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skill-creator Claude Code Skill

Author
Anthropic
Topics
Claude Code Customization & Workflow · Code Quality, Review & Testing
First cataloged
2026-07-09 (UTC)
Explanation last updated
2026-10-09 (UTC)
Source (GitHub) last updated
2026-04-20 (UTC) (178 days ago)

The explanation below is AI-generated. Please verify it against the sources.

skill-creator is a meta-skill that helps a user design, test, and refine other Claude skills. It walks through an interview to pin down a skill's purpose, trigger conditions, and expected output, then drafts the SKILL.md file. It generates test prompts and runs them through subagents both with and without the skill so the outputs can be compared, grades those outputs against assertions, and compiles benchmark statistics such as pass rate, run time, and token usage. Results are shown in a review viewer so the user can give feedback, which is then used to iterate on the skill across multiple rounds. It also includes a separate loop for optimizing the skill's trigger description and a step for packaging the finished skill into an installable file.

What you can do with skill-creator

  • Draft a new skill's SKILL.md based on an interview about its purpose, trigger conditions, and output format
  • Generate test prompts and run them with and without the skill via subagents for comparison
  • Grade outputs against assertions and compile benchmark statistics (pass rate, run time, token usage)
  • Launch a local review viewer to collect qualitative feedback from the user on test outputs
  • Iterate on the skill's content across multiple rounds based on that feedback
  • Run a description-optimization loop using generated trigger and non-trigger queries to improve triggering accuracy
  • Package the finished skill into an installable .skill file

Sources

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