Master Skills

The unified skill library for Claude, Codex, Cursor, Antigravity & every AI agent.

2,658 skills · 15 domains · one machine-readable catalog · zero dependencies

⚡ Install  ·  🗂 Domains  ·  📦 Manifest  ·  ▶️ Usage  ·  ❓ FAQ

npx skills add sinhoneyy/master-skills

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✨ What is Master Skills

One source of truth for agent skills. Instead of juggling scattered, inconsistent collections, you get a single clean catalog — deduplicated, domain-organized, and indexed.

Master Skills is a standardized catalog of 2,658 AI-agent skills, sorted into 15 normalized domains. Every skill is runtime-agnostic — it works with Claude, Codex, Cursor, Antigravity, and anything else that loads SKILL.md skills. Each one has a stable id, version, domain, and slash trigger, all described in one authoritative manifest: skills_index.json.

2,658 unique skills

15 domains

0 dependencies

1 manifest file

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⚡ Install — choose your tool

One command installs the skills into the path your host expects:

Tool	Install	First use
Claude Code	npx master-skills --claude	/<skill> … (or the Claude plugin marketplace)
Cursor	npx master-skills --cursor	@<skill> …
Gemini CLI	npx master-skills --gemini	Use <skill> to …
Codex CLI	npx master-skills --codex	Use <skill> to …
Antigravity IDE	npx master-skills --antigravity	@<skill> …
Antigravity CLI (agy)	npx master-skills --agy	/<skill> …
Kiro	npx master-skills --kiro	@<skill> …
OpenCode	npx master-skills --opencode	opencode run @<skill> …
AdaL CLI	npx master-skills --adal	Use <skill> to …
Custom path	npx master-skills --path ./my-skills	depends on your tool

Filter what gets installed:

npx master-skills --claude --category security,backend   # only those domains
npx master-skills --cursor --risk safe,none              # only low-risk skills
npx master-skills --list                                 # show all categories
npx master-skills --path ./skills --dry-run              # preview, write nothing

Default tool paths are best-effort — if your host stores skills elsewhere, use --path.

Or clone and point your agent's loader at skills/ directly. No build step, no dependencies. ✅

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🧩 Install as a plugin (Claude · Codex · Antigravity)

Master Skills ships as one plugin with a manifest for each platform, so the same catalog installs everywhere:

Claude Code

/plugin marketplace add sinhoneyy/master-skills
/plugin install master-skills@master-skills

Codex — point Codex at the repo; it reads .codex-plugin/plugin.json (skills → ./skills/).

Antigravity — add the repo as a plugin source; it reads .agents/plugins/marketplace.json.

Platform	Manifest	Bundles?
Claude Code	.claude-plugin/marketplace.json + plugin.json	✅ all-skills + 10 themed
Antigravity	.agents/plugins/marketplace.json	✅ all-skills + 10 themed
Codex	.codex-plugin/plugin.json	single full plugin (Codex uses one plugin; filter by category)

Themed bundles

Prefer a focused set over all 2,658? Install just the role bundle you need (Claude & Antigravity):

/plugin install master-skills-security-engineer@master-skills
/plugin install master-skills-frontend-designer@master-skills

Bundle	Skills	Domains
master-skills-integrations	812	integrations
master-skills-ai-agent-builder	388	agents · ai-ml · prompt-engineering
master-skills-backend-engineer	310	backend · data-db
master-skills-frontend-designer	227	web-frontend · design-ux
master-skills-devops-cloud	160	devops-cloud
master-skills-marketing-growth	123	content-marketing
master-skills-security-engineer	98	security
master-skills-qa-testing	53	testing
master-skills-productivity	52	productivity
master-skills-mobile-developer	14	mobile

The full master-skills plugin (all 2,658) remains installable on its own.

