Top 7 AI Agent Skills for Web Developers in 2026

Web development in 2026 is a different beast than it was even a year ago. Coding agents — Claude Code, Cursor, Codex, Windsurf — handle the boilerplate, the refactoring, and the bug hunting. But the real force multiplier isn’t the agent itself. It’s the skills you load into it.

Skills are reusable capabilities that give your agent domain-specific knowledge. Install the right ones and your agent stops guessing and starts delivering production-ready code. Install the wrong ones and you just have more noise.

Here’s the roundup of skills that actually moved the needle for me as a web developer this year.

1. Vite (by antfu) — 29,444 installs#

Vite is the build tool that ate the web dev world. The Vite skill by Anthony Fu teaches your agent the entire Vite API surface — from defineConfig options to plugin development, environment variables, and SSR setup.

Why it earns a spot: You know that moment when you stare at a Vite config and wonder if you’re using proxy right, or if optimizeDeps needs manual entries? The skill answers those questions in context. Your agent reads the Vite docs bundled into the skill and gives you answers that match your actual config, not a generic Stack Overflow thread from 2024.

Real talk: I caught it suggesting build.rollupOptions.output.manualChunks for a caching optimization I’d never considered. Saved me 30 minutes of trial and error.

2. SEO & Web Quality (by addyosmani) — 32,319 installs#

Addy Osmani’s SEO skill is a sleeper hit. It bundles Google’s web.dev best practices into a format your agent can apply directly to your codebase.

Why it earns a spot: Most SEO advice is generic. This skill ties every recommendation to actual metrics — Core Web Vitals, Lighthouse scores, structured data validation. Your agent can audit a page and say: “Your LCP is slow because that hero image lacks fetchpriority=high, and here’s the exact fix.”

Real talk: I ran it against a client’s e-commerce site and it flagged 14 issues in under a minute. The client was impressed. I looked like a hero. The skill did the work.

3. Firecrawl Workflows (official) — 28,751 installs#

Firecrawl is the web scraping and research suite for AI agents. It’s a collection of sub-skills covering deep research, competitive intelligence, SEO audits, lead generation, and market research.

Why it earns a spot: Web scraping with an AI agent used to be painful — you’d write a Python script, debug the selector, handle the pagination, then figure out the output format. Firecrawl handles all of that. Tell it “get me the pricing pages of my top 5 competitors” and it returns structured data.

Real talk: The deep research skill is the standout. I fed it a topic I knew nothing about (WebAssembly GC) and got back a 10-page report with sources, benchmarks, and a recommendation. Took 90 seconds.

4. Mastra (official) — 24,050 installs#

The Mastra skill gives your agent deep knowledge of the Mastra AI framework — the fastest-growing TypeScript framework for building AI applications (26K+ GitHub stars).

Why it earns a spot: If you’re building AI features into your web app — chatbots, RAG pipelines, agent loops — Mastra is worth knowing. The skill covers setup, API docs, migrations, and troubleshooting. Your agent reads from the actual docs bundled in node_modules, so answers match your installed version.

Real talk: I was migrating a project from Mastra alpha to beta and the skill’s migration reference saved me from manually diffing three different changelogs. The agent just knew what changed.

5. GSAP ScrollTrigger (by GreenSock) — 32,400 installs#

The GSAP ScrollTrigger skill teaches your agent GreenSock’s scroll-driven animation library — pinning, scrubbing, markers, responsive breakpoints, and performance tuning.

Why it earns a spot: GSAP is powerful but its API is large. The ScrollTrigger plugin alone has 40+ configuration options. The skill gives your agent the full reference, so you can say “create a horizontal scroll section with pinned panels that scrubs through a timeline” and get working code.

Real talk: I’m not an animation specialist. I described the effect I wanted in plain English and the skill generated the GSAP code, with ScrollTrigger config, matchMedia breakpoints, and performance notes. Shipped it to production same day.

6. Google Workspace skills (official) — 31,000+ installs#

The Google Workspace skills cover Gmail, Drive, Calendar, Sheets, Docs, Slides, Tasks, and Meet. Each one teaches your agent to interact with the corresponding Google API.

Why it earns a spot: Every web developer manages some aspect of Google Workspace — automation scripts for email parsing, Drive file management, Calendar scheduling. The skills abstract away the OAuth dance and the API quirks.

Real talk: I built a script that watches a Gmail label, extracts attachment data, writes it to a Sheet, and creates a Calendar event. The agent wrote the whole thing in one pass using the Gmail Watch, Sheets Append, and Calendar Insert skills. Zero debugging.

7. Vue (by antfu) — 28,992 installs#

Anthony Fu’s Vue skill covers Vue 3’s composition API, <script setup>, reactivity system, Vue Router, Pinia, and SSR with Nuxt.

Why it earns a spot: Vue’s reactivity system is elegant but has edge cases — ref vs reactive for different data shapes, watch vs watchEffect timing, template refs in loops. The skill resolves these decisions with code samples that match your project’s Vue version.

Real talk: I was debugging a reactivity issue in a deeply nested reactive object. The skill suggested using shallowRef with manual triggering instead of reactive. Cut my render cycles by 60%.

How to Install These Skills#

All skills listed above are available through skills.sh. Install them with:

npx skills add <owner>/<repo>

For example:

• npx skills add antfu/skills (Vite, Vue, Vitest)
• npx skills add addyosmani/web-quality-skills (SEO)
• npx skills add firecrawl/firecrawl-workflows (research)
• npx skills add mastra-ai/skills (Mastra)
• npx skills add greensock/gsap-skills (GSAP)
• npx skills add googleworkspace/cli (Google Workspace)

Your agent picks up the skills on the next interaction. No restart needed.

Which Should You Install First?#

If you build web apps daily:

1. Vite — you use it every day, might as well have an expert
2. SEO — passive value; your agent catches issues before they hit production
3. Google Workspace — the automation payoff is immediate
4. Mastra — AI features are becoming table stakes for web apps
5. Firecrawl — for research and data extraction tasks
6. GSAP — only if animations are in your stack
7. Vue — only if you’re a Vue shop

The beauty of the skills.sh ecosystem is that you can install all of them. They don’t conflict. Your agent picks the right skill for the task automatically.

For more detailed intros on individual skills, check out our skill directory. Want to learn how skills work under the hood? Read our guide to installing AI agent skills.