Skill Developer
Create and manage Claude Code skills following Anthropic best practices.
Install
npx skills add diet103/claude-code-infrastructure-showcase --skill skill-developer -g -a claude-code -y- Repository
- diet103/claude-code-infrastructure-showcase10k
- Category
- Testing
- Updated
- 4mo ago
- License
- MIT
- Context cost
- Mediumabout 3,000 tokens
- Runs scripts
- No, instructions only
What it does
Create and manage Claude Code skills following Anthropic best practices. Use when creating new skills, modifying skill-rules.json, understanding trigger patterns, working with hooks, debugging skill activation, or implementing progressive disclosure. Covers skill structure, YAML frontmatter, trigger types (keywords, intent patterns, file paths, content patterns), enforcement levels (block, suggest, warn), hook mechanisms (UserPromptSubmit, PreToolUse), session tracking, and the 500-line rule.
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
Hook Architecture (five wired hooks)
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 (regex or optional AI classification)
- Method: Injects formatted reminder as context (stdout → Claude's input)
- Enforcement: Only
enforcement: "block"skills are marked MANDATORY;suggest/warnskills always appear as recommendations
2. PreToolUse Hook - Skill Verification Guard (Enforcement)
- File:
.claude/hooks/skill-verification-guard.ts - Trigger: BEFORE Edit/MultiEdit/Write executes
- Purpose: Enforce mandatory skill activation (two-try model) and guardrail file/content patterns; optional AI edit analysis
- Method: Exit code 2 + stderr blocks the tool; only
enforcement: "block"skills can block
3. PostToolUse Hook - Edit Tracker
- File:
.claude/hooks/post-tool-use-tracker.sh - Trigger: AFTER Edit/MultiEdit/Write completes
- Purpose: Track edited files and repos (feeds build checks and the error-handling reminder)
