Skill Creator

If you're building skills for Claude, eventually you'll want to build a skill about building skills. This one handles the full lifecycle: scaffolding new skills from scratch, running eval loops with test prompts, benchmarking performance with quantitative metrics, and optimizing skill descriptions so they actually trigger when they should. The workflow is interview the user about intent and edge cases, draft the SKILL.md, generate test cases, run Claude against them, review results qualitatively and quantitatively, then iterate. It also includes a separate flow for tuning descriptions since undertriggering is apparently a common problem. Most useful when you're serious about testing rather than vibing, though it explicitly supports both modes depending on your tolerance for ceremony.

GitHub stars: 47.2K
last updated: Jun 11, 2026

View on GitHub

Install

$ npx -y skills add cherryhq/cherry-studio --skill skill-creator --agent claude-code

Installs into .claude/skills of the current project.

Files

Cherry Studio workflow (READ FIRST — overrides packaging / install steps below)

You are running inside Cherry Studio. Skills live in a managed registry that Cherry keeps in sync with the filesystem automatically — there is no install or register tool to call, and you should ignore any package_skill.py / .skill packaging steps mentioned later in this file (they apply to Claude Code / Claude.ai, not here).

To create a new skill, write it straight into Cherry's managed skills directory:

Resolve the directory once by running echo "$CHERRY_STUDIO_SKILLS_DIR" in Bash. That folder is Cherry's managed skill library.
Create $CHERRY_STUDIO_SKILLS_DIR/<skill-folder-name>/ and write SKILL.md plus any supporting files (scripts/, references/, assets/) into it with your normal file tools.
That's it. Cherry's skill sync detects the new directory, registers it in the catalog, and lists it in the app — no register step. You can re-edit the files in place at any time and the changes are picked up on the next sync.