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dependabot[bot] 15b0a4930b chore: bump jupyter-server from 2.18.0 to 2.20.0 in /libs/core (#38252) 
Bumps [jupyter-server](https://github.com/jupyter-server/jupyter_server)
from 2.18.0 to 2.20.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a
href="https://github.com/jupyter-server/jupyter_server/releases">jupyter-server's
releases</a>.</em></p>
<blockquote>
<h2>v2.20.0</h2>
<h2>2.20.0</h2>
<p>(<a
href="https://github.com/jupyter-server/jupyter_server/compare/v2.19.0...333e700119ee0bcc0b5fcd4c158213d7c275c778">Full
Changelog</a>)</p>
<h3>Security fixes</h3>
<ul>
<li>CVE-2026-44727 <a
href="https://github.com/jupyter-server/jupyter_server/security/advisories/GHSA-fcw5-x6j4-ccmp">GHSA-fcw5-x6j4-ccmp</a></li>
</ul>
<h3>Enhancements made</h3>
<ul>
<li>Fix confusing terminal output when using ServerApp.ip=0.0.0.0 <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1643">#1643</a>
(<a href="https://github.com/Yann-P"><code>@​Yann-P</code></a>, <a
href="https://github.com/minrk"><code>@​minrk</code></a>)</li>
<li>Add a toggle to enable curve encryption for all kernels that support
it <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1638">#1638</a>
(<a href="https://github.com/krassowski"><code>@​krassowski</code></a>,
<a href="https://github.com/Carreau"><code>@​Carreau</code></a>, <a
href="https://github.com/ianthomas23"><code>@​ianthomas23</code></a>, <a
href="https://github.com/minrk"><code>@​minrk</code></a>)</li>
</ul>
<h3>Bugs fixed</h3>
<ul>
<li>Grab the port from <code>bind_sockets</code> in case its different
<a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1651">#1651</a>
(<a href="https://github.com/choldgraf"><code>@​choldgraf</code></a>, <a
href="https://github.com/krassowski"><code>@​krassowski</code></a>)</li>
</ul>
<h3>Maintenance and upkeep improvements</h3>
<ul>
<li>Fix <code>test_authorizer</code> having a spurious comma in params
<a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1664">#1664</a>
(<a
href="https://github.com/krassowski"><code>@​krassowski</code></a>)</li>
<li>Add a reminder to merge GHSA before release <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1659">#1659</a>
(<a href="https://github.com/Yann-P"><code>@​Yann-P</code></a>, <a
href="https://github.com/Carreau"><code>@​Carreau</code></a>)</li>
<li>Exclude problematic <code>pywinpty</code> 3.0.4 version <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1658">#1658</a>
(<a
href="https://github.com/krassowski"><code>@​krassowski</code></a>)</li>
<li>ci: explicitly pass base-setup inputs to fix strict validation
failures <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1626">#1626</a>
(<a href="https://github.com/Carreau"><code>@​Carreau</code></a>, <a
href="https://github.com/Copilot"><code>@​Copilot</code></a>)</li>
</ul>
<h3>Documentation improvements</h3>
<ul>
<li>Align docs for curve encryption with latest JEP version <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1660">#1660</a>
(<a href="https://github.com/krassowski"><code>@​krassowski</code></a>,
<a href="https://github.com/Carreau"><code>@​Carreau</code></a>)</li>
<li>Remove PGP key from docs <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1653">#1653</a>
(<a href="https://github.com/Yann-P"><code>@​Yann-P</code></a>, <a
href="https://github.com/krassowski"><code>@​krassowski</code></a>)</li>
</ul>
<h3>Contributors to this release</h3>
<p>The following people contributed discussions, new ideas, code and
documentation contributions, and review.
