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python LangGraph Releases · · 1.2.6

LangGraph 1.2.6 fixes nested subgraph checkpointing and streaming

sdkaiinfraengineerpython-agentic
patch

LangGraph version 1.2.6 addresses two critical regressions, restoring correct checkpointing for nested subgraphs and ensuring running subgraphs are canceled when streaming aborts. These fixes are important for stable and predictable execution of complex graph workflows. The update targets developers using LangGraph for multi-step agentic processes or complex state machines.

  • →Fix nested subgraph checkpoint inheritance
  • →Cancel running subgraphs on stream abort
  • →Standardize package README structure
  • →Update Tornado dependency
Fixes (2) ›
  • Fix nested subgraph checkpoint inheritance

    Restores correct checkpoint namespace inheritance for nested subgraphs, fixing a regression introduced in version 1.2.3.

  • Cancel running subgraphs on stream abort

    Ensures that any currently running subgraphs are properly canceled when a streaming operation is aborted, resolving an issue where subgraphs might continue to run unexpectedly.

Maintenance (2) ›
  • Standardize package README structure

    The documentation for packages has been updated to use a standardized README file structure.

  • Update Tornado dependency

    The Tornado dependency within the langgraph library has been updated from version 6.5.5 to 6.5.6.

Read the original announcement →

https://github.com/langchain-ai/langgraph/releases/tag/1.2.6

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