Trust the
whole run.

use runifold::ProviderModelExt;
use runifold_providers::openai::OpenAiClient;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let runtime = OpenAiClient::from_api_key(
        std::env::var("OPENAI_API_KEY")?
    )?.runtime("gpt-5")?;

    let answer = runtime
        .agent("assistant")
        .system("Answer precisely. Expose uncertainty.")
        .prompt_text("Why is durable execution useful?")
        .await?;

    println!("{answer}");
    Ok(())
}