Files
langchain/libs/core
dependabot[bot] 40cf649486 chore: bump langsmith from 0.8.0 to 0.8.18 in /libs/core (#38319)
Bumps [langsmith](https://github.com/langchain-ai/langsmith-sdk) from
0.8.0 to 0.8.18.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/langchain-ai/langsmith-sdk/releases">langsmith's
releases</a>.</em></p>
<blockquote>
<h2>v0.8.18</h2>
<h2>What's Changed</h2>
<ul>
<li>chore(deps-dev): bump vitest from 3.2.4 to 3.2.6 in /js by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a>[bot]
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3002">langchain-ai/langsmith-sdk#3002</a></li>
<li>chore(deps): bump pyjwt from 2.12.1 to 2.13.0 in /python by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a>[bot]
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3030">langchain-ai/langsmith-sdk#3030</a></li>
<li>chore(deps): bump python-multipart from 0.0.27 to 0.0.31 in /python
by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a>[bot]
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3036">langchain-ai/langsmith-sdk#3036</a></li>
<li>chore(deps): bump aiohttp from 3.14.0 to 3.14.1 in /python by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a>[bot]
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3037">langchain-ai/langsmith-sdk#3037</a></li>
<li>chore(deps): bump cryptography from 46.0.7 to 48.0.1 in /python by
<a
href="https://github.com/dependabot"><code>@​dependabot</code></a>[bot]
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3038">langchain-ai/langsmith-sdk#3038</a></li>
<li>chore(deps): bump starlette from 1.0.1 to 1.3.1 in /python by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a>[bot]
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3039">langchain-ai/langsmith-sdk#3039</a></li>
<li>chore(deps-dev): bump langchain-anthropic from 1.4.4 to 1.4.6 in
/python by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a>[bot]
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3044">langchain-ai/langsmith-sdk#3044</a></li>
<li>chore(deps): bump the npm_and_yarn group across 4 directories with 4
updates by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a>[bot]
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3046">langchain-ai/langsmith-sdk#3046</a></li>
<li>chore(deps): bump the npm_and_yarn group across 2 directories with 2
updates by <a
href="https://github.com/dependabot"><code>@​dependabot</code></a>[bot]
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3060">langchain-ai/langsmith-sdk#3060</a></li>
<li>test(python): fix integration assertions for updated attachment
error message by <a
href="https://github.com/QuentinBrosse"><code>@​QuentinBrosse</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3061">langchain-ai/langsmith-sdk#3061</a></li>
<li>chore: reconcile bumpversion config and mandate release process for
agents by <a
href="https://github.com/QuentinBrosse"><code>@​QuentinBrosse</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3062">langchain-ai/langsmith-sdk#3062</a></li>
<li>release(py): 0.8.18 by <a
href="https://github.com/QuentinBrosse"><code>@​QuentinBrosse</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3063">langchain-ai/langsmith-sdk#3063</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/langchain-ai/langsmith-sdk/compare/v0.8.17...v0.8.18">https://github.com/langchain-ai/langsmith-sdk/compare/v0.8.17...v0.8.18</a></p>
<h2>v0.8.17</h2>
<h2>What's Changed</h2>
<ul>
<li>feat: expose the resources from the generated openapi client in the
langsmith client by <a
href="https://github.com/sineha-mani"><code>@​sineha-mani</code></a> in
<a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3018">langchain-ai/langsmith-sdk#3018</a></li>
<li>feat(js): port <code>isTracingEnabled</code> utility from Python by
<a href="https://github.com/dqbd"><code>@​dqbd</code></a> in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3032">langchain-ai/langsmith-sdk#3032</a></li>
<li>Add sandbox mount support to JS SDK by <a
href="https://github.com/DanielKneipp"><code>@​DanielKneipp</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3010">langchain-ai/langsmith-sdk#3010</a></li>
<li>release(js): bump to 0.7.9 by <a
href="https://github.com/dqbd"><code>@​dqbd</code></a> in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3035">langchain-ai/langsmith-sdk#3035</a></li>
<li>Add sandbox mount support to Python SDK by <a
href="https://github.com/DanielKneipp"><code>@​DanielKneipp</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3009">langchain-ai/langsmith-sdk#3009</a></li>
<li>docs: note that _openapi_client directories are auto-generated by <a
href="https://github.com/KiewanVillatel"><code>@​KiewanVillatel</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3034">langchain-ai/langsmith-sdk#3034</a></li>
<li>fix: update JS SDK type declarations with skipLibCheck disabled by
<a href="https://github.com/sineha-mani"><code>@​sineha-mani</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3043">langchain-ai/langsmith-sdk#3043</a></li>
<li>release(js): 0.7.10 by <a
href="https://github.com/dqbd"><code>@​dqbd</code></a> in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3045">langchain-ai/langsmith-sdk#3045</a></li>
<li>feat: adding python async for online evals by <a
href="https://github.com/sineha-mani"><code>@​sineha-mani</code></a> in
<a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3048">langchain-ai/langsmith-sdk#3048</a></li>
<li>Add sandbox Git mount SDK helpers by <a
href="https://github.com/DanielKneipp"><code>@​DanielKneipp</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3040">langchain-ai/langsmith-sdk#3040</a></li>
<li>fix: use insights tab in sdk report links [closes LSO-2936] by <a
href="https://github.com/eric-langchain"><code>@​eric-langchain</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3050">langchain-ai/langsmith-sdk#3050</a></li>
<li>feat(client): warn when backend version is below minimum required by
<a
