The Open, Minimalist Coding-Agent Harness

// Editor (Zed / Cursor) sends initialize request over stdio
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "initialize",
  "params": {
    "protocolVersion": 1,
    "clientInfo": { "name": "zed", "version": "0.175.0" },
    "capabilities": { "roots": { "listChanged": true } }
  }
}

// Zene server responds with session ID and supported tools
{
  "jsonrpc": "2.0",
  "id": 1,
  "result": {
    "protocolVersion": 1,
    "serverInfo": { "name": "zene-acp", "version": "0.1.16" }
  }
}

use zene_core::{Agent, Result};

#[tokio::main]
async fn main() -> Result<()> {
    // Initialize zero-boilerplate headless agent in current workspace
    let agent = Agent::core(".").await?;

    // Execute turn loop with prefix-cached context projection
    let response = agent.step("Analyze workspace architecture and report crate boundaries").await?;
    println!("{response}");

    Ok(())
}

{
  "model": "anthropic/claude-3-7-sonnet-latest",
  "api_base": "https://api.anthropic.com/v1",
  "context": {
    "auto_compact": true,
    "prefix_caching": true,
    "max_tokens": 200000
  },
  "sandbox": {
    "mode": "Default",
    "timeout_seconds": 60
  }
}