[ChiragAgg5k]

Upgrades the LangChain stack in one change, replacing #6, #7 and #8. Those PRs can't install on their own because the packages pin each other.

Package	From	To
langchain-core	0.3.72	1.7.6
langchain-openai	0.3.28	1.7.4
langgraph	0.5.4	1.2.20
langchain-mcp-adapters	0.1.9	0.3.2
mcp	1.19.0	1.30.0

mcp has to move as well: with 1.19.0 the install succeeds, but app.main fails on import because the adapters need streamable_http_client. verify wouldn't catch a runtime break like this, as the repo has no tests and only installs dependencies.

Verification

I ran run_turn_stream on Python 3.10 on the old and new pins, against a stub of the OpenAI Responses API. The turn covered routing, a calculator tool call and a streamed answer, and both runs produced the same event stream. All app modules also import.

I connected to a local MCP server over streamable HTTP as well. On the new pins, MCP tools return content blocks instead of a string; _preview and content_to_text turn those into the same text.

Not tested

No real model or Appwrite MCP server was used, so this should be checked on a real turn after deploy, particularly MCP write tools going through write_guard. create_react_agent still works here, so I left it in place.

Related: appwrite-labs/cloud#7351

[appwrite]

🟢 Tier S · Ready to merge

The dependency pins now upgrade LangChain, LangGraph, and the MCP client stack together. This keeps the related packages on compatible major-version lines.

Verdict	New comments	Fixed	Still open
✅ Approved	0	1	0

📂 Walkthrough · 1

File	Change
requirements.txt	Updates the LangChain, LangGraph, MCP, and adapter pins.

✅ Fixed since the last review · 1

• Pinned package releases are not yet published · requirements.txt:5

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_{Reviewed 6eeb01b · Details · Comment @appwrite review to re-run, or mention @appwrite with a question.}

[appwrite]

🟡 Tier B · 1 blocking finding to address. Summary

[ChiragAgg5k]

@appwrite review

The findings that requested changes are resolved. See the summary comment for what is still open.

[appwrite]

🟢 Tier S · Looks good to merge. Summary