = "The meaning of life is 42"
-            vector = embed.embed_query(input_text)
-            print(vector[:3])
-
-        .. code-block:: python
-
-            [-0.700234640213188, -0.581266257710429, -1.1328482266445354]
+        ```python
+        input_text = "The meaning of life is 42"
+        vector = embed.embed_query(input_text)
+        print(vector[:3])
+        ```
+        ```python
+        [-0.700234640213188, -0.581266257710429, -1.1328482266445354]
+        ```
 
     Embed multiple texts:
-        .. code-block:: python
-
-            input_texts = ["Document 1...", "Document 2..."]
-            vectors = embed.embed_documents(input_texts)
-            print(len(vectors))
-            # The first 3 coordinates for the first vector
-            print(vectors[0][:3])
-
-        .. code-block:: python
-
-            2
-            [-0.5670477847544458, -0.31403828652395727, -0.5840547508955257]
-
+        ```python
+        input_texts = ["Document 1...", "Document 2..."]
+        vectors = embed.embed_documents(input_texts)
+        print(len(vectors))
+        # The first 3 coordinates for the first vector
+        print(vectors[0][:3])
+        ```
+        ```python
+        2
+        [-0.5670477847544458, -0.31403828652395727, -0.5840547508955257]
+        ```
     """
 
     size: int

libs/core/langchain_core/example_selectors/length_based.py

@@ -29,7 +29,7 @@ class LengthBasedExampleSelector(BaseExampleSelector, BaseModel):
     max_length: int = 2048
     """Max length for the prompt, beyond which examples are cut."""
 
-    example_text_lengths: list[int] = Field(default_factory=list)  # :meta private:
+    example_text_lengths: list[int] = Field(default_factory=list)
     """Length of each example."""
 
     def add_example(self, example: dict[str, str]) -> None:

libs/core/langchain_core/example_selectors/semantic_similarity.py

@@ -41,7 +41,7 @@ class _VectorStoreExampleSelector(BaseExampleSelector, BaseModel, ABC):
     """Optional keys to filter input to. If provided, the search is based on
     the input variables instead of all variables."""
     vectorstore_kwargs: dict[str, Any] | None = None
-    """Extra arguments passed to similarity_search function of the vectorstore."""
+    """Extra arguments passed to similarity_search function of the `VectorStore`."""
 
     model_config = ConfigDict(
         arbitrary_types_allowed=True,
@@ -154,12 +154,12 @@ class SemanticSimilarityExampleSelector(_VectorStoreExampleSelector):
             examples: List of examples to use in the prompt.
             embeddings: An initialized embedding API interface, e.g. OpenAIEmbeddings().
             vectorstore_cls: A vector store DB interface class, e.g. FAISS.
-            k: Number of examples to select. Default is 4.
+            k: Number of examples to select.
             input_keys: If provided, the search is based on the input variables
                 instead of all variables.
             example_keys: If provided, keys to filter examples to.
             vectorstore_kwargs: Extra arguments passed to similarity_search function
-                of the vectorstore.
+                of the `VectorStore`.
             vectorstore_cls_kwargs: optional kwargs containing url for vector store
 
         Returns:
@@ -198,12 +198,12 @@ class SemanticSimilarityExampleSelector(_VectorStoreExampleSelector):
             examples: List of examples to use in the prompt.
             embeddings: An initialized embedding API interface, e.g. OpenAIEmbeddings().
             vectorstore_cls: A vector store DB interface class, e.g. FAISS.
-            k: Number of examples to select. Default is 4.
+            k: Number of examples to select.
             input_keys: If provided, the search is based on the input variables
                 instead of all variables.
             example_keys: If provided, keys to filter examples to.
             vectorstore_kwargs: Extra arguments passed to similarity_search function
-                of the vectorstore.
+                of the `VectorStore`.
             vectorstore_cls_kwargs: optional kwargs containing url for vector store
 
         Returns:
@@ -285,14 +285,13 @@ class MaxMarginalRelevanceExampleSelector(_VectorStoreExampleSelector):
             examples: List of examples to use in the prompt.
             embeddings: An initialized embedding API interface, e.g. OpenAIEmbeddings().
             vectorstore_cls: A vector store DB interface class, e.g. FAISS.
-            k: Number of examples to select. Default is 4.
-            fetch_k: Number of Documents to fetch to pass to MMR algorithm.
-                Default is 20.
+            k: Number of examples to select.
+            fetch_k: Number of `Document` objects to fetch to pass to MMR algorithm.
             input_keys: If provided, the search is based on the input variables
                 instead of all variables.
             example_keys: If provided, keys to filter examples to.
             vectorstore_kwargs: Extra arguments passed to similarity_search function
-                of the vectorstore.
+                of the `VectorStore`.
             vectorstore_cls_kwargs: optional kwargs containing url for vector store
 
         Returns:
@@ -333,14 +332,13 @@ class MaxMarginalRelevanceExampleSelector(_VectorStoreExampleSelector):
             examples: List of examples to use in the prompt.
             embeddings: An initialized embedding API interface, e.g. OpenAIEmbeddings().
             vectorstore_cls: A vector store DB interface class, e.g. FAISS.
-            k: Number of examples to select. Default is 4.
-            fetch_k: Number of Documents to fetch to pass to MMR algorithm.
-                Default is 20.
+            k: Number of examples to select.
+            fetch_k: Number of `Document` objects to fetch to pass to MMR algorithm.
             input_keys: If provided, the search is based on the input variables
                 instead of all variables.
             example_keys: If provided, keys to filter examples to.
             vectorstore_kwargs: Extra arguments passed to similarity_search function
-                of the vectorstore.
+                of the `VectorStore`.
             vectorstore_cls_kwargs: optional kwargs containing url for vector store
 
         Returns:

libs/core/langchain_core/exceptions.py

@@ -16,9 +16,10 @@ class OutputParserException(ValueError, LangChainException):  # noqa: N818
     """Exception that output parsers should raise to signify a parsing error.
 
     This exists to differentiate parsing errors from other code or execution errors
-    that also may arise inside the output parser. OutputParserExceptions will be
-    available to catch and handle in ways to fix the parsing error, while other
-    errors will be raised.
+    that also may arise inside the output parser.
+
+    `OutputParserException` will be available to catch and handle in ways to fix the
+    parsing error, while other errors will be raised.
     """
 
     def __init__(
@@ -28,24 +29,24 @@ class OutputParserException(ValueError, LangChainException):  # noqa: N818
         llm_output: str | None = None,
         send_to_llm: bool = False,  # noqa: FBT001,FBT002
     ):
-        """Create an OutputParserException.
+        """Create an `OutputParserException`.
 
         Args:
             error: The error that's being re-raised or an error message.
-            observation: String explanation of error which can be passed to a
-                model to try and remediate the issue. Defaults to None.
+            observation: String explanation of error which can be passed to a model to
+                try and remediate the issue.
             llm_output: String model output which is error-ing.
-                Defaults to None.
+
             send_to_llm: Whether to send the observation and llm_output back to an Agent
-                after an OutputParserException has been raised.
+                after an `OutputParserException` has been raised.
+
                 This gives the underlying model driving the agent the context that the
                 previous output was improperly structured, in the hopes that it will
                 update the output to the correct format.
-                Defaults to False.
 
         Raises:
-            ValueError: If ``send_to_llm`` is True but either observation or
-                ``llm_output`` are not provided.
+            ValueError: If `send_to_llm` is `True` but either observation or
+                `llm_output` are not provided.
         """
         if isinstance(error, str):
             error = create_message(
@@ -67,11 +68,11 @@ class ErrorCode(Enum):
     """Error codes."""
 
     INVALID_PROMPT_INPUT = "INVALID_PROMPT_INPUT"
-    INVALID_TOOL_RESULTS = "INVALID_TOOL_RESULTS"
+    INVALID_TOOL_RESULTS = "INVALID_TOOL_RESULTS"  # Used in JS; not Py (yet)
     MESSAGE_COERCION_FAILURE = "MESSAGE_COERCION_FAILURE"
-    MODEL_AUTHENTICATION = "MODEL_AUTHENTICATION"
-    MODEL_NOT_FOUND = "MODEL_NOT_FOUND"
-    MODEL_RATE_LIMIT = "MODEL_RATE_LIMIT"
+    MODEL_AUTHENTICATION = "MODEL_AUTHENTICATION"  # Used in JS; not Py (yet)
+    MODEL_NOT_FOUND = "MODEL_NOT_FOUND"  # Used in JS; not Py (yet)
+    MODEL_RATE_LIMIT = "MODEL_RATE_LIMIT"  # Used in JS; not Py (yet)
     OUTPUT_PARSING_FAILURE = "OUTPUT_PARSING_FAILURE"
 
 
@@ -87,6 +88,6 @@ def create_message(*, message: str, error_code: ErrorCode) -> str:
     """
     return (
         f"{message}\n"
-        "For troubleshooting, visit: https://python.langchain.com/docs/"
-        f"troubleshooting/errors/{error_code.value} "
+        "For troubleshooting, visit: https://docs.langchain.com/oss/python/langchain"
+        f"/errors/{error_code.value} "
     )

libs/core/langchain_core/indexing/__init__.py

@@ -1,7 +1,7 @@
 """Code to help indexing data into a vectorstore.
 
 This package contains helper logic to help deal with indexing data into
-a vectorstore while avoiding duplicated content and over-writing content
+a `VectorStore` while avoiding duplicated content and over-writing content
 if it's unchanged.
 """
 

libs/core/langchain_core/indexing/api.py

@@ -298,61 +298,58 @@ def index(
     For the time being, documents are indexed using their hashes, and users
     are not able to specify the uid of the document.
 
-    !!! warning "Behavior changed in 0.3.25"
-        Added ``scoped_full`` cleanup mode.
+    !!! warning "Behavior changed in `langchain-core` 0.3.25"
+        Added `scoped_full` cleanup mode.
 
-    !!! important
+    !!! warning
 
         * In full mode, the loader should be returning
-          the entire dataset, and not just a subset of the dataset.
-          Otherwise, the auto_cleanup will remove documents that it is not
-          supposed to.
+            the entire dataset, and not just a subset of the dataset.
+            Otherwise, the auto_cleanup will remove documents that it is not
+            supposed to.
         * In incremental mode, if documents associated with a particular
-          source id appear across different batches, the indexing API
-          will do some redundant work. This will still result in the
-          correct end state of the index, but will unfortunately not be
-          100% efficient. For example, if a given document is split into 15
-          chunks, and we index them using a batch size of 5, we'll have 3 batches
-          all with the same source id. In general, to avoid doing too much
-          redundant work select as big a batch size as possible.
-        * The ``scoped_full`` mode is suitable if determining an appropriate batch size
-          is challenging or if your data loader cannot return the entire dataset at
-          once. This mode keeps track of source IDs in memory, which should be fine
-          for most use cases. If your dataset is large (10M+ docs), you will likely
-          need to parallelize the indexing process regardless.
+            source id appear across different batches, the indexing API
+            will do some redundant work. This will still result in the
+            correct end state of the index, but will unfortunately not be
+            100% efficient. For example, if a given document is split into 15
+            chunks, and we index them using a batch size of 5, we'll have 3 batches
+            all with the same source id. In general, to avoid doing too much
+            redundant work select as big a batch size as possible.
+        * The `scoped_full` mode is suitable if determining an appropriate batch size
+            is challenging or if your data loader cannot return the entire dataset at
+            once. This mode keeps track of source IDs in memory, which should be fine
+            for most use cases. If your dataset is large (10M+ docs), you will likely
+            need to parallelize the indexing process regardless.
 
     Args:
         docs_source: Data loader or iterable of documents to index.
         record_manager: Timestamped set to keep track of which documents were
             updated.
-        vector_store: VectorStore or DocumentIndex to index the documents into.
-        batch_size: Batch size to use when indexing. Default is 100.
-        cleanup: How to handle clean up of documents. Default is None.
+        vector_store: `VectorStore` or DocumentIndex to index the documents into.
+        batch_size: Batch size to use when indexing.
+        cleanup: How to handle clean up of documents.
 
             - incremental: Cleans up all documents that haven't been updated AND
-              that are associated with source ids that were seen during indexing.
-              Clean up is done continuously during indexing helping to minimize the
-              probability of users seeing duplicated content.
+                that are associated with source IDs that were seen during indexing.
+                Clean up is done continuously during indexing helping to minimize the
+                probability of users seeing duplicated content.
             - full: Delete all documents that have not been returned by the loader
-              during this run of indexing.
-              Clean up runs after all documents have been indexed.
-              This means that users may see duplicated content during indexing.
+                during this run of indexing.
+                Clean up runs after all documents have been indexed.
+                This means that users may see duplicated content during indexing.
             - scoped_full: Similar to Full, but only deletes all documents
-              that haven't been updated AND that are associated with
-              source ids that were seen during indexing.
+                that haven't been updated AND that are associated with
+                source IDs that were seen during indexing.
             - None: Do not delete any documents.
         source_id_key: Optional key that helps identify the original source
-            of the document. Default is None.
+            of the document.
         cleanup_batch_size: Batch size to use when cleaning up documents.
-            Default is 1_000.
         force_update: Force update documents even if they are present in the
             record manager. Useful if you are re-indexing with updated embeddings.
-            Default is False.
         key_encoder: Hashing algorithm to use for hashing the document content and
-            metadata. Default is "sha1".
-            Other options include "blake2b", "sha256", and "sha512".
+            metadata. Options include "blake2b", "sha256", and "sha512".
 
-            !!! version-added "Added in version 0.3.66"
+            !!! version-added "Added in `langchain-core` 0.3.66"
 
         key_encoder: Hashing algorithm to use for hashing the document.
             If not provided, a default encoder using SHA-1 will be used.
@@ -366,10 +363,10 @@ def index(
             When changing the key encoder, you must change the
             index as well to avoid duplicated documents in the cache.
         upsert_kwargs: Additional keyword arguments to pass to the add_documents
-            method of the VectorStore or the upsert method of the DocumentIndex.
+            method of the `VectorStore` or the upsert method of the DocumentIndex.
             For example, you can use this to specify a custom vector_field:
             upsert_kwargs={"vector_field": "embedding"}
-            !!! version-added "Added in version 0.3.10"
+            !!! version-added "Added in `langchain-core` 0.3.10"
 
     Returns:
         Indexing result which contains information about how many documents
@@ -378,11 +375,11 @@ def index(
     Raises:
         ValueError: If cleanup mode is not one of 'incremental', 'full' or None
         ValueError: If cleanup mode is incremental and source_id_key is None.
-        ValueError: If vectorstore does not have
+        ValueError: If `VectorStore` does not have
             "delete" and "add_documents" required methods.
         ValueError: If source_id_key is not None, but is not a string or callable.
-        TypeError: If ``vectorstore`` is not a VectorStore or a DocumentIndex.
-        AssertionError: If ``source_id`` is None when cleanup mode is incremental.
+        TypeError: If `vectorstore` is not a `VectorStore` or a DocumentIndex.
+        AssertionError: If `source_id` is None when cleanup mode is incremental.
             (should be unreachable code).
     """
     # Behavior is deprecated, but we keep it for backwards compatibility.
@@ -418,7 +415,7 @@ def index(
                 raise ValueError(msg)
 
         if type(destination).delete == VectorStore.delete:
-            # Checking if the vectorstore has overridden the default delete method
+            # Checking if the VectorStore has overridden the default delete method
             # implementation which just raises a NotImplementedError
             msg = "Vectorstore has not implemented the delete method"
             raise ValueError(msg)
@@ -469,11 +466,11 @@ def index(
         ]
 
         if cleanup in {"incremental", "scoped_full"}:
-            # source ids are required.
+            # Source IDs are required.
             for source_id, hashed_doc in zip(source_ids, hashed_docs, strict=False):
                 if source_id is None:
                     msg = (
-                        f"Source ids are required when cleanup mode is "
+                        f"Source IDs are required when cleanup mode is "
                         f"incremental or scoped_full. "
                         f"Document that starts with "
                         f"content: {hashed_doc.page_content[:100]} "
@@ -482,7 +479,7 @@ def index(
                     raise ValueError(msg)
                 if cleanup == "scoped_full":
                     scoped_full_cleanup_source_ids.add(source_id)
-            # source ids cannot be None after for loop above.
+            # Source IDs cannot be None after for loop above.
             source_ids = cast("Sequence[str]", source_ids)
 
         exists_batch = record_manager.exists(
@@ -541,7 +538,7 @@ def index(
         # If source IDs are provided, we can do the deletion incrementally!
         if cleanup == "incremental":
             # Get the uids of the documents that were not returned by the loader.
-            # mypy isn't good enough to determine that source ids cannot be None
+            # mypy isn't good enough to determine that source IDs cannot be None
             # here due to a check that's happening above, so we check again.
             for source_id in source_ids:
                 if source_id is None:
@@ -639,61 +636,58 @@ async def aindex(
     For the time being, documents are indexed using their hashes, and users
     are not able to specify the uid of the document.
 
-    !!! warning "Behavior changed in 0.3.25"
-        Added ``scoped_full`` cleanup mode.
+    !!! warning "Behavior changed in `langchain-core` 0.3.25"
+        Added `scoped_full` cleanup mode.
 
-    !!! important
+    !!! warning
 
         * In full mode, the loader should be returning
-          the entire dataset, and not just a subset of the dataset.
-          Otherwise, the auto_cleanup will remove documents that it is not
-          supposed to.
+            the entire dataset, and not just a subset of the dataset.
+            Otherwise, the auto_cleanup will remove documents that it is not
+            supposed to.
         * In incremental mode, if documents associated with a particular
-          source id appear across different batches, the indexing API
-          will do some redundant work. This will still result in the
-          correct end state of the index, but will unfortunately not be
-          100% efficient. For example, if a given document is split into 15
-          chunks, and we index them using a batch size of 5, we'll have 3 batches
-          all with the same source id. In general, to avoid doing too much
-          redundant work select as big a batch size as possible.
-        * The ``scoped_full`` mode is suitable if determining an appropriate batch size
-          is challenging or if your data loader cannot return the entire dataset at
-          once. This mode keeps track of source IDs in memory, which should be fine
-          for most use cases. If your dataset is large (10M+ docs), you will likely
-          need to parallelize the indexing process regardless.
+            source id appear across different batches, the indexing API
+            will do some redundant work. This will still result in the
+            correct end state of the index, but will unfortunately not be
+            100% efficient. For example, if a given document is split into 15
+            chunks, and we index them using a batch size of 5, we'll have 3 batches
+            all with the same source id. In general, to avoid doing too much
+            redundant work select as big a batch size as possible.
+        * The `scoped_full` mode is suitable if determining an appropriate batch size
+            is challenging or if your data loader cannot return the entire dataset at
+            once. This mode keeps track of source IDs in memory, which should be fine
+            for most use cases. If your dataset is large (10M+ docs), you will likely
+            need to parallelize the indexing process regardless.
 
     Args:
         docs_source: Data loader or iterable of documents to index.
         record_manager: Timestamped set to keep track of which documents were
             updated.
-        vector_store: VectorStore or DocumentIndex to index the documents into.
-        batch_size: Batch size to use when indexing. Default is 100.
-        cleanup: How to handle clean up of documents. Default is None.
+        vector_store: `VectorStore` or DocumentIndex to index the documents into.
+        batch_size: Batch size to use when indexing.
+        cleanup: How to handle clean up of documents.
 
             - incremental: Cleans up all documents that haven't been updated AND
-              that are associated with source ids that were seen during indexing.
-              Clean up is done continuously during indexing helping to minimize the
-              probability of users seeing duplicated content.
+                that are associated with source IDs that were seen during indexing.
+                Clean up is done continuously during indexing helping to minimize the
+                probability of users seeing duplicated content.
             - full: Delete all documents that have not been returned by the loader
-              during this run of indexing.
-              Clean up runs after all documents have been indexed.
-              This means that users may see duplicated content during indexing.
+                during this run of indexing.
+                Clean up runs after all documents have been indexed.
+                This means that users may see duplicated content during indexing.
             - scoped_full: Similar to Full, but only deletes all documents
-              that haven't been updated AND that are associated with
-              source ids that were seen during indexing.
+                that haven't been updated AND that are associated with
+                source IDs that were seen during indexing.
             - None: Do not delete any documents.
         source_id_key: Optional key that helps identify the original source
-            of the document. Default is None.
+            of the document.
         cleanup_batch_size: Batch size to use when cleaning up documents.
-            Default is 1_000.
         force_update: Force update documents even if they are present in the
             record manager. Useful if you are re-indexing with updated embeddings.
-            Default is False.
         key_encoder: Hashing algorithm to use for hashing the document content and
-            metadata. Default is "sha1".
-            Other options include "blake2b", "sha256", and "sha512".
+            metadata. Options include "blake2b", "sha256", and "sha512".
 
-            !!! version-added "Added in version 0.3.66"
+            !!! version-added "Added in `langchain-core` 0.3.66"
 
         key_encoder: Hashing algorithm to use for hashing the document.
             If not provided, a default encoder using SHA-1 will be used.
@@ -707,10 +701,10 @@ async def aindex(
             When changing the key encoder, you must change the
             index as well to avoid duplicated documents in the cache.
         upsert_kwargs: Additional keyword arguments to pass to the add_documents
-            method of the VectorStore or the upsert method of the DocumentIndex.
+            method of the `VectorStore` or the upsert method of the DocumentIndex.
             For example, you can use this to specify a custom vector_field:
             upsert_kwargs={"vector_field": "embedding"}
-            !!! version-added "Added in version 0.3.10"
+            !!! version-added "Added in `langchain-core` 0.3.10"
 
     Returns:
         Indexing result which contains information about how many documents
@@ -719,12 +713,12 @@ async def aindex(
     Raises:
         ValueError: If cleanup mode is not one of 'incremental', 'full' or None
         ValueError: If cleanup mode is incremental and source_id_key is None.
-        ValueError: If vectorstore does not have
+        ValueError: If `VectorStore` does not have
             "adelete" and "aadd_documents" required methods.
         ValueError: If source_id_key is not None, but is not a string or callable.
-        TypeError: If ``vector_store`` is not a VectorStore or DocumentIndex.
-        AssertionError: If ``source_id_key`` is None when cleanup mode is
-            incremental or ``scoped_full`` (should be unreachable).
+        TypeError: If `vector_store` is not a `VectorStore` or DocumentIndex.
+        AssertionError: If `source_id_key` is None when cleanup mode is
+            incremental or `scoped_full` (should be unreachable).
     """
     # Behavior is deprecated, but we keep it for backwards compatibility.
     # # Warn only once per process.
@@ -763,7 +757,7 @@ async def aindex(
             type(destination).adelete == VectorStore.adelete
             and type(destination).delete == VectorStore.delete
         ):
-            # Checking if the vectorstore has overridden the default adelete or delete
+            # Checking if the VectorStore has overridden the default adelete or delete
             # methods implementation which just raises a NotImplementedError
             msg = "Vectorstore has not implemented the adelete or delete method"
             raise ValueError(msg)
@@ -821,11 +815,11 @@ async def aindex(
         ]
 
         if cleanup in {"incremental", "scoped_full"}:
-            # If the cleanup mode is incremental, source ids are required.
+            # If the cleanup mode is incremental, source IDs are required.
             for source_id, hashed_doc in zip(source_ids, hashed_docs, strict=False):
                 if source_id is None:
                     msg = (
-                        f"Source ids are required when cleanup mode is "
+                        f"Source IDs are required when cleanup mode is "
                         f"incremental or scoped_full. "
                         f"Document that starts with "
                         f"content: {hashed_doc.page_content[:100]} "
@@ -834,7 +828,7 @@ async def aindex(
                     raise ValueError(msg)
                 if cleanup == "scoped_full":
                     scoped_full_cleanup_source_ids.add(source_id)
-            # source ids cannot be None after for loop above.
+            # Source IDs cannot be None after for loop above.
             source_ids = cast("Sequence[str]", source_ids)
 
         exists_batch = await record_manager.aexists(
@@ -894,7 +888,7 @@ async def aindex(
         if cleanup == "incremental":
             # Get the uids of the documents that were not returned by the loader.
 
-            # mypy isn't good enough to determine that source ids cannot be None
+            # mypy isn't good enough to determine that source IDs cannot be None
             # here due to a check that's happening above, so we check again.
             for source_id in source_ids:
                 if source_id is None:

libs/core/langchain_core/indexing/base.py

@@ -25,7 +25,7 @@ class RecordManager(ABC):
     The record manager abstraction is used by the langchain indexing API.
 
