langgraph
https://github.com/langchain-ai/langgraph
Python
Build resilient language agents as graphs.
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- Issues
- fix(langgraph): apply a resumed Command's update once
- add_messages skips merging, deletion and format= for messages after RemoveMessage(id=REMOVE_ALL_MESSAGES)
- add_conditional_edges ignores the Literal return hint of a callable-class router, so the graph drawing loses the branch edges
- create_react_agent formats the whole state into an unused error message on every model call
- StateGraph ignores reducers wrapped in ReadOnly TypedDict qualifiers
- fix(langgraph): save a resumed exit run's pending writes once
- fix(sdk-py): surface thread stream errors and stop retrying a rejected stream
- fix(langgraph): stop a subgraph from rerunning its finished tasks on resume
- Conditional router returning a non-`path_map` value raises a bare `KeyError` with no context
- get_input_jsonschema() fails on the declared pydantic floor (>=2.7.4) for TypedDict states using Annotated[Required[...]] / Annotated[NotRequired[...]]; works from pydantic 2.11
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