Analyze an unfamiliar codebase and generate a structured onboarding guide with architecture map, key entry points, conventions, and a starter CLAUDE.md. Use when joining a new project or setting up Claude Code for the first time in a repo.
Install
npx skills add affaan-m/ECC --skill codebase-onboardingnpx skills add affaan-m/ECC --skill codebase-onboarding -a claude-code -gnpx skills add affaan-m/ECC --skill codebase-onboarding -a codex -ggemini skills install https://github.com/affaan-m/ECC.git --path docs/zh-CN/skills/codebase-onboardinggh skill install affaan-m/ECC codebase-onboardinggit clone --depth 1 https://github.com/affaan-m/ECC /tmp/affaan-m__ECC
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/affaan-m__ECC/docs/zh-CN/skills/codebase-onboarding ~/.claude/skills/codebase-onboarding # Claude Code
cp -R /tmp/affaan-m__ECC/docs/zh-CN/skills/codebase-onboarding ~/.agents/skills/codebase-onboarding # Codex, Cursor, Gemini CLI, Copilot, OpenCode