     The record manager keeps track of which documents have been
-    written into a vectorstore and when they were written.
+    written into a `VectorStore` and when they were written.
 
     The indexing API computes hashes for each document and stores the hash
     together with the write time and the source id in the record manager.
@@ -37,7 +37,7 @@ class RecordManager(ABC):
     already been indexed, and to only index new documents.
 
     The main benefit of this abstraction is that it works across many vectorstores.
-    To be supported, a vectorstore needs to only support the ability to add and
+    To be supported, a `VectorStore` needs to only support the ability to add and
     delete documents by ID. Using the record manager, the indexing API will
     be able to delete outdated documents and avoid redundant indexing of documents
     that have already been indexed.
@@ -45,13 +45,13 @@ class RecordManager(ABC):
     The main constraints of this abstraction are:
 
     1. It relies on the time-stamps to determine which documents have been
-       indexed and which have not. This means that the time-stamps must be
-       monotonically increasing. The timestamp should be the timestamp
-       as measured by the server to minimize issues.
+        indexed and which have not. This means that the time-stamps must be
+        monotonically increasing. The timestamp should be the timestamp
+        as measured by the server to minimize issues.
     2. The record manager is currently implemented separately from the
-       vectorstore, which means that the overall system becomes distributed
-       and may create issues with consistency. For example, writing to
-       record manager succeeds, but corresponding writing to vectorstore fails.
+        vectorstore, which means that the overall system becomes distributed
+        and may create issues with consistency. For example, writing to
+        record manager succeeds, but corresponding writing to `VectorStore` fails.
     """
 
     def __init__(
@@ -61,7 +61,7 @@ class RecordManager(ABC):
         """Initialize the record manager.
 
         Args:
-            namespace (str): The namespace for the record manager.
+            namespace: The namespace for the record manager.
         """
         self.namespace = namespace
 
@@ -244,7 +244,7 @@ class InMemoryRecordManager(RecordManager):
         """Initialize the in-memory record manager.
 
         Args:
-            namespace (str): The namespace for the record manager.
+            namespace: The namespace for the record manager.
         """
         super().__init__(namespace)
         # Each key points to a dictionary
@@ -278,10 +278,10 @@ class InMemoryRecordManager(RecordManager):
         Args:
             keys: A list of record keys to upsert.
             group_ids: A list of group IDs corresponding to the keys.
-                Defaults to None.
+
             time_at_least: Optional timestamp. Implementation can use this
                 to optionally verify that the timestamp IS at least this time
-                in the system that stores. Defaults to None.
+                in the system that stores.
                 E.g., use to validate that the time in the postgres database
                 is equal to or larger than the given timestamp, if not
                 raise an error.
@@ -315,10 +315,10 @@ class InMemoryRecordManager(RecordManager):
         Args:
             keys: A list of record keys to upsert.
             group_ids: A list of group IDs corresponding to the keys.
-                Defaults to None.
+
             time_at_least: Optional timestamp. Implementation can use this
                 to optionally verify that the timestamp IS at least this time
-                in the system that stores. Defaults to None.
+                in the system that stores.
                 E.g., use to validate that the time in the postgres database
                 is equal to or larger than the given timestamp, if not
                 raise an error.
@@ -361,13 +361,13 @@ class InMemoryRecordManager(RecordManager):
 
         Args:
             before: Filter to list records updated before this time.
-                Defaults to None.
+
             after: Filter to list records updated after this time.
-                Defaults to None.
+
             group_ids: Filter to list records with specific group IDs.
-                Defaults to None.
+
             limit: optional limit on the number of records to return.
-                Defaults to None.
+
 
         Returns:
             A list of keys for the matching records.
@@ -397,13 +397,13 @@ class InMemoryRecordManager(RecordManager):
 
         Args:
             before: Filter to list records updated before this time.
-                Defaults to None.
+
             after: Filter to list records updated after this time.
-                Defaults to None.
+
             group_ids: Filter to list records with specific group IDs.
-                Defaults to None.
+
             limit: optional limit on the number of records to return.
-                Defaults to None.
+
 
         Returns:
             A list of keys for the matching records.
@@ -460,7 +460,7 @@ class UpsertResponse(TypedDict):
 class DeleteResponse(TypedDict, total=False):
     """A generic response for delete operation.
 
-    The fields in this response are optional and whether the vectorstore
+    The fields in this response are optional and whether the `VectorStore`
     returns them or not is up to the implementation.
     """
 
@@ -508,8 +508,6 @@ class DocumentIndex(BaseRetriever):
     1. Storing document in the index.
     2. Fetching document by ID.
     3. Searching for document using a query.
-
-    !!! version-added "Added in version 0.2.29"
     """
 
     @abc.abstractmethod
@@ -520,40 +518,40 @@ class DocumentIndex(BaseRetriever):
         if it is provided. If the ID is not provided, the upsert method is free
         to generate an ID for the content.
 
-        When an ID is specified and the content already exists in the vectorstore,
+        When an ID is specified and the content already exists in the `VectorStore`,
         the upsert method should update the content with the new data. If the content
-        does not exist, the upsert method should add the item to the vectorstore.
+        does not exist, the upsert method should add the item to the `VectorStore`.
 
         Args:
-            items: Sequence of documents to add to the vectorstore.
+            items: Sequence of documents to add to the `VectorStore`.
             **kwargs: Additional keyword arguments.
 
         Returns:
-            UpsertResponse: A response object that contains the list of IDs that were
-            successfully added or updated in the vectorstore and the list of IDs that
+            A response object that contains the list of IDs that were
+            successfully added or updated in the `VectorStore` and the list of IDs that
             failed to be added or updated.
         """
 
     async def aupsert(
         self, items: Sequence[Document], /, **kwargs: Any
     ) -> UpsertResponse:
-        """Add or update documents in the vectorstore. Async version of upsert.
+        """Add or update documents in the `VectorStore`. Async version of `upsert`.
 
         The upsert functionality should utilize the ID field of the item
         if it is provided. If the ID is not provided, the upsert method is free
         to generate an ID for the item.
 
-        When an ID is specified and the item already exists in the vectorstore,
+        When an ID is specified and the item already exists in the `VectorStore`,
         the upsert method should update the item with the new data. If the item
-        does not exist, the upsert method should add the item to the vectorstore.
+        does not exist, the upsert method should add the item to the `VectorStore`.
 
         Args:
-            items: Sequence of documents to add to the vectorstore.
+            items: Sequence of documents to add to the `VectorStore`.
             **kwargs: Additional keyword arguments.
 
         Returns:
-            UpsertResponse: A response object that contains the list of IDs that were
-            successfully added or updated in the vectorstore and the list of IDs that
+            A response object that contains the list of IDs that were
+            successfully added or updated in the `VectorStore` and the list of IDs that
             failed to be added or updated.
         """
         return await run_in_executor(
@@ -570,13 +568,13 @@ class DocumentIndex(BaseRetriever):
         Calling delete without any input parameters should raise a ValueError!
 
         Args:
-            ids: List of ids to delete.
-            kwargs: Additional keyword arguments. This is up to the implementation.
+            ids: List of IDs to delete.
+            **kwargs: Additional keyword arguments. This is up to the implementation.
                 For example, can include an option to delete the entire index,
                 or else issue a non-blocking delete etc.
 
         Returns:
-            DeleteResponse: A response object that contains the list of IDs that were
+            A response object that contains the list of IDs that were
             successfully deleted and the list of IDs that failed to be deleted.
         """
 
@@ -588,12 +586,12 @@ class DocumentIndex(BaseRetriever):
         Calling adelete without any input parameters should raise a ValueError!
 
         Args:
-            ids: List of ids to delete.
-            kwargs: Additional keyword arguments. This is up to the implementation.
+            ids: List of IDs to delete.
+            **kwargs: Additional keyword arguments. This is up to the implementation.
                 For example, can include an option to delete the entire index.
 
         Returns:
-            DeleteResponse: A response object that contains the list of IDs that were
+            A response object that contains the list of IDs that were
             successfully deleted and the list of IDs that failed to be deleted.
         """
         return await run_in_executor(
@@ -624,10 +622,10 @@ class DocumentIndex(BaseRetriever):
 
         Args:
             ids: List of IDs to get.
-            kwargs: Additional keyword arguments. These are up to the implementation.
+            **kwargs: Additional keyword arguments. These are up to the implementation.
 
         Returns:
-            list[Document]: List of documents that were found.
+            List of documents that were found.
         """
 
     async def aget(
@@ -650,10 +648,10 @@ class DocumentIndex(BaseRetriever):
 
         Args:
             ids: List of IDs to get.
-            kwargs: Additional keyword arguments. These are up to the implementation.
+            **kwargs: Additional keyword arguments. These are up to the implementation.
 
         Returns:
-            list[Document]: List of documents that were found.
+            List of documents that were found.
         """
         return await run_in_executor(
             None,

libs/core/langchain_core/indexing/in_memory.py

@@ -23,8 +23,6 @@ class InMemoryDocumentIndex(DocumentIndex):
 
     It provides a simple search API that returns documents by the number of
     counts the given query appears in the document.
-
-    !!! version-added "Added in version 0.2.29"
     """
 
     store: dict[str, Document] = Field(default_factory=dict)
@@ -64,10 +62,10 @@ class InMemoryDocumentIndex(DocumentIndex):
         """Delete by IDs.
 
         Args:
-            ids: List of ids to delete.
+            ids: List of IDs to delete.
 
         Raises:
-            ValueError: If ids is None.
+            ValueError: If IDs is None.
 
         Returns:
             A response object that contains the list of IDs that were successfully

libs/core/langchain_core/language_models/__init__.py

@@ -1,45 +1,30 @@
 """Language models.
 
-**Language Model** is a type of model that can generate text or complete
-text prompts.
+LangChain has two main classes to work with language models: chat models and
+"old-fashioned" LLMs.
 
-LangChain has two main classes to work with language models: **Chat Models**
-and "old-fashioned" **LLMs**.
-
-**Chat Models**
+**Chat models**
 
 Language models that use a sequence of messages as inputs and return chat messages
-as outputs (as opposed to using plain text). These are traditionally newer models (
-older models are generally LLMs, see below). Chat models support the assignment of
-distinct roles to conversation messages, helping to distinguish messages from the AI,
-users, and instructions such as system messages.
+as outputs (as opposed to using plain text).
 
-The key abstraction for chat models is `BaseChatModel`. Implementations
-should inherit from this class. Please see LangChain how-to guides with more
-information on how to implement a custom chat model.
+Chat models support the assignment of distinct roles to conversation messages, helping
+to distinguish messages from the AI, users, and instructions such as system messages.
 
-To implement a custom Chat Model, inherit from `BaseChatModel`. See
-the following guide for more information on how to implement a custom Chat Model:
+The key abstraction for chat models is `BaseChatModel`. Implementations should inherit
+from this class.
 
-https://python.langchain.com/docs/how_to/custom_chat_model/
+See existing [chat model integrations](https://docs.langchain.com/oss/python/integrations/chat).
 
 **LLMs**
 
 Language models that takes a string as input and returns a string.
-These are traditionally older models (newer models generally are Chat Models,
-see below).
-
-Although the underlying models are string in, string out, the LangChain wrappers
-also allow these models to take messages as input. This gives them the same interface
-as Chat Models. When messages are passed in as input, they will be formatted into a
-string under the hood before being passed to the underlying model.
-
-To implement a custom LLM, inherit from `BaseLLM` or `LLM`.
-Please see the following guide for more information on how to implement a custom LLM:
-
-https://python.langchain.com/docs/how_to/custom_llm/
-
+These are traditionally older models (newer models generally are chat models).
 
+Although the underlying models are string in, string out, the LangChain wrappers also
+allow these models to take messages as input. This gives them the same interface as
+chat models. When messages are passed in as input, they will be formatted into a string
+under the hood before being passed to the underlying model.
 """
 
 from typing import TYPE_CHECKING

libs/core/langchain_core/language_models/_utils.py

@@ -19,7 +19,7 @@ def is_openai_data_block(
 ) -> bool:
     """Check whether a block contains multimodal data in OpenAI Chat Completions format.
 
-    Supports both data and ID-style blocks (e.g. ``'file_data'`` and ``'file_id'``)
+    Supports both data and ID-style blocks (e.g. `'file_data'` and `'file_id'`)
 
     If additional keys are present, they are ignored / will not affect outcome as long
     as the required keys are present and valid.
@@ -30,12 +30,12 @@ def is_openai_data_block(
             - "image": Only match image_url blocks
             - "audio": Only match input_audio blocks
             - "file": Only match file blocks
-            If None, match any valid OpenAI data block type. Note that this means that
+            If `None`, match any valid OpenAI data block type. Note that this means that
             if the block has a valid OpenAI data type but the filter_ is set to a
             different type, this function will return False.
 
     Returns:
-        True if the block is a valid OpenAI data block and matches the filter_
+        `True` if the block is a valid OpenAI data block and matches the filter_
         (if provided).
 
     """
@@ -89,21 +89,20 @@ class ParsedDataUri(TypedDict):
 def _parse_data_uri(uri: str) -> ParsedDataUri | None:
     """Parse a data URI into its components.
 
-    If parsing fails, return None. If either MIME type or data is missing, return None.
+    If parsing fails, return `None`. If either MIME type or data is missing, return
+    `None`.
 
     Example:
+        ```python
+        data_uri = "data:image/jpeg;base64,/9j/4AAQSkZJRg..."
+        parsed = _parse_data_uri(data_uri)
 
-        .. code-block:: python
-
-            data_uri = "data:image/jpeg;base64,/9j/4AAQSkZJRg..."
-            parsed = _parse_data_uri(data_uri)
-
-            assert parsed == {
-                "source_type": "base64",
-                "mime_type": "image/jpeg",
-                "data": "/9j/4AAQSkZJRg...",
-            }
-
+        assert parsed == {
+            "source_type": "base64",
+            "mime_type": "image/jpeg",
+            "data": "/9j/4AAQSkZJRg...",
+        }
+        ```
     """
     regex = r"^data:(?P<mime_type>[^;]+);base64,(?P<data>.+)$"
     match = re.match(regex, uri)
@@ -133,14 +132,14 @@ def _normalize_messages(
     - LangChain v1 standard content blocks
 
     This function extends support to:
-    - `Audio <https://platform.openai.com/docs/api-reference/chat/create>`__ and
-        `file <https://platform.openai.com/docs/api-reference/files>`__ data in OpenAI
+    - `[Audio](https://platform.openai.com/docs/api-reference/chat/create) and
+        `[file](https://platform.openai.com/docs/api-reference/files) data in OpenAI
         Chat Completions format
         - Images are technically supported but we expect chat models to handle them
             directly; this may change in the future
     - LangChain v0 standard content blocks for backward compatibility
 
-    !!! warning "Behavior changed in 1.0.0"
+    !!! warning "Behavior changed in `langchain-core` 1.0.0"
         In previous versions, this function returned messages in LangChain v0 format.
         Now, it returns messages in LangChain v1 format, which upgraded chat models now
         expect to receive when passing back in message history. For backward
@@ -148,50 +147,50 @@ def _normalize_messages(
 
     ??? note "v0 Content Block Schemas"
 
-        ``URLContentBlock``:
+        `URLContentBlock`:
 
-        .. codeblock::
+        ```python
+        {
+            mime_type: NotRequired[str]
+            type: Literal['image', 'audio', 'file'],
+            source_type: Literal['url'],
+            url: str,
+        }
+        ```
 
-            {
-                mime_type: NotRequired[str]
-                type: Literal['image', 'audio', 'file'],
-                source_type: Literal['url'],
-                url: str,
-            }
+        `Base64ContentBlock`:
 
-        ``Base64ContentBlock``:
+        ```python
+        {
+            mime_type: NotRequired[str]
+            type: Literal['image', 'audio', 'file'],
+            source_type: Literal['base64'],
+            data: str,
+        }
+        ```
 
-        .. codeblock::
-
-            {
-                mime_type: NotRequired[str]
-                type: Literal['image', 'audio', 'file'],
-                source_type: Literal['base64'],
-                data: str,
-            }
-
-        ``IDContentBlock``:
+        `IDContentBlock`:
 
         (In practice, this was never used)
 
-        .. codeblock::
+        ```python
+        {
+            type: Literal["image", "audio", "file"],
+            source_type: Literal["id"],
+            id: str,
+        }
+        ```
 
-            {
-                type: Literal['image', 'audio', 'file'],
-                source_type: Literal['id'],
-                id: str,
-            }
+        `PlainTextContentBlock`:
 
-        ``PlainTextContentBlock``:
-
-        .. codeblock::
-
-            {
-                mime_type: NotRequired[str]
-                type: Literal['file'],
-                source_type: Literal['text'],
-                url: str,
-            }
+        ```python
+        {
+            mime_type: NotRequired[str]
+            type: Literal['file'],
+            source_type: Literal['text'],
+            url: str,
+        }
+        ```
 
     If a v1 message is passed in, it will be returned as-is, meaning it is safe to
     always pass in v1 messages to this function for assurance.
@@ -222,7 +221,7 @@ def _normalize_messages(
         "type": Literal['file'],
         "file": Union[
             {
-                "filename": Optional[str] = "$FILENAME",
+                "filename": str | None = "$FILENAME",
                 "file_data": str = "$BASE64_ENCODED_FILE",
             },
             {

libs/core/langchain_core/language_models/base.py

@@ -96,9 +96,16 @@ def _get_token_ids_default_method(text: str) -> list[int]:
 
 
 LanguageModelInput = PromptValue | str | Sequence[MessageLikeRepresentation]
+"""Input to a language model."""
+
 LanguageModelOutput = BaseMessage | str
+"""Output from a language model."""
+
 LanguageModelLike = Runnable[LanguageModelInput, LanguageModelOutput]
+"""Input/output interface for a language model."""
+
 LanguageModelOutputVar = TypeVar("LanguageModelOutputVar", AIMessage, str)
+"""Type variable for the output of a language model."""
 
 
 def _get_verbosity() -> bool:
@@ -110,29 +117,33 @@ class BaseLanguageModel(
 ):
     """Abstract base class for interfacing with language models.
 
-    All language model wrappers inherited from ``BaseLanguageModel``.
+    All language model wrappers inherited from `BaseLanguageModel`.
 
     """
 
     cache: BaseCache | bool | None = Field(default=None, exclude=True)
     """Whether to cache the response.
 
-    * If true, will use the global cache.
-    * If false, will not use a cache
-    * If None, will use the global cache if it's set, otherwise no cache.
-    * If instance of ``BaseCache``, will use the provided cache.
+    * If `True`, will use the global cache.
+    * If `False`, will not use a cache
+    * If `None`, will use the global cache if it's set, otherwise no cache.
+    * If instance of `BaseCache`, will use the provided cache.
 
     Caching is not currently supported for streaming methods of models.
-
     """
+
     verbose: bool = Field(default_factory=_get_verbosity, exclude=True, repr=False)
     """Whether to print out response text."""
+
     callbacks: Callbacks = Field(default=None, exclude=True)
     """Callbacks to add to the run trace."""
+
     tags: list[str] | None = Field(default=None, exclude=True)
     """Tags to add to the run trace."""
+
     metadata: dict[str, Any] | None = Field(default=None, exclude=True)
     """Metadata to add to the run trace."""
+
     custom_get_token_ids: Callable[[str], list[int]] | None = Field(
         default=None, exclude=True
     )
@@ -144,9 +155,9 @@ class BaseLanguageModel(
 
     @field_validator("verbose", mode="before")
     def set_verbose(cls, verbose: bool | None) -> bool:  # noqa: FBT001
-        """If verbose is None, set it.
+        """If verbose is `None`, set it.
 
-        This allows users to pass in None as verbose to access the global setting.
+        This allows users to pass in `None` as verbose to access the global setting.
 
         Args:
             verbose: The verbosity setting to use.
@@ -162,7 +173,7 @@ class BaseLanguageModel(
     @property
     @override
     def InputType(self) -> TypeAlias:
-        """Get the input type for this runnable."""
+        """Get the input type for this `Runnable`."""
         # This is a version of LanguageModelInput which replaces the abstract
         # base class BaseMessage with a union of its subclasses, which makes
         # for a much better schema.
@@ -186,22 +197,29 @@ class BaseLanguageModel(
         1. Take advantage of batched calls,
         2. Need more output from the model than just the top generated value,
         3. Are building chains that are agnostic to the underlying language model
-           type (e.g., pure text completion models vs chat models).
+            type (e.g., pure text completion models vs chat models).
 
         Args:
-            prompts: List of PromptValues. A PromptValue is an object that can be
-                converted to match the format of any language model (string for pure
-                text generation models and BaseMessages for chat models).
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of these substrings.
-            callbacks: Callbacks to pass through. Used for executing additional
-                functionality, such as logging or streaming, throughout generation.
-            **kwargs: Arbitrary additional keyword arguments. These are usually passed
-                to the model provider API call.
+            prompts: List of `PromptValue` objects.
+
+                A `PromptValue` is an object that can be converted to match the format
+                of any language model (string for pure text generation models and
+                `BaseMessage` objects for chat models).
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
+            callbacks: `Callbacks` to pass through.
+
+                Used for executing additional functionality, such as logging or
+                streaming, throughout generation.
+            **kwargs: Arbitrary additional keyword arguments.
+
+                These are usually passed to the model provider API call.
 
         Returns:
-            An LLMResult, which contains a list of candidate Generations for each input
-            prompt and additional model provider-specific output.
+            An `LLMResult`, which contains a list of candidate `Generation` objects for
+                each input prompt and additional model provider-specific output.
 
         """
 
@@ -223,22 +241,29 @@ class BaseLanguageModel(
         1. Take advantage of batched calls,
         2. Need more output from the model than just the top generated value,
         3. Are building chains that are agnostic to the underlying language model
-           type (e.g., pure text completion models vs chat models).
+            type (e.g., pure text completion models vs chat models).
 
         Args:
-            prompts: List of PromptValues. A PromptValue is an object that can be
-                converted to match the format of any language model (string for pure
-                text generation models and BaseMessages for chat models).
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of these substrings.
-            callbacks: Callbacks to pass through. Used for executing additional
-                functionality, such as logging or streaming, throughout generation.
-            **kwargs: Arbitrary additional keyword arguments. These are usually passed
-                to the model provider API call.
+            prompts: List of `PromptValue` objects.
+
+                A `PromptValue` is an object that can be converted to match the format
+                of any language model (string for pure text generation models and
+                `BaseMessage` objects for chat models).
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
+            callbacks: `Callbacks` to pass through.
+
+                Used for executing additional functionality, such as logging or
+                streaming, throughout generation.
+            **kwargs: Arbitrary additional keyword arguments.
+
+                These are usually passed to the model provider API call.
 
         Returns:
-            An ``LLMResult``, which contains a list of candidate Generations for each
-            input prompt and additional model provider-specific output.
+            An `LLMResult`, which contains a list of candidate `Generation` objects for
+                each input prompt and additional model provider-specific output.
 
         """
 
@@ -256,15 +281,14 @@ class BaseLanguageModel(
         return self.lc_attributes
 
     def get_token_ids(self, text: str) -> list[int]:
-        """Return the ordered ids of the tokens in a text.
+        """Return the ordered IDs of the tokens in a text.
 
         Args:
             text: The string input to tokenize.
 
         Returns:
-            A list of ids corresponding to the tokens in the text, in order they occur
-            in the text.
-
+            A list of IDs corresponding to the tokens in the text, in order they occur
+                in the text.
         """
         if self.custom_get_token_ids is not None:
             return self.custom_get_token_ids(text)
@@ -294,13 +318,13 @@ class BaseLanguageModel(
         Useful for checking if an input fits in a model's context window.
 
         !!! note
-            The base implementation of ``get_num_tokens_from_messages`` ignores tool
+            The base implementation of `get_num_tokens_from_messages` ignores tool
             schemas.
 
         Args:
             messages: The message inputs to tokenize.
-            tools: If provided, sequence of dict, ``BaseModel``, function, or
-                ``BaseTools`` to be converted to tool schemas.
+            tools: If provided, sequence of dict, `BaseModel`, function, or
+                `BaseTool` objects to be converted to tool schemas.
 
