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Skill Creator

Guides you through creating new skills, refining existing ones, and measuring their actual performance.

productivityclaudecodexby Anthropic

When to use

  • You want to create a new skill for a recurring task.
  • You have a skill that doesn't always behave well — and want a structured way to iterate it.
  • You need to measure how well a skill performs against real cases.

What it does

  • Helps you define the goal of the skill (when it activates, what it does, what stays out of scope).
  • Drafts the SKILL.md following the conventions that work across AIs.
  • Suggests test cases to validate it.
  • Provides an iteration cycle: draft → test → measure → adjust.

How to use

  1. Tell your AI: "I want to create a skill for X using skill-creator".
  2. Answer the structured questions (goal, scope, anti-examples).
  3. Review the generated SKILL.md and tweak prose.
  4. Run the test cases the skill suggests; adjust until it converges.

Best for

Power users with recurring use cases that justify converting their prompts into reusable skills. Solo builders who want their AI to specialize in their domain without depending on a third-party catalog.

How does the install work? The button above opens TerminalSync (the desktop app) and downloads SKILL.md into ~/.claude/skills/skill-creator/. If you have Codex, it also writes to ~/.codex/skills/skill-creator/. Skills Sync replicates it across every machine automatically.