design

Design software systems using SOLID, DRY, KISS, YAGNI, and security-by-design principles.

68|1|Updated Jan 14, 2026

Search Tags:#design #architecture #DRY #KISS #SOLID #requirements-analysis #security-by-design

Ready to run

npx skills add https://github.com/knoopx/pi --skill design-knoopx

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: design
Source: https://github.com/knoopx/pi/tree/main/agent/skills/design
Command: npx skills add https://github.com/knoopx/pi --skill design-knoopx

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This skill helps architects and engineers design software systems by applying SOLID, DRY, KISS, YAGNI, and security-by-design principles to improve modularity, maintainability, and security.

Core Features & Use Cases

Requirements analysis guidance: helps define scope, identify requirements, and plan validation.
Architecture & design guidance: enforces principles (SOLID, DRY, KISS, YAGNI) and clear module boundaries.
Security-by-design checks: promotes threat modeling, validation, and secure-by-default decisions.

Quick Start

Use the design skill to draft an architecture plan for a new feature by outlining modules, interfaces, and responsibilities adhering to SOLID, DRY, KISS, YAGNI, and security-by-design practices.

Frequently Asked Questions about design

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

FAQPage Schema

How do I design software architecture using SOLID principles?▼

Apply SOLID principles to software design by defining clear module boundaries, outlining interfaces and responsibilities, and enforcing DRY, KISS, and YAGNI practices to improve modularity and maintainability across varying project scales.

What is security-by-design in software architecture?▼

Security-by-design integrates threat modeling, validation, and secure-by-default decisions into the system architecture process to ensure robust protection across all modules and interfaces.

How do I plan features and define requirements for a new software module?▼

Conduct requirements analysis to define project scope, identify specific requirements, and plan validation strategies, ensuring the resulting feature plan adheres to DRY, KISS, and YAGNI principles.

Can I use DRY and KISS principles for large-scale software projects?▼

Apply DRY, KISS, and YAGNI principles to large-scale software projects to enforce clear module boundaries, improve maintainability, and guide architectural decision making across varying project scales.

How do I enforce modularity and testability in software design?▼

Enforce modularity and testability in software design by applying SOLID principles, establishing clear module boundaries, defining distinct interfaces, and utilizing architectural checklists to guide secure and maintainable development practices.

When should I apply YAGNI in architectural decision making?▼

Apply YAGNI during architectural decision making when defining module boundaries and planning features to prevent over-engineering, ensuring the architecture strictly adheres to necessary requirements while maintaining modularity and maintainability.