         Returns:
             The sum of the number of tokens across the messages.

libs/core/langchain_core/language_models/chat_models.py

@@ -15,6 +15,7 @@ from typing import TYPE_CHECKING, Any, Literal, cast
 from pydantic import BaseModel, ConfigDict, Field
 from typing_extensions import override
 
+from langchain_core._api.beta_decorator import beta
 from langchain_core.caches import BaseCache
 from langchain_core.callbacks import (
     AsyncCallbackManager,
@@ -75,6 +76,8 @@ from langchain_core.utils.utils import LC_ID_PREFIX, from_env
 if TYPE_CHECKING:
     import uuid
 
+    from langchain_model_profiles import ModelProfile  # type: ignore[import-untyped]
+
     from langchain_core.output_parsers.base import OutputParserLike
     from langchain_core.runnables import Runnable, RunnableConfig
     from langchain_core.tools import BaseTool
@@ -108,11 +111,11 @@ def _generate_response_from_error(error: BaseException) -> list[ChatGeneration]:
 
 
 def _format_for_tracing(messages: list[BaseMessage]) -> list[BaseMessage]:
-    """Format messages for tracing in ``on_chat_model_start``.
+    """Format messages for tracing in `on_chat_model_start`.
 
     - Update image content blocks to OpenAI Chat Completions format (backward
     compatibility).
-    - Add ``type`` key to content blocks that have a single key.
+    - Add `type` key to content blocks that have a single key.
 
     Args:
         messages: List of messages to format.
@@ -179,13 +182,13 @@ def generate_from_stream(stream: Iterator[ChatGenerationChunk]) -> ChatResult:
     """Generate from a stream.
 
     Args:
-        stream: Iterator of ``ChatGenerationChunk``.
+        stream: Iterator of `ChatGenerationChunk`.
 
     Raises:
         ValueError: If no generations are found in the stream.
 
     Returns:
-        ChatResult: Chat result.
+        Chat result.
 
     """
     generation = next(stream, None)
@@ -210,10 +213,10 @@ async def agenerate_from_stream(
     """Async generate from a stream.
 
     Args:
-        stream: Iterator of ``ChatGenerationChunk``.
+        stream: Iterator of `ChatGenerationChunk`.
 
     Returns:
-        ChatResult: Chat result.
+        Chat result.
 
     """
     chunks = [chunk async for chunk in stream]
@@ -240,79 +243,52 @@ def _format_ls_structured_output(ls_structured_output_format: dict | None) -> di
 
 
 class BaseChatModel(BaseLanguageModel[AIMessage], ABC):
-    """Base class for chat models.
+    r"""Base class for chat models.
 
     Key imperative methods:
         Methods that actually call the underlying model.
 
-        +---------------------------+----------------------------------------------------------------+---------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+
-        | Method                    | Input                                                          | Output                                                              | Description                                                                                      |
-        +===========================+================================================================+=====================================================================+==================================================================================================+
-        | `invoke`                  | str | list[dict | tuple | BaseMessage] | PromptValue           | BaseMessage                                                         | A single chat model call.                                                                        |
-        +---------------------------+----------------------------------------------------------------+---------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+
-        | `ainvoke`                 | '''                                                            | BaseMessage                                                         | Defaults to running invoke in an async executor.                                                 |
-        +---------------------------+----------------------------------------------------------------+---------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+
-        | `stream`                  | '''                                                            | Iterator[BaseMessageChunk]                                          | Defaults to yielding output of invoke.                                                           |
-        +---------------------------+----------------------------------------------------------------+---------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+
-        | `astream`                 | '''                                                            | AsyncIterator[BaseMessageChunk]                                     | Defaults to yielding output of ainvoke.                                                          |
-        +---------------------------+----------------------------------------------------------------+---------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+
-        | `astream_events`          | '''                                                            | AsyncIterator[StreamEvent]                                          | Event types: 'on_chat_model_start', 'on_chat_model_stream', 'on_chat_model_end'.                 |
-        +---------------------------+----------------------------------------------------------------+---------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+
-        | `batch`                   | list[''']                                                      | list[BaseMessage]                                                   | Defaults to running invoke in concurrent threads.                                                |
-        +---------------------------+----------------------------------------------------------------+---------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+
-        | `abatch`                  | list[''']                                                      | list[BaseMessage]                                                   | Defaults to running ainvoke in concurrent threads.                                               |
-        +---------------------------+----------------------------------------------------------------+---------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+
-        | `batch_as_completed`      | list[''']                                                      | Iterator[tuple[int, Union[BaseMessage, Exception]]]                 | Defaults to running invoke in concurrent threads.                                                |
-        +---------------------------+----------------------------------------------------------------+---------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+
-        | `abatch_as_completed`     | list[''']                                                      | AsyncIterator[tuple[int, Union[BaseMessage, Exception]]]            | Defaults to running ainvoke in concurrent threads.                                               |
-        +---------------------------+----------------------------------------------------------------+---------------------------------------------------------------------+--------------------------------------------------------------------------------------------------+
+        This table provides a brief overview of the main imperative methods. Please see the base `Runnable` reference for full documentation.
 
-        This table provides a brief overview of the main imperative methods. Please see the base Runnable reference for full documentation.
+        | Method                 | Input                                                        | Output                                                     | Description                                                                      |
+        | ---------------------- | ------------------------------------------------------------ | ---------------------------------------------------------- | -------------------------------------------------------------------------------- |
+        | `invoke`               | `str` \| `list[dict | tuple | BaseMessage]` \| `PromptValue` | `BaseMessage`                                              | A single chat model call.                                                        |
+        | `ainvoke`              | `'''`                                                        | `BaseMessage`                                              | Defaults to running `invoke` in an async executor.                               |
+        | `stream`               | `'''`                                                        | `Iterator[BaseMessageChunk]`                               | Defaults to yielding output of `invoke`.                                         |
+        | `astream`              | `'''`                                                        | `AsyncIterator[BaseMessageChunk]`                          | Defaults to yielding output of `ainvoke`.                                        |
+        | `astream_events`       | `'''`                                                        | `AsyncIterator[StreamEvent]`                               | Event types: `on_chat_model_start`, `on_chat_model_stream`, `on_chat_model_end`. |
+        | `batch`                | `list[''']`                                                  | `list[BaseMessage]`                                        | Defaults to running `invoke` in concurrent threads.                              |
+        | `abatch`               | `list[''']`                                                  | `list[BaseMessage]`                                        | Defaults to running `ainvoke` in concurrent threads.                             |
+        | `batch_as_completed`   | `list[''']`                                                  | `Iterator[tuple[int, Union[BaseMessage, Exception]]]`      | Defaults to running `invoke` in concurrent threads.                              |
+        | `abatch_as_completed`  | `list[''']`                                                  | `AsyncIterator[tuple[int, Union[BaseMessage, Exception]]]` | Defaults to running `ainvoke` in concurrent threads.                             |
 
     Key declarative methods:
-        Methods for creating another Runnable using the ChatModel.
-
-        +----------------------------------+-----------------------------------------------------------------------------------------------------------+
-        | Method                           | Description                                                                                               |
-        +==================================+===========================================================================================================+
-        | `bind_tools`                     | Create ChatModel that can call tools.                                                                     |
-        +----------------------------------+-----------------------------------------------------------------------------------------------------------+
-        | `with_structured_output`         | Create wrapper that structures model output using schema.                                                 |
-        +----------------------------------+-----------------------------------------------------------------------------------------------------------+
-        | `with_retry`                     | Create wrapper that retries model calls on failure.                                                       |
-        +----------------------------------+-----------------------------------------------------------------------------------------------------------+
-        | `with_fallbacks`                 | Create wrapper that falls back to other models on failure.                                                |
-        +----------------------------------+-----------------------------------------------------------------------------------------------------------+
-        | `configurable_fields`            | Specify init args of the model that can be configured at runtime via the RunnableConfig.                  |
-        +----------------------------------+-----------------------------------------------------------------------------------------------------------+
-        | `configurable_alternatives`      | Specify alternative models which can be swapped in at runtime via the RunnableConfig.                     |
-        +----------------------------------+-----------------------------------------------------------------------------------------------------------+
+        Methods for creating another `Runnable` using the chat model.
 
         This table provides a brief overview of the main declarative methods. Please see the reference for each method for full documentation.
 
+        | Method                       | Description                                                                                |
+        | ---------------------------- | ------------------------------------------------------------------------------------------ |
+        | `bind_tools`                 | Create chat model that can call tools.                                                     |
+        | `with_structured_output`     | Create wrapper that structures model output using schema.                                  |
+        | `with_retry`                 | Create wrapper that retries model calls on failure.                                        |
+        | `with_fallbacks`             | Create wrapper that falls back to other models on failure.                                 |
+        | `configurable_fields`        | Specify init args of the model that can be configured at runtime via the `RunnableConfig`. |
+        | `configurable_alternatives`  | Specify alternative models which can be swapped in at runtime via the `RunnableConfig`.    |
+
     Creating custom chat model:
         Custom chat model implementations should inherit from this class.
         Please reference the table below for information about which
         methods and properties are required or optional for implementations.
 
-        +----------------------------------+--------------------------------------------------------------------+-------------------+
-        | Method/Property                  | Description                                                        | Required/Optional |
-        +==================================+====================================================================+===================+
+        | Method/Property                  | Description                                                        | Required          |
+        | -------------------------------- | ------------------------------------------------------------------ | ----------------- |
         | `_generate`                      | Use to generate a chat result from a prompt                        | Required          |
-        +----------------------------------+--------------------------------------------------------------------+-------------------+
         | `_llm_type` (property)           | Used to uniquely identify the type of the model. Used for logging. | Required          |
-        +----------------------------------+--------------------------------------------------------------------+-------------------+
         | `_identifying_params` (property) | Represent model parameterization for tracing purposes.             | Optional          |
-        +----------------------------------+--------------------------------------------------------------------+-------------------+
         | `_stream`                        | Use to implement streaming                                         | Optional          |
-        +----------------------------------+--------------------------------------------------------------------+-------------------+
         | `_agenerate`                     | Use to implement a native async method                             | Optional          |
-        +----------------------------------+--------------------------------------------------------------------+-------------------+
         | `_astream`                       | Use to implement async version of `_stream`                        | Optional          |
-        +----------------------------------+--------------------------------------------------------------------+-------------------+
-
-        Follow the guide for more information on how to implement a custom Chat Model:
-        [Guide](https://python.langchain.com/docs/how_to/custom_chat_model/).
 
     """  # noqa: E501
 
@@ -322,41 +298,41 @@ class BaseChatModel(BaseLanguageModel[AIMessage], ABC):
     disable_streaming: bool | Literal["tool_calling"] = False
     """Whether to disable streaming for this model.
 
-    If streaming is bypassed, then ``stream()``/``astream()``/``astream_events()`` will
-    defer to ``invoke()``/``ainvoke()``.
+    If streaming is bypassed, then `stream`/`astream`/`astream_events` will
+    defer to `invoke`/`ainvoke`.
 
-    - If True, will always bypass streaming case.
-    - If ``'tool_calling'``, will bypass streaming case only when the model is called
-      with a ``tools`` keyword argument. In other words, LangChain will automatically
-      switch to non-streaming behavior (``invoke()``) only when the tools argument is
-      provided. This offers the best of both worlds.
-    - If False (default), will always use streaming case if available.
+    - If `True`, will always bypass streaming case.
+    - If `'tool_calling'`, will bypass streaming case only when the model is called
+        with a `tools` keyword argument. In other words, LangChain will automatically
+        switch to non-streaming behavior (`invoke`) only when the tools argument is
+        provided. This offers the best of both worlds.
+    - If `False` (Default), will always use streaming case if available.
 
-    The main reason for this flag is that code might be written using ``stream()`` and
+    The main reason for this flag is that code might be written using `stream` and
     a user may want to swap out a given model for another model whose the implementation
     does not properly support streaming.
-
     """
 
     output_version: str | None = Field(
         default_factory=from_env("LC_OUTPUT_VERSION", default=None)
     )
-    """Version of ``AIMessage`` output format to store in message content.
+    """Version of `AIMessage` output format to store in message content.
 
-    ``AIMessage.content_blocks`` will lazily parse the contents of ``content`` into a
+    `AIMessage.content_blocks` will lazily parse the contents of `content` into a
     standard format. This flag can be used to additionally store the standard format
     in message content, e.g., for serialization purposes.
 
     Supported values:
 
-    - ``"v0"``: provider-specific format in content (can lazily-parse with
-      ``.content_blocks``)
-    - ``"v1"``: standardized format in content (consistent with ``.content_blocks``)
+    - `'v0'`: provider-specific format in content (can lazily-parse with
+        `content_blocks`)
+    - `'v1'`: standardized format in content (consistent with `content_blocks`)
 
-    Partner packages (e.g., ``langchain-openai``) can also use this field to roll out
-    new content formats in a backward-compatible way.
+    Partner packages (e.g.,
+    [`langchain-openai`](https://pypi.org/project/langchain-openai)) can also use this
+    field to roll out new content formats in a backward-compatible way.
 
-    !!! version-added "Added in version 1.0"
+    !!! version-added "Added in `langchain-core` 1.0"
 
     """
 
@@ -373,7 +349,7 @@ class BaseChatModel(BaseLanguageModel[AIMessage], ABC):
     @property
     @override
     def OutputType(self) -> Any:
-        """Get the output type for this runnable."""
+        """Get the output type for this `Runnable`."""
         return AnyMessage
 
     def _convert_input(self, model_input: LanguageModelInput) -> PromptValue:
@@ -471,8 +447,10 @@ class BaseChatModel(BaseLanguageModel[AIMessage], ABC):
         if "stream" in kwargs:
             return kwargs["stream"]
 
-        if getattr(self, "streaming", False):
-            return True
+        if "streaming" in self.model_fields_set:
+            streaming_value = getattr(self, "streaming", None)
+            if isinstance(streaming_value, bool):
+                return streaming_value
 
         # Check if any streaming callback handlers have been passed in.
         handlers = run_manager.handlers if run_manager else []
@@ -730,9 +708,7 @@ class BaseChatModel(BaseLanguageModel[AIMessage], ABC):
             await run_manager.on_llm_error(err, response=LLMResult(generations=[]))
             raise err
 
-        await run_manager.on_llm_end(
-            LLMResult(generations=[[generation]]),
-        )
+        await run_manager.on_llm_end(LLMResult(generations=[[generation]]))
 
     # --- Custom methods ---
 
@@ -863,24 +839,29 @@ class BaseChatModel(BaseLanguageModel[AIMessage], ABC):
         1. Take advantage of batched calls,
         2. Need more output from the model than just the top generated value,
         3. Are building chains that are agnostic to the underlying language model
-           type (e.g., pure text completion models vs chat models).
+            type (e.g., pure text completion models vs chat models).
 
         Args:
             messages: List of list of messages.
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of these substrings.
-            callbacks: Callbacks to pass through. Used for executing additional
-                functionality, such as logging or streaming, throughout generation.
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
+            callbacks: `Callbacks` to pass through.
+
+                Used for executing additional functionality, such as logging or
+                streaming, throughout generation.
             tags: The tags to apply.
             metadata: The metadata to apply.
             run_name: The name of the run.
             run_id: The ID of the run.
-            **kwargs: Arbitrary additional keyword arguments. These are usually passed
-                to the model provider API call.
+            **kwargs: Arbitrary additional keyword arguments.
+
+                These are usually passed to the model provider API call.
 
         Returns:
-            An LLMResult, which contains a list of candidate Generations for each input
-            prompt and additional model provider-specific output.
+            An `LLMResult`, which contains a list of candidate `Generations` for each
+                input prompt and additional model provider-specific output.
 
         """
         ls_structured_output_format = kwargs.pop(
@@ -981,24 +962,29 @@ class BaseChatModel(BaseLanguageModel[AIMessage], ABC):
         1. Take advantage of batched calls,
         2. Need more output from the model than just the top generated value,
         3. Are building chains that are agnostic to the underlying language model
-           type (e.g., pure text completion models vs chat models).
+            type (e.g., pure text completion models vs chat models).
 
         Args:
             messages: List of list of messages.
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of these substrings.
-            callbacks: Callbacks to pass through. Used for executing additional
-                functionality, such as logging or streaming, throughout generation.
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
+            callbacks: `Callbacks` to pass through.
+
+                Used for executing additional functionality, such as logging or
+                streaming, throughout generation.
             tags: The tags to apply.
             metadata: The metadata to apply.
             run_name: The name of the run.
             run_id: The ID of the run.
-            **kwargs: Arbitrary additional keyword arguments. These are usually passed
-                to the model provider API call.
+            **kwargs: Arbitrary additional keyword arguments.
+
+                These are usually passed to the model provider API call.
 
         Returns:
-            An LLMResult, which contains a list of candidate Generations for each input
-            prompt and additional model provider-specific output.
+            An `LLMResult`, which contains a list of candidate `Generations` for each
+                input prompt and additional model provider-specific output.
 
         """
         ls_structured_output_format = kwargs.pop(
@@ -1527,125 +1513,136 @@ class BaseChatModel(BaseLanguageModel[AIMessage], ABC):
         Args:
             schema: The output schema. Can be passed in as:
 
-                - an OpenAI function/tool schema,
-                - a JSON Schema,
-                - a TypedDict class,
-                - or a Pydantic class.
+                - An OpenAI function/tool schema,
+                - A JSON Schema,
+                - A `TypedDict` class,
+                - Or a Pydantic class.
 
-                If ``schema`` is a Pydantic class then the model output will be a
+                If `schema` is a Pydantic class then the model output will be a
                 Pydantic instance of that class, and the model-generated fields will be
                 validated by the Pydantic class. Otherwise the model output will be a
-                dict and will not be validated. See `langchain_core.utils.function_calling.convert_to_openai_tool`
-                for more on how to properly specify types and descriptions of
-                schema fields when specifying a Pydantic or TypedDict class.
+                dict and will not be validated.
+
+                See `langchain_core.utils.function_calling.convert_to_openai_tool` for
+                more on how to properly specify types and descriptions of schema fields
+                when specifying a Pydantic or `TypedDict` class.
 
             include_raw:
-                If False then only the parsed structured output is returned. If
-                an error occurs during model output parsing it will be raised. If True
-                then both the raw model response (a BaseMessage) and the parsed model
-                response will be returned. If an error occurs during output parsing it
-                will be caught and returned as well. The final output is always a dict
-                with keys ``'raw'``, ``'parsed'``, and ``'parsing_error'``.
+                If `False` then only the parsed structured output is returned.
+
+                If an error occurs during model output parsing it will be raised.
+
+                If `True` then both the raw model response (a `BaseMessage`) and the
+                parsed model response will be returned.
+
+                If an error occurs during output parsing it will be caught and returned
+                as well.
+
+                The final output is always a `dict` with keys `'raw'`, `'parsed'`, and
+                `'parsing_error'`.
 
         Raises:
-            ValueError: If there are any unsupported ``kwargs``.
+            ValueError: If there are any unsupported `kwargs`.
             NotImplementedError: If the model does not implement
-                ``with_structured_output()``.
+                `with_structured_output()`.
 
         Returns:
-            A Runnable that takes same inputs as a `langchain_core.language_models.chat.BaseChatModel`.
+            A `Runnable` that takes same inputs as a
+                `langchain_core.language_models.chat.BaseChatModel`. If `include_raw` is
+                `False` and `schema` is a Pydantic class, `Runnable` outputs an instance
+                of `schema` (i.e., a Pydantic object). Otherwise, if `include_raw` is
+                `False` then `Runnable` outputs a `dict`.
 
-            If ``include_raw`` is False and ``schema`` is a Pydantic class, Runnable outputs
-            an instance of ``schema`` (i.e., a Pydantic object).
+                If `include_raw` is `True`, then `Runnable` outputs a `dict` with keys:
 
-            Otherwise, if ``include_raw`` is False then Runnable outputs a dict.
+                - `'raw'`: `BaseMessage`
+                - `'parsed'`: `None` if there was a parsing error, otherwise the type
+                    depends on the `schema` as described above.
+                - `'parsing_error'`: `BaseException | None`
 
-            If ``include_raw`` is True, then Runnable outputs a dict with keys:
+        Example: Pydantic schema (`include_raw=False`):
 
-            - ``'raw'``: BaseMessage
-            - ``'parsed'``: None if there was a parsing error, otherwise the type depends on the ``schema`` as described above.
-            - ``'parsing_error'``: Optional[BaseException]
-
-        Example: Pydantic schema (include_raw=False):
-            .. code-block:: python
-
-                from pydantic import BaseModel
+        ```python
+        from pydantic import BaseModel
 
 
-                class AnswerWithJustification(BaseModel):
-                    '''An answer to the user question along with justification for the answer.'''
+        class AnswerWithJustification(BaseModel):
+            '''An answer to the user question along with justification for the answer.'''
 
-                    answer: str
-                    justification: str
+            answer: str
+            justification: str
 
 
-                llm = ChatModel(model="model-name", temperature=0)
-                structured_llm = llm.with_structured_output(AnswerWithJustification)
+        model = ChatModel(model="model-name", temperature=0)
+        structured_model = model.with_structured_output(AnswerWithJustification)
 
-                structured_llm.invoke(
-                    "What weighs more a pound of bricks or a pound of feathers"
-                )
+        structured_model.invoke(
+            "What weighs more a pound of bricks or a pound of feathers"
+        )
 
-                # -> AnswerWithJustification(
-                #     answer='They weigh the same',
-                #     justification='Both a pound of bricks and a pound of feathers weigh one pound. The weight is the same, but the volume or density of the objects may differ.'
-                # )
+        # -> AnswerWithJustification(
+        #     answer='They weigh the same',
+        #     justification='Both a pound of bricks and a pound of feathers weigh one pound. The weight is the same, but the volume or density of the objects may differ.'
+        # )
+        ```
 
-        Example: Pydantic schema (include_raw=True):
-            .. code-block:: python
+        Example: Pydantic schema (`include_raw=True`):
 
-                from pydantic import BaseModel
+        ```python
+        from pydantic import BaseModel
 
 
-                class AnswerWithJustification(BaseModel):
-                    '''An answer to the user question along with justification for the answer.'''
+        class AnswerWithJustification(BaseModel):
+            '''An answer to the user question along with justification for the answer.'''
 
-                    answer: str
-                    justification: str
+            answer: str
+            justification: str
 
 
-                llm = ChatModel(model="model-name", temperature=0)
-                structured_llm = llm.with_structured_output(
-                    AnswerWithJustification, include_raw=True
-                )
+        model = ChatModel(model="model-name", temperature=0)
+        structured_model = model.with_structured_output(
+            AnswerWithJustification, include_raw=True
+        )
 
-                structured_llm.invoke(
-                    "What weighs more a pound of bricks or a pound of feathers"
-                )
-                # -> {
-                #     'raw': AIMessage(content='', additional_kwargs={'tool_calls': [{'id': 'call_Ao02pnFYXD6GN1yzc0uXPsvF', 'function': {'arguments': '{"answer":"They weigh the same.","justification":"Both a pound of bricks and a pound of feathers weigh one pound. The weight is the same, but the volume or density of the objects may differ."}', 'name': 'AnswerWithJustification'}, 'type': 'function'}]}),
-                #     'parsed': AnswerWithJustification(answer='They weigh the same.', justification='Both a pound of bricks and a pound of feathers weigh one pound. The weight is the same, but the volume or density of the objects may differ.'),
-                #     'parsing_error': None
-                # }
+        structured_model.invoke(
+            "What weighs more a pound of bricks or a pound of feathers"
+        )
+        # -> {
+        #     'raw': AIMessage(content='', additional_kwargs={'tool_calls': [{'id': 'call_Ao02pnFYXD6GN1yzc0uXPsvF', 'function': {'arguments': '{"answer":"They weigh the same.","justification":"Both a pound of bricks and a pound of feathers weigh one pound. The weight is the same, but the volume or density of the objects may differ."}', 'name': 'AnswerWithJustification'}, 'type': 'function'}]}),
+        #     'parsed': AnswerWithJustification(answer='They weigh the same.', justification='Both a pound of bricks and a pound of feathers weigh one pound. The weight is the same, but the volume or density of the objects may differ.'),
+        #     'parsing_error': None
+        # }
+        ```
 
-        Example: Dict schema (include_raw=False):
-            .. code-block:: python
+        Example: `dict` schema (`include_raw=False`):
 
-                from pydantic import BaseModel
-                from langchain_core.utils.function_calling import convert_to_openai_tool
+        ```python
+        from pydantic import BaseModel
+        from langchain_core.utils.function_calling import convert_to_openai_tool
 
 
-                class AnswerWithJustification(BaseModel):
-                    '''An answer to the user question along with justification for the answer.'''
+        class AnswerWithJustification(BaseModel):
+            '''An answer to the user question along with justification for the answer.'''
 
-                    answer: str
-                    justification: str
+            answer: str
+            justification: str
 
 
-                dict_schema = convert_to_openai_tool(AnswerWithJustification)
-                llm = ChatModel(model="model-name", temperature=0)
-                structured_llm = llm.with_structured_output(dict_schema)
+        dict_schema = convert_to_openai_tool(AnswerWithJustification)
+        model = ChatModel(model="model-name", temperature=0)
+        structured_model = model.with_structured_output(dict_schema)
 
-                structured_llm.invoke(
-                    "What weighs more a pound of bricks or a pound of feathers"
-                )
-                # -> {
-                #     'answer': 'They weigh the same',
-                #     'justification': 'Both a pound of bricks and a pound of feathers weigh one pound. The weight is the same, but the volume and density of the two substances differ.'
-                # }
+        structured_model.invoke(
+            "What weighs more a pound of bricks or a pound of feathers"
+        )
+        # -> {
+        #     'answer': 'They weigh the same',
+        #     'justification': 'Both a pound of bricks and a pound of feathers weigh one pound. The weight is the same, but the volume and density of the two substances differ.'
+        # }
+        ```
 
-        !!! warning "Behavior changed in 0.2.26"
-                Added support for TypedDict class.
+        !!! warning "Behavior changed in `langchain-core` 0.2.26"
+            Added support for `TypedDict` class.
 
