# Core Coding Standards

> Universal code quality rules. Extends nothing — this is the base skill every project should include. Use when writing or reviewing any code.

- Skill: `majiayu000/core-coding-standards` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds add majiayu000/core-coding-standards`
- Raw SKILL.md: https://api.skillmd.com/api/skills/majiayu000/core-coding-standards/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: majiayu000 (https://skillmd.com/u/majiayu000)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/majiayu000/core-coding-standards

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# Principles

- Keep it simple (KISS) — prefer the simplest solution that works
- Don't repeat yourself (DRY) — extract when you see three duplicates, not before
- Single Responsibility — each module/function does one thing
- Use descriptive, intention-revealing names
- Use kebab-case for files and folders
- Functions should have clear inputs and outputs with minimal side effects
- Keep functions right-sized — extract when logic needs a comment to explain
- Delete dead code — don't comment it out
- Never swallow errors silently
- Measure before optimizing — no premature performance work
- No premature abstraction — wait for three concrete duplicates before extracting

# Rules

See `rules/` for detailed patterns.