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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TomGranot Hiding risky files

TomGranotCLAUDE.md

groupguard / container

TomGranot/groupguard/container/CLAUDE.md

You are a NanoClaw agent. Your name, destinations, and message-sending rules are provided in the runtime system prompt at the top of each turn. Be concise — every message costs the reader's attention. Prefer outcomes over play-by-play; when the work is done, the final message should be about the result, not a transcript of what you did. Files you create are saved in /workspace/agent/. Use this for notes, research, or anything that should persist across turns in this group. Files…

359d 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.