codebase-design

Design deep modules and identify seams for testable codebases.

63|9|Updated Jun 15, 2025
One-click install
npx skills add https://github.com/willdady/platypus --skill codebase-design-willdady
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: codebase-design
Source: https://github.com/willdady/platypus/tree/main/.agents/skills/codebase-design
Command: npx skills add https://github.com/willdady/platypus --skill codebase-design-willdady

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 and maintain by providing a shared vocabulary and architectural framework for designing deep modules.

Core Features & Use Cases

  • Deep Module Design: Learn to hide complex implementation details behind simple, robust interfaces to maximize leverage and locality.
  • Seam Identification: Strategically place seams in your code to enable effective testing and modularity without unnecessary indirection.
  • Parallel Design Exploration: Use the Design It Twice pattern to spawn sub-agents that generate multiple architectural approaches for a single problem, allowing you to compare trade-offs before committing to a path.

Quick Start

Analyze the current module structure and suggest a seam placement to improve testability for the payment processing logic.

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 in a codebase to improve testability?

Identifying seams in a codebase involves strategically placing separation points to enable effective testing and modularity without introducing unnecessary indirection. This skill evaluates dependency categories to find optimal separation placement.

What is deep module design in software architecture?

Deep module design in software architecture is an approach that hides complex implementation details behind simple, robust interfaces. This technique maximizes leverage and locality to prevent tightly coupled, hard-to-maintain codebases.

How do I compare architectural trade-offs before committing to a design pattern?

You compare architectural trade-offs by using the Design It Twice pattern to spawn parallel sub-agents. These sub-agents generate multiple architectural approaches for a single problem, allowing you to evaluate interface trade-offs side by side.

When should I implement ports and adapters for refactoring?

You should implement ports and adapters during refactoring when you need to isolate dependencies and improve testability. This skill facilitates evaluating dependency categories to determine optimal integration boundaries for your architecture.

Best way to structure a codebase for modularity and maintainability?

The best way to structure a codebase for modularity is applying a shared architectural framework that emphasizes deep modules and optimal seams. This approach reduces tight coupling and simplifies long-term codebase maintenance.