Skill Creator
This is meta-tooling for building other skills. It walks you through the full lifecycle: drafting a new skill from scratch, writing test prompts, running evals to measure performance, then iterating based on qualitative feedback and quantitative benchmarks. It also handles optimizing skill descriptions for better triggering accuracy, which matters since Claude tends to undertrigger skills by default. The workflow is flexible enough to meet users where they are, whether they're starting from zero or already have a draft that needs tuning. One thing that stands out is the attention to progressive disclosure, keeping skills under 500 lines and offloading detail to bundled resources so context doesn't bloat unnecessarily.
- skills.sh installs
- 166
- GitHub stars
- 234
- last updated
- Jun 3, 2026
Install
$ npx -y skills add flora131/atomic --skill skill-creator --agent claude-codeInstalls into .claude/skills of the current project.
Files
Skill Creator
A skill for creating new skills and iteratively improving them.
At a high level, the process of creating a skill goes like this:
- Decide what you want the skill to do and roughly how it should do it
- Write a draft of the skill
- Create a few test prompts and run claude-with-access-to-the-skill on them
- Help the user evaluate the results both qualitatively and quantitatively
- While the runs happen in the background, draft some quantitative evals if there aren't any (if there are some, you can either use as is or modify if you feel something needs to change about them). Then explain them to the user (or if they already existed, explain the ones that already exist)
- Use the
eval-viewer/generate_review.pyscript to show the user the results for them to look at, and also let them look at the quantitative metrics
- Rewrite the skill based on feedback from the user's evaluation of the results (and also if there are any glaring flaws that become apparent from the quantitative benchmarks)
- Repeat until you're satisfied
- Expand the test set and try again at larger scale
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- Repository
- github.com/flora131/atomic
- Category
- Skill Development
- First seen
- Jun 3, 2026
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