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[PR #6201] fix(langgraph): CheckpointTask.state can be a StateSnapshot #4900

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opened 2026-02-20 17:50:55 -05:00 by yindo · 0 comments
yindo commented 2026-02-20 17:50:55 -05:00
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Original Pull Request: https://github.com/langchain-ai/langgraph/pull/6201

State: closed
Merged: Yes

This adds StateSnapshot to the union type annotation of CheckpointTask.state.

The annotation was previously incomplete: map_debug_checkpoint() generates CheckpointPayload objects from PregelTask objects, and the state field in PregelTask is of type None | RunnableConfig | StateSnapshot.

**Original Pull Request:** https://github.com/langchain-ai/langgraph/pull/6201 **State:** closed **Merged:** Yes --- This adds `StateSnapshot` to the union type annotation of `CheckpointTask.state`. The annotation was previously incomplete: `map_debug_checkpoint()` generates `CheckpointPayload` objects from `PregelTask` objects, and the `state` field in `PregelTask` is of type `None | RunnableConfig | StateSnapshot`.
yindo added the pull-request label 2026-02-20 17:50:55 -05:00
yindo closed this issue 2026-02-20 17:50:55 -05:00
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Reference: langchain-ai/langgraph#4900
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