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🗂 The 15 domains

	Domain	Skills	What's inside
🔌	integrations	812	App connectors, automation, webhooks
🧰	general	421	Cross-cutting, no single domain
⚙️	backend	233	APIs, servers, frameworks, GraphQL
🧠	prompt-engineering	193	Prompting, RAG, context, evaluation
☁️	devops-cloud	160	Docker, K8s, Terraform, AWS/Azure/GCP, CI/CD
🤖	agents	154	Multi-agent, orchestration, autonomous
🎨	web-frontend	143	React/Vue/Svelte/Angular, CSS, components
📣	content-marketing	123	SEO, copywriting, social, email
🔐	security	98	Pentest, vuln analysis, auth, crypto
🖌️	design-ux	84	Figma, canvas, brand, UI/UX
🗄️	data-db	77	SQL, Postgres/Mongo/Redis, pipelines
🧪	testing	53	Unit/E2E/TDD, Playwright, pytest
📄	productivity	52	PDF/XLSX/PPTX/DOCX, office, slides
🧬	ai-ml	41	Training, embeddings, vectors, NLP
📱	mobile	14	iOS, Android, Flutter, Swift, RN

_{Live counts always reflect skills_index.json → categories.}

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📦 The manifest

A single JSON document, skills_index.json, describes the entire library.

📋 Schema — top level

Field	Type	Description
name	string	Always "master-skills"
schemaVersion	string	Manifest schema version
version	string	Library version
generated	string	ISO-8601 UTC build timestamp
skill_count	number	Total unique skills
categories	object	{ domain: count }
skills	object[]	One entry per skill

🧩 Schema — per-skill entry

Field	Type	Description
id	string	Stable, slugified skill id
name	string	Human-readable name
version	string	Skill version (default 1.0.0)
description	string	One-line summary
category	string	Assigned domain
tags	string[]	Tags, if any
trigger	string	Slash trigger, /+id
path	string	skills/<id>

{
  "name": "master-skills",
  "schemaVersion": "1.0",
  "skill_count": 2658,
  "categories": { "integrations": 812, "general": 421, "backend": 233, "…": 0 },
  "skills": [
    {
      "id": "api-design-principles",
      "name": "API Design Principles",
      "version": "1.0.0",
      "description": "Guidelines for designing clean, consistent APIs…",
      "category": "backend",
      "trigger": "/api-design-principles",
      "path": "skills/api-design-principles"
    }
  ]
}

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📁 Repository layout

master-skills/
├─ 📂 skills/                    # 2,658 skills, flat (domain lives in the manifest)
│   ├─ api-design-principles/SKILL.md
│   ├─ adversarial-reviewer/SKILL.md
│   └─ …
├─ 🧩 .claude-plugin/            # Claude Code plugin + marketplace manifest
├─ 🧩 .codex-plugin/             # Codex plugin manifest
├─ 🧩 .agents/plugins/           # Antigravity marketplace manifest
├─ 🗂️ skills_index.json          # the manifest (id, version, category, trigger, path)
├─ 📜 CREDITS.md                  # license/source notes + full upstream notices
└─ 📖 README.md

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▶️ Using a skill

1.  Find it      →  search skills_index.json by id / trigger / category
2.  Open it      →  go to its "path", e.g. skills/api-design-principles/
3.  Invoke it    →  use its "trigger" (/api-design-principles) in your agent

Each skill keeps its full payload — SKILL.md, references, scripts, examples — exactly as published. Or just point your runtime's skill loader at the whole skills/ directory.

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❓ FAQ

How are skills organized?

Into 15 normalized domains. A skill's domain comes from its frontmatter when it maps to a known domain, otherwise a keyword heuristic, falling back to general.

How do I find a specific skill?

Search skills_index.json by id, category, or trigger — it's a flat list designed to be grepped or loaded programmatically.

Is the catalog self-contained?

Yes. After cloning, everything you need is in skills/ and the manifest — no network access or build step required to use it.

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🤝 Contributing

PRs are welcome! Good first contributions:

• ➕ Add new skills as skills/<id>/SKILL.md (set the domain via frontmatter)
• 🏷️ Improve domain classification so fewer skills land in general
• 🧪 Add manifest validation or search tooling

Every PR is automatically checked: the manifest is validated against the tree, and changed SKILL.md files are linted for structure — results posted right on your PR.

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📜 License

The Master Skills catalog tooling is MIT-licensed. Bundled skills retain their original upstream licenses — full notices live in CREDITS.md.

_{Built as one unified catalog. No dependencies. No lock-in.}

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