See <a
href="https://github-activity.readthedocs.io/en/latest/use/#how-does-this-tool-define-contributions-in-the-reports">our
definition of contributors</a>.</p>
<p>(<a
href="https://github.com/jupyter-server/jupyter_server/graphs/contributors?from=2026-05-29&amp;to=2026-06-17&amp;type=c">GitHub
contributors page for this release</a>)</p>
<p><a href="https://github.com/Carreau"><code>@​Carreau</code></a> (<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3ACarreau+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a href="https://github.com/choldgraf"><code>@​choldgraf</code></a>
(<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3Acholdgraf+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a href="https://github.com/Copilot"><code>@​Copilot</code></a> (<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3ACopilot+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a
href="https://github.com/ianthomas23"><code>@​ianthomas23</code></a> (<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3Aianthomas23+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a href="https://github.com/krassowski"><code>@​krassowski</code></a>
(<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3Akrassowski+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a href="https://github.com/minrk"><code>@​minrk</code></a> (<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3Aminrk+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a href="https://github.com/Yann-P"><code>@​Yann-P</code></a> (<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3AYann-P+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)</p>
<h2>v2.19.0</h2>
<h2>2.19.0</h2>
<p>(<a
href="https://github.com/jupyter-server/jupyter_server/compare/v2.18.2...664e2255c71efe963f397b9f803dbcf503b5a920">Full
Changelog</a>)</p>
<h3>Enhancements made</h3>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a
href="https://github.com/jupyter-server/jupyter_server/blob/main/CHANGELOG.md">jupyter-server's
changelog</a>.</em></p>
<blockquote>
<h2>2.20.0</h2>
<p>(<a
href="https://github.com/jupyter-server/jupyter_server/compare/v2.19.0...333e700119ee0bcc0b5fcd4c158213d7c275c778">Full
Changelog</a>)</p>
<h3>Enhancements made</h3>
<ul>
<li>Fix confusing terminal output when using ServerApp.ip=0.0.0.0 <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1643">#1643</a>
(<a href="https://github.com/Yann-P"><code>@​Yann-P</code></a>, <a
href="https://github.com/minrk"><code>@​minrk</code></a>)</li>
<li>Add a toggle to enable curve encryption for all kernels that support
it <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1638">#1638</a>
(<a href="https://github.com/krassowski"><code>@​krassowski</code></a>,
<a href="https://github.com/Carreau"><code>@​Carreau</code></a>, <a
href="https://github.com/ianthomas23"><code>@​ianthomas23</code></a>, <a
href="https://github.com/minrk"><code>@​minrk</code></a>)</li>
</ul>
<h3>Bugs fixed</h3>
<ul>
<li>Grab the port from <code>bind_sockets</code> in case its different
<a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1651">#1651</a>
(<a href="https://github.com/choldgraf"><code>@​choldgraf</code></a>, <a
href="https://github.com/krassowski"><code>@​krassowski</code></a>)</li>
</ul>
<h3>Maintenance and upkeep improvements</h3>
<ul>
<li>Fix <code>test_authorizer</code> having a spurious comma in params
<a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1664">#1664</a>
(<a
href="https://github.com/krassowski"><code>@​krassowski</code></a>)</li>
<li>Add a reminder to merge GHSA before release <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1659">#1659</a>
(<a href="https://github.com/Yann-P"><code>@​Yann-P</code></a>, <a
href="https://github.com/Carreau"><code>@​Carreau</code></a>)</li>
<li>Exclude problematic <code>pywinpty</code> 3.0.4 version <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1658">#1658</a>
(<a
href="https://github.com/krassowski"><code>@​krassowski</code></a>)</li>
<li>ci: explicitly pass base-setup inputs to fix strict validation
failures <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1626">#1626</a>
(<a href="https://github.com/Carreau"><code>@​Carreau</code></a>, <a
href="https://github.com/Copilot"><code>@​Copilot</code></a>)</li>
</ul>
<h3>Documentation improvements</h3>
<ul>
<li>Align docs for curve encryption with latest JEP version <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1660">#1660</a>
(<a href="https://github.com/krassowski"><code>@​krassowski</code></a>,
<a href="https://github.com/Carreau"><code>@​Carreau</code></a>)</li>
<li>Remove PGP key from docs <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1653">#1653</a>
(<a href="https://github.com/Yann-P"><code>@​Yann-P</code></a>, <a
href="https://github.com/krassowski"><code>@​krassowski</code></a>)</li>
</ul>
<h3>Contributors to this release</h3>
<p>The following people contributed discussions, new ideas, code and
documentation contributions, and review.
