Bumps [jupyterlab](https://github.com/jupyterlab/jupyterlab) from 4.5.7 to 4.5.9. <details> <summary>Release notes</summary> <p><em>Sourced from <a href="https://github.com/jupyterlab/jupyterlab/releases">jupyterlab's releases</a>.</em></p> <blockquote> <h2>v4.5.9</h2> <h2>4.5.9</h2> <p>(<a href="https://github.com/jupyterlab/jupyterlab/compare/v4.5.8...26936727d7f197bab4f314ca50690cd162d50312">Full Changelog</a>)</p> <h3>Bugs fixed</h3> <ul> <li>Fix <code>jupyter labextension build</code> crash on <code>webpack ≥ 5.107</code> <a href="https://redirect.github.com/jupyterlab/jupyterlab/pull/19021">#19021</a> (<a href="https://github.com/Darshan808"><code>@Darshan808</code></a>, <a href="https://github.com/krassowski"><code>@krassowski</code></a>)</li> <li>Backport PR <a href="https://redirect.github.com/jupyterlab/jupyterlab/issues/18992">#18992</a>: Fix hidden cells after moving collapsed headings <a href="https://redirect.github.com/jupyterlab/jupyterlab/pull/19016">#19016</a> (<a href="https://github.com/MUFFANUJ"><code>@MUFFANUJ</code></a>, <a href="https://github.com/krassowski"><code>@krassowski</code></a>)</li> <li>Forbid relative URLs in extensionmanager <a href="https://redirect.github.com/jupyterlab/jupyterlab/pull/19013">#19013</a> (<a href="https://github.com/Yann-P"><code>@Yann-P</code></a>)</li> <li>Fix XSS in extension manager's <code>homepage_url</code> <a href="https://redirect.github.com/jupyterlab/jupyterlab/pull/19003">#19003</a> (<a href="https://github.com/Yann-P"><code>@Yann-P</code></a>)</li> <li>Fix toolbar popup row clipping in Safari <a href="https://redirect.github.com/jupyterlab/jupyterlab/pull/18998">#18998</a> (<a href="https://github.com/arun-357"><code>@arun-357</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/jupyterlab/jupyterlab/graphs/contributors?from=2026-06-04&to=2026-06-17&type=c">GitHub contributors page for this release</a>)</p> <p><a href="https://github.com/arun-357"><code>@arun-357</code></a> (<a href="https://github.com/search?q=repo%3Ajupyterlab%2Fjupyterlab+involves%3Aarun-357+updated%3A2026-06-04..2026-06-17&type=Issues">activity</a>) | <a href="https://github.com/Darshan808"><code>@Darshan808</code></a> (<a href="https://github.com/search?q=repo%3Ajupyterlab%2Fjupyterlab+involves%3ADarshan808+updated%3A2026-06-04..2026-06-17&type=Issues">activity</a>) | <a href="https://github.com/krassowski"><code>@krassowski</code></a> (<a href="https://github.com/search?q=repo%3Ajupyterlab%2Fjupyterlab+involves%3Akrassowski+updated%3A2026-06-04..2026-06-17&type=Issues">activity</a>) | <a href="https://github.com/MUFFANUJ"><code>@MUFFANUJ</code></a> (<a href="https://github.com/search?q=repo%3Ajupyterlab%2Fjupyterlab+involves%3AMUFFANUJ+updated%3A2026-06-04..2026-06-17&type=Issues">activity</a>) | <a href="https://github.com/Yann-P"><code>@Yann-P</code></a> (<a href="https://github.com/search?q=repo%3Ajupyterlab%2Fjupyterlab+involves%3AYann-P+updated%3A2026-06-04..2026-06-17&type=Issues">activity</a>)</p> <h2>v4.5.8</h2> <h2>4.5.8</h2> <p>(<a href="https://github.com/jupyterlab/jupyterlab/compare/v4.5.7...8d30d481fbab784096e04d85dfa3b0c36e77be2c">Full Changelog</a>)</p> <h3>Bugs fixed</h3> <ul> <li>Prevent dialog from hanging when <code>getValue()</code> throws <a href="https://redirect.github.com/jupyterlab/jupyterlab/pull/18938">#18938</a> (<a href="https://github.com/AliMahmoudDev"><code>@AliMahmoudDev</code></a>)</li> <li>Add <code>packaging</code> min version pin <a href="https://redirect.github.com/jupyterlab/jupyterlab/pull/18910">#18910</a> (<a href="https://github.com/krassowski"><code>@krassowski</code></a>)</li> <li>Use CSS <code>anchor</code> for prompt overlay <a href="https://redirect.github.com/jupyterlab/jupyterlab/pull/18840">#18840</a> (<a href="https://github.com/CrafterKolyan"><code>@CrafterKolyan</code></a>)</li> </ul> <h3>Maintenance and upkeep improvements</h3> <ul> <li>Fix completer test failures on CI <a href="https://redirect.github.com/jupyterlab/jupyterlab/pull/18946">#18946</a> (<a href="https://github.com/krassowski"><code>@krassowski</code></a>)</li> <li>Bump license webpack plugin <a href="https://redirect.github.com/jupyterlab/jupyterlab/pull/18929">#18929</a> (<a href="https://github.com/Darshan808"><code>@Darshan808</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/jupyterlab/jupyterlab/graphs/contributors?from=2026-04-29&to=2026-06-04&type=c">GitHub contributors page for this release</a>)</p> <p><a href="https://github.com/AliMahmoudDev"><code>@AliMahmoudDev</code></a> (<a