skill-creator

name	skill-creator
description	Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a skill from scratch, edit, or optimize an existing skill, run evals to test a skill, benchmark skill performance, or optimize a skill's description for better triggering accuracy.
emoji	🛠️

A skill is a SKILL.md with YAML frontmatter (name, description, optional when_to_use/allowed-tools) plus a markdown body of instructions, optionally with bundled resource files.

Loop: define intent -> draft -> test with realistic prompts -> evaluate (qualitatively + with a few saved evals) -> improve -> repeat -> package.

Guidance:

• Make the description "pushy" and specific so the skill triggers reliably (under-triggering is the most common failure).
• Keep the body focused (~under 500 lines); use progressive disclosure — link out to reference files for depth instead of inlining everything.
• Explain the "why", prefer imperative voice, and give concrete examples.
• Save 2-3 should-trigger and should-not-trigger prompts to sanity-check triggering before shipping.

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Source: github.com/anthropics/skills (Apache-2.0). Condensed + attributed for the corlinman marketplace; see ../../ATTRIBUTION.md.