TOON Specification

The TOON specification has moved to a dedicated repository: github.com/toon-format/spec

Current Version

Version 3.0 (2025-11-24)

Quick Links

• Full Specification - Complete technical specification
• Changelog - Version history
• Examples - Example TOON files
• Conformance Tests - Language-agnostic test fixtures for implementations
• Contributing - How to propose spec changes

Why a Separate Repo?

The specification has been moved to toon-format/spec to:

• Provide a canonical, language-agnostic source of truth
• Enable independent versioning of spec and implementations
• Support the growing community of TOON implementations across multiple languages
• Facilitate collaboration on spec evolution through a dedicated RFC process

This Repository

This repository (toon-format/toon) remains the reference implementation in TypeScript/JavaScript. For specification discussions, issues, and contributions, please use the spec repository.