skills.rest
njt
njtCOMMUNITY
Explore all skills by this author →
WebsiteGitHub

reverse-engineering-requirements

Extract structured requirements from source code via iterative subagent review.

11|Updated Feb 8, 2026
Search Tags:#code analysis#documentation#requirements#reverse engineering#legacy systems#subagent review
One-click install
npx skills add https://github.com/njt/reqskill --skill reverse-engineering-requirements
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: reverse-engineering-requirements
Source: https://github.com/njt/reqskill/tree/main/skills/reverse-engineering-requirements
Command: npx skills add https://github.com/njt/reqskill --skill reverse-engineering-requirements

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) and assets (resource) components.

What problem does it solve?

This Skill helps you understand and document the requirements of an existing software system by analyzing its source code, especially when original documentation is missing or outdated.

Core Features & Use Cases

  • Code-to-Requirements Extraction: Analyzes source code to identify and document system functionalities.
  • Iterative Subagent Review: Uses AI subagents to repeatedly review code against evolving requirements, catching omissions and inaccuracies.
  • Use Case: You've inherited a legacy Python application with no documentation. Use this Skill to generate a requirements.md file that accurately describes what the application does, based solely on its codebase.

Quick Start

Use the reverse-engineering-requirements skill to extract requirements from the provided source code files.

Frequently Asked Questions about reverse-engineering-requirements

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

FAQPage Schema
How do I extract requirements from source code for an undocumented legacy system?▼

You can extract requirements from source code by applying iterative subagent review to analyze the codebase, differentiating core system functionalities from implementation details and non-goals to generate a structured requirements document.

What is the best way to document legacy system functionalities when original documentation is missing?▼

Documenting missing legacy system functionalities is best achieved by using AI subagents to repeatedly review source code against an evolving requirements baseline, catching omissions and accurately mapping out what the application actually does.

Can I use code analysis to differentiate true requirements from implementation decisions?▼

Yes, code analysis can differentiate true requirements from implementation decisions by evaluating source code specifically to isolate essential system behaviors from how they were technically implemented and past non-goals.

Does reverse engineering requirements work for migrating a legacy tech stack to a new framework?▼

Reverse engineering requirements works for tech stack migrations by analyzing existing source code to produce a clean baseline of system functionalities, allowing you to re-implement the system accurately in a new framework.

How do I generate a requirements.md file directly from an existing codebase?▼

To generate a requirements.md file from an existing codebase, feed the source code into this Skill, which iteratively reviews the code to extract and document structured system functionalities into a markdown format.

What are the limitations of using AI to reverse engineer requirements from code?▼

Limitations of using AI to reverse engineer requirements include the challenge of accurately distinguishing between intentional business rules and arbitrary implementation details deeply embedded within complex legacy source code.

Related Skills

Explore More Software Engineering Skills→
kubiyabotkubiyabot
16

aws-skill

Manage AWS S3, EC2, and Lambda resources from the terminal.

Official
Advanced
Marcu-LoretoMarcu-Loreto

reversa-paradigm-advisor

Detect paradigm mismatches and generate a decision document for system migration.

Community
Advanced
yun-s-ohyun-s-oh

openspec-verify-change

Verify code implementation against change artifacts using command-line tools.

Community
Advanced
mvallimmvallim
7

generate-markdown-docs

Generate Markdown documentation from codebases with customizable headings and dependencies.

Community
Intermediate