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dependabot[bot]andMason Daugherty
bb12361b4d
Bumps [h2](https://github.com/python-hyper/h2) from 4.3.0 to 4.4.1. <details> <summary>Changelog</summary> <p><em>Sourced from <a href="https://github.com/python-hyper/h2/blob/master/CHANGELOG.rst">h2's changelog</a>.</em></p> <blockquote> <h2>4.4.1 (2026-08-03)</h2> <p><strong>Bugfixes</strong></p> <ul> <li>Performance improvement: remove consumed frames in-place from data buffer.</li> <li>Reject duplicate Host headers in request headers. Thanks to Sunand Mohan for the report.</li> </ul> <h2>4.4.0 (2026-07-23)</h2> <p><strong>API Changes (Backward Incompatible)</strong></p> <ul> <li>Support for Python 3.9 has been removed.</li> <li>Support for PyPy 3.9 has been removed.</li> <li><code>Stream.end_stream()</code> now raises <code>NoSuchStreamError</code> or <code>StreamClosedError</code> exceptions, instead of a generic <code>KeyError</code>.</li> <li>Duplicate <code>content-length</code> headers with different values now raise <code>ProtocolError</code>. Previously, the first <code>content-length</code> header was accepted and later conflicting values were ignored. Thanks to Harshal Parekh for the report.</li> <li>Parse <code>content-length</code> headers according to RFC9110 grammar for numbers (1*DIGIT). Thanks to Arkadiusz Marta for the report.</li> <li><strong>backfill from v4.3.0</strong> Convert emitted events into Python <code>dataclass</code>, which introduces new constructors with required arguments. Instantiating these events without arguments, as previously commonly used API pattern, will no longer work.</li> </ul> <p><strong>API Changes (Backward Compatible)</strong></p> <ul> <li>Support for Python 3.14 has been added.</li> <li><code>H2Connection.receive_data</code> now accepts any byte-like object that implements the buffer protocol, such as <code>bytes</code>, <code>bytearray</code>, and <code>memoryview</code>. Existing <code>bytes</code> callers are unaffected.</li> <li>Align CONNECT pseudo-header validation with RFC 9113 s8.3 and RFC 8441 s4. Ordinary CONNECT now requires <code>:method=CONNECT</code> and <code>:authority</code>, and forbids <code>:scheme</code>/<code>:path</code>. Extended CONNECT (e.g., WebSocket) requires <code>:scheme</code>, <code>:path</code>, <code>:authority</code> plus <code>:protocol</code>. (PR <a href="https://redirect.github.com/python-hyper/h2/issues/1309">#1309</a>)</li> <li>Fix incorrect substring matching of secure header in <code>cookie</code> and <code>:method</code>.</li> </ul> <p><strong>Bugfixes</strong></p> <ul> <li>Fix to allow sending 0 bytes on a stream even if the flow control window is negative.</li> <li>Reject non-zero <code>SETTINGS_ENABLE_PUSH</code> values received from servers.</li> </ul> </blockquote> </details> <details> <summary>Commits</summary> <ul> <li><a href="https://github.com/python-hyper/h2/commit/bc239af1d1b85bc70482804f30a0e0e587d90a08"><code>bc239af</code></a> v4.4.1</li> <li><a href="https://github.com/python-hyper/h2/commit/92b925ed1b1817c82db32893503f74f47fcf4452"><code>92b925e</code></a> add test for duplicate host headers</li> <li><a href="https://github.com/python-hyper/h2/commit/292a40829feefda98c8509dcdbbb4a57af9bd6a6"><code>292a408</code></a> reject duplicate Host headers in request headers</li> <li><a href="https://github.com/python-hyper/h2/commit/04d3b87cbc1db020d28c7cfb44fe194558efbdde"><code>04d3b87</code></a> update changelog</li> <li><a href="https://github.com/python-hyper/h2/commit/439b970d0fa19891fa81068907de97dfa3a07c3a"><code>439b970</code></a> prepare for next release cycle</li> <li><a href="https://github.com/python-hyper/h2/commit/9a7ff7430df669fa8e90b6121f3cc1ed64d1115a"><code>9a7ff74</code></a> performance: remove consumed frames in place from data buffer (<a href="https://redirect.github.com/python-hyper/h2/issues/1321">#1321</a>)</li> <li><a href="https://github.com/python-hyper/h2/commit/6cce763997eca5b826f3e435a611b7a7fc73f633"><code>6cce763</code></a> v4.4.0</li> <li><a href="https://github.com/python-hyper/h2/commit/dfafda3b0cd96455b45d1785ef1ebc6968bba5cf"><code>dfafda3</code></a> Bump pytest from 8.4.2 to 9.0.3 (<a href="https://redirect.github.com/python-hyper/h2/issues/1320">#1320</a>)</li> <li><a href="https://github.com/python-hyper/h2/commit/b45207cedf9fabe2c77bb3c1c10f403a610599a0"><code>b45207c</code></a> dependencies and packaging++</li> <li><a href="https://github.com/python-hyper/h2/commit/c40145f69c5473850849fe96301ac0416b1afea6"><code>c40145f</code></a> parse <code>content-length</code> headers according to RFC9110 grammar for numbers (1*DI...