## langchain-ai/langchain — v0.1.15…v0.1.16

_37 commits._

### Features
- **chroma: add required fastapi dep to restrict to <1 (#20297)** (16f8fff)
- **chroma: add optional fastapi dep to restrict to <1 (#20295)** (991fd82)
- **chroma: Add chroma partner package (#19292)** (f8a54d1)
- **core[minor], ...: add tool calls message (#18947)** (9514bc4)

### Fixes
- **langchain[patch]: Release 0.1.16 (#20335)** (6608089)
- **core[patch]: Release 0.1.42 (#20332)** (e72330a)
- **mistral[patch]: add IDs to tool calls (#20299)** (795c728)
- **community[patch]: Add deprecation warnings to postgres implementation (#20222)** (22fd844)
- **core[patch]: For now remove user warning (#20321)** (f02f708)
- **openai[patch]: use tool_calls in request (#20272)** (c706689)
- **langchain[patch]: agents check prompt partial vars (#20303)** (e936fba)
- **core[patch]: fix ChatGeneration.text with content blocks (#20294)** (cb25fa0)
- **core[patch]: include tool_calls in ai msg chunk serialization (#20291)** (03b247c)
- **core[patch]: fix duplicated kwargs in `_load_sql_databse_chain` (#19908)** (eef1995)
- **community[patch]: import flattening fix  (#20110)** (4cb5f4c)
- **openai[patch]: Fix langchain-openai unknown parameter error with gpt-4-turbo (#20271)** (12190ad)
- **mistralai[patch]: Pre-release 0.1.2-rc.1 (#20251)** (0d0458d)
- **anthropic[patch]: Pre-release 0.1.8-rc.1 (#20250)** (e404693)
- **openai[patch]: pre-release 0.1.3-rc.1 (#20249)** (a8eb0f5)
- **core[patch]: Pre-release 0.1.42-rc.1 (#20248)** (a43b9e4)
- **experimental[patch]: Release 0.0.57 (#20243)** (2d83505)
- **groq[patch]: Release 0.1.1 (#20242)** (f06cb59)
- **openai[patch]: Release 0.1.2 (#20241)** (0b2f030)

### Backend
- **release anthropic, fireworks, openai, groq, mistral (#20333)** (799714c)
- **chroma: bump rc, keep optional (#20298)** (0fa551c)
- **core: mustache prompt templates (#19980)** (15271ac)
- **update agents to use tool call messages (#20074)** (21c1ce0)
- **infra, multiple: rc release versions (#20252)** (9eb6f53)
- **groq: xfail tool_choice tests (#20247)** (0055291)

### Docs
- **docs: update chat openai (#20331)** (562b546)
- **docs: add tool-calling agent (#20328)** (2c4741b)
- **docs: add component page for tool calls (#20282)** (f02e55a)
- **docs: Update list of chat models tool calling providers (#20330)** (0e74fb4)
- **docs: Update documentation for custom LLMs (#19972)** (653489a)
- **docs: added backtick on RunnablePassthrough (#20310)** (f709ab4)
- **docs: update tool calling cookbook (#20290)** (39471a9)
- **docs: fix external repo partner docs (#20238)** (ad3f1a9)

_Recap by [Repo Wrapped](https://repowrapped.com/gh/langchain-ai/langchain?utm_source=github-action)._