Claude Skills.

You will learn how skills turn your repeated tasks into reusable, auto-triggering workflows. End state is one working skill for your most-repeated task, built, evaluated, installed, and trigger-tested. After this module you can build skills with the skill-creator, debug ones that don't fire, set boundaries so they don't hijack, and install pre-built skills from the ecosystem.

1. Place skills in the context hierarchy: prompt < file < Project < skill
2. Build a first skill with the skill-creator, including evaluation
3. Install, trigger, and debug skills
4. Apply the key craft rules: descriptions decide triggering, negative boundaries prevent hijacking
5. Browse and install pre-built skills and plugins