LangGraph version 1.15.7a1 addresses several critical bugs, including fixing registry skills resolution through the runtime's CrewAI+ client and recovering from GPT-5.6 tools and reasoning_effort 400 errors.

  • Make tool calling work on the Responses API path.
  • Route responses-only models to prevent 404 errors.
  • Bump bedrock-agentcore dependency to patch CVE-2026-16796.
  • Emit skill usage events at runtime for improved observability.

These updates ensure stability with specific model APIs and enhance security by addressing a known vulnerability in dependencies.