Pull Requests langchain-ai/langchain

fix(langchain): guard file search regex fallback langchain fix external

#34752 opened 2026-01-14 15:01 by T1mn

fix(openai): handle missing 'role' key in reasoning payload (#34748) integration fix openai external

#34750 opened 2026-01-14 11:59 by Aryan-31

feat(langchain): Only Keeping the last todo message langchain feature external

#34742 opened 2026-01-13 21:41 by keenborder786

fix(core): update `on_llm_new_token` type core fix langchain-classic internal

#34739 opened 2026-01-13 15:49 by mdrxy

fix(core): preserve index and timestamp fields when merging core fix internal

#34731 opened 2026-01-12 23:24 by mdrxy

fix(perplexity): ensure metadata appears in streaming output integration fix perplexity external

#34730 opened 2026-01-12 22:28 by idfedorov09

fix(langchain-classic): harden RAG prompts against indirect prompt injection fix langchain-classic external

#34715 opened 2026-01-12 18:53 by skyvanguard

feat(huggingface): add structured output support for Pydantic models integration feature huggingface external

#34708 opened 2026-01-12 06:19 by biplavbarua

feat(standard-tests): add streaming tool call tests for chat models integration core standard-tests feature model-profiles anthropic openai internal

#34707 opened 2026-01-12 04:58 by mdrxy

fix(langchain): allow duplicate middleware names by keeping last instance langchain fix external

#34699 opened 2026-01-11 15:00 by mohankumar27

fix(chroma): forward `filter`/`where_document` in `_similarity_search_with_relevance_scores` integration fix chroma external

#34694 opened 2026-01-10 01:20 by devffex

feat(core): add `StreamEventName` `Literal` type for type-safe event handling core feature external

#34676 opened 2026-01-09 14:17 by donggyun112

fix(core): format content blocks in `pretty_repr` core fix external

#34673 opened 2026-01-09 06:18 by T1mn

fix(core): merge `tool_call_chunks` without index in streaming core fix external

#34671 opened 2026-01-08 22:23 by 686f6c61

feat(ollama): embeddings output dimensionality parameter integration core langchain feature langchain-classic ollama external

#34627 opened 2026-01-07 10:40 by jasiecky

fix(ollama): support `response_format` in `ChatOllama` integration fix ollama external

#34612 opened 2026-01-06 06:52 by mohankumar27

refactor(core): eagerly validate `trim_messages` arguments core refactor external

#34585 opened 2026-01-02 16:54 by Aman071106

chore(langchain): improve typing of agent decorators langchain infra typing external

#34584 opened 2026-01-02 13:32 by cbornet

feat(langchain): port AND-capable trigger conditions to `SummarizationMiddleware` langchain feature external

#34576 opened 2026-01-02 06:18 by Davda-James

fix(core): inject additional kwargs into `BaseTool` `_run` and `_arun` core fix external

#34561 opened 2026-01-01 10:13 by Ryanakml

fix(core): add tracing callbacks to `RouterRunnable` core fix external

#34554 opened 2025-12-31 16:34 by yashwanthjack

chore(core): fix some `any` generics core infra text-splitters typing external

#34545 opened 2025-12-30 19:13 by cbornet

refactor(core): remove redundant ainvoke in `StructuredTool` core refactor external

#34538 opened 2025-12-30 11:13 by Aman071106

refactor(core): use `get_type_hints` for annotation preservation core refactor typing external

#34537 opened 2025-12-30 10:29 by Aman071106

fix(core): ensure tool callbacks fire when tools run inside `Runnable` core fix external

#34536 opened 2025-12-30 01:05 by Vishal-Krishna-Kumar

chore(core): improve typing of Runnable `__or__` core infra langchain-classic typing external

#34530 opened 2025-12-29 18:11 by cbornet

feat(core): add approximate image token counting support core feature external

#34529 opened 2025-12-29 18:06 by Aman071106

feat(core): eager validation for `trim_messages` configuration core feature external

#34528 opened 2025-12-29 17:34 by Aman071106

chore(core): fix some TC rules (do not merge) core infra dependencies typing external

#34520 opened 2025-12-29 09:49 by cbornet

fix(deepseek): preserve `reasoning_content` in multi-turn conversations integration fix deepseek external

#34516 opened 2025-12-28 19:30 by yurekami