ProtoFast

A rapid prototyping playground for building LLM-assisted applications. ProtoFast provides a streamlined environment for quickly iterating on UI concepts and application flows with AI assistance.

ProtoFast is a boilerplate optimized for LLM-driven development. It's designed to help you quickly prototype applications by providing a flexible, moldable foundation that works seamlessly with AI coding assistants.

Key Principles:

• Focus on rapid iteration over production-readiness
• Human-readable mock data (JSON)
• No persistence by default - add only when needed
• Optimized codebase structure for LLM consumption and modification

Create a new ProtoFast project:

bunx create-react-router@latest --template jarle/proto-fast

Then start the development server:

bun run dev

Your application will be available at http://localhost:5173.

• Runtime: Bun.sh
• Framework: React Router v7
• Styling: TailwindCSS v4 + DaisyUI v5
• Icons: Lucide
• Language: TypeScript

This project includes an AGENTS.md file with instructions for LLMs working on your prototype. Key guidelines:

• Keep route pages under 150 lines by splitting into logical components
• Use proper type safety (no any types)
• Infer and derive types rather than casting
• Maintain an adr.md file for important design decisions

bun run typecheck
bun run build

ProtoFast is a playground, not a production template. Generate, iterate, and experiment freely. Add real functionality only when you're ready to move beyond prototyping.

Built for rapid prototyping with LLMs.