What langchain-ai/langchain shipped
Written by FoxPlug from public releases; not affiliated with LangChain. An automatic summary of the public release, pull request and commit data of github.com/langchain-ai/langchain. LangChain did not write it and does not use or endorse FoxPlug. Every line links to the public change it describes.
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Week of September 21, 2026
What shipped
- AWS Bedrock Mantle chat models are now accessible through
init_chat_model. Pull request #40837 create_agentnow repairs invalid tool calls with errorToolMessageentries to prevent provider replay failures. Pull request #40530AzureChatOpenAIusers on AKS can now automatically use workload identity without manual credential injection. Pull request #40532ChatFireworksnow replays historical tool calls with malformed arguments as diagnostic JSON instead of forwarding invalid strings. Pull request #40818- Long tool IDs in XML-formatted conversation strings are now abbreviated to first 32 characters to reduce token usage. Pull request #40792
- Documentation in
AGENTS.mdand package docs have been corrected for accuracy with repository structure. Pull request #40791
Changelog entry
- Bedrock Mantle chat models now supported in
init_chat_modelPull request #40837 create_agentrepairs invalid tool calls with errorToolMessageentries Pull request #40530- AzureChatOpenAI supports workload identity on AKS without manual configuration Pull request #40532
- Fireworks: malformed tool arguments preserved as diagnostic JSON Pull request #40818
- Long tool IDs abbreviated in XML conversation strings Pull request #40792
- Documentation accuracy improvements in AGENTS.md and package docs Pull request #40791
- langchain-fireworks released 1.6.3 Release
- langchain-core released 1.6.5 Release
- langchain-openrouter released 0.2.9 Release