skill-creator (vendored)

Vendored from anthropics/skills/skills/skill-creator. Synced via make sync; do not edit skills/vendor/skill-creator/SKILL.md locally — changes will be clobbered on the next sync.

Upstream frontmatter 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 with variance analysis, or optimize a skill's description for better triggering accuracy.

What it teaches

Anthropic's own methodology for authoring skills, including:

• Evaluation harness for measuring how reliably a skill's description actually triggers on the prompts it should.
• Benchmarking with variance analysis (repeat runs to distinguish real gains from noise).
• Optimization loops for iterating on the description field until trigger rate meets target.

skill-creator vs local skill-author

Aspect	skill-creator (vendored, this)	skill-author (local)
Focus	Evaluation — test cases, trigger-rate benchmarks, variance	Authoring — scaffolding, linting, agentskills.io best practices
Scripts	Eval harness, benchmarking	new-skill.sh, lint-skill.sh
When to use	After authoring, to measure & optimize	While writing the SKILL.md + references + scripts

The two are complementary — use skill-author to build the skill, then skill-creator to evaluate and tune its trigger description.

Canonical SKILL.md

See skills/vendor/skill-creator/SKILL.md for the full instructions. Upstream source: anthropics/skills.