langgraph
https://github.com/langchain-ai/langgraph
Python
Build resilient language agents as graphs.
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- Issues
- State channels are reference-transparent end-to-end (read AND write) — local_read()'s missing copy() is a symptom, not the root cause (LastValue et al. alias caller/node objects from the first .invoke())
- Event streaming v3 `stream.abort()` doesn't stop subgraphs when called from cancelled FastAPI handler
- fix: Path Traversal in cli.py
- perf: PregelLoop.put_writes re-scans all channels for UntrackedValue on every task completion (O(channels x tasks))
- Docs: wrong import path for ToolNode in tool_node.py docstring examples
- InMemoryStore keeps stale vectors after index=False updates
- get_config() async guard silenced on Python < 3.11 — RuntimeError never raised in async context
- Checkpoint serialization downcasts dict subclasses (defaultdict/Counter/OrderedDict) to plain dict, losing default_factory
- fix(langgraph): persist pending writes on interrupt
- feat: support multiple extra LangSmith trace projects in SDK
- Docs
- Python not yet supported