skill-developer

Create a Claude Code skill by defining a SKILL.md frontmatter file, configuring skill-rules.json with trigger patterns (keyword, intent, file path, content), and setting enforcement levels (block, suggest, warn). The skill-developer guide walks through the two-hook architecture—UserPromptSubmit and PreToolUse—to enforce guardrails across your workflow.

Trigger types identify when a skill activates: keyword matching, intent detection, file paths, and content patterns. Enforcement levels control the response: block prevents execution, suggest offers guidance, and warn alerts without stopping. Choose based on risk—database operations warrant block, style guidance uses suggest.

UserPromptSubmit hooks intercept user input before Claude processes it; PreToolUse hooks fire before tool execution. Together they govern skill activation across the workflow, manage session state, and handle exit codes. This two-hook architecture enables precise enforcement points for guardrails like Prisma verification or React component standards.

Yes. skill-rules.json drives rule parsing and skill activation based on frontmatter definitions. It supports schema compliance, skip conditions, and block messaging. Use it to enforce standards like database verification or error-handling patterns—the skill handles JSON schema validation and automated testing scaffolds.

The skill-developer framework includes automated testing scaffolds to validate trigger patterns and enforcement behavior. Test across scenarios—Prisma workflows, React components, error handling—to verify that keyword/intent and file/content triggers fire correctly at the right hook points with appropriate enforcement levels.

Yes, npm is a required dependency for skill development. Use it to manage references and components, configure your skill environment, and run the automated testing scaffolds included in the skill-developer framework.