proto

proto is a pluggable next-generation version manager for multiple programming languages. A unified toolchain.

• Learn more
• Documentation
• Get started
• Supported tools

proto powers moon's toolchain!

Why use proto?

• Lightspeed! With Rust, we can guarantee exceptional performance.
• Multi-language. A single CLI for managing versions for all of your languages.
• Cross-platform, for a consistent experience across machines and teams.
• Contextual version detection, ensuring the correct version of a tool is always used.
• Checksum verification, ensuring a tool came from a trusted source.
• Detects and infers from a language's ecosystem for maximum compatibility.
• Pluggable architecture via WASM, enabling custom integrations.

Supported languages

• Bun
• Deno
• Go
• moon
• Node (and npm, pnpm, yarn)
• Python (and uv)
• Ruby
• Rust
• ... and more via plugins!

Contributors

Special thanks to the wonderful people who have contributed to this project: