skill-developer
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.
Profile →npx skills add sickn33/agentic-awesome-skills --skill skill-developer --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# 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 **2. Stop Hook - Error Handling Reminder** (Gentle Reminders) - **File**: `.claude/hooks/error-handling-reminder.ts` - **Trigger**: AFTER Claude finishes responding - **Purpose**: Gen
- Purpose
- When to Use This Skill
- System Overview
- Two-Hook Architecture
- Configuration File
- Skill Types
- 1. Guardrail Skills
- 2. Domain Skills
- Quick Start: Creating a New Skill
- Step 1: Create Skill File
- Step 2: Add to skill-rules.json
- Step 3: Test Triggers
- Step 4: Refine Patterns
- Step 5: Follow Anthropic Best Practices
echo '{"session_id":"test","prompt":"your test prompt"}' | \
npx tsx .claude/hooks/skill-activation-prompt.ts
cat <<'EOF' | npx tsx .claude/hooks/skill-verification-guard.ts
export SKIP_SKILL_GUARDRAILS=true # Disables ALL PreToolUse blocks
export SKIP_DB_VERIFICATION=true
export SKIP_ERROR_REMINDER=true
UserPromptSubmit
echo '{"prompt":"test"}' | npx tsx .claude/hooks/skill-activation-prompt.ts
PreToolUseWhat does the skill-developer skill do?
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.
How do I install it?
Run `npx skills add sickn33/agentic-awesome-skills --skill skill-developer --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From sickn33/agentic-awesome-skills, a repository with 44,414 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.