langchain-ai/langchain
The agent engineering platform.
View on GitHub →Where this sits in the catalog
Most-wanted open issues
Ranked by 👍 reactions. 536 open issues total, checked 2026-10-16.
| Issue | 👍 | Comments | Opened |
|---|---|---|---|
The batch method from ChatModels and all the Runnables does not really support the OpenAI batch API. help wanted, openai, external | 37 | 17 | 1 yr |
Prompts and Resources auto-discovery documentation, external, mcp | 16 | 7 | 1 yr |
Support dynamic tool addition/removal after agent creation and in middleware langchain, feature request, candidate, external | 16 | 19 | 11 mo |
[Feature Request] Native Support for MCP Code Execution (Programmatic Tool Calling) & Lazy Result Loading great-writeup, core, langchain, feature request, anthropic, openai, external | 15 | 12 | 10 mo |
Expose Deep Agent Harness as Composable LangGraph Primitives langchain, feature request, external | 13 | 12 | 6 mo |
What Hacker News made of it
Threads that link to or name this project, ranked by points. The comments are where the objections live — the README never argues back.
- Why we no longer use LangChain for building our AI agents
480 points · 297 comments · 2 yrs
- LangChain: Build AI apps with LLMs through composability
372 points · 76 comments · 3 yrs
- Re-implementing LangChain in 100 lines of code
252 points · 83 comments · 3 yrs
- Show HNShow HN: Chat with your data using LangChain, Pinecone, and Airbyte
220 points · 59 comments · 3 yrs
- New: LangChain templates – fastest way to build a production-ready LLM app
137 points · 69 comments · 2 yrs
Head to head with its peers
The same six axes and the same star history, two projects at a time.
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