Use when creating or updating CLAUDE.md files for projects or subdirectories - covers top-level vs domain-level organization, capturing architectural intent and contracts, and mandatory freshness dates
Install
npx skills add ed3dai/ed3d-plugins --skill writing-claude-md-filesnpx skills add ed3dai/ed3d-plugins --skill writing-claude-md-files -a claude-code -gnpx skills add ed3dai/ed3d-plugins --skill writing-claude-md-files -a codex -ggemini skills install https://github.com/ed3dai/ed3d-plugins.git --path plugins/ed3d-extending-claude/skills/writing-claude-md-filesgh skill install ed3dai/ed3d-plugins writing-claude-md-filesgit clone --depth 1 https://github.com/ed3dai/ed3d-plugins /tmp/ed3dai__ed3d-plugins
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/ed3dai__ed3d-plugins/plugins/ed3d-extending-claude/skills/writing-claude-md-files ~/.claude/skills/writing-claude-md-files # Claude Code
cp -R /tmp/ed3dai__ed3d-plugins/plugins/ed3d-extending-claude/skills/writing-claude-md-files ~/.agents/skills/writing-claude-md-files # Codex, Cursor, Gemini CLI, Copilot, OpenCode