codebase-design

Design deep modular software components with defined seams and ports.

Updated Dec 17, 2025
One-click install
npx skills add https://github.com/Frantss/oxform --skill codebase-design-frantss
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: codebase-design
Source: https://github.com/Frantss/oxform/tree/main/.agents/skills/codebase-design
Command: npx skills add https://github.com/Frantss/oxform --skill codebase-design-frantss

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This skill addresses the common issue of shallow, tightly coupled codebases that are difficult to test, maintain, and navigate. It provides a shared architectural vocabulary to help developers build deep modules that offer high leverage for callers and clear locality for maintainers.

Core Features & Use Cases

  • Deep Module Design: Principles for hiding complex implementation behind simple, stable interfaces.
  • Seam Identification: Guidance on where to place boundaries to ensure code is testable and swappable.
  • Design It Twice: A structured process for exploring multiple interface alternatives before committing to an architecture.
  • Use Case: When refactoring a legacy service, use this skill to identify where to place a seam, define a port, and implement an in-memory adapter to make the logic testable without external dependencies.

Quick Start

Use the codebase-design skill to analyze the current module structure and propose a deeper interface for the authentication service.

Frequently Asked Questions about codebase-design

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

FAQPage Schema
How do I identify seams for refactoring a tightly coupled legacy codebase?

To identify seams for refactoring, you analyze the module structure to locate boundaries where code can be decoupled, enabling the placement of ports and adapters to isolate dependencies and improve testability.

What is deep module design in software architecture?

Deep module design is an architectural principle that hides complex implementation logic behind simple, stable interfaces, providing high leverage for callers and clear locality for maintainers.

How do I design testable interfaces for complex software components?

You design testable interfaces by defining ports and adapters at architectural seams, allowing logic to be tested in-memory without external dependencies, and evaluating interface leverage across the codebase.

What is the best way to evaluate interface alternatives before committing to an architecture?

The best way to evaluate alternatives is using a structured "Design It Twice" process, which facilitates exploring multiple interface designs to ensure consistent modularity principles before finalizing the architecture.

Can I use this architectural framework to improve modularity in large-scale systems?

Yes, you can use this framework to ensure consistent application of modularity principles, evaluating interface leverage and defining boundaries to improve maintainability specifically within large-scale systems.

Why does shallow module design make codebases difficult to maintain?

Shallow module design leads to tightly coupled codebases that are difficult to navigate and test, because it exposes complex implementation details rather than hiding them behind deep, high-leverage interfaces.