CLAUDE.md examples from real projects

How real projects brief Claude Code: the commands, conventions and warnings they put in CLAUDE.md.

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kieranklaassen

kieranklaassenCLAUDE.md

ruby_llm-skills

kieranklaassen/ruby_llm-skills/CLAUDE.md

RubyLLM::Skills is a Ruby gem that implements the Agent Skills specification for RubyLLM. It enables progressive disclosure of AI capabilities through a three-level pattern: metadata (~100 tokens), full instructions (SKILL.md), and on-demand resources (scripts, references, assets). The gem uses the RubyLLM::Skills namespace (matches the parent ruby_llm gem): Progressive Disclosure: Skills load in three stages to minimize context usage: 1. Metadata (name + description) - loaded at startup, injected into system prompt 2. Full instructions (SKILL.md) - loaded when LLM determines…

3810mo agoReviewMount

CLAUDE.md vs AGENTS.md

About CLAUDE.md

What is CLAUDE.md?

A file Claude Code reads at the start of every session. It holds the commands, conventions and warnings the agent needs for this project.

Where does it go?

At the repository root. Claude Code also reads CLAUDE.md files in subdirectories when it works there.

What should it contain?

Build and test commands, the project's layout, conventions that aren't obvious from the code, and mistakes to avoid. Short files tend to work better than long ones.

CLAUDE.md or AGENTS.md?

Claude Code reads CLAUDE.md; most other agents read AGENTS.md. Many projects keep one and point the other at it.