Skill Builder SKILL.md skillA
This file is byte-identical to the first copy the registry indexed, one of 3 indexed copies. Same content hash, so the same checks give both the same grade.
Skill Builder from spencermarx/open-code-review is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add spencermarx/open-code-review/Skill Builder@git:20260304.1a73d7fPins git:20260304.1a73d7f in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- spencermarx/open-code-review
- Path
.claude/skills/skill-builder/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260304.1a73d7f, committed Mar 4, 2026
- Size
- 21,901 bytes
- Repository stars
- 382
- License
- Apache-2.0
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 spencermarx/open-code-review/Skill Builder@sha256:3ebb2c70e4d816c2The line at the top of this page pins the label git:20260304.1a73d7f, 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_43cwjwq2srzrvju4)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 4, 2026.
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 (21901 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
spencermarx/open-code-review · 382 stars · license Apache-2.0 · pushed 2026-11-01 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_43cwjwq2srzrvju4 GET https://markdownregistry.com/api/v1/resolve?ref=spencermarx/open-code-review/Skill Builder GET https://markdownregistry.com/api/v1/blob/3ebb2c70e4d816c24ce7ac03c762b0bba1afaa34505e3aaa3c04f65ed8270297
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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