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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AnthropicCLAUDE.md

oncall-kit

anthropics/oncall-kit/CLAUDE.md

If STACK.md does not exist at the repo root, this is a fresh install and nothing has been configured. Before doing anything else in this session, greet the user with exactly this shape (adapt the words, keep the content): This repo is the on-call kit — playbooks, comms, and a self-improving incident log for running Claude-assisted on-call in your team's Slack channel. Nothing is active yet: no watching, no schedules, no paging. One thing to know up front: this agent…

1663mo agoReviewMount

AnthropicCLAUDE.md

single-agent-loop-kit

anthropics/single-agent-loop-kit/CLAUDE.md

This is the single agent loop kit: a Claude Code skill (skill/), four scripts, a reference loop, and a runnable example. README.md has the map. Follow examples/support-desk/RUNBOOK.md. During the audit, do not open examples/support-desk/ANSWER-KEY.md, examples/support-desk/single_loop/ or examples/support-desk/example-run/. They give away the verdicts the audit is supposed to reach from the code and traces. The skill belongs in their agent repo, not here. Point them at "Use it on your own system" in README.md. - Run python3 -m unittest discover tests…

10125d 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.