langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- `convert_to_openai_tool` ignores `strict` for dicts already in OpenAI tool format
- Errors OpenRouter reports in a 200 response body are stringified rather than classified
- RemoteGraph returns invoke output as list of dict instead of list of BaseMessage - mandatory when combined with CompiledSubAgent
- `AnthropicPromptCachingMiddleware` silently drops the system prompt when the last content block is a string
- MarkdownHeaderTextSplitter becomes very slow with many paragraphs under the same header
- `HTMLHeaderTextSplitter` raises `ValueError` on init for the non-heading tags its splitter already supports
- core: `parse_json_markdown` fails on a fence tagged `JSON` instead of `json`
- text-splitters: `MarkdownHeaderTextSplitter` keeps the closing `##` sequence in header metadata
- text-splitters: `RecursiveCharacterTextSplitter` skips `strip_whitespace` for pieces it cannot split further
- text-splitters: SpacyTextSplitter ignores max_length with pipeline="sentencizer"
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