Codebase Investigation

Analyze software repositories to identify features, architecture, and technical debt.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/rylezhou/arlis --skill codebase-investigation
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: Codebase Investigation
Source: https://github.com/rylezhou/arlis/tree/main/.agent/skills/codebase-investigation
Command: npx skills add https://github.com/rylezhou/arlis --skill codebase-investigation

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) components.

What problem does it solve?

This Skill provides a systematic method to deeply analyze any software repository, revealing its core architecture, identifying high-value features, and pinpointing hidden technical debt.

Core Features & Use Cases

  • High-Level Overview: Quickly assess project health, scale, and recent activity.
  • Effort & Churn Analysis: Pinpoint the most actively developed and potentially problematic areas of the codebase.
  • Key Component Identification: Locate critical elements like routing, data models, authentication, and background job systems.
  • Hidden Pattern Discovery: Uncover testing density, error handling strategies, and outstanding TODO items.
  • Use Case: A new engineer joining a project can use this Skill to rapidly understand the codebase's structure, identify the most critical modules, and prioritize areas for immediate attention or refactoring.

Quick Start

Use the Codebase Investigation skill to analyze the current repository and identify the top 3 most edited files.

Frequently Asked Questions about Codebase Investigation

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I perform a forensic audit on a software codebase to identify technical debt?

To analyze codebase structure and identify technical debt, this Skill performs a forensic audit examining repository structure, commit history, and file churn. It synthesizes a feature rank report highlighting high-value features and architectural patterns.

What is the best way to analyze commit history and file churn to find problematic code areas?

The best way to analyze commit history and file churn is by performing heavy-engineering analysis on software repositories. This identifies actively developed and potentially problematic areas by evaluating codebase structure and file churn rates.

Can I locate critical software architecture elements like routing and data models in an unfamiliar repository?

Yes, you can locate critical software architecture elements by executing key component searches within the repository. This forensic audit identifies routing, data models, authentication, and background job systems to map the core architecture.

How do I uncover hidden software patterns like testing density and outstanding TODO items?

To uncover hidden software patterns like testing density and outstanding TODO items, perform a forensic audit on the software repository. This analysis reveals error handling strategies and hidden technical debt within the codebase structure.

Does codebase investigation require shell command execution capabilities to analyze project health?

Yes, codebase investigation requires shell command execution and file reading capabilities to assess project health. This heavy-engineering analysis evaluates project scale and recent activity by executing scripts directly on the software repository.

When do I need a heavy-engineering analysis of my software repository's structure?

You need a heavy-engineering analysis of your software repository when onboarding new engineers or prioritizing refactoring efforts. It provides a high-level overview of project health, scale, and recent activity to identify high-value features and technical debt.