See <a
href="https://github-activity.readthedocs.io/en/latest/use/#how-does-this-tool-define-contributions-in-the-reports">our
definition of contributors</a>.</p>
<p>(<a
href="https://github.com/jupyter-server/jupyter_server/graphs/contributors?from=2026-05-29&amp;to=2026-06-17&amp;type=c">GitHub
contributors page for this release</a>)</p>
<p><a href="https://github.com/Carreau"><code>@​Carreau</code></a> (<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3ACarreau+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a href="https://github.com/choldgraf"><code>@​choldgraf</code></a>
(<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3Acholdgraf+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a href="https://github.com/Copilot"><code>@​Copilot</code></a> (<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3ACopilot+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a
href="https://github.com/ianthomas23"><code>@​ianthomas23</code></a> (<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3Aianthomas23+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a href="https://github.com/krassowski"><code>@​krassowski</code></a>
(<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3Akrassowski+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a href="https://github.com/minrk"><code>@​minrk</code></a> (<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3Aminrk+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)
| <a href="https://github.com/Yann-P"><code>@​Yann-P</code></a> (<a
href="https://github.com/search?q=repo%3Ajupyter-server%2Fjupyter_server+involves%3AYann-P+updated%3A2026-05-29..2026-06-17&amp;type=Issues">activity</a>)</p>
<!-- raw HTML omitted -->
<h2>2.19.0</h2>
<p>(<a
href="https://github.com/jupyter-server/jupyter_server/compare/v2.18.2...664e2255c71efe963f397b9f803dbcf503b5a920">Full
Changelog</a>)</p>
<h3>Enhancements made</h3>
<ul>
<li>Return <code>unresolved</code> stanza when kernel scope is
unavailable for <code>resolvePath</code> (instead of failing with 404)
<a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1641">#1641</a>
(<a href="https://github.com/MUFFANUJ"><code>@​MUFFANUJ</code></a>, <a
href="https://github.com/Carreau"><code>@​Carreau</code></a>, <a
href="https://github.com/krassowski"><code>@​krassowski</code></a>)</li>
</ul>
<h3>Bugs fixed</h3>
<ul>
<li>Recreate notary store on failure to prevent save deadlock and data
loss <a
href="https://redirect.github.com/jupyter-server/jupyter_server/pull/1640">#1640</a>
(<a href="https://github.com/krassowski"><code>@​krassowski</code></a>,
<a href="https://github.com/Carreau"><code>@​Carreau</code></a>)</li>
</ul>
<h3>Maintenance and upkeep improvements</h3>
<!-- raw HTML omitted -->
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a
href="05a78ad879"><code>05a78ad</code></a>
Publish 2.20.0</li>
<li><a
href="6cbee8d65e"><code>6cbee8d</code></a>
Merge commit from fork</li>
<li><a
href="333e700119"><code>333e700</code></a>
Fix <code>test_authorizer</code> having a spurious comma in params (<a
href="https://redirect.github.com/jupyter-server/jupyter_server/issues/1664">#1664</a>)</li>
<li><a
href="cccd543352"><code>cccd543</code></a>
Fix CI: explicitly pass base-setup inputs to avoid strict validation
failures</li>
<li><a
href="cd16d715df"><code>cd16d71</code></a>
Align docs for curve encryption with latest JEP version (<a
href="https://redirect.github.com/jupyter-server/jupyter_server/issues/1660">#1660</a>)</li>
<li><a
href="e458061e6e"><code>e458061</code></a>
Add a toggle to enable curve encryption for all kernels that support it
(<a
href="https://redirect.github.com/jupyter-server/jupyter_server/issues/1638">#1638</a>)</li>
<li><a
href="0ceeb4fb61"><code>0ceeb4f</code></a>
Add note in RELEASE.md</li>
<li><a
href="b13f8a241b"><code>b13f8a2</code></a>
Markdown does not work.</li>
<li><a
href="e885b10a26"><code>e885b10</code></a>
Add GHSA reminder in prep-release</li>
<li><a
href="0e28c901e8"><code>0e28c90</code></a>
Exclude problematic <code>pywinpty</code> 3.0.4 version (<a
href="https://redirect.github.com/jupyter-server/jupyter_server/issues/1658">#1658</a>)</li>
<li>Additional commits viewable in <a
href="https://github.com/jupyter-server/jupyter_server/compare/v2.18.0...v2.20.0">compare
view</a></li>
</ul>
</details>
<br />


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Co-authored-by: Mason Daugherty <mason@langchain.dev>
2026-06-18 19:29:29 +00:00
..
langchain_core
release(core): 1.4.8 (#38254)
2026-06-18 15:23:00 -04:00
scripts
release(core): 1.4.7 (#38111)
2026-06-12 14:54:25 -04:00
tests
release(core): 1.4.8 (#38254)
2026-06-18 15:23:00 -04:00
extended_testing_deps.txt
core: remove mustache in extended deps (#27629)
2024-10-24 22:12:49 -04:00
Makefile
chore(core): reduce streaming metadata / perf (#36588)
2026-04-10 10:47:54 -04:00
pyproject.toml
release(core): 1.4.8 (#38254)
2026-06-18 15:23:00 -04:00
README.md
docs: refresh README installation and resources (#38119)
2026-06-12 17:38:22 -04:00
uv.lock
chore: bump jupyter-server from 2.18.0 to 2.20.0 in /libs/core (#38252)
2026-06-18 19:29:29 +00:00

README.md

🦜🍎️ 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
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