Create or update Claude Code skills following Anthropic's official skill standard. Use when user says "create a skill", "new skill", "write a skill", "update a skill", "skill standard", or any time a new SKILL.md file needs to be created. Also use when reviewing existing skills for standards compliance.
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 Creation Guide
Reference for creating skills that follow the Anthropic skill standard (github.com/anthropics/skills).
## Skill Anatomy
```
skill-name/
├── SKILL.md (required)
│ ├── YAML frontmatter (name, description required)
│ └── Markdown instructions (<500 lines)
└── Bundled Resources (optional)
├── scripts/ - Executable code for deterministic tasks
├── references/ - Docs loaded into context as needed
└── assets/ - Templates, icons, fonts for outputs
```
## Progressive Disclosure
Skills load in three layers:
1. **Metadata** (name + description) - Always in context (~100 words)
2. **SKILL.md body** - Loaded when skill triggers (<500 lines)
3. **Bundled resources** - Loaded as needed (unlimited size)
Keep SKILL.md under 500 lines. If approaching the limit, move content to `references/` with clear pointers about when to read each file.
## YAML Frontmatter
Two required fields:
```yaml
---
name: skill-name
description: What the skill does AND when to trigger it. All "when to use" context goes here, not in the body.
---
```
### Description is the Trigger
…
The line at the top of this page pins the label git:20260303.4fa499f, 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_ysns3wdgcxuez7ba
GET https://markdownregistry.com/api/v1/resolve?ref=qa-aman/claude-skills/create-skill
GET https://markdownregistry.com/api/v1/blob/1bca5c76e022b49f35ccc0c25a71a55111ce40f01fb4dcdaa9461ff13d28b054
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.
qa-aman/claude-skills · .claude/skills/sync-skills/SKILL.md · Fetch skills from projects on the current system, genericize them, and add to the claude-skills repository. Use when…
qa-aman/claude-skills · skills/by-role/accountant/audit-workpaper/SKILL.md · Write a clear, reviewable audit workpaper documenting procedures, evidence, and conclusions. Use when an auditor says…
qa-aman/claude-skills · skills/by-role/accountant/budget-variance-analysis/SKILL.md · Analyze budget vs. actual variances, identify root causes, and recommend corrective actions. Use when an accountant or…
qa-aman/claude-skills · skills/by-role/accountant/financial-statement-review/SKILL.md · Analyze and interpret financial statements to surface performance signals, quality concerns, and red flags. Use when an…
qa-aman/claude-skills · skills/by-role/accountant/month-end-close/SKILL.md · Run, document, or review a structured month-end close process. Use when an accountant says "help me with month-end…
qa-aman/claude-skills · skills/by-role/accountant/tax-position-memo/SKILL.md · Write a technical tax position memo that documents a tax filing position with authorities, facts, analysis, and…
qa-aman/claude-skills · skills/by-role/business-analyst/acceptance-criteria-writer/SKILL.md · Write measurable acceptance criteria for requirements or user stories. Use when the user says "write acceptance…
qa-aman/claude-skills · skills/by-role/business-analyst/brd-writer/SKILL.md · Write a Business Requirements Document. Use when the user says "write a BRD", "business requirements", "document the…
qa-aman/claude-skills · skills/by-role/business-analyst/cost-benefit-analysis/SKILL.md · Build a business case with costs, benefits, and ROI. Use when the user says "cost-benefit analysis", "business case"…
qa-aman/claude-skills · skills/by-role/business-analyst/data-dictionary/SKILL.md · Generate a data dictionary documenting entities, fields, and business rules. Use when the user says "data dictionary"…
qa-aman/claude-skills · skills/by-role/business-analyst/decision-matrix/SKILL.md · Build a weighted decision matrix to evaluate options. Use when the user says "decision matrix", "compare options"…
cherryhq/cherry-studio · .agents/skills/create-skill/SKILL.md · Create a new skill in the current repository. Use when the user wants to create/add a new skill, or mentions creating a…
tailcallhq/forgecode · crates/forge_repo/src/skills/create-skill/SKILL.md · Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an…
dotnet/skills · .agents/skills/create-skill/SKILL.md · Scaffolds new agent skills for the dotnet/skills repository. Use when creating a new skill, generating SKILL.md files…
sethgammon/citadel · skills/create-skill/SKILL.md · Creates new skills from the user's repeating patterns. Interview-driven: discovers the task, analyzes failure modes…
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…
affitor/affiliate-skills · skills/meta/create-skill/SKILL.md · Turn a repeatable AI prompt or workflow into a structured, shareable skill for the affiliate-skills GitHub repository…
aiskillstore/marketplace · skills/0xmsc/create-skill/SKILL.md · Guide for creating new Agent Skills. Use this skill when you need to create a new skill.
tobihagemann/turbo · codex/skills/create-skill/SKILL.md · Create a new skill or update an existing skill that extends Codex's capabilities with specialized knowledge, workflows…