Skills Directory
Reusable capabilities you install into Claude Code and other AI agents with a single command. Think of it like npm — but for AI agent behaviors. One install and your agent gains that capability immediately.
What Agent Skills Actually Are
Reusable agent behaviors
A skill is a packaged set of instructions and workflows that extends what an AI agent can do. Instead of writing the same system prompt every time you want Claude to do an SEO audit, you install the skill once and it is available in every project.
One command to install
Skills are installed via the npx skills command. They work across Claude Code, Cursor, Cline, Windsurf, and any other agent that supports the skills protocol. Install once, use in any compatible tool.
Community-built and verified
Skills live on skills.sh — an open directory of community-built agent capabilities. Install counts show you what people are actually using. The most-installed skills have been battle-tested by thousands of developers.
How to Install a Skill
npx skills add owner/repo/skill-name
# Examples
npx skills add anthropics/skills/seo-audit
npx skills add anthropics/skills/systematic-debugging
npx skills add anthropics/skills/frontend-designRun this in your project terminal. The skill is added to your agent's available capabilities immediately. No restart required.
Which Agents Support Skills
Claude Code
Full support. Skills are the native extension model for Claude Code. Billy's personal default — install skills here first.
Cursor
Supported via the skills protocol. Works with Cursor's agent mode for multi-file operations.
Cline & Windsurf
Both support the skills standard. Useful when you are using Cline with a custom API key setup or Windsurf's Cascade mode.
Marketing & Advertising Skills
Skills for copywriting, SEO, content strategy, and conversion optimization. Install counts from the skills.sh leaderboard, April 2026.
| Skill | Installs | What It Does |
|---|---|---|
seo-audit | 81K | Full SEO audit of any page — title, meta, structure, internal links, schema |
copywriting | 71K | AI-powered copywriting workflows — landing pages, ads, email, product copy |
page-cro | 41K | Conversion rate optimization — analyze a page and suggest improvements |
analytics-tracking | 41K | Set up and interpret analytics — GA4, Mixpanel, event tracking plans |
launch-strategy | 40K | Plan and execute product launches — positioning, channels, timing |
email-sequence | 39K | Build full email nurture sequences — welcome, onboarding, re-engagement |
paid-ads | 39K | Google and Meta ad copy — headlines, descriptions, ad variations |
competitor-alternatives | 39K | Analyze competitors — pricing, positioning, weakness identification |
schema-markup | 39K | Add JSON-LD schema markup to any page — Article, Product, FAQ, Person |
ai-seo | 34K | SEO optimized for the AI search era — GEO principles applied to content |
ad-creative | 31K | Generate ad copy and visual concepts — hooks, CTAs, creative briefs |
cold-email | 31K | Write cold email sequences that do not sound like cold emails |
marketing-psychology | 52K | Apply psychology principles to copy — loss aversion, social proof, urgency |
content-strategy | 48K | Build full content strategies — pillars, calendar, distribution plan |
programmatic-seo | 47K | Scale SEO content programmatically — templates, data, automated generation |
pricing-strategy | 45K | Build and analyze pricing models — tiers, anchoring, competitive positioning |
marketing-ideas | 45K | Brainstorm marketing campaigns — channel mix, hooks, creative angles |
social-content | 49K | Generate social media content — platform-specific formats and hooks |
site-architecture | 28K | Plan and build site structure — URL hierarchy, internal linking, sitemaps |
lead-magnets | 21K | Create lead magnet content — guides, templates, checklists that convert |
Design Skills
Frontend UI, UX workflows, design system extraction, and mobile app patterns.
| Skill | Installs | What It Does |
|---|---|---|
frontend-design | 311K | Production-grade frontend UI — the most-installed skill on the platform |
ui-ux-pro-max | 122K | Advanced UI/UX design workflows — interaction patterns, accessibility, polish |
sleek-design-mobile-apps | 55K | Mobile app design patterns — iOS and Android conventions, touch targets |
extract-design-system | 47K | Extract design systems from existing UI — tokens, components, patterns |
canvas-design | 40K | Design in canvas format — layout, hierarchy, visual structure |
theme-factory | 30K | Generate full design themes — color palettes, typography, spacing systems |
brand-guidelines | 28K | Build brand identity systems — logo rules, color usage, voice and tone |
design-taste-frontend | 21K | Opinionated high-taste frontend design — not just functional, genuinely good-looking |
high-end-visual-design | 19K | Premium visual design quality — magazine-level polish on digital interfaces |
redesign-existing-projects | 18K | Redesign and modernize existing UI — audit, propose, implement improvements |
Firebase Skills
Billy's stack. If you are building on Firebase these are the skills to have installed before you start.
| Skill | Installs | What It Does |
|---|---|---|
firebase-basics | 26K | Firebase project setup fundamentals — init, config, project structure |
firebase-auth-basics | 26K | Firebase authentication setup — email/password, Google sign-in, security rules |
firebase-hosting-basics | 25K | Deploy to Firebase hosting — init, deploy, custom domain, rewrite rules |
firebase-ai-logic | 25K | Add AI features to Firebase apps — Vertex AI integration, Gemini in Firebase |
firebase-app-hosting-basics | 25K | Firebase app hosting setup — for Next.js and other SSR frameworks |
firebase-firestore-standard | 24K | Firestore best practices — data modeling, security rules, query patterns |
firebase-data-connect | 24K | Firebase data connections — connect Firebase to external data sources |
firebase-auth-basics and firebase-hosting-basics at the start of every Firebase project. They give Claude the correct patterns for security rules and deployment config out of the box — the two places where beginners get burned most.
Development Workflow Skills
Debugging, planning, testing, and agent coordination. These are the meta-skills — they make every other build go better.
| Skill | Installs | What It Does |
|---|---|---|
skill-creator | 155K | Build your own custom skills — the meta-skill for extending the ecosystem |
brainstorming | 111K | Structured brainstorming sessions — diverge, converge, prioritize |
systematic-debugging | 64K | Step-by-step debugging methodology — reproduce, isolate, fix, verify |
writing-plans | 63K | Write execution plans before building — forces Claude to think before it codes |
executing-plans | 51K | Execute plans step by step — tracks progress, confirms completion |
subagent-driven-development | 46K | Use subagents for parallel work — spawn multiple agents for independent tasks |
verification-before-completion | 44K | Verify work before marking done — Claude checks its own output against requirements |
test-driven-development | 54K | TDD workflow for AI agents — write tests first, then make them pass |
systematic-debugging and writing-plans are the two that change how Claude approaches problems. Debugging stops being "Claude guesses" and starts being a structured process. Planning stops Claude from jumping straight to code before thinking the problem through.
See the Full Directory
This page covers Billy's curated picks. The full leaderboard with hundreds of community skills lives at skills.sh.