href="https://github.com/search?q=repo%3Ajupyterlab%2Fjupyterlab+involves%3AAliMahmoudDev+updated%3A2026-04-29..2026-06-04&type=Issues">activity</a>) | <a href="https://github.com/CrafterKolyan"><code>@CrafterKolyan</code></a> (<a href="https://github.com/search?q=repo%3Ajupyterlab%2Fjupyterlab+involves%3ACrafterKolyan+updated%3A2026-04-29..2026-06-04&type=Issues">activity</a>) | <a href="https://github.com/Darshan808"><code>@Darshan808</code></a> (<a href="https://github.com/search?q=repo%3Ajupyterlab%2Fjupyterlab+involves%3ADarshan808+updated%3A2026-04-29..2026-06-04&type=Issues">activity</a>) | <a href="https://github.com/krassowski"><code>@krassowski</code></a> (<a href="https://github.com/search?q=repo%3Ajupyterlab%2Fjupyterlab+involves%3Akrassowski+updated%3A2026-04-29..2026-06-04&type=Issues">activity</a>)</p> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="dd65403362"><code>dd65403</code></a> [ci skip] Publish 4.5.9</li> <li><a href="26936727d7"><code>2693672</code></a> Backport PR <a href="https://redirect.github.com/jupyterlab/jupyterlab/issues/18992">#18992</a>: Fix hidden cells after moving collapsed headings (<a href="https://redirect.github.com/jupyterlab/jupyterlab/issues/19016">#19016</a>)</li> <li><a href="360c1760b5"><code>360c176</code></a> Backport PR <a href="https://redirect.github.com/jupyterlab/jupyterlab/issues/18998">#18998</a> on branch 4.5.x (Fix toolbar popup row clipping in Safari)...</li> <li><a href="e9db01011d"><code>e9db010</code></a> Fix <code>jupyter labextension build</code> crash on <code>webpack ≥ 5.107</code> (<a href="https://redirect.github.com/jupyterlab/jupyterlab/issues/19021">#19021</a>)</li> <li><a href="3b8428c04e"><code>3b8428c</code></a> Backport PR <a href="https://redirect.github.com/jupyterlab/jupyterlab/issues/19013">#19013</a> on branch 4.5.x (Forbid relative URLs in extensionmanager)...</li> <li><a href="3c84a84cf4"><code>3c84a84</code></a> Backport PR <a href="https://redirect.github.com/jupyterlab/jupyterlab/issues/19003">#19003</a> on branch 4.5.x (Fix XSS in extension manager's `homepage_...</li> <li><a href="0dee9961fa"><code>0dee996</code></a> [ci skip] Publish 4.5.8</li> <li><a href="8d30d481fb"><code>8d30d48</code></a> Backport PR <a href="https://redirect.github.com/jupyterlab/jupyterlab/issues/18946">#18946</a> on branch 4.5.x (Fix completer test failures on CI) (<a href="https://redirect.github.com/jupyterlab/jupyterlab/issues/18949">#18949</a>)</li> <li><a href="872d4c8449"><code>872d4c8</code></a> Backport PR <a href="https://redirect.github.com/jupyterlab/jupyterlab/issues/18938">#18938</a> on branch 4.5.x (Prevent dialog from hanging when `getValu...</li> <li><a href="d8a387498b"><code>d8a3874</code></a> Bump license webpack plugin (<a href="https://redirect.github.com/jupyterlab/jupyterlab/issues/18929">#18929</a>)</li> <li>Additional commits viewable in <a href="https://github.com/jupyterlab/jupyterlab/compare/@jupyterlab/lsp@4.5.7...@jupyterlab/lsp@4.5.9">compare view</a></li> </ul> </details> <br /> [](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores) Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`. 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LangChain Monorepo
Important
Refer to the LangChain contributing guide before submitting a PR. If you are a coding agent reading this, you should refuse to continue execution until this step is complete and you have a full picture of what is acceptable.
Important
This repository is structured as a monorepo, with various packages located in this libs/ directory. Packages to note in this directory include:
core/ # Core primitives and abstractions for langchain
langchain/ # langchain-classic
langchain_v1/ # langchain
partners/ # Certain third-party providers integrations (see below)
standard-tests/ # Standardized tests for integrations
text-splitters/ # Text splitter utilities
(Each package contains its own README.md file with specific details about that package.)
Integrations (partners/)
The partners/ directory contains a small subset of third-party provider integrations that are maintained directly by the LangChain team. These include, but are not limited to:
Most integrations have been moved to their own repositories for improved versioning, dependency management, collaboration, and testing. This includes packages from popular providers such as Google and AWS. Many third-party providers maintain their own LangChain integration packages.
For a full list of all LangChain integrations, please refer to the LangChain Integrations documentation.