         """  # noqa: E501
         _ = kwargs.pop("method", None)
@@ -1686,13 +1683,47 @@ class BaseChatModel(BaseLanguageModel[AIMessage], ABC):
             return RunnableMap(raw=llm) | parser_with_fallback
         return llm | output_parser
 
+    @property
+    @beta()
+    def profile(self) -> ModelProfile:
+        """Return profiling information for the model.
+
+        This property relies on the `langchain-model-profiles` package to retrieve chat
+        model capabilities, such as context window sizes and supported features.
+
+        Raises:
+            ImportError: If `langchain-model-profiles` is not installed.
+
+        Returns:
+            A `ModelProfile` object containing profiling information for the model.
+        """
+        try:
+            from langchain_model_profiles import get_model_profile  # noqa: PLC0415
+        except ImportError as err:
+            informative_error_message = (
+                "To access model profiling information, please install the "
+                "`langchain-model-profiles` package: "
+                "`pip install langchain-model-profiles`."
+            )
+            raise ImportError(informative_error_message) from err
+
+        provider_id = self._llm_type
+        model_name = (
+            # Model name is not standardized across integrations. New integrations
+            # should prefer `model`.
+            getattr(self, "model", None)
+            or getattr(self, "model_name", None)
+            or getattr(self, "model_id", "")
+        )
+        return get_model_profile(provider_id, model_name) or {}
+
 
 class SimpleChatModel(BaseChatModel):
     """Simplified implementation for a chat model to inherit from.
 
     !!! note
         This implementation is primarily here for backwards compatibility. For new
-        implementations, please use ``BaseChatModel`` directly.
+        implementations, please use `BaseChatModel` directly.
 
     """
 
@@ -1744,9 +1775,12 @@ def _gen_info_and_msg_metadata(
     }
 
 
+_MAX_CLEANUP_DEPTH = 100
+
+
 def _cleanup_llm_representation(serialized: Any, depth: int) -> None:
     """Remove non-serializable objects from a serialized object."""
-    if depth > 100:  # Don't cooperate for pathological cases
+    if depth > _MAX_CLEANUP_DEPTH:  # Don't cooperate for pathological cases
         return
 
     if not isinstance(serialized, dict):

libs/core/langchain_core/language_models/fake_chat_models.py

@@ -1,4 +1,4 @@
-"""Fake ChatModel for testing purposes."""
+"""Fake chat models for testing purposes."""
 
 import asyncio
 import re
@@ -19,7 +19,7 @@ from langchain_core.runnables import RunnableConfig
 
 
 class FakeMessagesListChatModel(BaseChatModel):
-    """Fake ``ChatModel`` for testing purposes."""
+    """Fake chat model for testing purposes."""
 
     responses: list[BaseMessage]
     """List of responses to **cycle** through in order."""
@@ -57,7 +57,7 @@ class FakeListChatModelError(Exception):
 
 
 class FakeListChatModel(SimpleChatModel):
-    """Fake ChatModel for testing purposes."""
+    """Fake chat model for testing purposes."""
 
     responses: list[str]
     """List of responses to **cycle** through in order."""
@@ -228,10 +228,10 @@ class GenericFakeChatModel(BaseChatModel):
     """Generic fake chat model that can be used to test the chat model interface.
 
     * Chat model should be usable in both sync and async tests
-    * Invokes ``on_llm_new_token`` to allow for testing of callback related code for new
-      tokens.
+    * Invokes `on_llm_new_token` to allow for testing of callback related code for new
+        tokens.
     * Includes logic to break messages into message chunk to facilitate testing of
-      streaming.
+        streaming.
 
     """
 
@@ -242,7 +242,7 @@ class GenericFakeChatModel(BaseChatModel):
     to make the interface more generic if needed.
 
     !!! note
-        if you want to pass a list, you can use ``iter`` to convert it to an iterator.
+        if you want to pass a list, you can use `iter` to convert it to an iterator.
 
     !!! warning
         Streaming is not implemented yet. We should try to implement it in the future by

libs/core/langchain_core/language_models/llms.py

@@ -1,4 +1,7 @@
-"""Base interface for large language models to expose."""
+"""Base interface for traditional large language models (LLMs) to expose.
+
+These are traditionally older models (newer models generally are chat models).
+"""
 
 from __future__ import annotations
 
@@ -74,8 +77,8 @@ def create_base_retry_decorator(
 
     Args:
         error_types: List of error types to retry on.
-        max_retries: Number of retries. Default is 1.
-        run_manager: Callback manager for the run. Default is None.
+        max_retries: Number of retries.
+        run_manager: Callback manager for the run.
 
     Returns:
         A retry decorator.
@@ -91,13 +94,17 @@ def create_base_retry_decorator(
             if isinstance(run_manager, AsyncCallbackManagerForLLMRun):
                 coro = run_manager.on_retry(retry_state)
                 try:
-                    loop = asyncio.get_event_loop()
-                    if loop.is_running():
-                        # TODO: Fix RUF006 - this task should have a reference
-                        #  and be awaited somewhere
-                        loop.create_task(coro)  # noqa: RUF006
-                    else:
+                    try:
+                        loop = asyncio.get_event_loop()
+                    except RuntimeError:
                         asyncio.run(coro)
+                    else:
+                        if loop.is_running():
+                            # TODO: Fix RUF006 - this task should have a reference
+                            #  and be awaited somewhere
+                            loop.create_task(coro)  # noqa: RUF006
+                        else:
+                            asyncio.run(coro)
                 except Exception as e:
                     _log_error_once(f"Error in on_retry: {e}")
             else:
@@ -153,7 +160,7 @@ def get_prompts(
     Args:
         params: Dictionary of parameters.
         prompts: List of prompts.
-        cache: Cache object. Default is None.
+        cache: Cache object.
 
     Returns:
         A tuple of existing prompts, llm_string, missing prompt indexes,
@@ -189,7 +196,7 @@ async def aget_prompts(
     Args:
         params: Dictionary of parameters.
         prompts: List of prompts.
-        cache: Cache object. Default is None.
+        cache: Cache object.
 
     Returns:
         A tuple of existing prompts, llm_string, missing prompt indexes,
@@ -299,7 +306,7 @@ class BaseLLM(BaseLanguageModel[str], ABC):
     @property
     @override
     def OutputType(self) -> type[str]:
-        """Get the input type for this runnable."""
+        """Get the input type for this `Runnable`."""
         return str
 
     def _convert_input(self, model_input: LanguageModelInput) -> PromptValue:
@@ -644,9 +651,12 @@ class BaseLLM(BaseLanguageModel[str], ABC):
 
         Args:
             prompts: The prompts to generate from.
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of the stop substrings.
-                If stop tokens are not supported consider raising NotImplementedError.
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
+
+                If stop tokens are not supported consider raising `NotImplementedError`.
             run_manager: Callback manager for the run.
 
         Returns:
@@ -664,9 +674,12 @@ class BaseLLM(BaseLanguageModel[str], ABC):
 
         Args:
             prompts: The prompts to generate from.
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of the stop substrings.
-                If stop tokens are not supported consider raising NotImplementedError.
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
+
+                If stop tokens are not supported consider raising `NotImplementedError`.
             run_manager: Callback manager for the run.
 
         Returns:
@@ -698,11 +711,14 @@ class BaseLLM(BaseLanguageModel[str], ABC):
 
         Args:
             prompt: The prompt to generate from.
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of these substrings.
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
             run_manager: Callback manager for the run.
-            **kwargs: Arbitrary additional keyword arguments. These are usually passed
-                to the model provider API call.
+            **kwargs: Arbitrary additional keyword arguments.
+
+                These are usually passed to the model provider API call.
 
         Yields:
             Generation chunks.
@@ -724,11 +740,14 @@ class BaseLLM(BaseLanguageModel[str], ABC):
 
         Args:
             prompt: The prompt to generate from.
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of these substrings.
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
             run_manager: Callback manager for the run.
-            **kwargs: Arbitrary additional keyword arguments. These are usually passed
-                to the model provider API call.
+            **kwargs: Arbitrary additional keyword arguments.
+
+                These are usually passed to the model provider API call.
 
         Yields:
             Generation chunks.
@@ -835,14 +854,18 @@ class BaseLLM(BaseLanguageModel[str], ABC):
         1. Take advantage of batched calls,
         2. Need more output from the model than just the top generated value,
         3. Are building chains that are agnostic to the underlying language model
-           type (e.g., pure text completion models vs chat models).
+            type (e.g., pure text completion models vs chat models).
 
         Args:
             prompts: List of string prompts.
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of these substrings.
-            callbacks: Callbacks to pass through. Used for executing additional
-                functionality, such as logging or streaming, throughout generation.
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
+            callbacks: `Callbacks` to pass through.
+
+                Used for executing additional functionality, such as logging or
+                streaming, throughout generation.
             tags: List of tags to associate with each prompt. If provided, the length
                 of the list must match the length of the prompts list.
             metadata: List of metadata dictionaries to associate with each prompt. If
@@ -852,17 +875,18 @@ class BaseLLM(BaseLanguageModel[str], ABC):
                 length of the list must match the length of the prompts list.
             run_id: List of run IDs to associate with each prompt. If provided, the
                 length of the list must match the length of the prompts list.
-            **kwargs: Arbitrary additional keyword arguments. These are usually passed
-                to the model provider API call.
+            **kwargs: Arbitrary additional keyword arguments.
+
+                These are usually passed to the model provider API call.
 
         Raises:
             ValueError: If prompts is not a list.
-            ValueError: If the length of ``callbacks``, ``tags``, ``metadata``, or
-                ``run_name`` (if provided) does not match the length of prompts.
+            ValueError: If the length of `callbacks`, `tags`, `metadata`, or
+                `run_name` (if provided) does not match the length of prompts.
 
         Returns:
-            An LLMResult, which contains a list of candidate Generations for each input
-                prompt and additional model provider-specific output.
+            An `LLMResult`, which contains a list of candidate `Generations` for each
+                input prompt and additional model provider-specific output.
         """
         if not isinstance(prompts, list):
             msg = (
@@ -1105,14 +1129,18 @@ class BaseLLM(BaseLanguageModel[str], ABC):
         1. Take advantage of batched calls,
         2. Need more output from the model than just the top generated value,
         3. Are building chains that are agnostic to the underlying language model
-           type (e.g., pure text completion models vs chat models).
+            type (e.g., pure text completion models vs chat models).
 
         Args:
             prompts: List of string prompts.
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of these substrings.
-            callbacks: Callbacks to pass through. Used for executing additional
-                functionality, such as logging or streaming, throughout generation.
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
+            callbacks: `Callbacks` to pass through.
+
+                Used for executing additional functionality, such as logging or
+                streaming, throughout generation.
             tags: List of tags to associate with each prompt. If provided, the length
                 of the list must match the length of the prompts list.
             metadata: List of metadata dictionaries to associate with each prompt. If
@@ -1122,16 +1150,17 @@ class BaseLLM(BaseLanguageModel[str], ABC):
                 length of the list must match the length of the prompts list.
             run_id: List of run IDs to associate with each prompt. If provided, the
                 length of the list must match the length of the prompts list.
-            **kwargs: Arbitrary additional keyword arguments. These are usually passed
-                to the model provider API call.
+            **kwargs: Arbitrary additional keyword arguments.
+
+                These are usually passed to the model provider API call.
 
         Raises:
-            ValueError: If the length of ``callbacks``, ``tags``, ``metadata``, or
-                ``run_name`` (if provided) does not match the length of prompts.
+            ValueError: If the length of `callbacks`, `tags`, `metadata`, or
+                `run_name` (if provided) does not match the length of prompts.
 
         Returns:
-            An LLMResult, which contains a list of candidate Generations for each input
-                prompt and additional model provider-specific output.
+            An `LLMResult`, which contains a list of candidate `Generations` for each
+                input prompt and additional model provider-specific output.
         """
         if isinstance(metadata, list):
             metadata = [
@@ -1340,11 +1369,9 @@ class BaseLLM(BaseLanguageModel[str], ABC):
             ValueError: If the file path is not a string or Path object.
 
         Example:
-
-            .. code-block:: python
-
-                llm.save(file_path="path/llm.yaml")
-
+            ```python
+            llm.save(file_path="path/llm.yaml")
+            ```
         """
         # Convert file to Path object.
         save_path = Path(file_path)
@@ -1389,11 +1416,6 @@ class LLM(BaseLLM):
         `astream` will use `_astream` if provided, otherwise it will implement
         a fallback behavior that will use `_stream` if `_stream` is implemented,
         and use `_acall` if `_stream` is not implemented.
-
-    Please see the following guide for more information on how to
-    implement a custom LLM:
-
-    https://python.langchain.com/docs/how_to/custom_llm/
     """
 
     @abstractmethod
@@ -1410,12 +1432,16 @@ class LLM(BaseLLM):
 
         Args:
             prompt: The prompt to generate from.
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of the stop substrings.
-                If stop tokens are not supported consider raising NotImplementedError.
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
+
+                If stop tokens are not supported consider raising `NotImplementedError`.
             run_manager: Callback manager for the run.
-            **kwargs: Arbitrary additional keyword arguments. These are usually passed
-                to the model provider API call.
+            **kwargs: Arbitrary additional keyword arguments.
+
+                These are usually passed to the model provider API call.
 
         Returns:
             The model output as a string. SHOULD NOT include the prompt.
@@ -1436,12 +1462,16 @@ class LLM(BaseLLM):
 
         Args:
             prompt: The prompt to generate from.
-            stop: Stop words to use when generating. Model output is cut off at the
-                first occurrence of any of the stop substrings.
-                If stop tokens are not supported consider raising NotImplementedError.
+            stop: Stop words to use when generating.
+
+                Model output is cut off at the first occurrence of any of these
+                substrings.
+
+                If stop tokens are not supported consider raising `NotImplementedError`.
             run_manager: Callback manager for the run.
-            **kwargs: Arbitrary additional keyword arguments. These are usually passed
-                to the model provider API call.
+            **kwargs: Arbitrary additional keyword arguments.
+
+                These are usually passed to the model provider API call.
 
         Returns:
             The model output as a string. SHOULD NOT include the prompt.

libs/core/langchain_core/load/dump.py

@@ -17,7 +17,7 @@ def default(obj: Any) -> Any:
         obj: The object to serialize to json if it is a Serializable object.
 
     Returns:
-        A json serializable object or a SerializedNotImplemented object.
+        A JSON serializable object or a SerializedNotImplemented object.
     """
     if isinstance(obj, Serializable):
         return obj.to_json()
@@ -38,17 +38,16 @@ def _dump_pydantic_models(obj: Any) -> Any:
 
 
 def dumps(obj: Any, *, pretty: bool = False, **kwargs: Any) -> str:
-    """Return a json string representation of an object.
+    """Return a JSON string representation of an object.
 
     Args:
         obj: The object to dump.
-        pretty: Whether to pretty print the json. If true, the json will be
-            indented with 2 spaces (if no indent is provided as part of kwargs).
-            Default is False.
-        kwargs: Additional arguments to pass to json.dumps
+        pretty: Whether to pretty print the json. If `True`, the json will be
+            indented with 2 spaces (if no indent is provided as part of `kwargs`).
+        **kwargs: Additional arguments to pass to `json.dumps`
 
     Returns:
-        A json string representation of the object.
+        A JSON string representation of the object.
 
     Raises:
         ValueError: If `default` is passed as a kwarg.
@@ -72,14 +71,12 @@ def dumps(obj: Any, *, pretty: bool = False, **kwargs: Any) -> str:
 def dumpd(obj: Any) -> Any:
     """Return a dict representation of an object.
 
-    !!! note
-        Unfortunately this function is not as efficient as it could be because it first
-        dumps the object to a json string and then loads it back into a dictionary.
-
     Args:
         obj: The object to dump.
 
     Returns:
-        dictionary that can be serialized to json using json.dumps
+        Dictionary that can be serialized to json using `json.dumps`.
     """
+    # Unfortunately this function is not as efficient as it could be because it first
+    # dumps the object to a json string and then loads it back into a dictionary.
     return json.loads(dumps(obj))

libs/core/langchain_core/load/load.py

@@ -63,16 +63,13 @@ class Reviver:
         Args:
             secrets_map: A map of secrets to load. If a secret is not found in
                 the map, it will be loaded from the environment if `secrets_from_env`
-                is True. Defaults to None.
+                is True.
             valid_namespaces: A list of additional namespaces (modules)
-                to allow to be deserialized. Defaults to None.
+                to allow to be deserialized.
             secrets_from_env: Whether to load secrets from the environment.
-                Defaults to True.
             additional_import_mappings: A dictionary of additional namespace mappings
                 You can use this to override default mappings or add new mappings.
-                Defaults to None.
             ignore_unserializable_fields: Whether to ignore unserializable fields.
-                Defaults to False.
         """
         self.secrets_from_env = secrets_from_env
         self.secrets_map = secrets_map or {}
@@ -107,7 +104,7 @@ class Reviver:
             ValueError: If trying to deserialize something that cannot
                 be deserialized in the current version of langchain-core.
             NotImplementedError: If the object is not implemented and
-                ``ignore_unserializable_fields`` is False.
+                `ignore_unserializable_fields` is False.
         """
         if (
             value.get("lc") == 1
@@ -200,16 +197,13 @@ def loads(
         text: The string to load.
         secrets_map: A map of secrets to load. If a secret is not found in
             the map, it will be loaded from the environment if `secrets_from_env`
-            is True. Defaults to None.
+            is True.
         valid_namespaces: A list of additional namespaces (modules)
-            to allow to be deserialized. Defaults to None.
+            to allow to be deserialized.
         secrets_from_env: Whether to load secrets from the environment.
-            Defaults to True.
         additional_import_mappings: A dictionary of additional namespace mappings
             You can use this to override default mappings or add new mappings.
-            Defaults to None.
         ignore_unserializable_fields: Whether to ignore unserializable fields.
-            Defaults to False.
 
     Returns:
         Revived LangChain objects.
@@ -245,16 +239,13 @@ def load(
         obj: The object to load.
         secrets_map: A map of secrets to load. If a secret is not found in
             the map, it will be loaded from the environment if `secrets_from_env`
-            is True. Defaults to None.
+            is True.
         valid_namespaces: A list of additional namespaces (modules)
-            to allow to be deserialized. Defaults to None.
+            to allow to be deserialized.
         secrets_from_env: Whether to load secrets from the environment.
-            Defaults to True.
         additional_import_mappings: A dictionary of additional namespace mappings
             You can use this to override default mappings or add new mappings.
-            Defaults to None.
         ignore_unserializable_fields: Whether to ignore unserializable fields.
-            Defaults to False.
 
     Returns:
         Revived LangChain objects.

libs/core/langchain_core/load/serializable.py

@@ -25,16 +25,16 @@ class BaseSerialized(TypedDict):
     id: list[str]
     """The unique identifier of the object."""
     name: NotRequired[str]
-    """The name of the object. Optional."""
+    """The name of the object."""
     graph: NotRequired[dict[str, Any]]
-    """The graph of the object. Optional."""
+    """The graph of the object."""
 
 
 class SerializedConstructor(BaseSerialized):
     """Serialized constructor."""
 
     type: Literal["constructor"]
-    """The type of the object. Must be ``'constructor'``."""
+    """The type of the object. Must be `'constructor'`."""
     kwargs: dict[str, Any]
     """The constructor arguments."""
 
@@ -43,16 +43,16 @@ class SerializedSecret(BaseSerialized):
     """Serialized secret."""
 
     type: Literal["secret"]
-    """The type of the object. Must be ``'secret'``."""
+    """The type of the object. Must be `'secret'`."""
 
 
 class SerializedNotImplemented(BaseSerialized):
     """Serialized not implemented."""
 
     type: Literal["not_implemented"]
-    """The type of the object. Must be ``'not_implemented'``."""
+    """The type of the object. Must be `'not_implemented'`."""
     repr: str | None
-    """The representation of the object. Optional."""
+    """The representation of the object."""
 
 
 def try_neq_default(value: Any, key: str, model: BaseModel) -> bool:
@@ -61,7 +61,7 @@ def try_neq_default(value: Any, key: str, model: BaseModel) -> bool:
     Args:
         value: The value.
         key: The key.
-        model: The pydantic model.
+        model: The Pydantic model.
 
     Returns:
         Whether the value is different from the default.
@@ -92,19 +92,22 @@ class Serializable(BaseModel, ABC):
 
     It relies on the following methods and properties:
 
-    - ``is_lc_serializable``: Is this class serializable?
-      By design, even if a class inherits from Serializable, it is not serializable by
-      default. This is to prevent accidental serialization of objects that should not
-      be serialized.
-    - ``get_lc_namespace``: Get the namespace of the langchain object.
-      During deserialization, this namespace is used to identify
-      the correct class to instantiate.
-      Please see the ``Reviver`` class in ``langchain_core.load.load`` for more details.
-      During deserialization an additional mapping is handle
-      classes that have moved or been renamed across package versions.
-    - ``lc_secrets``: A map of constructor argument names to secret ids.
-    - ``lc_attributes``: List of additional attribute names that should be included
-      as part of the serialized representation.
+    - `is_lc_serializable`: Is this class serializable?
+        By design, even if a class inherits from `Serializable`, it is not serializable
+        by default. This is to prevent accidental serialization of objects that should
+        not be serialized.
+    - `get_lc_namespace`: Get the namespace of the LangChain object.
+
+        During deserialization, this namespace is used to identify
+        the correct class to instantiate.
+
+        Please see the `Reviver` class in `langchain_core.load.load` for more details.
+        During deserialization an additional mapping is handle classes that have moved
+        or been renamed across package versions.
+
+    - `lc_secrets`: A map of constructor argument names to secret ids.
+    - `lc_attributes`: List of additional attribute names that should be included
+        as part of the serialized representation.
     """
 
     # Remove default BaseModel init docstring.
@@ -116,24 +119,24 @@ class Serializable(BaseModel, ABC):
     def is_lc_serializable(cls) -> bool:
         """Is this class serializable?
 
-        By design, even if a class inherits from Serializable, it is not serializable by
-        default. This is to prevent accidental serialization of objects that should not
-        be serialized.
+        By design, even if a class inherits from `Serializable`, it is not serializable
+        by default. This is to prevent accidental serialization of objects that should
+        not be serialized.
 
         Returns:
-            Whether the class is serializable. Default is False.
+            Whether the class is serializable. Default is `False`.
         """
         return False
 
     @classmethod
     def get_lc_namespace(cls) -> list[str]:
-        """Get the namespace of the langchain object.
+        """Get the namespace of the LangChain object.
 
