"Paste your code, get roasted, walk away with the fix."
Built with Google Antigravity 2.0, Google Stitch MCP, Gemini 3.5 Flash-Lite, Next.js 15 App Router, and Tailwind CSS v4.
Specially crafted for GDG on Campus MET & Pre-DevFest Nashik 2026.

Live Demo: avcoe-code-roaster-ivory.vercel.app

Code Roaster (Desi Edition) pairs technical code review with humorous, punchy Indian-dev commentary (Hinglish/Marathi slang + spicy developer metaphors). It detects real bugs, classifies them into FATAL BUG, CODE SMELL, and OPTIMIZATION, delivers a comedic critique across 3 intensity levels (Dry, Sharp, Savage), and gives you clean, corrected code with 1-click Apply to Editor.

Before starting, ensure you have:

1. Node.js: v18.18+ or v20+ installed (Download Node.js).
2. Git: Installed and configured on your system (Download Git).
3. Google Account: For Google AI Studio and Google Stitch.
4. GitHub Account: For version control.
5. Vercel Account: For deploying your live application.

1. Install Google Antigravity IDE:

   • Download and set up the Google Antigravity 2.0 IDE.
   • Launch Antigravity and open an empty folder or your project workspace.

2. Generate a Google Stitch API Key:

   • Visit the Google Stitch platform.
   • Head over to your profile/developer settings and create a new Stitch API Key.
   • Copy and save this key securely.

Antigravity connects directly to Model Context Protocol (MCP) servers to interact with external tools like Stitch.

1. In Antigravity, open the MCP Servers panel (Settings -> MCP Servers or click the MCP icon in the activity bar).
2. Locate or add Google Stitch MCP (StitchMCP).
3. Add your Stitch API Key in the configuration settings:

   {
     "mcpServers": {
       "StitchMCP": {
         "command": "stitch-mcp",
         "env": {
           "STITCH_API_KEY": "<YOUR_STITCH_API_KEY>"
         }
       }
     }
   }

4. Verify that Stitch MCP connects successfully (status indicator will show green/active).

The repository includes a comprehensive design system specification in prompts/designGDGmain.md (or designGDGmain.md), specifying color palettes, neo-brutalist typography, layout rules, and DevFest Nashik branding.

1. In Antigravity's chat interface, attach the design file:
   • Type @prompts/designGDGmain.md (or @designGDGmain.md).
2. Run the following prompt:

using this skill, generate a wireframe for me inside of google stitch using its mcp. Make sure to use the assests from the assest folders for logos and svgs

3. What happens:
   • Antigravity calls the Stitch MCP tools (create_project, create_design_system, generate_screen_from_text).
   • It creates a dedicated project and generates the high-fidelity wireframe screen inside Stitch.
   • Wait until Stitch returns the completed screen URL and visual preview.

Now convert the wireframe and specifications into a full-stack Next.js project using Antigravity.

1. Attach the build prompt file:
   • Type @prompts/02-antigravity-build-prompt.md (or @02-antigravity-build-prompt.md).
2. Run the following prompt:

using this context, create the project and use our generated wireframe that we just built as the main design. You can also extract its code from stitch as the reference for your code

3. What happens:
   • Antigravity reads the wireframe code and architecture prompt.
   • It scaffolds the Next.js project with App Router, TypeScript, and Tailwind CSS v4.
   • It writes the core application modules:
     • config/app.config.ts: App constants, roast levels, language list, and limits.
     • types/roast.ts: Strict TypeScript interfaces for roast payloads.
     • lib/prompt.ts: Desi persona system prompt and Hinglish instructions.
     • lib/schema.ts: Strict JSON schema for Gemini structured responses.
     • lib/gemini.ts: Robust @google/genai caller with retry backoff.
     • app/api/roast/route.ts: Secure server-side validation and endpoint.
     • components/*: Workspace, CodeEditor, RoastReport, IssueCard, FixedCode, etc.

Code Roaster needs access to Gemini to roast code.

1. Obtain your API Key for free:
   • Visit Google AI Studio.
   • Sign in with your Google account and click Create API Key.
2. Add to .env.local:
   • In your project root, create a file named .env.local (or copy .env.example):

     cp .env.example .env.local

   • Open .env.local and paste your key:

     GEMINI_API_KEY=your_actual_gemini_api_key_here

⚠️ Important: Never commit .env.local to Git! It is already added to .gitignore.

1. Open GitHub.
2. Create a new repository (e.g., code-roaster or code-roaster-gdg).
3. Set the repository to Public.
4. Leave Initialize this repository with a README unchecked (we already have our code).
5. Copy your repository's remote URL:

   https://github.com/<YOUR_USERNAME_OR_ORG>/code-roaster.git
   

1. Test the app locally: Open your terminal in the project directory and run:

   # Install dependencies
   npm install
   
   # Start development server
   npm run dev

2. Open http://localhost:3000 in your browser:

   • Click Load Sample Bug or paste your own broken code.
   • Select a Roast Level (Dry, Sharp, or Savage).
   • Hit Roast Me / भाजून काढ 🔥 (or press Ctrl + Enter).
   • Verify the roast comments, issue breakdown, and corrected code.

