skill-builder SKILL.md skillA
skill-builder from frankxai/claude-skills-library is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add frankxai/claude-skills-library/skill-builder@git:20261014.6571e8dPins git:20261014.6571e8d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- frankxai/claude-skills-library
- Path
free-skills/skill-builder/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261014.6571e8d, committed Oct 14, 2026
- First version recorded
- Sep 19, 2026
- Size
- 21,919 bytes
- Repository stars
- 48
- License
- MIT
Create new Claude Code Skills with proper YAML frontmatter, progressive disclosure structure, and complete directory organization. Use when you need to build custom skills for specific workflows, generate skill templates, or understand the Claude Skills specification.
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 Builder ## What This Skill Does Creates production-ready Claude Code Skills with proper YAML frontmatter, progressive disclosure architecture, and complete file/folder structure. This skill guides you through building skills that Claude can autonomously discover and use across all surfaces (Claude.ai, Claude Code, SDK, API). ## Prerequisites - Claude Code 2.0+ or Claude.ai with Skills support - Basic understanding of Markdown and YAML - Text editor or IDE ## Quick Start ### Creating Your First Skill ```bash # 1. Create skill directory (MUST be at top level, NOT in subdirectories!) mkdir -p ~/.claude/skills/my-first-skill # 2. Create SKILL.md with proper format cat > ~/.claude/skills/my-first-skill/SKILL.md << 'EOF' --- name: "My First Skill" description: "Brief description of what this skill does and when Claude should use it. Maximum 1024 characters." --- # My First Skill ## What This Skill Does [Your instructions here] ## Quick Start [Basic usage] EOF # 3. Verify skill is detected # Restart Claude Code or refresh Claude.ai ``` --- ## Complete Specification ### 📋 YAML Frontmatter (REQUIRED) …
Read the whole file at its exact version.
How to install
mdr add frankxai/claude-skills-library/skill-builder@sha256:01b93ef794a41d3cThe line at the top of this page pins the label git:20261014.6571e8d, 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.
[](https://markdownregistry.com/a/art_5d4rdh7im7uwoteb)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Sep 19, 2026 and Oct 14, 2026, about one every 25 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261014.6571e8d latest | 2026-10-14 | 6571e8d | 21,919 B | A | view · diff |
| git:20260919.d800c14 | 2026-09-19 | d800c14 | 21,899 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (21919 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
frankxai/claude-skills-library · 48 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_5d4rdh7im7uwoteb GET https://markdownregistry.com/api/v1/resolve?ref=frankxai/claude-skills-library/skill-builder GET https://markdownregistry.com/api/v1/blob/01b93ef794a41d3c471c704a73046b9739a0678c8530d317fb3d490e48eda930
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.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.
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