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codebase-design

Design deep modules with small interfaces and large implementations.

Updated Jun 20, 2026
Search Tags:#code structure#module design#testing strategies#deep module#seam management
One-click install
npx skills add https://github.com/samuel-morrissey/skills --skill codebase-design-samuel-morrissey
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: codebase-design
Source: https://github.com/samuel-morrissey/skills/tree/main/skills/codebase-design
Command: npx skills add https://github.com/samuel-morrissey/skills --skill codebase-design-samuel-morrissey

SYSTEM DOCUMENTATION & REQUIREMENTS

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

What problem does it solve?

This Skill provides a framework for designing deep modules, which are modules with a small interface and a large implementation, enhancing code structure, maintainability, and testability.

Core Features & Use Cases

  • Deep Module Design: Offers guidelines for creating deep modules with a small interface and a large implementation.
  • Seam Management: Helps in determining the best location for seams in a module's interface.
  • Testing Strategies: Provides strategies for testing deep modules, including replacing old unit tests and writing new tests at the module's interface.

Quick Start

Use the codebase-design skill to design a deep module for your project, ensuring it has a small interface and a large implementation.

Frequently Asked Questions about codebase-design

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

FAQPage Schema
What is a deep module in software design?▼

A deep module is a software design pattern featuring a small interface and a large implementation, which hides complexity to improve code structure, maintainability, and testability.

How do I design a deep module for better code maintainability?▼

To design a deep module, create a small interface that hides a large implementation, use seam management guidelines to determine interface boundaries, and write tests directly at the module interface.

What is seam management and how does it relate to module design?▼

Seam management determines the optimal location for seams within a module's interface, allowing you to isolate complexity and swap implementations without affecting the rest of the codebase.

What testing strategies work best for deep modules?▼

The best testing strategy for deep modules involves replacing old internal unit tests and writing new tests exclusively at the module's interface to validate the small surface area.

Do I need prior knowledge of module design principles to use this approach?▼

Yes, applying deep module design requires existing knowledge of module design principles and testing practices to effectively structure interfaces and manage implementation complexity.

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