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Codebase Onboarding

affaan-m/everything-claude-code

When you're dropped into an unfamiliar codebase, this skill runs reconnaissance without reading every file. It fingerprints your framework, maps directory structure, identifies entry points, and traces a request from start to finish. Then it generates two things: a scannable onboarding guide covering architecture and conventions, and a starter CLAUDE.md tailored to your detected stack. If you already have a CLAUDE.md, it enhances rather than replaces it. The four phase approach (reconnaissance, architecture mapping, convention detection, artifact generation) is methodical but fast. Best for that first session in a new repo when you need to get oriented without spending an hour grep-ing around.

skills.sh installs
5.3K
GitHub stars
229.1K
last updated
Jul 14, 2026
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Install

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

Installs into .claude/skills of the current project.

Files

Codebase Onboarding

Systematically analyze an unfamiliar codebase and produce a structured onboarding guide. Designed for developers joining a new project or setting up Claude Code in an existing repo for the first time.

When to Use

  • First time opening a project with Claude Code
  • Joining a new team or repository
  • User asks "help me understand this codebase"
  • User asks to generate a CLAUDE.md for a project
  • User says "onboard me" or "walk me through this repo"

How It Works

Phase 1: Reconnaissance

Gather raw signals about the project without reading every file. Run these checks in parallel:

1. Package manifest detection
   → package.json, go.mod, Cargo.toml, pyproject.toml, pom.xml, build.gradle,
     Gemfile, composer.json, mix.exs, pubspec.yaml

2. Framework fingerprinting
   → next.config.*, nuxt.config.*, angular.json, vite.config.*,
     django settings, flask app factory, fastapi main, rails config

3. Entry point identification
   → main.*, index.*, app.*, server.*, cmd/, src/main/

4. Directory structure snapshot
   → Top 2 levels of the directory tree, ignoring node_modules, vendor,
     .git, dist, build, __pycache__, .next
SKILL.md on GitHub

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Details

Repository
github.com/affaan-m/everything-claude-code
First seen
Apr 16, 2026

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