langgraph==1.2.13
LangGraph version 1.2.13 addresses multiple bug fixes related to DeltaChannel operations, state checkpointing/branching, and interrupt reporting, alongside dependency updates.
Why this signal matters
LangGraph 1.2.13 introduces several fixes primarily targeting checkpoint management and DeltaChannel behavior. Notable bug fixes include: forking before replaying an update checkpoint after a thread has moved past it, isolating state updates on older checkpoints from other branches, maintaining DeltaChannel counters across all update state paths, avoiding history traversal for unwritten DeltaChannels, preventing abandoned branch replays into DeltaChannel forks, hydrating subgraph delta channels with caller-resolved savers, and omitting answered interrupts in state retrieval. Several development and runtime dependencies were also updated.
Actionable summary
LangGraph v1.2.13 fixes state update isolation on older checkpoints, prevents abandoned branch replay into DeltaChannel forks, maintains DeltaChannel counters across all update paths, fixes subgraph delta channel hydration, and stops reporting answered interrupts in get state.
- Agent usefulness
- 77/100
- Confidence
- 96%
- Canonical data
- JSON + Markdown
What builders should check
- Upgrade langgraph to version 1.2.13.
- Verify state checkpointing, branching logic, and interrupt resolution handling in existing workflows.