</li> <li>Additional commits viewable in <a href="https://github.com/python-hyper/h2/compare/v4.3.0...v4.4.1">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`. [//]: # (dependabot-automerge-start) [//]: # (dependabot-automerge-end) --- <details> <summary>Dependabot commands and options</summary> <br /> You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) You can disable automated security fix PRs for this repo from the [Security Alerts page](https://github.com/langchain-ai/deepagents/network/alerts). </details> Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: Mason Daugherty <mason@langchain.dev>
Examples
Real agents and patterns built on Deep Agents.
Featured
Deep Agents CodeA pre-built coding Deep Agent in your terminal — similar to Claude Code or Codex — powered by any LLM. Includes an interactive TUI, web search, remote sandboxes, persistent memory, custom skills, and human-in-the-loop approval. |
Open SWEAn open-source, async coding agent for your org's internal workflows. Runs each task in an isolated cloud sandbox, integrates with Slack, Linear, and GitHub, and ships PRs end-to-end. |
In the wild
Production agents powered by the LangChain stack:
| Project | Description |
|---|---|
| LangSmith Fleet | No-code platform for building AI agents from templates; connect your accounts and let the agent handle routine work |
| Chat LangChain | Documentation assistant that answers questions about LangChain, LangGraph, and LangSmith (source) |
All examples
Research
| Example | Description |
|---|---|
| Deep Research | Multi-step web research with Tavily, parallel sub-agents, and strategic reflection |
| MCP Docs Agent | Docs research agent using MCP tools over LangChain documentation |
Coding
| Example | Description |
|---|---|
| Coding Agent | Autonomous coding agent in a LangSmith sandbox |
| Nemotron Research Agent | NVIDIA Nemotron Super for research + GPU-accelerated execution via RAPIDS |
Content
| Example | Description |
|---|---|
| Content Builder | Blog posts, LinkedIn posts, and tweets with memory (AGENTS.md), skills, and subagents |
| Text-to-SQL | Natural language to SQL with planning and skill-based workflows on the Chinook demo database |
| LLM Wiki | Script-first LLM wiki synced via langsmith hub init/pull/push |
Deployable services
| Example | Description |
|---|---|
| Content Writer | Content writer with per-user memory and Supabase auth |
| GTM Strategist | GTM strategy agent coordinating sync and async subagents |
| Async Subagent Server | Self-hosted Agent Protocol server exposing a researcher as an async subagent |
Advanced patterns
| Example | Description |
|---|---|
| Ralph Loop | Autonomous looping with fresh context each iteration, using the filesystem for persistence |
| Agents as Folders | Download a zip, unzip, and run |
| Better Harness | Eval-driven outer-loop optimization of a Deep Agents harness |
Each example has its own README with setup instructions.
Contributing an example
See the Contributing Guide for general contribution guidelines.
When adding a new example:
- Use uv for dependency management with a
pyproject.tomlanduv.lock(commit the lock file) - Pin to deepagents version — use a version range (e.g.,
>=0.3.5,<0.4.0) in dependencies - Include a
READMEwith clear setup and usage instructions - Add tests for reusable utilities or non-trivial helper logic
- Keep it focused — each example should demonstrate one use-case or workflow
- Follow the structure of existing examples (see
deep_research/ortext-to-sql-agent/as references)
Resources
- LangChain Academy — Comprehensive, free courses on LangChain libraries and products, made by the LangChain team.
- Code of Conduct — community guidelines and standards