href="https://github.com/KiewanVillatel"><code>@​KiewanVillatel</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3041">langchain-ai/langsmith-sdk#3041</a></li>
<li>chore: bump _MIN_BACKEND_VERSION to 0.16.5rc1 by <a
href="https://github.com/langtions-bot"><code>@​langtions-bot</code></a>[bot]
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3053">langchain-ai/langsmith-sdk#3053</a></li>
<li>fix(sandbox): use built-in gcp auth host matching by <a
href="https://github.com/DanielKneipp"><code>@​DanielKneipp</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3055">langchain-ai/langsmith-sdk#3055</a></li>
<li>chore(python): py to 0.8.17 by <a
href="https://github.com/sineha-mani"><code>@​sineha-mani</code></a> in
<a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3056">langchain-ai/langsmith-sdk#3056</a></li>
</ul>
<h2>New Contributors</h2>
<ul>
<li><a
href="https://github.com/sineha-mani"><code>@​sineha-mani</code></a>
made their first contribution in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3018">langchain-ai/langsmith-sdk#3018</a></li>
<li><a
href="https://github.com/eric-langchain"><code>@​eric-langchain</code></a>
made their first contribution in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3050">langchain-ai/langsmith-sdk#3050</a></li>
</ul>
<p><strong>Full Changelog</strong>: <a
href="https://github.com/langchain-ai/langsmith-sdk/compare/v0.8.16...v0.8.17">https://github.com/langchain-ai/langsmith-sdk/compare/v0.8.16...v0.8.17</a></p>
<h2>v0.8.16</h2>
<h2>What's Changed</h2>
<ul>
<li>feat(py): add sync/async conversion for Sandbox and SandboxClient
[INF-0000] by <a
href="https://github.com/ramon-langchain"><code>@​ramon-langchain</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3019">langchain-ai/langsmith-sdk#3019</a></li>
<li>fix(experiments): extract keys from wrapped evaluator function by <a
href="https://github.com/shamikkarkhanis"><code>@​shamikkarkhanis</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3014">langchain-ai/langsmith-sdk#3014</a></li>
<li>chore: repoint <a
href="mailto:support@langchain.dev">support@langchain.dev</a> mentions
to the Support Portal by <a
href="https://github.com/lutan-langchain"><code>@​lutan-langchain</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3024">langchain-ai/langsmith-sdk#3024</a></li>
<li>fix(python): derive create_child run id from start_time [LSDK-220]
by <a
href="https://github.com/harisaiharish"><code>@​harisaiharish</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3027">langchain-ai/langsmith-sdk#3027</a></li>
<li>chore: sync langsmith_api by <a
href="https://github.com/langtions-bot"><code>@​langtions-bot</code></a>[bot]
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3020">langchain-ai/langsmith-sdk#3020</a></li>
<li>chore: js to 0.7.8 and py to 0.8.16 by <a
href="https://github.com/shamikkarkhanis"><code>@​shamikkarkhanis</code></a>
in <a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/pull/3029">langchain-ai/langsmith-sdk#3029</a></li>
</ul>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="31c2bf650b"><code>31c2bf6</code></a>
release(py): 0.8.18 (<a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/issues/3063">#3063</a>)</li>
<li><a
href="8955b68868"><code>8955b68</code></a>
chore: reconcile bumpversion config and mandate release process for
agents (#...</li>
<li><a
href="411401f6ca"><code>411401f</code></a>
test(python): fix integration assertions for updated attachment error
message...</li>
<li><a
href="9c5515620f"><code>9c55156</code></a>
Merge commit from fork</li>
<li><a
href="5b2bd8db3c"><code>5b2bd8d</code></a>
chore(deps): bump the npm_and_yarn group across 2 directories with 2
updates ...</li>
<li><a
href="d8642f9099"><code>d8642f9</code></a>
chore(deps): bump the npm_and_yarn group across 4 directories with 4
updates ...</li>
<li><a
href="953c2e5e25"><code>953c2e5</code></a>
chore(deps-dev): bump langchain-anthropic from 1.4.4 to 1.4.6 in /python
(<a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/issues/3044">#3044</a>)</li>
<li><a
href="5513699e2d"><code>5513699</code></a>
chore(deps): bump starlette from 1.0.1 to 1.3.1 in /python (<a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/issues/3039">#3039</a>)</li>
<li><a
href="8becdefdf4"><code>8becdef</code></a>
chore(deps): bump cryptography from 46.0.7 to 48.0.1 in /python (<a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/issues/3038">#3038</a>)</li>
<li><a
href="1a9c522feb"><code>1a9c522</code></a>
chore(deps): bump aiohttp from 3.14.0 to 3.14.1 in /python (<a
href="https://redirect.github.com/langchain-ai/langsmith-sdk/issues/3037">#3037</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/langchain-ai/langsmith-sdk/compare/v0.8.0...v0.8.18">compare
view</a></li>
</ul>
</details>
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🦜🍎 LangChain Core

PyPI - Version PyPI - License PyPI - Downloads Twitter

Looking for the JS/TS version? Check out LangChain.js.

To help you ship LangChain apps to production faster, check out LangSmith. LangSmith is a unified developer platform for building, testing, and monitoring LLM applications.

Quick Install

uv add langchain-core

🤔 What is this?

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.

⛰️ Why build on top of LangChain Core?

The LangChain ecosystem is built on top of langchain-core. Some of the benefits:

  • Modularity: We've designed Core around abstractions that are independent of each other, and not tied to any specific model provider.
  • 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. For conceptual guides, tutorials, and examples on using LangChain, see the LangChain Docs. You can also chat with the docs using Chat LangChain.

📕 Releases & Versioning

See our Releases and 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.

Resources

  • LangChain Academy — comprehensive, free courses on LangChain libraries and products, made by the LangChain team
  • Code of Conduct — community guidelines and standards