company skills

skills published by companies for their own products. high trust — they know their APIs best. see official for Anthropic's own skills.

tier 1: essential

Vercel (vercel-labs/agent-skills, 24.9k stars)

web-design-guidelines — 100+ accessibility, performance, and UX rules. 133k weekly installs. the most-installed community skill.
react-best-practices — 57 React/Next.js performance optimization rules
composition-patterns — compound components, context providers, clean APIs
next-best-practices — Next.js recommended patterns
next-cache-components — caching strategies
next-upgrade — version upgrade guide
react-native-skills — React Native performance guidelines

also (relevant to development): agent-browser (14k stars) — headless browser automation CLI in Rust + Playwright.

Trail of Bits (trailofbits/skills, 4.5k stars)

40+ professional security skills. Trail of Bits is one of the top security auditing firms. see security for the full breakdown.

highlights: static-analysis (CodeQL + Semgrep), variant-analysis, building-secure-contracts, supply-chain-risk-auditor, audit-context-building, mutation-testing, property-based-testing.

Cloudflare

agents-sdk — stateful AI agents with scheduling, RPC, MCP servers
building-ai-agent-on-cloudflare — AI agents with state + WebSockets
building-mcp-server-on-cloudflare — remote MCP servers with OAuth
durable-objects — stateful coordination with RPC, SQLite, WebSockets
web-perf — Core Web Vitals audit
wrangler — Workers, KV, R2, D1, Vectorize, Queues, Workflows

tier 2: strong if you use the product

HashiCorp/Terraform (hashicorp/agent-skills, 534 stars)

11 skills: azure-verified-modules, new-terraform-provider, provider-resources, provider-test-patterns, provider-actions, run-acceptance-tests, refactor-module, terraform-search-import, terraform-style-guide, terraform-stacks, terraform-test

Stripe

stripe-best-practices — building Stripe integrations
upgrade-stripe — upgrade SDK/API versions

Expo (expo/skills)

official skills for Expo/React Native: building-ui, data-fetching, deployment

Netlify (12 skills)

netlify-functions, netlify-edge-functions, netlify-blobs, netlify-db, netlify-image-cdn, netlify-forms, netlify-frameworks, netlify-caching, netlify-config, netlify-cli-and-deploy, netlify-deploy, netlify-ai-gateway

Remotion (remotion-dev/skills, 2.7k stars)

remotion-best-practices — programmatic video creation with React. 117k weekly installs. see creative-and-media.

Firecrawl (8 skills)

firecrawl-cli, firecrawl-agent, firecrawl-browser, firecrawl-crawl, firecrawl-download, firecrawl-map, firecrawl-scrape, firecrawl-search

Neon (3 skills)

neon-postgres, claimable-postgres, neon-postgres-egress-optimizer

tier 3: niche but solid

Google Labs (Stitch)

design-md, enhance-prompt, react-components, remotion, shadcn-ui, stitch-loop

Sanity (4 skills)

sanity-best-practices, content-modeling-best-practices, seo-aeo-best-practices, content-experimentation-best-practices

Tinybird (4 skills)

tinybird-best-practices, tinybird-cli-guidelines, tinybird-python-sdk-guidelines, tinybird-typescript-sdk-guidelines

Better Auth (7 skills)

best-practices, explain-error, providers, create-auth, emailAndPassword, organization, twoFactor

Callstack (3 skills)

react-native-best-practices, github, upgrading-react-native

Other

shadcn/ui — component patterns and composition (ui.shadcn.com/docs/skills)
ClickHouse — clickhouse-best-practices
Supabase — postgres-best-practices
Replicate — discover, compare, run AI models
Typefully — social media publishing across X, LinkedIn, Threads, Bluesky, Mastodon
Courier — multi-channel notifications (email, SMS, push, chat)
Composio — 850+ SaaS app integrations (see app-automation)