codebase-map

Map unfamiliar codebases to locate entry points, data flows, and module boundaries.

Updated Aug 23, 2026
One-click install
npx skills add https://github.com/silvio-l/copilot-skills --skill codebase-map-silvio-l
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: codebase-map
Source: https://github.com/silvio-l/copilot-skills/tree/main/codebase-map
Command: npx skills add https://github.com/silvio-l/copilot-skills --skill codebase-map-silvio-l

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Helps engineers and reviewers quickly understand the structure and navigation of an unfamiliar codebase so they can locate entry points, assess impact, and plan changes with confidence. It reduces time wasted exploring irrelevant files and lowers the risk of overlooking critical boundaries or data flows.

Core Features & Use Cases

  • Entry Point Discovery: Identify UI, CLI, API, event handlers, schedulers, and background jobs that bootstrap behavior.
  • Data & Control Flow Tracing: Trace call chains, data transformations, and state transitions to find where behavior originates and propagates.
  • Module Categorization & Boundary Detection: Classify files as directly relevant, potentially relevant, or likely irrelevant and surface layer/adapter boundaries.
  • Use Case: When debugging a user authentication bug, use the map to quickly find authentication entry points, related modules, and the minimal set of files to inspect or modify.

Quick Start

Map the codebase to identify the primary entry points, the key modules handling the relevant feature, and the likely impact surface for the requested change.

Frequently Asked Questions about codebase-map

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

FAQPage Schema
How do I map an unfamiliar codebase to find entry points and data flows?

To map an unfamiliar codebase, identify UI, CLI, API, and event handler entry points, then trace call chains and data transformations to locate where behavior originates and propagates. This produces a concise architecture summary highlighting relevant files and boundaries.

What is the best way to locate module boundaries for a refactoring task?

Locating module boundaries for refactoring involves classifying files as directly relevant, potentially relevant, or likely irrelevant, and surfacing layer or adapter boundaries. This categorization reduces time spent exploring irrelevant files and lowers the risk of overlooking critical dependencies.

How do I trace data and control flows when debugging a monolith or microservice?

Tracing data and control flows when debugging requires following call chains, data transformations, and state transitions across monoliths and microservices. This identifies the minimal set of files to inspect or modify, ensuring you find where behavior originates and propagates.

Can I use codebase mapping to assess impact before planning feature implementation?

Yes, you can use codebase mapping to assess impact and plan feature implementation with confidence. By identifying entry points and categorizing module relevance, you can quickly locate the key modules handling the relevant feature and define the likely impact surface for the requested change.

What is included in a codebase architecture summary?

A codebase architecture summary highlights relevant files, data and control flows, module boundaries, categorized relevance, and open uncertainties. It provides a concise navigation overview that helps engineers quickly understand the structure of unfamiliar codebases for debugging or architecture reviews.