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

var sig = Ax.s("email:string -> priority:class \"high, normal, low\"");

Declare the source value
email is the string your application passes in.
List the result fields
The output side combines a string, an array, and a boolean.
Call it like a typed program
Ax uses this declaration to prompt, parse, and validate the response.

Run itIn your own project

// Gradle (build.gradle):
implementation 'dev.axllm:ax:24.0.15'
// Maven (pom.xml):
<dependency>
  <groupId>dev.axllm</groupId>
  <artifactId>ax</artifactId>
  <version>24.0.15</version>
</dependency>

import dev.axllm.ax.Ax;
import java.util.Map;

public class QuickStart {
  public static void main(String[] args) throws Exception {
    var llm = Ax.ai("openai", Map.of("apiKey", System.getenv("OPENAI_API_KEY")));
    var classify = Ax.ax("review:string -> sentiment:class \"positive, negative, neutral\"");
    var result = classify.forward(llm, Map.of(
      "review", "Useful and boring in the best way."
    ));

    System.out.println("sentiment: " + result.get("sentiment"));
  }
}

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 -- java src/examples/java/generation/StructuredGenerationExample.java

Active practice

Show that you can use it

Answer 2 in a row to learn this · attempt 1

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Source-backed follow-up