feat: SQL Chess app with CI/CD and GitHub Pages deployment

Agent-Logs-Url: https://github.com/Devn913/SQL_Chess/sessions/7d3c4bc6-6bdd-46e2-bbed-6cd03df4f2f9

Co-authored-by: Devn913 <56478595+Devn913@users.noreply.github.com>

Author: Copilot

.github/workflows/deploy.yml

@@ -0,0 +1,63 @@
+name: CI / Deploy to GitHub Pages
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  # ── Validate ─────────────────────────────────────────────────
+  validate:
+    name: Validate HTML & JS
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+
+      - name: Install validators
+        run: npm install -g html-validate
+
+      - name: Validate HTML
+        run: html-validate index.html
+
+  # ── Deploy (only on push to main) ────────────────────────────
+  deploy:
+    name: Deploy to GitHub Pages
+    needs: validate
+    if: github.event_name == 'push' && github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Configure GitHub Pages
+        uses: actions/configure-pages@v4
+
+      - name: Upload Pages artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          # Deploy everything in the repo root
+          path: '.'
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.gitignore

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+# Dependencies installed locally (vendored copy in /vendor is committed)
+node_modules/
+package-lock.json
+
+# OS artefacts
+.DS_Store
+Thumbs.db
+
+# Editor / IDE
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# Logs
+*.log

.htmlvalidate.json

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+{
+  "extends": ["html-validate:recommended"],
+  "rules": {
+    "no-inline-style": "off",
+    "svg-focusable": "off",
+    "long-title": "off"
+  }
+}

README.md

@@ -1 +1,67 @@
-# SQL_Chess
+# ♟ SQL Chess
+
+> Play chess — and watch every move translated into real SQL queries in real time.
+
+[![Deploy to GitHub Pages](https://github.com/Devn913/SQL_Chess/actions/workflows/deploy.yml/badge.svg)](https://github.com/Devn913/SQL_Chess/actions/workflows/deploy.yml)
+
+**Live demo:** https://devn913.github.io/SQL_Chess/
+
+---
+
+## Features
+
+| Feature | Details |
+|---|---|
+| ♟ **Fully playable chess** | All rules enforced via [chess.js](https://github.com/jhlywa/chess.js) — en passant, castling, pawn promotion, check/checkmate/stalemate |
+| ⬡ **SQL Panel** | Every move generates real `INSERT`, `UPDATE`, `DELETE` SQL statements with syntax highlighting |
+| □ **Toggle SQL** | Hide the SQL panel to play as a traditional chess board |
+| 👤 **Guest mode** | No login required — just open the page and play |
+| ⇗ **Invite link** | Click "Invite" to generate a shareable URL that encodes the full game state — anyone who opens it continues the same game |
+| ⇅ **Flip board** | Swap perspective between white and black |
+| ↩ **Undo** | Take back the last move |
+
+## How the SQL works
+
+Each game gets its own `game_id`. Three tables are used:
+
+```sql
+chess_game   -- one row per game (id, players, status, winner)
+chess_piece  -- one row per piece (position updated on every move)
+chess_move   -- one row per move (full audit log)
+```
+
+Example — white pawn e2 → e4:
+
+```sql
+INSERT INTO chess_move (game_id, move_number, color, piece_type, from_square, to_square, san)
+VALUES ('a1b2-c3d4-e5f6-g7h8', 1, 'white', 'pawn', 'e2', 'e4', 'e4');
+
+UPDATE chess_piece
+SET    position = 'e4'
+WHERE  game_id  = 'a1b2-c3d4-e5f6-g7h8'
+  AND  position = 'e2'
+  AND  color    = 'white';
+```
+
+## CI/CD
+
+The repository uses **GitHub Actions** (`.github/workflows/deploy.yml`):
+
+1. **Validate** — runs `html-validate` on every push/PR to `main`
+2. **Deploy** — automatically publishes the site to **GitHub Pages** on every push to `main`
+
+## Local development
+
+No build step required — it's a plain HTML/CSS/JS site.
+
+```bash
+# Clone and open
+git clone https://github.com/Devn913/SQL_Chess.git
+cd SQL_Chess
+# Open index.html in your browser, or serve with any static server:
+npx serve .
+```
+
+## License
+
+[MIT](LICENSE)