# Skill Development > Skill Development Rules Use when this capability is needed. - Skill: `tomevault-io/skill-development-4` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/skill-development-4` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/skill-development-4/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/skill-development-4 --- # Skill Development Rules When working with files in `.claude/skills/`: ## SKILL.md Structure ```yaml ``` ## DO - Keep SKILL.md concise (< 200 lines) - Include clear "When to Use" section - Provide copy-paste bash commands - Reference scripts/ for MCP operations - Add triggers to skill-rules.json ## DON'T - Include implementation details in SKILL.md - Duplicate content across skills - Create skills without corresponding trigger in skill-rules.json - Use allowed-tools that aren't needed ## MCP Wrapper Skills For skills that wrap MCP scripts: - Use `allowed-tools: [Bash, Read]` to restrict capabilities - Point to the script in scripts/ directory - Include parameter documentation --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/parcadei) — claim your Tome and manage your conversions.