LangChain Agent Skills

LangChain Agent Skills (by Lubu Labs) is a community-maintained collection of agent-optimized skills for AI coding assistants working with LangChain, LangGraph, and LangSmith. It ships 10 skill packages (9 production skills plus a skill-creator for authoring your own), covering patterns like LangGraph agent architectures and LangSmith production deployment guidance. It installs into Cursor as remote or local rules, ships a Claude Code marketplace manifest, and works with any assistant by pointing it at the SKILL.md files directly. The repo includes a PLAN.md roadmap, AGENTS.md development guidelines, and validation scripts for skill structure.

The honest picture: this is a third-party community repo, not affiliated with LangChain itself — quality and maintenance depend on community contributors, so verify individual skills before relying on them in production. Last activity should be checked at install time. It overlaps with the official langchain-ai/langchain-skills repo; compare both and pick the one that matches your stack.

Cursor: Settings → Rules → Add Remote Rule with the repo URL, or git clone into .cursor/skills/. Others: point your agent at skills/<name>/SKILL.md.