Skill Builder

Skill Builder

This skill helps create high-quality, reusable Agent Skills for Claude Code.

When to Use This Skill

• User explicitly asks to "create a skill", "build a new skill", "scaffold a skill", or similar.
• User describes a workflow, expertise, or task that should be packaged as a reusable skill.
• Need guidance on skill structure, best practices, or troubleshooting why a skill isn't triggering.

Step-by-Step Skill Creation Process

1. Understand the Goal
   Clarify what the new skill should do, key triggers (e.g., keywords like "PDF", "commit message"), and scope (keep it focused!).

2. Choose Skill Type and Location

   • Personal: ~/.claude/skills/new-skill-name/
   • Project: .claude/skills/new-skill-name/ (recommended for team sharing)

3. Generate SKILL.md Structure
   Use this template:

   ---
   name: your-skill-name (lowercase, hyphens only)
   description: What this skill does + when to use it (include triggers!). Keep under 1024 chars.
   # Optional: allowed-tools: Read, Grep, Bash (etc., for restricted access)
   ---
   # Skill Title
   
   ## Instructions
   Detailed step-by-step guidance for Claude.
   
   ## Examples
   Show 2-3 concrete before/after examples.
   
   ## Best Practices / Checklist
   - Bullet points for quality standards
   

4. Add Supporting Files (Optional but Recommended)

   • reference.md: Detailed docs, schemas, APIs
   • examples/ folder: Sample inputs/outputs
   • scripts/ folder: Helper Python/bash scripts (e.g., data processors)
   • templates/ folder: File templates

   Reference them like: See reference.md for details.

5. Make Description Trigger-Happy
   Good example: "Analyze React components for performance and accessibility. Use when reviewing UI code, optimizing frontend, or mentioning React/JSX."

   Bad: "Helps with code."

6. Test the Skill

   • Restart Claude Code
   • Ask: "List available skills"
   • Trigger with a matching query
   • If not activating: Refine description triggers

7. Optional: Generate Files Automatically
   Use the helper script below to scaffold a new skill directory.

Helper Script: scaffold_skill.py

Usage: python scripts/scaffold_skill.py 'Skill Name' 'Brief description with triggers'

Run it via Bash tool when needed: python scripts/scaffold_skill.py "Commit Message Generator" "Generate conventional commit messages from git diffs. Use when creating commits or reviewing changes."

Best Practices Reminder

• One skill = one focused capability
• Specific triggers in description → reliable auto-invocation
• Use allowed-tools for safe/read-only skills
• Version your skills in the markdown

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