langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- langchain-typesafe: ModelRouterMiddleware overrides ModelFallbackMiddleware fallback models
- LLMToolSelectorMiddleware ignores conversation history on follow-up queries
- PIIMiddleware inspects only the newest message of each kind, so PII in supplied history reaches the model and block does not raise
- langchain-typesafe: TypeSafeClassifier sends requests when questions is empty
- core: Responses file-URL test overwrites its expected result without asserting it
- `ToolRetryMiddleware`: default settings retry non-idempotent tools on ambiguous transport errors, then ask the model to retry again
- Cache writes are counted twice for priority and flex
- anthropic: `FilesystemClaudeTextEditorMiddleware` reads and writes files with the locale encoding so non ascii content breaks on non utf8 systems
- pyproject.toml is read with the locale encoding in unit tests — full inventory (4 call sites, one missed by #40588, one latent)
- langchain-typesafe: ModelRouterMiddleware raises an opaque RuntimeError when state has no human message
- Docs
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