3. Commit and push using Antigravity: In Antigravity's chat, give the following command:

initialize a git repository here and commit + push the changes to this remote https://github.com/<YOUR_USERNAME_OR_ORG>/code-roaster.git

(Replace the URL with your copied GitHub repository link).

Or run manually in your terminal:

git add .
git commit -m "feat: complete Code Roaster Desi Edition with Stitch & Gemini"
git branch -M main
git remote remove origin
git remote add origin https://github.com/<YOUR_USERNAME_OR_ORG>/code-roaster.git
git push -u origin main

1. Go to Vercel and sign in with GitHub.
2. Click Add New... -> Project.
3. Under Import Git Repository, find and select your code-roaster repository.
4. In the Configure Project screen:
   • Framework Preset: Next.js
   • Root Directory: ./
5. Expand Environment Variables:
   • Key: GEMINI_API_KEY
   • Value: (Paste your Gemini API key from Google AI Studio)
   • Click Add.
6. Click Deploy.
7. In under a minute, your spicy Code Roaster app is live on a .vercel.app URL! 🎉

• Agentic IDE: Google Antigravity 2.0
• Design & Wireframing Engine: Google Stitch MCP
• Framework: Next.js 15 (App Router, Server Actions / Route Handlers)
• UI & Components: React 19 + TypeScript
• Styling: Tailwind CSS v4 (Neo-brutalist technical drafting aesthetics, Warli geometric accents, Space Grotesk + JetBrains Mono fonts)
• AI Intelligence: Google Gemini API via official @google/genai SDK (gemini-3.5-flash-lite)
• Deployment: Vercel

┌────────────────────────────────────────────────────────┐
│                   Google Antigravity 2.0               │
│                                                        │
│  [Prompts] ─────────► [Stitch MCP] ─────► Wireframe    │
│  - designGDGmain.md        │                           │
│  - build-prompt.md         ▼                           │
│                     [Next.js App]                      │
│                            │                           │
│                            ▼                           │
│                   [Gemini 3.5 Flash]                   │
│               (Hinglish Roasts + Fixes)                │
└────────────────────────────┬───────────────────────────┘
                             │
                             ▼
                    [GitHub] ──► [Vercel]

├── .env.example                 # Environment variables template
├── 02-antigravity-build-prompt.md # Complete end-to-end prompt for Antigravity
├── designGDGmain.md             # Complete Stitch design system & style tokens
├── app/
│   ├── layout.tsx               # Root layout with Space Grotesk & JetBrains Mono fonts
│   ├── page.tsx                 # Main page entry point
│   ├── globals.css              # Neo-brutalist utilities, drafting grid, theme colors
│   └── api/
│       └── roast/
│           └── route.ts         # Secure Next.js API route validating inputs
├── components/
│   ├── Workspace.tsx            # Main state orchestrator (code, language, reports)
│   ├── TopBar.tsx               # DevFest Nashik branded header & quick links
│   ├── RoastControls.tsx        # Language selector, roast intensity pill switches
│   ├── CodeEditor.tsx           # Line gutters, error highlighting, sample loader
│   ├── RoastReport.tsx          # Render container for roasts and fixes
│   ├── IssueCard.tsx            # Severity badges (Fatal Bug, Code Smell, Optimization)
│   ├── FixedCode.tsx            # Diff view, copy-to-clipboard, apply-to-editor
│   ├── ErrorMessageInput.tsx    # Collapsible drawer for stack traces
│   ├── StatusBar.tsx            # Status ticker, character count, ready indicator
│   └── EmptyState.tsx           # Playful "{ ?_? }" awaiting submission card
├── config/
│   └── app.config.ts            # Central config for languages, models, and limits
├── lib/
│   ├── api.ts                   # Client-side fetch helper
│   ├── gemini.ts                # Google Gen AI SDK integration with retry backoff
│   ├── prompt.ts                # System instructions with Hinglish / Desi flavor
│   └── schema.ts                # Structured JSON schema for Gemini output
└── types/
    └── roast.ts                 # TypeScript type definitions

• Missing GEMINI_API_KEY: Ensure .env.local exists in the root directory and contains GEMINI_API_KEY=.... Restart npm run dev after changing environment variables.
• Stitch MCP Connection Issues: If Antigravity cannot connect to Stitch MCP, check that your STITCH_API_KEY is valid and that the MCP process is running under Settings -> MCP Servers.
• 429 Rate Limit on Gemini: Gemini Free Tier gives generous RPM. If you hit rate limits, wait 10 seconds or verify gemini-3.5-flash-lite in config/app.config.ts.
• Vercel Deployment: Make sure GEMINI_API_KEY is added to your Vercel Project Settings under Environment Variables.

• Organized by: Google Developer Group (GDG) Nashik & GDG on Campus MET
• Event: DevFest Nashik 2026 / Pre-DevFest AI Hands-on Workshop
• Special Thanks: Google Antigravity Team & Google Stitch Team for developer tools!

Happy Coding & Happy Roasting! 🔥
"कोड सुधारून घ्या, आधीच वेळ निघून गेली आहे!"