Software Design Principles

Name: Software Design Principles
Availability: InStock
Author: Audun Fauchald Strand

Codify software design principles for refactoring and architecture reviews.

Updated Dec 6, 2025

Search Tags:#architecture #refactoring #design-principles #naming #software-engineering #fail-fast #clean-code

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npx skills add https://github.com/audunstrand/status-app --skill software-design-principles

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: Software Design Principles
Source: https://github.com/audunstrand/status-app/tree/main/.github/skills/software-design-principles
Command: npx skills add https://github.com/audunstrand/status-app --skill software-design-principles

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill codifies core software design principles to produce maintainable, well-structured code.

Core Features & Use Cases

Object calisthenics and disciplined naming: Enforce clarity and domain-focused naming to improve readability and reduce unnecessary comments.
Dependency inversion and testability: Encourage dependency injection to simplify testing and future changes.
Fail-fast error handling: Promote explicit validation and early failure to catch issues at the source.
Type-driven design and immutability: Favor strong types and immutable patterns to prevent illegal states and side effects.
Use during refactoring and design reviews: Apply these principles when restructuring code or evaluating architecture.

Quick Start

Replace generic names such as data, utils, or helpers with domain-specific terms during code reviews. Introduce explicit interfaces for dependencies and apply dependency injection. Add explicit validations and fail-fast errors to surface problems at the source.

Frequently Asked Questions about Software Design Principles

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

FAQPage Schema

How do I apply fail-fast error handling and explicit validation to improve code robustness?▼

Fail-fast error handling improves robustness by adding explicit validations to surface problems at the source, catching issues early through type-driven design before they propagate through the system.

What is object calisthenics and how does it help with intention-revealing naming?▼

Object calisthenics enforces clarity through intention-revealing naming, replacing generic names like utils or helpers with domain-specific terms to improve readability and reduce unnecessary comments.

How do I use dependency inversion and injection to simplify software testing?▼

Dependency inversion simplifies testing by introducing explicit interfaces for dependencies and applying dependency injection, which decouples components and encourages future architectural changes.

Can I use these software design principles across different programming languages?▼

These software design principles are applicable across languages, emphasizing universal best practices like avoiding unsafe types, embracing immutability, and enforcing explicit error handling.

What is the best way to enforce immutability and type-driven design to prevent illegal states?▼

Type-driven design prevents illegal states by favoring strong types and immutable patterns, ensuring that invalid data structures cannot be constructed and eliminating unexpected side effects.

When do I need core software design principles during architecture discussions and refactoring?▼

Core software design principles are needed during refactoring and design reviews to codify best practices, restructure code, and evaluate architecture to produce maintainable, well-structured code.