> **langchain-fundamentals** — chapter 9 of 22 in [langchain-ai/langchain-skills](https://skillsdocs.com/langchain-ai/langchain-skills).
>
> Book (all chapters, one file): https://skillsdocs.com/langchain-ai/langchain-skills.md
> Machine manifest: https://skillsdocs.com/langchain-ai/langchain-skills/.well-known/agent-skills/index.json
> Install the book: `npx skills add langchain-ai/langchain-skills`
> Upstream: https://github.com/langchain-ai/langchain-skills/blob/main/config/skills/langchain-fundamentals/SKILL.md @ `main`
> Raw bytes, no header: https://raw.githubusercontent.com/langchain-ai/langchain-skills/main/config/skills/langchain-fundamentals/SKILL.md
> Base for relative paths: https://raw.githubusercontent.com/langchain-ai/langchain-skills/main/config/skills/langchain-fundamentals/
> Licence: No licence detected — all rights reserved by its authors
>
> Content © its authors. This chapter's body is not served here; the links above are. Takedown: https://github.com/kyleledbetter/skillsdocs/issues/new?labels=takedown&title=Takedown+request

# langchain-fundamentals

Create LangChain agents with create_agent, define tools, and use middleware for human-in-the-loop and error handling.

No licence could be detected for this skill at either the repository or the skill level, so its body is not reproduced here. Read it upstream:

https://raw.githubusercontent.com/langchain-ai/langchain-skills/main/config/skills/langchain-fundamentals/SKILL.md