langgraph
https://github.com/langchain-ai/langgraph
Python
Build resilient language agents as graphs.
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- Issues
- langgraph-checkpoint-sqlite: delete_thread() and SqliteStore.delete() leave the deleted text and embeddings in the database files
- A subgraph compiled with `checkpointer=True` returns its previous run's output when it is called again right after a static breakpoint
- JsonPlusSerializer drops pydantic v2 fields declared with an alias on checkpoint round trip
- Command(update=...) on a new thread applies the update twice
- `get_state()` does not report an interrupt raised inside a node's `error_handler`
- Server composes the custom-auth store filter with the client filter as a top-level `$and` no backend supports — search silently empty (InMemory/Postgres) or raises (SQLite); with a preset `$and`-valued field it returns rows that fail the auth condition
- SqliteStore and AsyncSqliteStore reset created_at when updating an existing item
- ToolNode error handlers with postponed union annotations raise AttributeError
- 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
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- Python not yet supported