Codebase Onboarding

Runs reconnaissance on an unfamiliar codebase without reading every file, maps the architecture, detects conventions from git history and code patterns, then generates both a scannable onboarding guide and a starter CLAUDE.md tailored to what it found. Use it when you first open a project with Claude Code or join a new repo. The four phase approach (reconnaissance, architecture mapping, convention detection, artifact generation) keeps it from hallucinating about structure. The best part is how it handles existing CLAUDE.md files by enhancing rather than replacing them, and it explicitly flags unknowns instead of guessing. Stays under 100 lines and focuses on what shapes how you write code, not listing every dependency.

Install to Claude Code

npx -y skills add affaan-m/ecc --skill codebase-onboarding --agent claude-code