         For example, if the class is `langchain.llms.openai.OpenAI`, then the
-        namespace is ["langchain", "llms", "openai"]
+        namespace is `["langchain", "llms", "openai"]`
 
         Returns:
-            The namespace as a list of strings.
+            The namespace.
         """
         return cls.__module__.split(".")
 
@@ -141,8 +144,7 @@ class Serializable(BaseModel, ABC):
     def lc_secrets(self) -> dict[str, str]:
         """A map of constructor argument names to secret ids.
 
-        For example,
-            {"openai_api_key": "OPENAI_API_KEY"}
+        For example, `{"openai_api_key": "OPENAI_API_KEY"}`
         """
         return {}
 
@@ -151,6 +153,7 @@ class Serializable(BaseModel, ABC):
         """List of attribute names that should be included in the serialized kwargs.
 
         These attributes must be accepted by the constructor.
+
         Default is an empty dictionary.
         """
         return {}
@@ -161,8 +164,9 @@ class Serializable(BaseModel, ABC):
 
         The unique identifier is a list of strings that describes the path
         to the object.
+
         For example, for the class `langchain.llms.openai.OpenAI`, the id is
-        ["langchain", "llms", "openai", "OpenAI"].
+        `["langchain", "llms", "openai", "OpenAI"]`.
         """
         # Pydantic generics change the class name. So we need to do the following
         if (
@@ -193,7 +197,7 @@ class Serializable(BaseModel, ABC):
             ValueError: If the class has deprecated attributes.
 
         Returns:
-            A json serializable object or a SerializedNotImplemented object.
+            A JSON serializable object or a `SerializedNotImplemented` object.
         """
         if not self.is_lc_serializable():
             return self.to_json_not_implemented()
@@ -268,7 +272,7 @@ class Serializable(BaseModel, ABC):
         """Serialize a "not implemented" object.
 
         Returns:
-            SerializedNotImplemented.
+            `SerializedNotImplemented`.
         """
         return to_json_not_implemented(self)
 
@@ -283,8 +287,8 @@ def _is_field_useful(inst: Serializable, key: str, value: Any) -> bool:
 
     Returns:
         Whether the field is useful. If the field is required, it is useful.
-        If the field is not required, it is useful if the value is not None.
-        If the field is not required and the value is None, it is useful if the
+        If the field is not required, it is useful if the value is not `None`.
+        If the field is not required and the value is `None`, it is useful if the
         default value is different from the value.
     """
     field = type(inst).model_fields.get(key)
@@ -343,10 +347,10 @@ def to_json_not_implemented(obj: object) -> SerializedNotImplemented:
     """Serialize a "not implemented" object.
 
     Args:
-        obj: object to serialize.
+        obj: Object to serialize.
 
     Returns:
-        SerializedNotImplemented
+        `SerializedNotImplemented`
     """
     id_: list[str] = []
     try:

libs/core/langchain_core/messages/__init__.py

@@ -1,19 +1,4 @@
-"""**Messages** are objects used in prompts and chat conversations.
-
-**Class hierarchy:**
-
-.. code-block::
-
-    BaseMessage --> SystemMessage, AIMessage, HumanMessage, ChatMessage, FunctionMessage, ToolMessage
-                --> BaseMessageChunk --> SystemMessageChunk, AIMessageChunk, HumanMessageChunk, ChatMessageChunk, FunctionMessageChunk, ToolMessageChunk
-
-**Main helpers:**
-
-.. code-block::
-
-    ChatPromptTemplate
-
-"""  # noqa: E501
+"""**Messages** are objects used in prompts and chat conversations."""
 
 from typing import TYPE_CHECKING
 
@@ -24,6 +9,9 @@ if TYPE_CHECKING:
     from langchain_core.messages.ai import (
         AIMessage,
         AIMessageChunk,
+        InputTokenDetails,
+        OutputTokenDetails,
+        UsageMetadata,
     )
     from langchain_core.messages.base import (
         BaseMessage,
@@ -102,10 +90,12 @@ __all__ = (
     "HumanMessage",
     "HumanMessageChunk",
     "ImageContentBlock",
+    "InputTokenDetails",
     "InvalidToolCall",
     "MessageLikeRepresentation",
     "NonStandardAnnotation",
     "NonStandardContentBlock",
+    "OutputTokenDetails",
     "PlainTextContentBlock",
     "ReasoningContentBlock",
     "RemoveMessage",
@@ -119,6 +109,7 @@ __all__ = (
     "ToolCallChunk",
     "ToolMessage",
     "ToolMessageChunk",
+    "UsageMetadata",
     "VideoContentBlock",
     "_message_from_dict",
     "convert_to_messages",
@@ -160,6 +151,7 @@ _dynamic_imports = {
     "HumanMessageChunk": "human",
     "NonStandardAnnotation": "content",
     "NonStandardContentBlock": "content",
+    "OutputTokenDetails": "ai",
     "PlainTextContentBlock": "content",
     "ReasoningContentBlock": "content",
     "RemoveMessage": "modifier",
@@ -169,12 +161,14 @@ _dynamic_imports = {
     "SystemMessage": "system",
     "SystemMessageChunk": "system",
     "ImageContentBlock": "content",
+    "InputTokenDetails": "ai",
     "InvalidToolCall": "tool",
     "TextContentBlock": "content",
     "ToolCall": "tool",
     "ToolCallChunk": "tool",
     "ToolMessage": "tool",
     "ToolMessageChunk": "tool",
+    "UsageMetadata": "ai",
     "VideoContentBlock": "content",
     "AnyMessage": "utils",
     "MessageLikeRepresentation": "utils",

libs/core/langchain_core/messages/ai.py

@@ -40,18 +40,18 @@ class InputTokenDetails(TypedDict, total=False):
     Does *not* need to sum to full input token count. Does *not* need to have all keys.
 
     Example:
-        .. code-block:: python
-
-            {
-                "audio": 10,
-                "cache_creation": 200,
-                "cache_read": 100,
-            }
-
-    !!! version-added "Added in version 0.3.9"
+        ```python
+        {
+            "audio": 10,
+            "cache_creation": 200,
+            "cache_read": 100,
+        }
+        ```
 
     May also hold extra provider-specific keys.
 
+    !!! version-added "Added in `langchain-core` 0.3.9"
+
     """
 
     audio: int
@@ -76,14 +76,16 @@ class OutputTokenDetails(TypedDict, total=False):
     Does *not* need to sum to full output token count. Does *not* need to have all keys.
 
     Example:
-        .. code-block:: python
+        ```python
+        {
+            "audio": 10,
+            "reasoning": 200,
+        }
+        ```
 
-            {
-                "audio": 10,
-                "reasoning": 200,
-            }
+    May also hold extra provider-specific keys.
 
-    !!! version-added "Added in version 0.3.9"
+    !!! version-added "Added in `langchain-core` 0.3.9"
 
     """
 
@@ -104,26 +106,30 @@ class UsageMetadata(TypedDict):
     This is a standard representation of token usage that is consistent across models.
 
     Example:
-        .. code-block:: python
+        ```python
+        {
+            "input_tokens": 350,
+            "output_tokens": 240,
+            "total_tokens": 590,
+            "input_token_details": {
+                "audio": 10,
+                "cache_creation": 200,
+                "cache_read": 100,
+            },
+            "output_token_details": {
+                "audio": 10,
+                "reasoning": 200,
+            },
+        }
+        ```
 
-            {
-                "input_tokens": 350,
-                "output_tokens": 240,
-                "total_tokens": 590,
-                "input_token_details": {
-                    "audio": 10,
-                    "cache_creation": 200,
-                    "cache_read": 100,
-                },
-                "output_token_details": {
-                    "audio": 10,
-                    "reasoning": 200,
-                },
-            }
-
-    !!! warning "Behavior changed in 0.3.9"
-        Added ``input_token_details`` and ``output_token_details``.
+    !!! warning "Behavior changed in `langchain-core` 0.3.9"
+        Added `input_token_details` and `output_token_details`.
 
+    !!! note "LangSmith SDK"
+        The LangSmith SDK also has a `UsageMetadata` class. While the two share fields,
+        LangSmith's `UsageMetadata` has additional fields to capture cost information
+        used by the LangSmith platform.
     """
 
     input_tokens: int
@@ -131,7 +137,7 @@ class UsageMetadata(TypedDict):
     output_tokens: int
     """Count of output (or completion) tokens. Sum of all output token types."""
     total_tokens: int
-    """Total token count. Sum of input_tokens + output_tokens."""
+    """Total token count. Sum of `input_tokens` + `output_tokens`."""
     input_token_details: NotRequired[InputTokenDetails]
     """Breakdown of input token counts.
 
@@ -141,34 +147,31 @@ class UsageMetadata(TypedDict):
     """Breakdown of output token counts.
 
     Does *not* need to sum to full output token count. Does *not* need to have all keys.
-
     """
 
 
 class AIMessage(BaseMessage):
     """Message from an AI.
 
-    AIMessage is returned from a chat model as a response to a prompt.
+    An `AIMessage` is returned from a chat model as a response to a prompt.
 
     This message represents the output of the model and consists of both
-    the raw output as returned by the model together standardized fields
+    the raw output as returned by the model and standardized fields
     (e.g., tool calls, usage metadata) added by the LangChain framework.
-
     """
 
     tool_calls: list[ToolCall] = []
-    """If provided, tool calls associated with the message."""
+    """If present, tool calls associated with the message."""
     invalid_tool_calls: list[InvalidToolCall] = []
-    """If provided, tool calls with parsing errors associated with the message."""
+    """If present, tool calls with parsing errors associated with the message."""
     usage_metadata: UsageMetadata | None = None
-    """If provided, usage metadata for a message, such as token counts.
+    """If present, usage metadata for a message, such as token counts.
 
     This is a standard representation of token usage that is consistent across models.
-
     """
 
     type: Literal["ai"] = "ai"
-    """The type of the message (used for deserialization). Defaults to "ai"."""
+    """The type of the message (used for deserialization)."""
 
     @overload
     def __init__(
@@ -191,14 +194,14 @@ class AIMessage(BaseMessage):
         content_blocks: list[types.ContentBlock] | None = None,
         **kwargs: Any,
     ) -> None:
-        """Initialize ``AIMessage``.
+        """Initialize an `AIMessage`.
 
-        Specify ``content`` as positional arg or ``content_blocks`` for typing.
+        Specify `content` as positional arg or `content_blocks` for typing.
 
         Args:
             content: The content of the message.
             content_blocks: Typed standard content.
-            kwargs: Additional arguments to pass to the parent class.
+            **kwargs: Additional arguments to pass to the parent class.
         """
         if content_blocks is not None:
             # If there are tool calls in content_blocks, but not in tool_calls, add them
@@ -217,7 +220,11 @@ class AIMessage(BaseMessage):
 
     @property
     def lc_attributes(self) -> dict:
-        """Attrs to be serialized even if they are derived from other init args."""
+        """Attributes to be serialized.
+
+        Includes all attributes, even if they are derived from other initialization
+        arguments.
+        """
         return {
             "tool_calls": self.tool_calls,
             "invalid_tool_calls": self.invalid_tool_calls,
@@ -225,11 +232,11 @@ class AIMessage(BaseMessage):
 
     @property
     def content_blocks(self) -> list[types.ContentBlock]:
-        """Return content blocks of the message.
+        """Return standard, typed `ContentBlock` dicts from the message.
 
         If the message has a known model provider, use the provider-specific translator
         first before falling back to best-effort parsing. For details, see the property
-        on ``BaseMessage``.
+        on `BaseMessage`.
         """
         if self.response_metadata.get("output_version") == "v1":
             return cast("list[types.ContentBlock]", self.content)
@@ -331,11 +338,10 @@ class AIMessage(BaseMessage):
 
     @override
     def pretty_repr(self, html: bool = False) -> str:
-        """Return a pretty representation of the message.
+        """Return a pretty representation of the message for display.
 
         Args:
             html: Whether to return an HTML-formatted string.
-                 Defaults to False.
 
         Returns:
             A pretty representation of the message.
@@ -372,31 +378,27 @@ class AIMessage(BaseMessage):
 
 
 class AIMessageChunk(AIMessage, BaseMessageChunk):
-    """Message chunk from an AI."""
+    """Message chunk from an AI (yielded when streaming)."""
 
     # Ignoring mypy re-assignment here since we're overriding the value
     # to make sure that the chunk variant can be discriminated from the
     # non-chunk variant.
     type: Literal["AIMessageChunk"] = "AIMessageChunk"  # type: ignore[assignment]
-    """The type of the message (used for deserialization).
-
-    Defaults to ``AIMessageChunk``.
-
-    """
+    """The type of the message (used for deserialization)."""
 
     tool_call_chunks: list[ToolCallChunk] = []
     """If provided, tool call chunks associated with the message."""
 
     chunk_position: Literal["last"] | None = None
-    """Optional span represented by an aggregated AIMessageChunk.
+    """Optional span represented by an aggregated `AIMessageChunk`.
 
-    If a chunk with ``chunk_position="last"`` is aggregated into a stream,
-    ``tool_call_chunks`` in message content will be parsed into ``tool_calls``.
+    If a chunk with `chunk_position="last"` is aggregated into a stream,
+    `tool_call_chunks` in message content will be parsed into `tool_calls`.
     """
 
     @property
     def lc_attributes(self) -> dict:
-        """Attrs to be serialized even if they are derived from other init args."""
+        """Attributes to be serialized, even if they are derived from other initialization args."""  # noqa: E501
         return {
             "tool_calls": self.tool_calls,
             "invalid_tool_calls": self.invalid_tool_calls,
@@ -404,7 +406,7 @@ class AIMessageChunk(AIMessage, BaseMessageChunk):
 
     @property
     def content_blocks(self) -> list[types.ContentBlock]:
-        """Return content blocks of the message."""
+        """Return standard, typed `ContentBlock` dicts from the message."""
         if self.response_metadata.get("output_version") == "v1":
             return cast("list[types.ContentBlock]", self.content)
 
@@ -545,12 +547,15 @@ class AIMessageChunk(AIMessage, BaseMessageChunk):
                     and call_id in id_to_tc
                 ):
                     self.content[idx] = cast("dict[str, Any]", id_to_tc[call_id])
+                    if "extras" in block:
+                        # mypy does not account for instance check for dict above
+                        self.content[idx]["extras"] = block["extras"]  # type: ignore[index]
 
         return self
 
     @model_validator(mode="after")
     def init_server_tool_calls(self) -> Self:
-        """Parse server_tool_call_chunks."""
+        """Parse `server_tool_call_chunks`."""
         if (
             self.chunk_position == "last"
             and self.response_metadata.get("output_version") == "v1"
@@ -596,14 +601,14 @@ class AIMessageChunk(AIMessage, BaseMessageChunk):
 def add_ai_message_chunks(
     left: AIMessageChunk, *others: AIMessageChunk
 ) -> AIMessageChunk:
-    """Add multiple ``AIMessageChunk``s together.
+    """Add multiple `AIMessageChunk`s together.
 
     Args:
-        left: The first ``AIMessageChunk``.
-        *others: Other ``AIMessageChunk``s to add.
+        left: The first `AIMessageChunk`.
+        *others: Other `AIMessageChunk`s to add.
 
     Returns:
-        The resulting ``AIMessageChunk``.
+        The resulting `AIMessageChunk`.
 
     """
     content = merge_content(left.content, *(o.content for o in others))
@@ -650,13 +655,13 @@ def add_ai_message_chunks(
             chunk_id = id_
             break
     else:
-        # second pass: prefer lc_run-* ids over lc_* ids
+        # second pass: prefer lc_run-* IDs over lc_* IDs
         for id_ in candidates:
             if id_ and id_.startswith(LC_ID_PREFIX):
                 chunk_id = id_
                 break
         else:
-            # third pass: take any remaining id (auto-generated lc_* ids)
+            # third pass: take any remaining ID (auto-generated lc_* IDs)
             for id_ in candidates:
                 if id_:
                     chunk_id = id_
@@ -681,43 +686,42 @@ def add_usage(left: UsageMetadata | None, right: UsageMetadata | None) -> UsageM
     """Recursively add two UsageMetadata objects.
 
     Example:
-        .. code-block:: python
+        ```python
+        from langchain_core.messages.ai import add_usage
 
-            from langchain_core.messages.ai import add_usage
+        left = UsageMetadata(
+            input_tokens=5,
+            output_tokens=0,
+            total_tokens=5,
+            input_token_details=InputTokenDetails(cache_read=3),
+        )
+        right = UsageMetadata(
+            input_tokens=0,
+            output_tokens=10,
+            total_tokens=10,
+            output_token_details=OutputTokenDetails(reasoning=4),
+        )
 
-            left = UsageMetadata(
-                input_tokens=5,
-                output_tokens=0,
-                total_tokens=5,
-                input_token_details=InputTokenDetails(cache_read=3),
-            )
-            right = UsageMetadata(
-                input_tokens=0,
-                output_tokens=10,
-                total_tokens=10,
-                output_token_details=OutputTokenDetails(reasoning=4),
-            )
-
-            add_usage(left, right)
+        add_usage(left, right)
+        ```
 
         results in
 
-        .. code-block:: python
-
-            UsageMetadata(
-                input_tokens=5,
-                output_tokens=10,
-                total_tokens=15,
-                input_token_details=InputTokenDetails(cache_read=3),
-                output_token_details=OutputTokenDetails(reasoning=4),
-            )
-
+        ```python
+        UsageMetadata(
+            input_tokens=5,
+            output_tokens=10,
+            total_tokens=15,
+            input_token_details=InputTokenDetails(cache_read=3),
+            output_token_details=OutputTokenDetails(reasoning=4),
+        )
+        ```
     Args:
-        left: The first ``UsageMetadata`` object.
-        right: The second ``UsageMetadata`` object.
+        left: The first `UsageMetadata` object.
+        right: The second `UsageMetadata` object.
 
     Returns:
-        The sum of the two ``UsageMetadata`` objects.
+        The sum of the two `UsageMetadata` objects.
 
     """
     if not (left or right):
@@ -740,48 +744,47 @@ def add_usage(left: UsageMetadata | None, right: UsageMetadata | None) -> UsageM
 def subtract_usage(
     left: UsageMetadata | None, right: UsageMetadata | None
 ) -> UsageMetadata:
-    """Recursively subtract two ``UsageMetadata`` objects.
+    """Recursively subtract two `UsageMetadata` objects.
 
-    Token counts cannot be negative so the actual operation is ``max(left - right, 0)``.
+    Token counts cannot be negative so the actual operation is `max(left - right, 0)`.
 
     Example:
-        .. code-block:: python
+        ```python
+        from langchain_core.messages.ai import subtract_usage
 
-            from langchain_core.messages.ai import subtract_usage
+        left = UsageMetadata(
+            input_tokens=5,
+            output_tokens=10,
+            total_tokens=15,
+            input_token_details=InputTokenDetails(cache_read=4),
+        )
+        right = UsageMetadata(
+            input_tokens=3,
+            output_tokens=8,
+            total_tokens=11,
+            output_token_details=OutputTokenDetails(reasoning=4),
+        )
 
-            left = UsageMetadata(
-                input_tokens=5,
-                output_tokens=10,
-                total_tokens=15,
-                input_token_details=InputTokenDetails(cache_read=4),
-            )
-            right = UsageMetadata(
-                input_tokens=3,
-                output_tokens=8,
-                total_tokens=11,
-                output_token_details=OutputTokenDetails(reasoning=4),
-            )
-
-            subtract_usage(left, right)
+        subtract_usage(left, right)
+        ```
 
         results in
 
-        .. code-block:: python
-
-            UsageMetadata(
-                input_tokens=2,
-                output_tokens=2,
-                total_tokens=4,
-                input_token_details=InputTokenDetails(cache_read=4),
-                output_token_details=OutputTokenDetails(reasoning=0),
-            )
-
+        ```python
+        UsageMetadata(
+            input_tokens=2,
+            output_tokens=2,
+            total_tokens=4,
+            input_token_details=InputTokenDetails(cache_read=4),
+            output_token_details=OutputTokenDetails(reasoning=0),
+        )
+        ```
     Args:
-        left: The first ``UsageMetadata`` object.
-        right: The second ``UsageMetadata`` object.
+        left: The first `UsageMetadata` object.
+        right: The second `UsageMetadata` object.
 
     Returns:
-        The resulting ``UsageMetadata`` after subtraction.
+        The resulting `UsageMetadata` after subtraction.
 
     """
     if not (left or right):

libs/core/langchain_core/messages/base.py

@@ -48,13 +48,13 @@ class TextAccessor(str):
 
     Exists to maintain backward compatibility while transitioning from method-based to
     property-based text access in message objects. In LangChain <v1.0, message text was
-    accessed via ``.text()`` method calls. In v1.0=<, the preferred pattern is property
-    access via ``.text``.
+    accessed via `.text()` method calls. In v1.0=<, the preferred pattern is property
+    access via `.text`.
 
-    Rather than breaking existing code immediately, ``TextAccessor`` allows both
+    Rather than breaking existing code immediately, `TextAccessor` allows both
     patterns:
-    - Modern property access: ``message.text`` (returns string directly)
-    - Legacy method access: ``message.text()`` (callable, emits deprecation warning)
+    - Modern property access: `message.text` (returns string directly)
+    - Legacy method access: `message.text()` (callable, emits deprecation warning)
 
     """
 
@@ -67,12 +67,12 @@ class TextAccessor(str):
     def __call__(self) -> str:
         """Enable method-style text access for backward compatibility.
 
-        This method exists solely to support legacy code that calls ``.text()``
-        as a method. New code should use property access (``.text``) instead.
+        This method exists solely to support legacy code that calls `.text()`
+        as a method. New code should use property access (`.text`) instead.
 
         !!! deprecated
-            As of `langchain-core` 1.0.0, calling ``.text()`` as a method is deprecated.
-            Use ``.text`` as a property instead. This method will be removed in 2.0.0.
+            As of `langchain-core` 1.0.0, calling `.text()` as a method is deprecated.
+            Use `.text` as a property instead. This method will be removed in 2.0.0.
 
         Returns:
             The string content, identical to property access.
@@ -92,11 +92,15 @@ class TextAccessor(str):
 class BaseMessage(Serializable):
     """Base abstract message class.
 
-    Messages are the inputs and outputs of a ``ChatModel``.
+    Messages are the inputs and outputs of a chat model.
+
+    Examples include [`HumanMessage`][langchain.messages.HumanMessage],
+    [`AIMessage`][langchain.messages.AIMessage], and
+    [`SystemMessage`][langchain.messages.SystemMessage].
     """
 
     content: str | list[str | dict]
-    """The string contents of the message."""
+    """The contents of the message."""
 
     additional_kwargs: dict = Field(default_factory=dict)
     """Reserved for additional payload data associated with the message.
@@ -159,14 +163,14 @@ class BaseMessage(Serializable):
         content_blocks: list[types.ContentBlock] | None = None,
         **kwargs: Any,
     ) -> None:
-        """Initialize ``BaseMessage``.
+        """Initialize a `BaseMessage`.
 
-        Specify ``content`` as positional arg or ``content_blocks`` for typing.
+        Specify `content` as positional arg or `content_blocks` for typing.
 
         Args:
-            content: The string contents of the message.
+            content: The contents of the message.
             content_blocks: Typed standard content.
-            kwargs: Additional arguments to pass to the parent class.
+            **kwargs: Additional arguments to pass to the parent class.
         """
         if content_blocks is not None:
             super().__init__(content=content_blocks, **kwargs)
@@ -175,7 +179,7 @@ class BaseMessage(Serializable):
 
     @classmethod
     def is_lc_serializable(cls) -> bool:
-        """``BaseMessage`` is serializable.
+        """`BaseMessage` is serializable.
 
         Returns:
             True
@@ -184,10 +188,10 @@ class BaseMessage(Serializable):
 
     @classmethod
     def get_lc_namespace(cls) -> list[str]:
-        """Get the namespace of the langchain object.
+        """Get the namespace of the LangChain object.
 
         Returns:
-            ``["langchain", "schema", "messages"]``
+            `["langchain", "schema", "messages"]`
         """
         return ["langchain", "schema", "messages"]
 
@@ -195,7 +199,7 @@ class BaseMessage(Serializable):
     def content_blocks(self) -> list[types.ContentBlock]:
         r"""Load content blocks from the message content.
 
