TOON (rustapi-extras toon feature)

Lens: “The Diplomat” Philosophy: “Optimizing for Silicon Intelligence.”

The rustapi-toon crate has been merged into rustapi-extras behind the toon feature flag. All functionality remains identical; only the import path has changed.

Enable the feature in your Cargo.toml:

[dependencies]
rustapi-rs = { version = "0.1", features = ["protocol-toon"] }

What is TOON?

Token-Oriented Object Notation is a format designed to be consumed by Large Language Models (LLMs). It reduces token usage by stripping unnecessary syntax (braces, quotes) while maintaining semantic structure.

Content Negotiation

The LlmResponse<T> type automatically negotiates the response format based on the Accept header.

#![allow(unused)]
fn main() {
async fn agent_data() -> LlmResponse<Data> {
    // Returns JSON for browsers
    // Returns TOON for AI Agents (using fewer tokens)
}
}

Token Savings

TOON often reduces token count by 30-50% compared to JSON, saving significant costs and context window space when communicating with models like GPT-4 or Gemini.