# Key Guidelines

> Core development principles and standards for consistent, high-quality code. Automatically applies DRY, KISS, YAGNI, SOLID, TDD, and micro-commit methodologies.

- Skill: `gendosu/key-guidelines` (Agent Skill)
- Install (CLI): `npx skillmds@latest add gendosu/key-guidelines`
- Raw SKILL.md: https://api.skillmd.com/api/skills/gendosu/key-guidelines/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: gendosu (https://skillmd.com/u/gendosu)
- Updated: 2026-09-10
- Page: https://skillmd.com/skills/gendosu/key-guidelines

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# Key Guidelines

## Design Principles
- **DRY (Don't Repeat Yourself)**: Avoid code duplication
- **KISS (Keep It Simple, Stupid)**: Keep designs and code simple
- **YAGNI (You Ain't Gonna Need It)**: Don't implement features until actually needed. Extract methods/functions only when there's a concrete need for reuse, not in anticipation of it
- **SOLID Principles**: Single Responsibility, Open/Closed, Liskov Substitution, Interface Segregation, Dependency Inversion
- **SoC (Separation of Concerns)**: Separate system by concerns (UI, business logic, data access, etc.)

## Development Methodology
- **TDD Approach**: Use TDD methodology (Kent Beck style) to break down tasks during execution
- **Micro-commits**: One change per commit, strictly follow test-driven change cycles (Lucas Rocha's micro-commit methodology)

## Quality & Standards
- **Code Quality**: Run linters and type checkers before committing
- **Security**: Always follow security guidelines and scan for vulnerabilities
- **Documentation**: Keep technical documentation in `docs/` directory
- **Version Control**: Follow conventional commit messages and branching strategy