langchain
https://github.com/langchain-ai/langchain
Python
⚡ Building applications with LLMs through composability ⚡
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- Issues
- Public API for safe message retention cutoff
- Responses API with streaming and a nested Pydantic schema results in invalid strict JSON schema (additionalProperties/required missing on $defs)
- init_chat_model fails to infer `openai` provider for `o4` models (e.g. o4-mini)
- count_tokens_approximately over-counts audio/video/file blocks by char-counting their base64 payload
- Silent quality degradation in multi-agent flat round-table: 34.3/100 without synthesis node vs 86.3/100 with it
- VectorStore.add_texts silently truncates texts when len(ids) < len(texts)
- merge_message_runs is O(n^2) in run length for list/content-block messages
- OpenSearchVectorSearch should support custom index settings during index creation
- fix(core)!: include multimodal blocks in `get_buffer_string` prefix format
- feat(langchain-core): forward document metadata to embedding implementations to enable multimodal providers
- Docs
- Python not yet supported