Documentation

Welcome to the .prompt documentation. Here you'll find everything you need to get started and master the language.

Quick Links

• Getting Started - Set up and write your first .prompt file
• Language Reference - Complete syntax guide
• Types - Type system documentation
• Control Flow - if/elif/else, case, vary
• Fragments - Static and dynamic composition
• Response Contracts - Output schema definition
• Versioning - Semantic versioning for prompts
• API Reference - HTTP API endpoints

The One Rule

@ means variable. Always. Only. Everywhere.

Structural keywords (like init, if, case, end) never use @.

Example

init do
  @version: 1.0
  @major: 1

  params:
    @name: str
    @age: int

end init

Hello, @name! You are @age years old.

This compiles to a simple greeting with the variables replaced at runtime.