toon-format

Encode JSON structures into compact TOON format for LLM prompts.

8|1|Updated Jul 11, 2025
One-click install
npx skills add https://github.com/Consiliency/treesitter-chunker --skill toon-format
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: toon-format
Source: https://github.com/Consiliency/treesitter-chunker/tree/main/.ai-dev-kit/skills/toon-format
Command: npx skills add https://github.com/Consiliency/treesitter-chunker --skill toon-format

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

TOON provides a compact, human-readable encoding for JSON data to reduce token usage and improve LLM prompt efficiency.

Core Features & Use Cases

  • Token-efficient JSON: Converts JSON-like structures into a concise TOON representation that preserves structure and semantics.
  • Structured data mastery: Suits tabular data, configuration blocks, and nested objects used in prompts and data pipelines.
  • Guided usage: References a set of formatting rules and validation tools to ensure consistent, machine-friendly data encoding.

Quick Start

Encode a simple object to TOON: name: Alice, role: Engineer

Frequently Asked Questions about toon-format

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I reduce token usage in LLM prompts with JSON data?

TOON encodes JSON into a compact, human-readable format that reduces token consumption while preserving data structure. It's designed for structured data like tables, configurations, and nested objects in AI workflows.

What's the best way to encode structured data for efficient prompting?

TOON applies formatting conventions and tabular data rules to convert JSON-like structures into concise representations. This encoding maintains semantic meaning while minimizing tokens needed to transmit the data.

Can I use TOON format for nested objects and configuration blocks?

Yes. TOON handles nested objects through explicit array representations and formatting conventions. It supports tables, configurations, and complex nested structures commonly used in prompts and data pipelines.

When should I use token-efficient encoding instead of standard JSON?

Use TOON when passing structured data through LLM prompts where token limits matter or cost is a concern. It's particularly effective for tabular data, API responses, and configuration objects that repeat across multiple prompts.

Does encoding JSON with TOON preserve data accuracy and structure?

TOON preserves structure and semantics through explicit formatting rules and validation conventions. The compact representation remains machine-friendly and human-readable while maintaining the original data relationships.