langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- langchain-typesafe: ClassifierResponse has no request id or cost when the classifier is routed through OpenRouter
- core: Tee leaves its source open when a child is never started
- langchain.mcp: support bounded same-call 401 recovery with externally managed credentials
- ExperimentalMarkdownSyntaxTextSplitter closes code blocks on shorter or mismatched fences
- Two type contracts allow values that the implementations cannot handle or do not return as declared.
- XMLOutputParser streaming drops valid Unicode root tags
- chore(langchain): model router review edits
- feat(langchain): add configurable model routing middleware
- feat(langchain): add criteria-based model routing middleware
- ChatPerplexity.stream() crashes with TypeError
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- Python not yet supported