feat: deploy web app to GitHub Pages

.github/workflows/pages.yml

@@ -0,0 +1,64 @@
+# Build and deploy the web app to GitHub Pages.
+# Enable in repo: Settings → Pages → Source: GitHub Actions.
+# Site URL: https://<owner>.github.io/<repo>/
+
+name: Deploy Web App to GitHub Pages
+
+on:
+  push:
+    branches: ["main", "master"]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "lts/*"
+          cache: "npm"
+
+      - name: Install root dependencies
+        run: npm ci
+
+      - name: Prepare web app (index + skills)
+        run: npm run app:setup
+
+      - name: Install web-app dependencies
+        run: cd apps/web-app && npm ci
+
+      - name: Build web app for GitHub Pages
+        run: cd apps/web-app && npm run build
+        env:
+          VITE_BASE_PATH: /${{ github.event.repository.name }}/
+
+      - name: SPA fallback for client-side routes
+        run: cp apps/web-app/dist/${{ github.event.repository.name }}/index.html apps/web-app/dist/${{ github.event.repository.name }}/404.html
+
+      - name: Upload Pages artifact
+        uses: actions/upload-pages-artifact@3
+        with:
+          path: apps/web-app/dist
+
+  deploy:
+    needs: build
+    runs-on: ubuntu-latest
+    environment:
+      name: github-pages
+      url: ${{ steps.deploy.outputs.page_url }}
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deploy
+        uses: actions/deploy-pages@4

README.md

@@ -314,6 +314,8 @@ Counts change as new skills are added. For the current full registry, see [CATAL
 
 The web app is the fastest way to navigate a large repository like this.
 
+**Run locally:**
+
 ```bash
 npm run app:install
 npm run app:dev
@@ -321,6 +323,8 @@ npm run app:dev
 
 That will copy the generated skill index into `apps/web-app/public/skills.json`, mirror the current `skills/` tree into `apps/web-app/public/skills/`, and start the Vite development server.
 
+**Hosted on GitHub Pages:** The same app is deployed automatically on every push to `main`. Enable it once in the repo: **Settings → Pages → Build and deployment → Source: GitHub Actions**. The site will be available at `https://<owner>.github.io/antigravity-awesome-skills/`.
+
 ## Contributing
 
 - Add new skills under `skills/<skill-name>/SKILL.md`.

apps/web-app/src/App.tsx

@@ -5,7 +5,7 @@ import { BookOpen, Github } from 'lucide-react';
 
 function App(): React.ReactElement {
   return (
-    <Router>
+    <Router basename={import.meta.env.BASE_URL.replace(/\/$/, '') || '/'}>
       <div className="min-h-screen bg-slate-50 dark:bg-slate-950 text-slate-900 dark:text-slate-50">
         <header className="sticky top-0 z-50 w-full border-b border-slate-200 dark:border-slate-800 bg-white/80 dark:bg-slate-950/80 backdrop-blur supports-[backdrop-filter]:bg-white/60">
           <div className="container flex h-14 max-w-screen-2xl items-center mx-auto px-4">

apps/web-app/src/vite-env.d.ts

@@ -0,0 +1 @@
+/// <reference types="vite/client" />

apps/web-app/vite.config.ts

@@ -3,6 +3,16 @@ import react from '@vitejs/plugin-react';
 import refreshSkillsPlugin from './refresh-skills-plugin.js';
 
 // https://vite.dev/config/
+// VITE_BASE_PATH set in CI for GitHub Pages (e.g. /antigravity-awesome-skills/); default / for local dev
+const base = process.env.VITE_BASE_PATH ?? '/';
+const isGitHubPages = base !== '/';
+
 export default defineConfig({
+  base,
+  // For GitHub Pages, emit files under the base path so the artifact root maps to the site root
+  build: {
+    outDir: isGitHubPages ? `dist${base}` : 'dist',
+    emptyOutDir: true,
+  },
   plugins: [react(), refreshSkillsPlugin()],
 });