Use when the user asks to create, scaffold, update or package a skill, or asks how skill frontmatter, progressive disclosure or bundled resources should be structured. Walks through init_skill.py, writing SKILL.md and package_skill.py.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# 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.
### What Skills Provide
1. Specialized workflows - Multi-step procedures for specific domains
2. Tool integrations - Instructions for working with specific file formats or APIs
3. Domain expertise - Company-specific knowledge, schemas, business logic
4. Bundled resources - Scripts, references, and assets for complex and repetitive tasks
## Core Principles
### Concise is Key
The context window is a public good. Skills share the context window with everything else Claude needs: system prompt, conversation history, other Skills' metadata, and the actual user request.
…
The line at the top of this page pins the label git:20260914.e75f220, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
GET https://markdownregistry.com/api/v1/artifacts/art_3fj2oxj3n6d7gmek
GET https://markdownregistry.com/api/v1/resolve?ref=coco-research/coco/skill-creator
GET https://markdownregistry.com/api/v1/blob/3c4b34be461b60355ff8b316ee0782262c059d04320f9f875fb7e861fae4ced2
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
coco-research/coco · adapters/cursor/skills/create-rule/SKILL.md · Create Cursor rules for persistent AI guidance. Use when the user wants to create a rule, add coding standards, set up…
coco-research/coco · adapters/cursor/skills/create-skill/SKILL.md · Guides users through creating effective Agent Skills for Cursor. Use when the user wants to create, write, or author a…
coco-research/coco · adapters/cursor/skills/create-subagent/SKILL.md · Create custom subagents for specialized AI tasks. Use when the user wants to create a new type of subagent, set up…
coco-research/coco · adapters/cursor/skills/update-cursor-settings/SKILL.md · Modify Cursor/VSCode user settings in settings.json. Use when the user wants to change editor settings, preferences…
coco-research/coco · skills/agent-lightning/SKILL.md · Train and optimize AI agents using Microsoft's Agent Lightning framework with reinforcement learning. Use when setting…
coco-research/coco · skills/agent-self-eval/SKILL.md · Post-run self-evaluation system that scores agent output on correctness, clarity, actionability, and conciseness. Use…
coco-research/coco · skills/ai-product/SKILL.md · Use when building AI features into a product: LLM integration, RAG pipelines, guardrails, streaming, AI UX, prompt…
coco-research/coco · skills/api-design-principles/SKILL.md · Use when designing a new REST or GraphQL API, reviewing an API spec before implementation, setting team API standards…
anthropics/skills · skills/skill-creator/SKILL.md · Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a…
bytedance/deer-flow · skills/public/skill-creator/SKILL.md · Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a…
hkuds/deeptutor · deeptutor/skills/builtin/skill-creator/SKILL.md · Design and author DeepTutor skills (SKILL.md packages). Use when the user wants to create a new skill, improve an…
cherryhq/cherry-studio · resources/skills/skill-creator/SKILL.md · Create, edit, evaluate, and optimize skills, including benchmarking and description tuning for better triggering.
anthropics/claude-plugins-official · plugins/skill-creator/skills/skill-creator/SKILL.md · Create new skills, modify and improve existing skills, and measure skill performance. Use when users want to create a…
volcengine/openviking · bot/workspace/skills/skill-creator/SKILL.md · Create or update AgentSkills. Use when designing, structuring, or packaging skills with scripts, references, and assets.
garrytan/gbrain · plugin/skills/skill-creator/SKILL.md · Create new skills following the GBrain conformance standard. Generates SKILL.md
with frontmatter, Contract, Phases…
garrytan/gbrain · skills/skill-creator/SKILL.md · Create new skills following the GBrain conformance standard. Generates SKILL.md
with frontmatter, Contract, Phases…