-        !!! version-added "Added in version 1.0.0"
+        !!! version-added "Added in `langchain-core` 1.0.0"
 
         """
         # Needed here to avoid circular import, as these classes import BaseMessages
@@ -259,11 +263,11 @@ class BaseMessage(Serializable):
     def text(self) -> TextAccessor:
         """Get the text content of the message as a string.
 
-        Can be used as both property (``message.text``) and method (``message.text()``).
+        Can be used as both property (`message.text`) and method (`message.text()`).
 
         !!! deprecated
-            As of langchain-core 1.0.0, calling ``.text()`` as a method is deprecated.
-            Use ``.text`` as a property instead. This method will be removed in 2.0.0.
+            As of `langchain-core` 1.0.0, calling `.text()` as a method is deprecated.
+            Use `.text` as a property instead. This method will be removed in 2.0.0.
 
         Returns:
             The text content of the message.
@@ -306,8 +310,8 @@ class BaseMessage(Serializable):
         """Get a pretty representation of the message.
 
         Args:
-            html: Whether to format the message as HTML. If True, the message will be
-                formatted with HTML tags. Default is False.
+            html: Whether to format the message as HTML. If `True`, the message will be
+                formatted with HTML tags.
 
         Returns:
             A pretty representation of the message.
@@ -331,8 +335,8 @@ def merge_content(
     """Merge multiple message contents.
 
     Args:
-        first_content: The first ``content``. Can be a string or a list.
-        contents: The other ``content``s. Can be a string or a list.
+        first_content: The first `content`. Can be a string or a list.
+        contents: The other `content`s. Can be a string or a list.
 
     Returns:
         The merged content.
@@ -388,9 +392,9 @@ class BaseMessageChunk(BaseMessage):
 
         For example,
 
-        ``AIMessageChunk(content="Hello") + AIMessageChunk(content=" World")``
+        `AIMessageChunk(content="Hello") + AIMessageChunk(content=" World")`
 
-        will give ``AIMessageChunk(content="Hello World")``
+        will give `AIMessageChunk(content="Hello World")`
 
         """
         if isinstance(other, BaseMessageChunk):
@@ -439,8 +443,8 @@ def message_to_dict(message: BaseMessage) -> dict:
         message: Message to convert.
 
     Returns:
-        Message as a dict. The dict will have a ``type`` key with the message type
-        and a ``data`` key with the message data as a dict.
+        Message as a dict. The dict will have a `type` key with the message type
+        and a `data` key with the message data as a dict.
 
     """
     return {"type": message.type, "data": message.model_dump()}
@@ -450,7 +454,7 @@ def messages_to_dict(messages: Sequence[BaseMessage]) -> list[dict]:
     """Convert a sequence of Messages to a list of dictionaries.
 
     Args:
-        messages: Sequence of messages (as ``BaseMessage``s) to convert.
+        messages: Sequence of messages (as `BaseMessage`s) to convert.
 
     Returns:
         List of messages as dicts.
@@ -464,7 +468,7 @@ def get_msg_title_repr(title: str, *, bold: bool = False) -> str:
 
     Args:
         title: The title.
-        bold: Whether to bold the title. Default is False.
+        bold: Whether to bold the title.
 
     Returns:
         The title representation.

libs/core/langchain_core/messages/block_translators/__init__.py

@@ -1,13 +1,13 @@
 """Derivations of standard content blocks from provider content.
 
-``AIMessage`` will first attempt to use a provider-specific translator if
-``model_provider`` is set in ``response_metadata`` on the message. Consequently, each
+`AIMessage` will first attempt to use a provider-specific translator if
+`model_provider` is set in `response_metadata` on the message. Consequently, each
 provider translator must handle all possible content response types from the provider,
 including text.
 
 If no provider is set, or if the provider does not have a registered translator,
-``AIMessage`` will fall back to best-effort parsing of the content into blocks using
-the implementation in ``BaseMessage``.
+`AIMessage` will fall back to best-effort parsing of the content into blocks using
+the implementation in `BaseMessage`.
 """
 
 from __future__ import annotations
@@ -23,15 +23,15 @@ if TYPE_CHECKING:
 PROVIDER_TRANSLATORS: dict[str, dict[str, Callable[..., list[types.ContentBlock]]]] = {}
 """Map model provider names to translator functions.
 
-The dictionary maps provider names (e.g. ``'openai'``, ``'anthropic'``) to another
+The dictionary maps provider names (e.g. `'openai'`, `'anthropic'`) to another
 dictionary with two keys:
-- ``'translate_content'``: Function to translate ``AIMessage`` content.
-- ``'translate_content_chunk'``: Function to translate ``AIMessageChunk`` content.
+- `'translate_content'`: Function to translate `AIMessage` content.
+- `'translate_content_chunk'`: Function to translate `AIMessageChunk` content.
 
-When calling `.content_blocks` on an ``AIMessage`` or ``AIMessageChunk``, if
-``model_provider`` is set in ``response_metadata``, the corresponding translator
+When calling `content_blocks` on an `AIMessage` or `AIMessageChunk`, if
+`model_provider` is set in `response_metadata`, the corresponding translator
 functions will be used to parse the content into blocks. Otherwise, best-effort parsing
-in ``BaseMessage`` will be used.
+in `BaseMessage` will be used.
 """
 
 
@@ -43,9 +43,9 @@ def register_translator(
     """Register content translators for a provider in `PROVIDER_TRANSLATORS`.
 
     Args:
-        provider: The model provider name (e.g. ``'openai'``, ``'anthropic'``).
-        translate_content: Function to translate ``AIMessage`` content.
-        translate_content_chunk: Function to translate ``AIMessageChunk`` content.
+        provider: The model provider name (e.g. `'openai'`, `'anthropic'`).
+        translate_content: Function to translate `AIMessage` content.
+        translate_content_chunk: Function to translate `AIMessageChunk` content.
     """
     PROVIDER_TRANSLATORS[provider] = {
         "translate_content": translate_content,
@@ -62,9 +62,9 @@ def get_translator(
         provider: The model provider name.
 
     Returns:
-        Dictionary with ``'translate_content'`` and ``'translate_content_chunk'``
+        Dictionary with `'translate_content'` and `'translate_content_chunk'`
         functions, or None if no translator is registered for the provider. In such
-        case, best-effort parsing in ``BaseMessage`` will be used.
+        case, best-effort parsing in `BaseMessage` will be used.
     """
     return PROVIDER_TRANSLATORS.get(provider)
 
@@ -72,10 +72,10 @@ def get_translator(
 def _register_translators() -> None:
     """Register all translators in langchain-core.
 
-    A unit test ensures all modules in ``block_translators`` are represented here.
+    A unit test ensures all modules in `block_translators` are represented here.
 
     For translators implemented outside langchain-core, they can be registered by
-    calling ``register_translator`` from within the integration package.
+    calling `register_translator` from within the integration package.
     """
     from langchain_core.messages.block_translators.anthropic import (  # noqa: PLC0415
         _register_anthropic_translator,

libs/core/langchain_core/messages/block_translators/anthropic.py

@@ -31,12 +31,12 @@ def _convert_to_v1_from_anthropic_input(
 ) -> list[types.ContentBlock]:
     """Convert Anthropic format blocks to v1 format.
 
-    During the `.content_blocks` parsing process, we wrap blocks not recognized as a v1
-    block as a ``'non_standard'`` block with the original block stored in the ``value``
+    During the `content_blocks` parsing process, we wrap blocks not recognized as a v1
+    block as a `'non_standard'` block with the original block stored in the `value`
     field. This function attempts to unpack those blocks and convert any blocks that
     might be Anthropic format to v1 ContentBlocks.
 
-    If conversion fails, the block is left as a ``'non_standard'`` block.
+    If conversion fails, the block is left as a `'non_standard'` block.
 
     Args:
         content: List of content blocks to process.

libs/core/langchain_core/messages/block_translators/bedrock_converse.py

@@ -35,12 +35,12 @@ def _convert_to_v1_from_converse_input(
 ) -> list[types.ContentBlock]:
     """Convert Bedrock Converse format blocks to v1 format.
 
-    During the `.content_blocks` parsing process, we wrap blocks not recognized as a v1
-    block as a ``'non_standard'`` block with the original block stored in the ``value``
+    During the `content_blocks` parsing process, we wrap blocks not recognized as a v1
+    block as a `'non_standard'` block with the original block stored in the `value`
     field. This function attempts to unpack those blocks and convert any blocks that
     might be Converse format to v1 ContentBlocks.
 
-    If conversion fails, the block is left as a ``'non_standard'`` block.
+    If conversion fails, the block is left as a `'non_standard'` block.
 
     Args:
         content: List of content blocks to process.

libs/core/langchain_core/messages/block_translators/google_genai.py

@@ -105,12 +105,12 @@ def _convert_to_v1_from_genai_input(
     Called when message isn't an `AIMessage` or `model_provider` isn't set on
     `response_metadata`.
 
-    During the `.content_blocks` parsing process, we wrap blocks not recognized as a v1
-    block as a ``'non_standard'`` block with the original block stored in the ``value``
+    During the `content_blocks` parsing process, we wrap blocks not recognized as a v1
+    block as a `'non_standard'` block with the original block stored in the `value`
     field. This function attempts to unpack those blocks and convert any blocks that
     might be GenAI format to v1 ContentBlocks.
 
-    If conversion fails, the block is left as a ``'non_standard'`` block.
+    If conversion fails, the block is left as a `'non_standard'` block.
 
     Args:
         content: List of content blocks to process.
@@ -282,7 +282,7 @@ def _convert_to_v1_from_genai(message: AIMessage) -> list[types.ContentBlock]:
     standard content blocks for returning.
 
     Args:
-        message: The AIMessage or AIMessageChunk to convert.
+        message: The `AIMessage` or `AIMessageChunk` to convert.
 
     Returns:
         List of standard content blocks derived from the message content.
@@ -368,7 +368,7 @@ def _convert_to_v1_from_genai(message: AIMessage) -> list[types.ContentBlock]:
                     else:
                         # Assume it's raw base64 without data URI
                         try:
-                            # Validate base64 and decode for mime type detection
+                            # Validate base64 and decode for MIME type detection
                             decoded_bytes = base64.b64decode(url, validate=True)
 
                             image_url_b64_block = {
@@ -379,7 +379,7 @@ def _convert_to_v1_from_genai(message: AIMessage) -> list[types.ContentBlock]:
                             try:
                                 import filetype  # type: ignore[import-not-found] # noqa: PLC0415
 
-                                # Guess mime type based on file bytes
+                                # Guess MIME type based on file bytes
                                 mime_type = None
                                 kind = filetype.guess(decoded_bytes)
                                 if kind:
@@ -453,10 +453,13 @@ def _convert_to_v1_from_genai(message: AIMessage) -> list[types.ContentBlock]:
                     "status": status,  # type: ignore[typeddict-item]
                     "output": item.get("code_execution_result", ""),
                 }
+                server_tool_result_block["extras"] = {"block_type": item_type}
                 # Preserve original outcome in extras
                 if outcome is not None:
-                    server_tool_result_block["extras"] = {"outcome": outcome}
+                    server_tool_result_block["extras"]["outcome"] = outcome
                 converted_blocks.append(server_tool_result_block)
+            elif item_type == "text":
+                converted_blocks.append(cast("types.TextContentBlock", item))
             else:
                 # Unknown type, preserve as non-standard
                 converted_blocks.append({"type": "non_standard", "value": item})

libs/core/langchain_core/messages/block_translators/google_vertexai.py

@@ -1,37 +1,9 @@
 """Derivations of standard content blocks from Google (VertexAI) content."""
 
-import warnings
-
-from langchain_core.messages import AIMessage, AIMessageChunk
-from langchain_core.messages import content as types
-
-WARNED = False
-
-
-def translate_content(message: AIMessage) -> list[types.ContentBlock]:  # noqa: ARG001
-    """Derive standard content blocks from a message with Google (VertexAI) content."""
-    global WARNED  # noqa: PLW0603
-    if not WARNED:
-        warning_message = (
-            "Content block standardization is not yet fully supported for Google "
-            "VertexAI."
-        )
-        warnings.warn(warning_message, stacklevel=2)
-        WARNED = True
-    raise NotImplementedError
-
-
-def translate_content_chunk(message: AIMessageChunk) -> list[types.ContentBlock]:  # noqa: ARG001
-    """Derive standard content blocks from a chunk with Google (VertexAI) content."""
-    global WARNED  # noqa: PLW0603
-    if not WARNED:
-        warning_message = (
-            "Content block standardization is not yet fully supported for Google "
-            "VertexAI."
-        )
-        warnings.warn(warning_message, stacklevel=2)
-        WARNED = True
-    raise NotImplementedError
+from langchain_core.messages.block_translators.google_genai import (
+    translate_content,
+    translate_content_chunk,
+)
 
 
 def _register_google_vertexai_translator() -> None:

libs/core/langchain_core/messages/block_translators/groq.py

@@ -1,39 +1,135 @@
 """Derivations of standard content blocks from Groq content."""
 
-import warnings
+import json
+import re
+from typing import Any
 
 from langchain_core.messages import AIMessage, AIMessageChunk
 from langchain_core.messages import content as types
-
-WARNED = False
+from langchain_core.messages.base import _extract_reasoning_from_additional_kwargs
 
 
-def translate_content(message: AIMessage) -> list[types.ContentBlock]:  # noqa: ARG001
-    """Derive standard content blocks from a message with Groq content."""
-    global WARNED  # noqa: PLW0603
-    if not WARNED:
-        warning_message = (
-            "Content block standardization is not yet fully supported for Groq."
+def _populate_extras(
+    standard_block: types.ContentBlock, block: dict[str, Any], known_fields: set[str]
+) -> types.ContentBlock:
+    """Mutate a block, populating extras."""
+    if standard_block.get("type") == "non_standard":
+        return standard_block
+
+    for key, value in block.items():
+        if key not in known_fields:
+            if "extras" not in standard_block:
+                # Below type-ignores are because mypy thinks a non-standard block can
+                # get here, although we exclude them above.
+                standard_block["extras"] = {}  # type: ignore[typeddict-unknown-key]
+            standard_block["extras"][key] = value  # type: ignore[typeddict-item]
+
+    return standard_block
+
+
+def _parse_code_json(s: str) -> dict:
+    """Extract Python code from Groq built-in tool content.
+
+    Extracts the value of the 'code' field from a string of the form:
+    {"code": some_arbitrary_text_with_unescaped_quotes}
+
+    As Groq may not escape quotes in the executed tools, e.g.:
+    ```
+    '{"code": "import math; print("The square root of 101 is: "); print(math.sqrt(101))"}'
+    ```
+    """  # noqa: E501
+    m = re.fullmatch(r'\s*\{\s*"code"\s*:\s*"(.*)"\s*\}\s*', s, flags=re.DOTALL)
+    if not m:
+        msg = (
+            "Could not extract Python code from Groq tool arguments. "
+            "Expected a JSON object with a 'code' field."
         )
-        warnings.warn(warning_message, stacklevel=2)
-        WARNED = True
-    raise NotImplementedError
+        raise ValueError(msg)
+    return {"code": m.group(1)}
 
 
-def translate_content_chunk(message: AIMessageChunk) -> list[types.ContentBlock]:  # noqa: ARG001
-    """Derive standard content blocks from a message chunk with Groq content."""
-    global WARNED  # noqa: PLW0603
-    if not WARNED:
-        warning_message = (
-            "Content block standardization is not yet fully supported for Groq."
+def _convert_to_v1_from_groq(message: AIMessage) -> list[types.ContentBlock]:
+    """Convert groq message content to v1 format."""
+    content_blocks: list[types.ContentBlock] = []
+
+    if reasoning_block := _extract_reasoning_from_additional_kwargs(message):
+        content_blocks.append(reasoning_block)
+
+    if executed_tools := message.additional_kwargs.get("executed_tools"):
+        for idx, executed_tool in enumerate(executed_tools):
+            args: dict[str, Any] | None = None
+            if arguments := executed_tool.get("arguments"):
+                try:
+                    args = json.loads(arguments)
+                except json.JSONDecodeError:
+                    if executed_tool.get("type") == "python":
+                        try:
+                            args = _parse_code_json(arguments)
+                        except ValueError:
+                            continue
+                    elif (
+                        executed_tool.get("type") == "function"
+                        and executed_tool.get("name") == "python"
+                    ):
+                        # GPT-OSS
+                        args = {"code": arguments}
+                    else:
+                        continue
+            if isinstance(args, dict):
+                name = ""
+                if executed_tool.get("type") == "search":
+                    name = "web_search"
+                elif executed_tool.get("type") == "python" or (
+                    executed_tool.get("type") == "function"
+                    and executed_tool.get("name") == "python"
+                ):
+                    name = "code_interpreter"
+                server_tool_call: types.ServerToolCall = {
+                    "type": "server_tool_call",
+                    "name": name,
+                    "id": str(idx),
+                    "args": args,
+                }
+                content_blocks.append(server_tool_call)
+            if tool_output := executed_tool.get("output"):
+                tool_result: types.ServerToolResult = {
+                    "type": "server_tool_result",
+                    "tool_call_id": str(idx),
+                    "output": tool_output,
+                    "status": "success",
+                }
+                known_fields = {"type", "arguments", "index", "output"}
+                _populate_extras(tool_result, executed_tool, known_fields)
+                content_blocks.append(tool_result)
+
+    if isinstance(message.content, str) and message.content:
+        content_blocks.append({"type": "text", "text": message.content})
+
+    for tool_call in message.tool_calls:
+        content_blocks.append(  # noqa: PERF401
+            {
+                "type": "tool_call",
+                "name": tool_call["name"],
+                "args": tool_call["args"],
+                "id": tool_call.get("id"),
+            }
         )
-        warnings.warn(warning_message, stacklevel=2)
-        WARNED = True
-    raise NotImplementedError
+
+    return content_blocks
+
+
+def translate_content(message: AIMessage) -> list[types.ContentBlock]:
+    """Derive standard content blocks from a message with groq content."""
+    return _convert_to_v1_from_groq(message)
+
+
+def translate_content_chunk(message: AIMessageChunk) -> list[types.ContentBlock]:
+    """Derive standard content blocks from a message chunk with groq content."""
+    return _convert_to_v1_from_groq(message)
 
 
 def _register_groq_translator() -> None:
-    """Register the Groq translator with the central registry.
+    """Register the groq translator with the central registry.
 
     Run automatically when the module is imported.
     """

libs/core/langchain_core/messages/block_translators/langchain_v0.py

@@ -10,12 +10,12 @@ def _convert_v0_multimodal_input_to_v1(
 ) -> list[types.ContentBlock]:
     """Convert v0 multimodal blocks to v1 format.
 
-    During the `.content_blocks` parsing process, we wrap blocks not recognized as a v1
-    block as a ``'non_standard'`` block with the original block stored in the ``value``
+    During the `content_blocks` parsing process, we wrap blocks not recognized as a v1
+    block as a `'non_standard'` block with the original block stored in the `value`
     field. This function attempts to unpack those blocks and convert any v0 format
     blocks to v1 format.
 
-    If conversion fails, the block is left as a ``'non_standard'`` block.
+    If conversion fails, the block is left as a `'non_standard'` block.
 
     Args:
         content: List of content blocks to process.

libs/core/langchain_core/messages/block_translators/openai.py

@@ -18,7 +18,7 @@ if TYPE_CHECKING:
 
 
 def convert_to_openai_image_block(block: dict[str, Any]) -> dict:
-    """Convert ``ImageContentBlock`` to format expected by OpenAI Chat Completions."""
+    """Convert `ImageContentBlock` to format expected by OpenAI Chat Completions."""
     if "url" in block:
         return {
             "type": "image_url",
@@ -155,12 +155,12 @@ def _convert_to_v1_from_chat_completions_input(
 ) -> list[types.ContentBlock]:
     """Convert OpenAI Chat Completions format blocks to v1 format.
 
-    During the `.content_blocks` parsing process, we wrap blocks not recognized as a v1
-    block as a ``'non_standard'`` block with the original block stored in the ``value``
+    During the `content_blocks` parsing process, we wrap blocks not recognized as a v1
+    block as a `'non_standard'` block with the original block stored in the `value`
     field. This function attempts to unpack those blocks and convert any blocks that
     might be OpenAI format to v1 ContentBlocks.
 
-    If conversion fails, the block is left as a ``'non_standard'`` block.
+    If conversion fails, the block is left as a `'non_standard'` block.
 
     Args:
         content: List of content blocks to process.
@@ -263,7 +263,7 @@ _FUNCTION_CALL_IDS_MAP_KEY = "__openai_function_call_ids__"
 
 
 def _convert_from_v03_ai_message(message: AIMessage) -> AIMessage:
-    """Convert v0 AIMessage into ``output_version="responses/v1"`` format."""
+    """Convert v0 AIMessage into `output_version="responses/v1"` format."""
     from langchain_core.messages import AIMessageChunk  # noqa: PLC0415
 
     # Only update ChatOpenAI v0.3 AIMessages

libs/core/langchain_core/messages/chat.py

@@ -19,7 +19,7 @@ class ChatMessage(BaseMessage):
     """The speaker / role of the Message."""
 
     type: Literal["chat"] = "chat"
-    """The type of the message (used during serialization). Defaults to "chat"."""
+    """The type of the message (used during serialization)."""
 
 
 class ChatMessageChunk(ChatMessage, BaseMessageChunk):
@@ -29,11 +29,7 @@ class ChatMessageChunk(ChatMessage, BaseMessageChunk):
     # to make sure that the chunk variant can be discriminated from the
     # non-chunk variant.
     type: Literal["ChatMessageChunk"] = "ChatMessageChunk"  # type: ignore[assignment]
-    """The type of the message (used during serialization).
-
-    Defaults to ``'ChatMessageChunk'``.
-
-    """
+    """The type of the message (used during serialization)."""
 
     @override
     def __add__(self, other: Any) -> BaseMessageChunk:  # type: ignore[override]

libs/core/langchain_core/messages/content.py

@@ -5,7 +5,7 @@
     change in future releases.
 
 This module provides standardized data structures for representing inputs to and
-outputs from LLMs. The core abstraction is the **Content Block**, a ``TypedDict``.
+outputs from LLMs. The core abstraction is the **Content Block**, a `TypedDict`.
 
 **Rationale**
 
@@ -20,59 +20,59 @@ blocks into the format required by its API.
 **Extensibility**
 
 Data **not yet mapped** to a standard block may be represented using the
-``NonStandardContentBlock``, which allows for provider-specific data to be included
+`NonStandardContentBlock`, which allows for provider-specific data to be included
 without losing the benefits of type checking and validation.
 
 Furthermore, provider-specific fields **within** a standard block are fully supported
-by default in the ``extras`` field of each block. This allows for additional metadata
+by default in the `extras` field of each block. This allows for additional metadata
 to be included without breaking the standard structure.
 
 !!! warning
-    Do not heavily rely on the ``extras`` field for provider-specific data! This field
+    Do not heavily rely on the `extras` field for provider-specific data! This field
     is subject to deprecation in future releases as we move towards PEP 728.
 
 !!! note
-    Following widespread adoption of `PEP 728 <https://peps.python.org/pep-0728/>`__, we
-    will add ``extra_items=Any`` as a param to Content Blocks. This will signify to type
+    Following widespread adoption of [PEP 728](https://peps.python.org/pep-0728/), we
+    will add `extra_items=Any` as a param to Content Blocks. This will signify to type
     checkers that additional provider-specific fields are allowed outside of the
-    ``extras`` field, and that will become the new standard approach to adding
+    `extras` field, and that will become the new standard approach to adding
     provider-specific metadata.
 
