Skill Developer Guide

Purpose

Comprehensive guide for creating and managing skills in Claude Code with auto-activation system, following Anthropic's official best practices including the 500-line rule and progressive disclosure pattern.

Domain Skill for Skill System

This is a domain skill for the skills system itself. It's automatically loaded when you work with skills.

This skill covers:

• The 500-line rule (max 5 files > 500 lines, none > 600 lines)
• TOC and line number prohibition (never add these to skills)
• When skills need updates (new dirs, patterns, docs, triggers)
• Self-healing mechanisms (pre-commit hook, /wrap checklist)
• Progressive disclosure patterns (main file → resource files)

Use this skill explicitly when: