For me it's very handy to have agent-specific instructions. Each harness does it differently and with differing levels of annoyance: - .cursor/rules - CLAUDE.

For me it's very handy to have agent-specific instructions. Each harness does it differently and with differing levels of annoyance: - .cursor/rules - CLAUDE.md - .github/copilot-instructions.md - .aider.conf.yml - .gemini/settings.json A simple @AGENTS.md at the top of CLAUDE.md makes it play nice.