Rust

This page is generated from the A2A Pack language SDK metadata.

Scaffold

a2a init math-agent --language rust

Implementation Contract

Implement the A2AAgent trait and call compile_agent / serve_agent.

pub struct MathAgent;

impl A2AAgent for MathAgent {
    fn definition(&self) -> AgentDefinition {
        AgentDefinition { name: "math-agent", description: "Math helper", version: "0.1.0" }
    }

    fn sum(&self, request: SumRequest) -> Result<SumResponse, String> {
        Ok(SumResponse { value: request.left + request.right })
    }
}

Local Commands

cargo run -- compile
cargo run -- worker

SDK Package

a2a-pack-rs vendored at third_party/a2a-pack-rs.

The compiled .a2a/agent.dsl.json is the sidecar contract. The sidecar owns public A2A, MCP, frontend, and invoke endpoints; the language SDK owns native handler execution through the worker protocol.