langgraph
https://github.com/langchain-ai/langgraph
Python
Build resilient language agents as graphs.
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- Issues
- update_state on the head of a failed run drops a finished sibling's writes
- checkpoint: AES checkpoints with non-default mac_len cannot be read back
- sdk-py: WebSocket cookie selection drops base URL path prefixes
- sdk-py: async protocol SSE accepts HTML responses as successful empty streams
- cli: deployment archives omit uv workspaces outside the config directory
- checkpoint: Redis cache tests flush unrelated data from local databases
- Agent Server: a custom http.app empties the built-in operations in /openapi.json
- sdk-py: full tool delta buffer raises QueueFull on completion and leaves deltas hanging
- A subgraph node with a `RetryPolicy` asks again after a failed attempt, but the resumed run continues the failed attempt and discards the new answer
- With a `TimeoutPolicy` on a node and `step_timeout` on the graph it runs, resuming after a sibling's failure makes that graph return before its `Send` fan-out ran
- Docs
- Python not yet supported