langgraph
https://github.com/langchain-ai/langgraph
Python
Build resilient language agents as graphs.
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- Issues
- perf(checkpoint): _msgpack_default walks an O(N) isinstance ladder on every value
- perf(langgraph): _get_channels calls get_type_hints on every StateGraph.compile() (cold-start tax)
- bug: lost exception chain in _get_node_name
- bug: except BaseException should be except Exception in cleanup paths
- Proposal: production HITL patterns example notebook
- InMemoryStore.search() crashes on $gt/$gte/$lt/$lte when an item is missing the filtered key or has a non-numeric value
- AsyncSqliteSaver.put() and put_writes() deadlock instead of raising when called synchronously from within the event loop
- Thread copy endpoint can take 12+ minutes with no async/progress or shallow-copy option
- [security] CLI: `templates._download_repo_with_requests` extracts ZIP archives without per-entry path validation (CWE-22 / Zip Slip)
- langgraph_sdk: `HttpClient.request_reconnect` reuses `Content-Length`/`Content-Type` on body-less GET retry, causing `h11.LocalProtocolError`
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- Python not yet supported