skill-creator

Skill Creator

Create, evaluate, and iterate on high-quality agent skills. This skill covers the whole lifecycle: planning what the skill should do, writing SKILL.md and reference files, scoring quality against a rubric, and iterating until the skill meets production standards.

Philosophy: A great skill is precise, not long. Its description routes the right requests to it. Its body gives the model the context it can't get anywhere else — the environment, tool contracts, defaults, domain judgment, and the reasons behind each constraint — and leaves out what a capable model already does on its own. Current Claude models follow instructions closely and literally, so every line gets acted on: an over-scripted or shouting skill produces rigid, over-cautious output, while a clear goal and quality bar let the model plan the work itself. references/writing-guide.md covers this in detail.

Runtime adaptation: Skills that touch external tools should detect what is installed, authenticated, and reachable at runtime and adapt, rather than assuming a single method. Offer fallback paths where real alternatives exist. See references/dynamic-calling.md for the pattern catalog.

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Step 1: Understand What the User Wants

Classify the request into one of these modes:

User Intent	Mode	Jump To
Create a brand-new skill	Create	Step 2
Improve / fix an existing skill	Improve	Step 6
Evaluate / score a skill's quality	Evaluate	Step 7