     ??? note
 
         **Example with PEP 728 provider-specific fields:**
 
-        .. code-block:: python
+        ```python
+        # Content block definition
+        # NOTE: `extra_items=Any`
+        class TextContentBlock(TypedDict, extra_items=Any):
+            type: Literal["text"]
+            id: NotRequired[str]
+            text: str
+            annotations: NotRequired[list[Annotation]]
+            index: NotRequired[int]
+        ```
 
-            # Content block definition
-            # NOTE: `extra_items=Any`
-            class TextContentBlock(TypedDict, extra_items=Any):
-                type: Literal["text"]
-                id: NotRequired[str]
-                text: str
-                annotations: NotRequired[list[Annotation]]
-                index: NotRequired[int]
+        ```python
+        from langchain_core.messages.content import TextContentBlock
 
-        .. code-block:: python
+        # Create a text content block with provider-specific fields
+        my_block: TextContentBlock = {
+            # Add required fields
+            "type": "text",
+            "text": "Hello, world!",
+            # Additional fields not specified in the TypedDict
+            # These are valid with PEP 728 and are typed as Any
+            "openai_metadata": {"model": "gpt-4", "temperature": 0.7},
+            "anthropic_usage": {"input_tokens": 10, "output_tokens": 20},
+            "custom_field": "any value",
+        }
 
-            from langchain_core.messages.content import TextContentBlock
+        # Mutating an existing block to add provider-specific fields
+        openai_data = my_block["openai_metadata"]  # Type: Any
+        ```
 
-            # Create a text content block with provider-specific fields
-            my_block: TextContentBlock = {
-                # Add required fields
-                "type": "text",
-                "text": "Hello, world!",
-                # Additional fields not specified in the TypedDict
-                # These are valid with PEP 728 and are typed as Any
-                "openai_metadata": {"model": "gpt-4", "temperature": 0.7},
-                "anthropic_usage": {"input_tokens": 10, "output_tokens": 20},
-                "custom_field": "any value",
-            }
-
-            # Mutating an existing block to add provider-specific fields
-            openai_data = my_block["openai_metadata"]  # Type: Any
-
-        PEP 728 is enabled with ``# type: ignore[call-arg]`` comments to suppress
+        PEP 728 is enabled with `# type: ignore[call-arg]` comments to suppress
         warnings from type checkers that don't yet support it. The functionality works
         correctly in Python 3.13+ and will be fully supported as the ecosystem catches
         up.
@@ -81,52 +81,51 @@ to be included without breaking the standard structure.
 
 The module defines several types of content blocks, including:
 
-- ``TextContentBlock``: Standard text output.
-- ``Citation``: For annotations that link text output to a source document.
-- ``ToolCall``: For function calling.
-- ``ReasoningContentBlock``: To capture a model's thought process.
+- `TextContentBlock`: Standard text output.
+- `Citation`: For annotations that link text output to a source document.
+- `ToolCall`: For function calling.
+- `ReasoningContentBlock`: To capture a model's thought process.
 - Multimodal data:
-    - ``ImageContentBlock``
-    - ``AudioContentBlock``
-    - ``VideoContentBlock``
-    - ``PlainTextContentBlock`` (e.g. .txt or .md files)
-    - ``FileContentBlock`` (e.g. PDFs, etc.)
+    - `ImageContentBlock`
+    - `AudioContentBlock`
+    - `VideoContentBlock`
+    - `PlainTextContentBlock` (e.g. .txt or .md files)
+    - `FileContentBlock` (e.g. PDFs, etc.)
 
 **Example Usage**
 
-.. code-block:: python
+```python
+# Direct construction:
+from langchain_core.messages.content import TextContentBlock, ImageContentBlock
 
-    # Direct construction:
-    from langchain_core.messages.content import TextContentBlock, ImageContentBlock
+multimodal_message: AIMessage(
+    content_blocks=[
+        TextContentBlock(type="text", text="What is shown in this image?"),
+        ImageContentBlock(
+            type="image",
+            url="https://www.langchain.com/images/brand/langchain_logo_text_w_white.png",
+            mime_type="image/png",
+        ),
+    ]
+)
 
-    multimodal_message: AIMessage(
-        content_blocks=[
-            TextContentBlock(type="text", text="What is shown in this image?"),
-            ImageContentBlock(
-                type="image",
-                url="https://www.langchain.com/images/brand/langchain_logo_text_w_white.png",
-                mime_type="image/png",
-            ),
-        ]
-    )
+# Using factories:
+from langchain_core.messages.content import create_text_block, create_image_block
 
-    # Using factories:
-    from langchain_core.messages.content import create_text_block, create_image_block
-
-    multimodal_message: AIMessage(
-        content=[
-            create_text_block("What is shown in this image?"),
-            create_image_block(
-                url="https://www.langchain.com/images/brand/langchain_logo_text_w_white.png",
-                mime_type="image/png",
-            ),
-        ]
-    )
+multimodal_message: AIMessage(
+    content=[
+        create_text_block("What is shown in this image?"),
+        create_image_block(
+            url="https://www.langchain.com/images/brand/langchain_logo_text_w_white.png",
+            mime_type="image/png",
+        ),
+    ]
+)
+```
 
 Factory functions offer benefits such as:
 - Automatic ID generation (when not provided)
-- No need to manually specify the ``type`` field
-
+- No need to manually specify the `type` field
 """
 
 from typing import Any, Literal, get_args, get_type_hints
@@ -140,12 +139,12 @@ class Citation(TypedDict):
     """Annotation for citing data from a document.
 
     !!! note
-        ``start``/``end`` indices refer to the **response text**,
+        `start`/`end` indices refer to the **response text**,
         not the source text. This means that the indices are relative to the model's
-        response, not the original document (as specified in the ``url``).
+        response, not the original document (as specified in the `url`).
 
-    !!! note
-        ``create_citation`` may also be used as a factory to create a ``Citation``.
+    !!! note "Factory function"
+        `create_citation` may also be used as a factory to create a `Citation`.
         Benefits include:
 
         * Automatic ID generation (when not provided)
@@ -157,10 +156,12 @@ class Citation(TypedDict):
     """Type of the content block. Used for discrimination."""
 
     id: NotRequired[str]
-    """Content block identifier. Either:
+    """Content block identifier.
+
+    Either:
 
     - Generated by the provider (e.g., OpenAI's file ID)
-    - Generated by LangChain upon creation (``UUID4`` prefixed with ``'lc_'``))
+    - Generated by LangChain upon creation (`UUID4` prefixed with `'lc_'`))
 
     """
 
@@ -174,10 +175,10 @@ class Citation(TypedDict):
     """
 
     start_index: NotRequired[int]
-    """Start index of the **response text** (``TextContentBlock.text``)."""
+    """Start index of the **response text** (`TextContentBlock.text`)."""
 
     end_index: NotRequired[int]
-    """End index of the **response text** (``TextContentBlock.text``)"""
+    """End index of the **response text** (`TextContentBlock.text`)"""
 
     cited_text: NotRequired[str]
     """Excerpt of source text being cited."""
@@ -202,8 +203,9 @@ class NonStandardAnnotation(TypedDict):
     """Content block identifier.
 
     Either:
+
     - Generated by the provider (e.g., OpenAI's file ID)
-    - Generated by LangChain upon creation (``UUID4`` prefixed with ``'lc_'``))
+    - Generated by LangChain upon creation (`UUID4` prefixed with `'lc_'`))
 
     """
 
@@ -212,6 +214,7 @@ class NonStandardAnnotation(TypedDict):
 
 
 Annotation = Citation | NonStandardAnnotation
+"""A union of all defined `Annotation` types."""
 
 
 class TextContentBlock(TypedDict):
@@ -220,9 +223,9 @@ class TextContentBlock(TypedDict):
     This typically represents the main text content of a message, such as the response
     from a language model or the text of a user message.
 
-    !!! note
-        ``create_text_block`` may also be used as a factory to create a
-        ``TextContentBlock``. Benefits include:
+    !!! note "Factory function"
+        `create_text_block` may also be used as a factory to create a
+        `TextContentBlock`. Benefits include:
 
         * Automatic ID generation (when not provided)
         * Required arguments strictly validated at creation time
@@ -236,8 +239,9 @@ class TextContentBlock(TypedDict):
     """Content block identifier.
 
     Either:
+
     - Generated by the provider (e.g., OpenAI's file ID)
-    - Generated by LangChain upon creation (``UUID4`` prefixed with ``'lc_'``))
+    - Generated by LangChain upon creation (`UUID4` prefixed with `'lc_'`))
 
     """
 
@@ -245,7 +249,7 @@ class TextContentBlock(TypedDict):
     """Block text."""
 
     annotations: NotRequired[list[Annotation]]
-    """``Citation``s and other annotations."""
+    """`Citation`s and other annotations."""
 
     index: NotRequired[int | str]
     """Index of block in aggregate response. Used during streaming."""
@@ -255,20 +259,19 @@ class TextContentBlock(TypedDict):
 
 
 class ToolCall(TypedDict):
-    """Represents a request to call a tool.
+    """Represents an AI's request to call a tool.
 
     Example:
-
-        .. code-block:: python
-
-            {"name": "foo", "args": {"a": 1}, "id": "123"}
+        ```python
+        {"name": "foo", "args": {"a": 1}, "id": "123"}
+        ```
 
         This represents a request to call the tool named "foo" with arguments {"a": 1}
         and an identifier of "123".
 
-    !!! note
-        ``create_tool_call`` may also be used as a factory to create a
-        ``ToolCall``. Benefits include:
+    !!! note "Factory function"
+        `create_tool_call` may also be used as a factory to create a
+        `ToolCall`. Benefits include:
 
         * Automatic ID generation (when not provided)
         * Required arguments strictly validated at creation time
@@ -301,24 +304,22 @@ class ToolCall(TypedDict):
 
 
 class ToolCallChunk(TypedDict):
-    """A chunk of a tool call (e.g., as part of a stream).
+    """A chunk of a tool call (yielded when streaming).
 
-    When merging ``ToolCallChunks`` (e.g., via ``AIMessageChunk.__add__``),
+    When merging `ToolCallChunks` (e.g., via `AIMessageChunk.__add__`),
     all string attributes are concatenated. Chunks are only merged if their
-    values of ``index`` are equal and not ``None``.
+    values of `index` are equal and not `None`.
 
     Example:
+    ```python
+    left_chunks = [ToolCallChunk(name="foo", args='{"a":', index=0)]
+    right_chunks = [ToolCallChunk(name=None, args="1}", index=0)]
 
-    .. code-block:: python
-
-        left_chunks = [ToolCallChunk(name="foo", args='{"a":', index=0)]
-        right_chunks = [ToolCallChunk(name=None, args="1}", index=0)]
-
-        (
-            AIMessageChunk(content="", tool_call_chunks=left_chunks)
-            + AIMessageChunk(content="", tool_call_chunks=right_chunks)
-        ).tool_call_chunks == [ToolCallChunk(name="foo", args='{"a":1}', index=0)]
-
+    (
+        AIMessageChunk(content="", tool_call_chunks=left_chunks)
+        + AIMessageChunk(content="", tool_call_chunks=right_chunks)
+    ).tool_call_chunks == [ToolCallChunk(name="foo", args='{"a":1}', index=0)]
+    ```
     """
 
     # TODO: Consider making fields NotRequired[str] in the future.
@@ -350,7 +351,7 @@ class ToolCallChunk(TypedDict):
 class InvalidToolCall(TypedDict):
     """Allowance for errors made by LLM.
 
-    Here we add an ``error`` key to surface errors made during generation
+    Here we add an `error` key to surface errors made during generation
     (e.g., invalid JSON arguments.)
 
     """
@@ -385,7 +386,10 @@ class InvalidToolCall(TypedDict):
 
 
 class ServerToolCall(TypedDict):
-    """Tool call that is executed server-side."""
+    """Tool call that is executed server-side.
+
+    For example: code execution, web search, etc.
+    """
 
     type: Literal["server_tool_call"]
     """Used for discrimination."""
@@ -407,7 +411,7 @@ class ServerToolCall(TypedDict):
 
 
 class ServerToolCallChunk(TypedDict):
-    """A chunk of a tool call (as part of a stream)."""
+    """A chunk of a server-side tool call (yielded when streaming)."""
 
     type: Literal["server_tool_call_chunk"]
     """Used for discrimination."""
@@ -456,9 +460,9 @@ class ServerToolResult(TypedDict):
 class ReasoningContentBlock(TypedDict):
     """Reasoning output from a LLM.
 
-    !!! note
-        ``create_reasoning_block`` may also be used as a factory to create a
-        ``ReasoningContentBlock``. Benefits include:
+    !!! note "Factory function"
+        `create_reasoning_block` may also be used as a factory to create a
+        `ReasoningContentBlock`. Benefits include:
 
         * Automatic ID generation (when not provided)
         * Required arguments strictly validated at creation time
@@ -472,8 +476,9 @@ class ReasoningContentBlock(TypedDict):
     """Content block identifier.
 
     Either:
+
     - Generated by the provider (e.g., OpenAI's file ID)
-    - Generated by LangChain upon creation (``UUID4`` prefixed with ``'lc_'``))
+    - Generated by LangChain upon creation (`UUID4` prefixed with `'lc_'`))
 
     """
 
@@ -481,7 +486,7 @@ class ReasoningContentBlock(TypedDict):
     """Reasoning text.
 
     Either the thought summary or the raw reasoning text itself. This is often parsed
-    from ``<think>`` tags in the model's response.
+    from `<think>` tags in the model's response.
 
     """
 
@@ -498,9 +503,9 @@ class ReasoningContentBlock(TypedDict):
 class ImageContentBlock(TypedDict):
     """Image data.
 
-    !!! note
-        ``create_image_block`` may also be used as a factory to create a
-        ``ImageContentBlock``. Benefits include:
+    !!! note "Factory function"
+        `create_image_block` may also be used as a factory to create a
+        `ImageContentBlock`. Benefits include:
 
         * Automatic ID generation (when not provided)
         * Required arguments strictly validated at creation time
@@ -514,8 +519,9 @@ class ImageContentBlock(TypedDict):
     """Content block identifier.
 
     Either:
+
     - Generated by the provider (e.g., OpenAI's file ID)
-    - Generated by LangChain upon creation (``UUID4`` prefixed with ``'lc_'``))
+    - Generated by LangChain upon creation (`UUID4` prefixed with `'lc_'`))
 
     """
 
@@ -525,7 +531,7 @@ class ImageContentBlock(TypedDict):
     mime_type: NotRequired[str]
     """MIME type of the image. Required for base64.
 
-    `Examples from IANA <https://www.iana.org/assignments/media-types/media-types.xhtml#image>`__
+    [Examples from IANA](https://www.iana.org/assignments/media-types/media-types.xhtml#image)
 
     """
 
@@ -545,9 +551,9 @@ class ImageContentBlock(TypedDict):
 class VideoContentBlock(TypedDict):
     """Video data.
 
-    !!! note
-        ``create_video_block`` may also be used as a factory to create a
-        ``VideoContentBlock``. Benefits include:
+    !!! note "Factory function"
+        `create_video_block` may also be used as a factory to create a
+        `VideoContentBlock`. Benefits include:
 
         * Automatic ID generation (when not provided)
         * Required arguments strictly validated at creation time
@@ -561,8 +567,9 @@ class VideoContentBlock(TypedDict):
     """Content block identifier.
 
     Either:
+
     - Generated by the provider (e.g., OpenAI's file ID)
-    - Generated by LangChain upon creation (``UUID4`` prefixed with ``'lc_'``))
+    - Generated by LangChain upon creation (`UUID4` prefixed with `'lc_'`))
 
     """
 
@@ -572,7 +579,7 @@ class VideoContentBlock(TypedDict):
     mime_type: NotRequired[str]
     """MIME type of the video. Required for base64.
 
-    `Examples from IANA <https://www.iana.org/assignments/media-types/media-types.xhtml#video>`__
+    [Examples from IANA](https://www.iana.org/assignments/media-types/media-types.xhtml#video)
 
     """
 
@@ -592,9 +599,9 @@ class VideoContentBlock(TypedDict):
 class AudioContentBlock(TypedDict):
     """Audio data.
 
-    !!! note
-        ``create_audio_block`` may also be used as a factory to create an
-        ``AudioContentBlock``. Benefits include:
+    !!! note "Factory function"
+        `create_audio_block` may also be used as a factory to create an
+        `AudioContentBlock`. Benefits include:
         * Automatic ID generation (when not provided)
         * Required arguments strictly validated at creation time
 
@@ -607,8 +614,9 @@ class AudioContentBlock(TypedDict):
     """Content block identifier.
 
     Either:
+
     - Generated by the provider (e.g., OpenAI's file ID)
-    - Generated by LangChain upon creation (``UUID4`` prefixed with ``'lc_'``))
+    - Generated by LangChain upon creation (`UUID4` prefixed with `'lc_'`))
 
     """
 
@@ -618,7 +626,7 @@ class AudioContentBlock(TypedDict):
     mime_type: NotRequired[str]
     """MIME type of the audio. Required for base64.
 
-    `Examples from IANA <https://www.iana.org/assignments/media-types/media-types.xhtml#audio>`__
+    [Examples from IANA](https://www.iana.org/assignments/media-types/media-types.xhtml#audio)
 
     """
 
@@ -636,21 +644,21 @@ class AudioContentBlock(TypedDict):
 
 
 class PlainTextContentBlock(TypedDict):
-    """Plaintext data (e.g., from a document).
+    """Plaintext data (e.g., from a `.txt` or `.md` document).
 
     !!! note
-        A ``PlainTextContentBlock`` existed in ``langchain-core<1.0.0``. Although the
+        A `PlainTextContentBlock` existed in `langchain-core<1.0.0`. Although the
         name has carried over, the structure has changed significantly. The only shared
-        keys between the old and new versions are ``type`` and ``text``, though the
-        ``type`` value has changed from ``'text'`` to ``'text-plain'``.
+        keys between the old and new versions are `type` and `text`, though the
+        `type` value has changed from `'text'` to `'text-plain'`.
 
     !!! note
         Title and context are optional fields that may be passed to the model. See
-        Anthropic `example <https://docs.anthropic.com/en/docs/build-with-claude/citations#citable-vs-non-citable-content>`__.
+        Anthropic [example](https://docs.claude.com/en/docs/build-with-claude/citations#citable-vs-non-citable-content).
 
-    !!! note
-        ``create_plaintext_block`` may also be used as a factory to create a
-        ``PlainTextContentBlock``. Benefits include:
+    !!! note "Factory function"
+        `create_plaintext_block` may also be used as a factory to create a
+        `PlainTextContentBlock`. Benefits include:
 
         * Automatic ID generation (when not provided)
         * Required arguments strictly validated at creation time
@@ -664,8 +672,9 @@ class PlainTextContentBlock(TypedDict):
     """Content block identifier.
 
     Either:
+
     - Generated by the provider (e.g., OpenAI's file ID)
-    - Generated by LangChain upon creation (``UUID4`` prefixed with ``'lc_'``))
+    - Generated by LangChain upon creation (`UUID4` prefixed with `'lc_'`))
 
     """
 
@@ -698,18 +707,18 @@ class PlainTextContentBlock(TypedDict):
 
 
 class FileContentBlock(TypedDict):
-    """File data that doesn't fit into other multimodal blocks.
+    """File data that doesn't fit into other multimodal block types.
 
     This block is intended for files that are not images, audio, or plaintext. For
     example, it can be used for PDFs, Word documents, etc.
 
     If the file is an image, audio, or plaintext, you should use the corresponding
-    content block type (e.g., ``ImageContentBlock``, ``AudioContentBlock``,
-    ``PlainTextContentBlock``).
+    content block type (e.g., `ImageContentBlock`, `AudioContentBlock`,
+    `PlainTextContentBlock`).
 
-    !!! note
-        ``create_file_block`` may also be used as a factory to create a
-        ``FileContentBlock``. Benefits include:
+    !!! note "Factory function"
+        `create_file_block` may also be used as a factory to create a
+        `FileContentBlock`. Benefits include:
 
         * Automatic ID generation (when not provided)
         * Required arguments strictly validated at creation time
@@ -723,8 +732,9 @@ class FileContentBlock(TypedDict):
     """Content block identifier.
 
     Either:
+
     - Generated by the provider (e.g., OpenAI's file ID)
-    - Generated by LangChain upon creation (``UUID4`` prefixed with ``'lc_'``))
+    - Generated by LangChain upon creation (`UUID4` prefixed with `'lc_'`))
 
     """
 
@@ -734,7 +744,7 @@ class FileContentBlock(TypedDict):
     mime_type: NotRequired[str]
     """MIME type of the file. Required for base64.
 
-    `Examples from IANA <https://www.iana.org/assignments/media-types/media-types.xhtml>`__
+    [Examples from IANA](https://www.iana.org/assignments/media-types/media-types.xhtml)
 
     """
 
@@ -757,21 +767,21 @@ class FileContentBlock(TypedDict):
 
 
 class NonStandardContentBlock(TypedDict):
-    """Provider-specific data.
+    """Provider-specific content data.
 
     This block contains data for which there is not yet a standard type.
 
     The purpose of this block should be to simply hold a provider-specific payload.
     If a provider's non-standard output includes reasoning and tool calls, it should be
     the adapter's job to parse that payload and emit the corresponding standard
-    ``ReasoningContentBlock`` and ``ToolCalls``.
+    `ReasoningContentBlock` and `ToolCalls`.
 
-    Has no ``extras`` field, as provider-specific data should be included in the
-    ``value`` field.
+    Has no `extras` field, as provider-specific data should be included in the
+    `value` field.
 
-    !!! note
-        ``create_non_standard_block`` may also be used as a factory to create a
-        ``NonStandardContentBlock``. Benefits include:
+    !!! note "Factory function"
+        `create_non_standard_block` may also be used as a factory to create a
+        `NonStandardContentBlock`. Benefits include:
 
         * Automatic ID generation (when not provided)
         * Required arguments strictly validated at creation time
@@ -785,13 +795,14 @@ class NonStandardContentBlock(TypedDict):
     """Content block identifier.
 
     Either:
+
     - Generated by the provider (e.g., OpenAI's file ID)
-    - Generated by LangChain upon creation (``UUID4`` prefixed with ``'lc_'``))
+    - Generated by LangChain upon creation (`UUID4` prefixed with `'lc_'`))
 
     """
 
     value: dict[str, Any]
-    """Provider-specific data."""
+    """Provider-specific content data."""
 
     index: NotRequired[int | str]
     """Index of block in aggregate response. Used during streaming."""
@@ -805,6 +816,7 @@ DataContentBlock = (
     | PlainTextContentBlock
     | FileContentBlock
 )
+"""A union of all defined multimodal data `ContentBlock` types."""
 
 ToolContentBlock = (
     ToolCall | ToolCallChunk | ServerToolCall | ServerToolCallChunk | ServerToolResult
@@ -818,6 +830,7 @@ ContentBlock = (
     | DataContentBlock
     | ToolContentBlock
 )
+"""A union of all defined `ContentBlock` types and aliases."""
 
 
 KNOWN_BLOCK_TYPES = {
@@ -842,7 +855,7 @@ KNOWN_BLOCK_TYPES = {
     "non_standard",
     # citation and non_standard_annotation intentionally omitted
 }
-"""These are block types known to ``langchain-core>=1.0.0``.
+"""These are block types known to `langchain-core>=1.0.0`.
 
 If a block has a type not in this set, it is considered to be provider-specific.
 """
@@ -854,7 +867,7 @@ def _get_data_content_block_types() -> tuple[str, ...]:
     Example: ("image", "video", "audio", "text-plain", "file")
 
     Note that old style multimodal blocks type literals with new style blocks.
-    Speficially, "image", "audio", and "file".
+    Specifically, "image", "audio", and "file".
 
     See the docstring of `_normalize_messages` in `language_models._utils` for details.
     """
@@ -881,7 +894,7 @@ def is_data_content_block(block: dict) -> bool:
         block: The content block to check.
 
     Returns:
-        True if the content block is a data content block, False otherwise.
+        `True` if the content block is a data content block, `False` otherwise.
 
     """
     if block.get("type") not in _get_data_content_block_types():
@@ -893,7 +906,7 @@ def is_data_content_block(block: dict) -> bool:
 
         # 'text' is checked to support v0 PlainTextContentBlock types
         # We must guard against new style TextContentBlock which also has 'text' `type`
-        # by ensuring the presense of `source_type`
+        # by ensuring the presence of `source_type`
         if block["type"] == "text" and "source_type" not in block:  # noqa: SIM103  # This is more readable
             return False
 
@@ -923,20 +936,20 @@ def create_text_block(
     index: int | str | None = None,
     **kwargs: Any,
 ) -> TextContentBlock:
-    """Create a ``TextContentBlock``.
+    """Create a `TextContentBlock`.
 
     Args:
         text: The text content of the block.
         id: Content block identifier. Generated automatically if not provided.
-        annotations: ``Citation``s and other annotations for the text.
+        annotations: `Citation`s and other annotations for the text.
         index: Index of block in aggregate response. Used during streaming.
 
