Describe inputs and outputs in one line You can describe an ordinary typed contract in one readable line. Inputs go before the arrow and outputs go after it. rust academy academy/topics/string-signatures website/content-src/academy/course.mjs academy Describe inputs and outputs in one line
ax
Rust axllm
TypeScript Python Java C++ Go Rust
Unit 2 · Make AI outputs predictable

Describe inputs and outputs in one line

You can describe an ordinary typed contract in one readable line. Inputs go before the arrow and outputs go after it.

ax()5 focused minutesNot started
Unit example (nearest native match)

See the idea in context

let sig = s("email:string -> priority:class \"high, normal, low\"")?;
  1. Declare the source value

    email is the string your application passes in.

  2. List the result fields

    The output side combines a string, an array, and a boolean.

  3. Call it like a typed program

    Ax uses this declaration to prompt, parse, and validate the response.

Run itIn your own project
cargo add axllm

use axllm::{ai, ax};
use serde_json::json;

let llm = ai("openai", json!({"apiKey": std::env::var("OPENAI_API_KEY")?}))?;
let classify = ax("review:string -> sentiment:class \"positive, negative, neutral\"")?;

Set OPENAI_APIKEY in your environment before running provider-backed code.

In the ax repo

From a clone of the ax repo:

npm run example -- rust src/examples/rust/generation/structured_generation.rs
Active practice

Show that you can use it

Answer 2 in a row to learn this · attempt 1
Keep exploring

Source-backed follow-up