Skill Developer
This is the meta-skill for building Claude Code skills themselves. It walks you through the whole system: creating SKILL.md files with proper YAML frontmatter, configuring triggers in skill-rules.json (keywords, intent patterns, file paths), choosing between block/suggest/warn enforcement, and working with the two-hook architecture (UserPromptSubmit for suggestions, plus gentle post-response reminders). The guide covers Anthropic's 500-line rule and progressive disclosure pattern, plus practical stuff like session tracking to avoid nagging and skip conditions when you need an escape hatch. If you're writing custom skills or debugging why one isn't activating, this has the complete reference and testing commands.
- skills.sh installs
- 312
- GitHub stars
- 33.2K
- last updated
- Aug 21, 2026
Install
$ npx -y skills add davila7/claude-code-templates --skill skill-developer --agent claude-codeInstalls into .claude/skills of the current project.
Files
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.
When to Use This Skill
Automatically activates when you mention:
- Creating or adding skills
- Modifying skill triggers or rules
- Understanding how skill activation works
- Debugging skill activation issues
- Working with skill-rules.json
- Hook system mechanics
- Claude Code best practices
- Progressive disclosure
- YAML frontmatter
- 500-line rule
System Overview
Two-Hook Architecture
1. UserPromptSubmit Hook (Proactive Suggestions)
- File:
.claude/hooks/skill-activation-prompt.ts - Trigger: BEFORE Claude sees user's prompt
- Purpose: Suggest relevant skills based on keywords + intent patterns
- Method: Injects formatted reminder as context (stdout → Claude's input)
- Use Cases: Topic-based skills, implicit work detection
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- Repository
- github.com/davila7/claude-code-templates
- Categories
- Frontend Development, AI & Agent Building, Debugging
- First seen
- Jun 3, 2026
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