langgraph-prebuilt==1.1.1
This release updates langgraph-prebuilt to version 1.1.1 and includes core library updates for langgraph (1.2.15), checkpoint-postgres (3.2.0), and checkpoint-sqlite (3.1.2). It specifically addresses a bug where ToolNode incorrectly suppressed invalid resume values and improves the ordering logic for delta channel replays.
Verified State Diff
Impact & Verification Analysis
Developers building stateful, multi-agent systems using LangGraph with Postgres or SQLite persistence layers.
These changes improve the reliability of state persistence and debugging, which are critical for production-grade agentic applications that require high fault tolerance and predictable state recovery.
Full Fact Overview
The release consolidates several dependency updates across the LangGraph ecosystem, focusing on stability and state management. The fix for ToolNode (PR #9232) ensures that invalid resume values are no longer swallowed, which improves error visibility and debugging for developers handling human-in-the-loop or interrupted workflows. Additionally, the update to checkpoint-postgres (3.2.0) and the fix for delta channel replay ordering (PR #8544) suggest a focus on ensuring consistent state recovery and deterministic execution paths in complex, multi-step agentic workflows.