Recover from invalid model output You let Ax validate fields and retry with specific correction feedback. Your app can still distinguish generation errors, provider failures, and cancellation. rust academy academy/topics/structured-validation-errors website/content-src/academy/course.mjs academy Recover from invalid model output
Unit 3 · Build a reliable AI-powered feature

Recover from invalid model output

You let Ax validate fields and retry with specific correction feedback. Your app can still distinguish generation errors, provider failures, and cancellation.

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Unit example (nearest native match)

See the idea in context

let answer = ax("question:string -> answer:string")?;
  1. Run the program normally

    Most valid responses return through the usual typed path.

  2. Catch the specific failure

    AxGenerateError identifies a generation or validation failure you can report deliberately.

  3. Preserve useful details

    error.details gives logs and UI a concrete repair target.

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/basic_generation.rs
Active practice

Show that you can use it

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