Codebase Onboarding

For when you're dropped into an unfamiliar codebase and need to get oriented fast. It walks through the repository structure, identifies key architectural patterns, and maps out dependencies so you understand what connects to what. The approach is systematic: start with the project layout, move through the tech stack, then dig into how components interact. Honestly most useful in those first few days on a new team when you're trying to figure out where anything lives. Works best on codebases with some existing structure rather than complete chaos, though it'll give you a baseline either way.

skills.sh installs: 727
GitHub stars: 29.5K
last updated: Aug 21, 2026

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Install

$ npx -y skills add alirezarezvani/claude-skills --skill codebase-onboarding --agent claude-code

Installs into .claude/skills of the current project.

Files

Codebase Onboarding

Tier: POWERFUL
Category: Engineering
Domain: Documentation / Developer Experience

Overview

Analyze a codebase and generate onboarding documentation for engineers, tech leads, and contractors. This skill is optimized for fast fact-gathering and repeatable onboarding outputs.

Core Capabilities

Architecture and stack discovery from repository signals
Key file and config inventory for new contributors
Local setup and common-task guidance generation
Audience-aware documentation framing
Debugging and contribution checklist scaffolding

When to Use

Onboarding a new team member or contractor
Rebuilding stale project docs after large refactors
Preparing internal handoff documentation
Creating a standardized onboarding packet for services

Quick Start

# 1) Gather codebase facts
python3 scripts/codebase_analyzer.py /path/to/repo

# 2) Export machine-readable output
python3 scripts/codebase_analyzer.py /path/to/repo --json

# 3) Use the template to draft onboarding docs
# See references/onboarding-template.md