aisdk

Agents

Defining a Tool

Use the #[tool] macro to expose a Rust function as a callable tool.

use aisdk::core::Tool;
use aisdk::macros::tool;

#[tool]
/// Get the weather information given a location
pub fn get_weather(location: String) -> Tool {
    let weather = match location.as_str() {
        "New York" => 75,
        "Tokyo" => 80,
        _ => 70,
    };
    Ok(weather.to_string())
}

Using Tools in an Agent

Register tools with an agent so the model can call them during its reasoning loop.

use aisdk::core::{LanguageModelRequest, utils::step_count_is};
use aisdk::providers::OpenAI;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {

    let result = LanguageModelRequest::builder()
        .model(OpenAI::gpt_4o())
        .system("You are a helpful assistant.")
        .prompt("What is the weather in New York?")
        .with_tool(get_weather())
        .stop_when(step_count_is(3)) // Limit agent loop to 3 steps
        .build()
        .generate_text()
        .await?;

    println!("Response: {:?}", result.text());
    Ok(())
}

Prompts

The AISDK prompt feature provides, file-based template system for managing AI prompts using the Tera template engine. It allows you to create reusable prompt templates with variable substitution, conditionals, loops, and template inclusion. See Examples for more template examples. Enable with cargo add aisdk --features prompt

Roadmap

• [ ] Image Model Request Support
• [ ] Voice Model Request Support
• [ ] Observability & OpenTelemetry (OTel) Support

Contributing

We welcome contributions! Please see CONTRIBUTING.md for guidelines.

License

Licensed under the MIT License. See LICENSE for details.