Implementation

Prompty has runtime implementations in multiple languages. Each follows the same pipeline architecture but uses language-native patterns and package managers.

Language	Status	Package
Python	✅ Stable (alpha)	prompty on PyPI
TypeScript	✅ Stable (alpha)	@prompty/core on npm
C#	🚧 In Progress	—

Choosing a Runtime

All runtimes share the same .prompty file format — a prompt written for one runtime works with any other. The differences are in installation, API style, and available providers.

Python

• Most mature runtime with all features implemented
• Async support via _async variants of every function
• Entry-point-based plugin discovery
• Install: uv pip install prompty[all]

TypeScript

• Modular package architecture (@prompty/core + provider packages)
• Native async/await throughout
• Provider registration via side-effect imports
• Install: npm install @prompty/core @prompty/openai

C#

• Type system generated from TypeSpec schema
• Runtime pipeline in development
• Will follow the same four-stage architecture