Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations.
SkillScore88Maintained
Automatic
◆AI Engineer pack
Last verified 8/30/2026
What it changes
Passed 21 of 24 test cases with the skill, and 15 of 24 without it.
Without skill63%
With skill88%
Checks it passed that the model alone missed
The response identifies editing the skill as step 4.
The response identifies packaging the skill as step 5.
The response identifies initializing the skill as step 3.
and 3 more in the full report
6 fixed15 passed either way3 still failing0 broke
Pass-rate lift
+25 pp
Tokens
-22%
Agent turns
0%
Response time
-33%
Model gemini-3.6-flashMeasured 8/30/2026v121 of 24 cases passed with skill
Tokens, turns and time describe resource use, not a dollar price.
See it in action
One of 6 test cases the skill fixed. Same model, same prompt, with and without the skill.
1 of 6
Prompt
What is the initial step when creating a new skill according to modular skill creation principles?
What was checked, without and with the skill
Checked
Without skill
With skill
The response identifies understanding the skill with concrete examples as step 1.
Missed
Passed
case-11 · gemini-3.6-flash · 8/30/2026 · answers are capped and redacted
What's inside
The instructions your model reads when the skill loads.
SKILL.md24 lines6 filesincludes scripts
Skill Creator
This skill provides guidance for creating effective skills.
About Skills
Skills are modular, self-contained packages that extend Claude's capabilities by providing
specialized knowledge, workflows, and tools. Think of them as "onboarding guides" for specific
domains or tasks—they transform Claude from a general-purpose agent into a specialized agent
equipped with procedural knowledge that no model can fully possess.
🧠 Knowledge Modules (Fractal Skills)
1. What Skills Provide
2. Concise is Key
3. Set Appropriate Degrees of Freedom
4. Anatomy of a Skill
5. Progressive Disclosure Design Principle
6. Step 1: Understanding the Skill with Concrete Examples