     Returns:
-        A properly formatted ``TextContentBlock``.
+        A properly formatted `TextContentBlock`.
 
     !!! note
-        The ``id`` is generated automatically if not provided, using a UUID4 format
-        prefixed with ``'lc_'`` to indicate it is a LangChain-generated ID.
+        The `id` is generated automatically if not provided, using a UUID4 format
+        prefixed with `'lc_'` to indicate it is a LangChain-generated ID.
 
     """
     block = TextContentBlock(
@@ -966,7 +979,7 @@ def create_image_block(
     index: int | str | None = None,
     **kwargs: Any,
 ) -> ImageContentBlock:
-    """Create an ``ImageContentBlock``.
+    """Create an `ImageContentBlock`.
 
     Args:
         url: URL of the image.
@@ -977,15 +990,15 @@ def create_image_block(
         index: Index of block in aggregate response. Used during streaming.
 
     Returns:
-        A properly formatted ``ImageContentBlock``.
+        A properly formatted `ImageContentBlock`.
 
     Raises:
-        ValueError: If no image source is provided or if ``base64`` is used without
-            ``mime_type``.
+        ValueError: If no image source is provided or if `base64` is used without
+            `mime_type`.
 
     !!! note
-        The ``id`` is generated automatically if not provided, using a UUID4 format
-        prefixed with ``'lc_'`` to indicate it is a LangChain-generated ID.
+        The `id` is generated automatically if not provided, using a UUID4 format
+        prefixed with `'lc_'` to indicate it is a LangChain-generated ID.
 
     """
     if not any([url, base64, file_id]):
@@ -1022,7 +1035,7 @@ def create_video_block(
     index: int | str | None = None,
     **kwargs: Any,
 ) -> VideoContentBlock:
-    """Create a ``VideoContentBlock``.
+    """Create a `VideoContentBlock`.
 
     Args:
         url: URL of the video.
@@ -1033,15 +1046,15 @@ def create_video_block(
         index: Index of block in aggregate response. Used during streaming.
 
     Returns:
-        A properly formatted ``VideoContentBlock``.
+        A properly formatted `VideoContentBlock`.
 
     Raises:
-        ValueError: If no video source is provided or if ``base64`` is used without
-            ``mime_type``.
+        ValueError: If no video source is provided or if `base64` is used without
+            `mime_type`.
 
     !!! note
-        The ``id`` is generated automatically if not provided, using a UUID4 format
-        prefixed with ``'lc_'`` to indicate it is a LangChain-generated ID.
+        The `id` is generated automatically if not provided, using a UUID4 format
+        prefixed with `'lc_'` to indicate it is a LangChain-generated ID.
 
     """
     if not any([url, base64, file_id]):
@@ -1082,7 +1095,7 @@ def create_audio_block(
     index: int | str | None = None,
     **kwargs: Any,
 ) -> AudioContentBlock:
-    """Create an ``AudioContentBlock``.
+    """Create an `AudioContentBlock`.
 
     Args:
         url: URL of the audio.
@@ -1093,15 +1106,15 @@ def create_audio_block(
         index: Index of block in aggregate response. Used during streaming.
 
     Returns:
-        A properly formatted ``AudioContentBlock``.
+        A properly formatted `AudioContentBlock`.
 
     Raises:
-        ValueError: If no audio source is provided or if ``base64`` is used without
-            ``mime_type``.
+        ValueError: If no audio source is provided or if `base64` is used without
+            `mime_type`.
 
     !!! note
-        The ``id`` is generated automatically if not provided, using a UUID4 format
-        prefixed with ``'lc_'`` to indicate it is a LangChain-generated ID.
+        The `id` is generated automatically if not provided, using a UUID4 format
+        prefixed with `'lc_'` to indicate it is a LangChain-generated ID.
 
     """
     if not any([url, base64, file_id]):
@@ -1142,7 +1155,7 @@ def create_file_block(
     index: int | str | None = None,
     **kwargs: Any,
 ) -> FileContentBlock:
-    """Create a ``FileContentBlock``.
+    """Create a `FileContentBlock`.
 
     Args:
         url: URL of the file.
@@ -1153,15 +1166,15 @@ def create_file_block(
         index: Index of block in aggregate response. Used during streaming.
 
     Returns:
-        A properly formatted ``FileContentBlock``.
+        A properly formatted `FileContentBlock`.
 
     Raises:
-        ValueError: If no file source is provided or if ``base64`` is used without
-            ``mime_type``.
+        ValueError: If no file source is provided or if `base64` is used without
+            `mime_type`.
 
     !!! note
-        The ``id`` is generated automatically if not provided, using a UUID4 format
-        prefixed with ``'lc_'`` to indicate it is a LangChain-generated ID.
+        The `id` is generated automatically if not provided, using a UUID4 format
+        prefixed with `'lc_'` to indicate it is a LangChain-generated ID.
 
     """
     if not any([url, base64, file_id]):
@@ -1203,7 +1216,7 @@ def create_plaintext_block(
     index: int | str | None = None,
     **kwargs: Any,
 ) -> PlainTextContentBlock:
-    """Create a ``PlainTextContentBlock``.
+    """Create a `PlainTextContentBlock`.
 
     Args:
         text: The plaintext content.
@@ -1216,11 +1229,11 @@ def create_plaintext_block(
         index: Index of block in aggregate response. Used during streaming.
 
     Returns:
-        A properly formatted ``PlainTextContentBlock``.
+        A properly formatted `PlainTextContentBlock`.
 
     !!! note
-        The ``id`` is generated automatically if not provided, using a UUID4 format
-        prefixed with ``'lc_'`` to indicate it is a LangChain-generated ID.
+        The `id` is generated automatically if not provided, using a UUID4 format
+        prefixed with `'lc_'` to indicate it is a LangChain-generated ID.
 
     """
     block = PlainTextContentBlock(
@@ -1259,7 +1272,7 @@ def create_tool_call(
     index: int | str | None = None,
     **kwargs: Any,
 ) -> ToolCall:
-    """Create a ``ToolCall``.
+    """Create a `ToolCall`.
 
     Args:
         name: The name of the tool to be called.
@@ -1268,11 +1281,11 @@ def create_tool_call(
         index: Index of block in aggregate response. Used during streaming.
 
     Returns:
-        A properly formatted ``ToolCall``.
+        A properly formatted `ToolCall`.
 
     !!! note
-        The ``id`` is generated automatically if not provided, using a UUID4 format
-        prefixed with ``'lc_'`` to indicate it is a LangChain-generated ID.
+        The `id` is generated automatically if not provided, using a UUID4 format
+        prefixed with `'lc_'` to indicate it is a LangChain-generated ID.
 
     """
     block = ToolCall(
@@ -1298,7 +1311,7 @@ def create_reasoning_block(
     index: int | str | None = None,
     **kwargs: Any,
 ) -> ReasoningContentBlock:
-    """Create a ``ReasoningContentBlock``.
+    """Create a `ReasoningContentBlock`.
 
     Args:
         reasoning: The reasoning text or thought summary.
@@ -1306,11 +1319,11 @@ def create_reasoning_block(
         index: Index of block in aggregate response. Used during streaming.
 
     Returns:
-        A properly formatted ``ReasoningContentBlock``.
+        A properly formatted `ReasoningContentBlock`.
 
     !!! note
-        The ``id`` is generated automatically if not provided, using a UUID4 format
-        prefixed with ``'lc_'`` to indicate it is a LangChain-generated ID.
+        The `id` is generated automatically if not provided, using a UUID4 format
+        prefixed with `'lc_'` to indicate it is a LangChain-generated ID.
 
     """
     block = ReasoningContentBlock(
@@ -1339,7 +1352,7 @@ def create_citation(
     id: str | None = None,
     **kwargs: Any,
 ) -> Citation:
-    """Create a ``Citation``.
+    """Create a `Citation`.
 
     Args:
         url: URL of the document source.
@@ -1350,11 +1363,11 @@ def create_citation(
         id: Content block identifier. Generated automatically if not provided.
 
     Returns:
-        A properly formatted ``Citation``.
+        A properly formatted `Citation`.
 
     !!! note
-        The ``id`` is generated automatically if not provided, using a UUID4 format
-        prefixed with ``'lc_'`` to indicate it is a LangChain-generated ID.
+        The `id` is generated automatically if not provided, using a UUID4 format
+        prefixed with `'lc_'` to indicate it is a LangChain-generated ID.
 
     """
     block = Citation(type="citation", id=ensure_id(id))
@@ -1383,19 +1396,19 @@ def create_non_standard_block(
     id: str | None = None,
     index: int | str | None = None,
 ) -> NonStandardContentBlock:
-    """Create a ``NonStandardContentBlock``.
+    """Create a `NonStandardContentBlock`.
 
     Args:
-        value: Provider-specific data.
+        value: Provider-specific content data.
         id: Content block identifier. Generated automatically if not provided.
         index: Index of block in aggregate response. Used during streaming.
 
     Returns:
-        A properly formatted ``NonStandardContentBlock``.
+        A properly formatted `NonStandardContentBlock`.
 
     !!! note
-        The ``id`` is generated automatically if not provided, using a UUID4 format
-        prefixed with ``'lc_'`` to indicate it is a LangChain-generated ID.
+        The `id` is generated automatically if not provided, using a UUID4 format
+        prefixed with `'lc_'` to indicate it is a LangChain-generated ID.
 
     """
     block = NonStandardContentBlock(

libs/core/langchain_core/messages/function.py

@@ -15,11 +15,11 @@ from langchain_core.utils._merge import merge_dicts
 class FunctionMessage(BaseMessage):
     """Message for passing the result of executing a tool back to a model.
 
-    ``FunctionMessage`` are an older version of the ``ToolMessage`` schema, and
-    do not contain the ``tool_call_id`` field.
+    `FunctionMessage` are an older version of the `ToolMessage` schema, and
+    do not contain the `tool_call_id` field.
 
-    The ``tool_call_id`` field is used to associate the tool call request with the
-    tool call response. This is useful in situations where a chat model is able
+    The `tool_call_id` field is used to associate the tool call request with the
+    tool call response. Useful in situations where a chat model is able
     to request multiple tool calls in parallel.
 
     """
@@ -28,7 +28,7 @@ class FunctionMessage(BaseMessage):
     """The name of the function that was executed."""
 
     type: Literal["function"] = "function"
-    """The type of the message (used for serialization). Defaults to ``'function'``."""
+    """The type of the message (used for serialization)."""
 
 
 class FunctionMessageChunk(FunctionMessage, BaseMessageChunk):
@@ -38,11 +38,7 @@ class FunctionMessageChunk(FunctionMessage, BaseMessageChunk):
     # to make sure that the chunk variant can be discriminated from the
     # non-chunk variant.
     type: Literal["FunctionMessageChunk"] = "FunctionMessageChunk"  # type: ignore[assignment]
-    """The type of the message (used for serialization).
-
-    Defaults to ``'FunctionMessageChunk'``.
-
-    """
+    """The type of the message (used for serialization)."""
 
     @override
     def __add__(self, other: Any) -> BaseMessageChunk:  # type: ignore[override]

libs/core/langchain_core/messages/human.py

@@ -7,33 +7,27 @@ from langchain_core.messages.base import BaseMessage, BaseMessageChunk
 
 
 class HumanMessage(BaseMessage):
-    """Message from a human.
+    """Message from the user.
 
-    ``HumanMessage``s are messages that are passed in from a human to the model.
+    A `HumanMessage` is a message that is passed in from a user to the model.
 
     Example:
+        ```python
+        from langchain_core.messages import HumanMessage, SystemMessage
 
-        .. code-block:: python
-
-            from langchain_core.messages import HumanMessage, SystemMessage
-
-            messages = [
-                SystemMessage(content="You are a helpful assistant! Your name is Bob."),
-                HumanMessage(content="What is your name?"),
-            ]
-
-            # Instantiate a chat model and invoke it with the messages
-            model = ...
-            print(model.invoke(messages))
+        messages = [
+            SystemMessage(content="You are a helpful assistant! Your name is Bob."),
+            HumanMessage(content="What is your name?"),
+        ]
 
+        # Instantiate a chat model and invoke it with the messages
+        model = ...
+        print(model.invoke(messages))
+        ```
     """
 
     type: Literal["human"] = "human"
-    """The type of the message (used for serialization).
-
-    Defaults to ``'human'``.
-
-    """
+    """The type of the message (used for serialization)."""
 
     @overload
     def __init__(
@@ -56,7 +50,7 @@ class HumanMessage(BaseMessage):
         content_blocks: list[types.ContentBlock] | None = None,
         **kwargs: Any,
     ) -> None:
-        """Specify ``content`` as positional arg or ``content_blocks`` for typing."""
+        """Specify `content` as positional arg or `content_blocks` for typing."""
         if content_blocks is not None:
             super().__init__(
                 content=cast("str | list[str | dict]", content_blocks),
@@ -73,5 +67,4 @@ class HumanMessageChunk(HumanMessage, BaseMessageChunk):
     # to make sure that the chunk variant can be discriminated from the
     # non-chunk variant.
     type: Literal["HumanMessageChunk"] = "HumanMessageChunk"  # type: ignore[assignment]
-    """The type of the message (used for serialization).
-    Defaults to "HumanMessageChunk"."""
+    """The type of the message (used for serialization)."""

libs/core/langchain_core/messages/modifier.py

@@ -9,7 +9,7 @@ class RemoveMessage(BaseMessage):
     """Message responsible for deleting other messages."""
 
     type: Literal["remove"] = "remove"
-    """The type of the message (used for serialization). Defaults to "remove"."""
+    """The type of the message (used for serialization)."""
 
     def __init__(
         self,
@@ -20,7 +20,7 @@ class RemoveMessage(BaseMessage):
 
         Args:
             id: The ID of the message to remove.
-            kwargs: Additional fields to pass to the message.
+            **kwargs: Additional fields to pass to the message.
 
         Raises:
             ValueError: If the 'content' field is passed in kwargs.

libs/core/langchain_core/messages/system.py

@@ -13,27 +13,21 @@ class SystemMessage(BaseMessage):
     of input messages.
 
     Example:
+        ```python
+        from langchain_core.messages import HumanMessage, SystemMessage
 
-        .. code-block:: python
-
-            from langchain_core.messages import HumanMessage, SystemMessage
-
-            messages = [
-                SystemMessage(content="You are a helpful assistant! Your name is Bob."),
-                HumanMessage(content="What is your name?"),
-            ]
-
-            # Define a chat model and invoke it with the messages
-            print(model.invoke(messages))
+        messages = [
+            SystemMessage(content="You are a helpful assistant! Your name is Bob."),
+            HumanMessage(content="What is your name?"),
+        ]
 
+        # Define a chat model and invoke it with the messages
+        print(model.invoke(messages))
+        ```
     """
 
     type: Literal["system"] = "system"
-    """The type of the message (used for serialization).
-
-    Defaults to ``'system'``.
-
-    """
+    """The type of the message (used for serialization)."""
 
     @overload
     def __init__(
@@ -56,7 +50,7 @@ class SystemMessage(BaseMessage):
         content_blocks: list[types.ContentBlock] | None = None,
         **kwargs: Any,
     ) -> None:
-        """Specify ``content`` as positional arg or ``content_blocks`` for typing."""
+        """Specify `content` as positional arg or `content_blocks` for typing."""
         if content_blocks is not None:
             super().__init__(
                 content=cast("str | list[str | dict]", content_blocks),
@@ -73,8 +67,4 @@ class SystemMessageChunk(SystemMessage, BaseMessageChunk):
     # to make sure that the chunk variant can be discriminated from the
     # non-chunk variant.
     type: Literal["SystemMessageChunk"] = "SystemMessageChunk"  # type: ignore[assignment]
-    """The type of the message (used for serialization).
-
-    Defaults to ``'SystemMessageChunk'``.
-
-    """
+    """The type of the message (used for serialization)."""

libs/core/langchain_core/messages/tool.py

@@ -16,9 +16,9 @@ from langchain_core.utils._merge import merge_dicts, merge_obj
 class ToolOutputMixin:
     """Mixin for objects that tools can return directly.
 
-    If a custom BaseTool is invoked with a ``ToolCall`` and the output of custom code is
-    not an instance of ``ToolOutputMixin``, the output will automatically be coerced to
-    a string and wrapped in a ``ToolMessage``.
+    If a custom BaseTool is invoked with a `ToolCall` and the output of custom code is
+    not an instance of `ToolOutputMixin`, the output will automatically be coerced to
+    a string and wrapped in a `ToolMessage`.
 
     """
 
@@ -26,42 +26,39 @@ class ToolOutputMixin:
 class ToolMessage(BaseMessage, ToolOutputMixin):
     """Message for passing the result of executing a tool back to a model.
 
-    ``ToolMessage``s contain the result of a tool invocation. Typically, the result
-    is encoded inside the ``content`` field.
+    `ToolMessage` objects contain the result of a tool invocation. Typically, the result
+    is encoded inside the `content` field.
 
-    Example: A ``ToolMessage`` representing a result of ``42`` from a tool call with id
+    Example: A `ToolMessage` representing a result of `42` from a tool call with id
 
-        .. code-block:: python
+    ```python
+    from langchain_core.messages import ToolMessage
 
-            from langchain_core.messages import ToolMessage
+    ToolMessage(content="42", tool_call_id="call_Jja7J89XsjrOLA5r!MEOW!SL")
+    ```
 
-            ToolMessage(content="42", tool_call_id="call_Jja7J89XsjrOLA5r!MEOW!SL")
+    Example: A `ToolMessage` where only part of the tool output is sent to the model
+    and the full output is passed in to artifact.
 
+    ```python
+    from langchain_core.messages import ToolMessage
 
-    Example: A ``ToolMessage`` where only part of the tool output is sent to the model
-        and the full output is passed in to artifact.
+    tool_output = {
+        "stdout": "From the graph we can see that the correlation between "
+        "x and y is ...",
+        "stderr": None,
+        "artifacts": {"type": "image", "base64_data": "/9j/4gIcSU..."},
+    }
 
-        !!! version-added "Added in version 0.2.17"
+    ToolMessage(
+        content=tool_output["stdout"],
+        artifact=tool_output,
+        tool_call_id="call_Jja7J89XsjrOLA5r!MEOW!SL",
+    )
+    ```
 
-        .. code-block:: python
-
-            from langchain_core.messages import ToolMessage
-
-            tool_output = {
-                "stdout": "From the graph we can see that the correlation between "
-                "x and y is ...",
-                "stderr": None,
-                "artifacts": {"type": "image", "base64_data": "/9j/4gIcSU..."},
-            }
-
-            ToolMessage(
-                content=tool_output["stdout"],
-                artifact=tool_output,
-                tool_call_id="call_Jja7J89XsjrOLA5r!MEOW!SL",
-            )
-
-    The ``tool_call_id`` field is used to associate the tool call request with the
-    tool call response. This is useful in situations where a chat model is able
+    The `tool_call_id` field is used to associate the tool call request with the
+    tool call response. Useful in situations where a chat model is able
     to request multiple tool calls in parallel.
 
     """
@@ -70,11 +67,7 @@ class ToolMessage(BaseMessage, ToolOutputMixin):
     """Tool call that this message is responding to."""
 
     type: Literal["tool"] = "tool"
-    """The type of the message (used for serialization).
-
-    Defaults to ``'tool'``.
-
-    """
+    """The type of the message (used for serialization)."""
 
     artifact: Any = None
     """Artifact of the Tool execution which is not meant to be sent to the model.
@@ -83,21 +76,15 @@ class ToolMessage(BaseMessage, ToolOutputMixin):
     a subset of the full tool output is being passed as message content but the full
     output is needed in other parts of the code.
 
-    !!! version-added "Added in version 0.2.17"
-
     """
 
     status: Literal["success", "error"] = "success"
-    """Status of the tool invocation.
-
-    !!! version-added "Added in version 0.2.24"
-
-    """
+    """Status of the tool invocation."""
 
     additional_kwargs: dict = Field(default_factory=dict, repr=False)
-    """Currently inherited from BaseMessage, but not used."""
+    """Currently inherited from `BaseMessage`, but not used."""
     response_metadata: dict = Field(default_factory=dict, repr=False)
-    """Currently inherited from BaseMessage, but not used."""
+    """Currently inherited from `BaseMessage`, but not used."""
 
     @model_validator(mode="before")
     @classmethod
@@ -165,12 +152,12 @@ class ToolMessage(BaseMessage, ToolOutputMixin):
         content_blocks: list[types.ContentBlock] | None = None,
         **kwargs: Any,
     ) -> None:
-        """Initialize ``ToolMessage``.
+        """Initialize a `ToolMessage`.
 
-        Specify ``content`` as positional arg or ``content_blocks`` for typing.
+        Specify `content` as positional arg or `content_blocks` for typing.
 
         Args:
-            content: The string contents of the message.
+            content: The contents of the message.
             content_blocks: Typed standard content.
             **kwargs: Additional fields.
         """
@@ -216,16 +203,15 @@ class ToolMessageChunk(ToolMessage, BaseMessageChunk):
 
 
 class ToolCall(TypedDict):
-    """Represents a request to call a tool.
+    """Represents an AI's request to call a tool.
 
     Example:
+        ```python
+        {"name": "foo", "args": {"a": 1}, "id": "123"}
+        ```
 
-        .. code-block:: python
-
-            {"name": "foo", "args": {"a": 1}, "id": "123"}
-
-        This represents a request to call the tool named ``'foo'`` with arguments
-        ``{"a": 1}`` and an identifier of ``'123'``.
+        This represents a request to call the tool named `'foo'` with arguments
+        `{"a": 1}` and an identifier of `'123'`.
 
     """
 
@@ -263,24 +249,22 @@ def tool_call(
 
 
 class ToolCallChunk(TypedDict):
-    """A chunk of a tool call (e.g., as part of a stream).
+    """A chunk of a tool call (yielded when streaming).
 
-    When merging ``ToolCallChunk``s (e.g., via ``AIMessageChunk.__add__``),
+    When merging `ToolCallChunk`s (e.g., via `AIMessageChunk.__add__`),
     all string attributes are concatenated. Chunks are only merged if their
-    values of ``index`` are equal and not None.
+    values of `index` are equal and not None.
 
     Example:
+    ```python
+    left_chunks = [ToolCallChunk(name="foo", args='{"a":', index=0)]
+    right_chunks = [ToolCallChunk(name=None, args="1}", index=0)]
 
-    .. code-block:: python
-
-        left_chunks = [ToolCallChunk(name="foo", args='{"a":', index=0)]
-        right_chunks = [ToolCallChunk(name=None, args="1}", index=0)]
-
-        (
-            AIMessageChunk(content="", tool_call_chunks=left_chunks)
-            + AIMessageChunk(content="", tool_call_chunks=right_chunks)
-        ).tool_call_chunks == [ToolCallChunk(name="foo", args='{"a":1}', index=0)]
-
+    (
+        AIMessageChunk(content="", tool_call_chunks=left_chunks)
+        + AIMessageChunk(content="", tool_call_chunks=right_chunks)
+    ).tool_call_chunks == [ToolCallChunk(name="foo", args='{"a":1}', index=0)]
+    ```
     """
 
     name: str | None

libs/core/langchain_core/output_parsers/__init__.py

@@ -1,17 +1,20 @@
-"""**OutputParser** classes parse the output of an LLM call.
+"""`OutputParser` classes parse the output of an LLM call into structured data.
 
-**Class hierarchy:**
+!!! tip "Structured output"
 
-.. code-block::
+    Output parsers emerged as an early solution to the challenge of obtaining structured
+    output from LLMs.
 
-    BaseLLMOutputParser --> BaseOutputParser --> <name>OutputParser  # ListOutputParser, PydanticOutputParser
+    Today, most LLMs support [structured output](https://docs.langchain.com/oss/python/langchain/models#structured-outputs)
+    natively. In such cases, using output parsers may be unnecessary, and you should
+    leverage the model's built-in capabilities for structured output. Refer to the
+    [documentation of your chosen model](https://docs.langchain.com/oss/python/integrations/providers/overview)
+    for guidance on how to achieve structured output directly.
 
-**Main helpers:**
-
-.. code-block::
-
-    Serializable, Generation, PromptValue
-"""  # noqa: E501
+    Output parsers remain valuable when working with models that do not support
+    structured output natively, or when you require additional processing or validation
+    of the model's output beyond its inherent capabilities.
+"""
 
 from typing import TYPE_CHECKING