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Agent skills

Skill creator

Listed by its author as skill-creator

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…

by anthropics · Apache-2.0 · 190k GitHub stars

DoesPerformancePrompts, agents and LLMsData analysisNews and social feeds

Source on GitHub ↗
curl -fsSL https://api.cheatcodehq.com/install.sh | sh -s -- anthropic-skill-creator --to all

Copies 1 skill into each app's skills folder (Claude Code: ~/.claude/skills), after checking every file against anthropics/skills at commit 3337550. Nothing else on your computer changes. To undo it, run the terminal command with --uninstall at the end; that also removes what the app added.

Then start a new session in your AI app and ask for the work in plain words; it picks the skill from its description. In Claude Code you can also type /anthropic-skill-creator:skill-creator.

See it in use

One real session, replayed step by step: the request, each step at the moment it happened, and the answer, unedited. Long waits are shown faster, with the real time in the corner. Sample process notes and digest invented for this example: Acme Notes is a fictional note-taking app, and every customer and number is made up.
The result
SKILL.mdWhat the session produced: SKILL.md, the file the session saved.

A ready skill file in your folder, test requests to try it with, and a list of where your notes and your example disagree.

SKILL.md, the file the session saved.

Open the whole result
Try it

After installing, start a new session and say: I do this task the same way every week; my notes are in how-i-do-it.md. Turn it into a skill and save it as my-skill/SKILL.md, with two test requests I can try.

What else it can do, and its limits
  • One skill for making skills: turns a workflow you describe into a SKILL.md with a name, a description that tells Claude when to use it, steps and rules
  • Improves an existing skill and rewrites its description so Claude picks it up at the right moments
  • Writes test requests and checks for them, and can compare results with and without the skill
  • Running tests side by side, the review page, benchmarks and packaging use its Python scripts, which need a terminal and Claude Code
  • Asks about edge cases first unless you tell it not to, and you review the skill it writes

Sample input Recorded Oct 24, 2026 in Claude Code 2.1.308 with Sonnet 5.5. The video replays that session; nothing in it was acted or edited.

What's inside 1 skill

  • skill-creatorCreate 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.

    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.

About

Public repository for Agent Skills

Where this comes from. The public repository anthropics/skills at commit 3337550, under its Apache-2.0 license, copied without changes. anthropics is not affiliated with Cheatcode and has not claimed this listing yet. New releases are repackaged after review, never synced automatically. If this is your project, write to admin@cheatcodehq.com to claim or remove it.

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Versions

v0.0.0-g3337550Listed from anthropics/skills at 3337550 · 2026-09-28