Configuration

The Rust SDK keeps configuration close to the Autohand CLI contract. Most fields become CLI flags when the subprocess starts.

Basic Configuration

let config = Config::from_env()
    .with_cwd(".")
    .with_model("fantail2")
    .with_skill("rust")
    .with_instructions("Prefer safe, idiomatic Rust.");

Config::from_env() reads AUTOHAND_CLI_PATH when present.

Provider Credentials

Provider credentials are owned by the Autohand CLI, not the SDK. Configure them in ~/.autohand/config.json or through environment variables supported by the CLI.

{
  "provider": "openrouter",
  "openrouter": {
    "apiKey": "sk-or-...",
    "model": "openrouter/auto"
  }
}

Runtime Options

Common options:

• model: model override.
• temperature: sampling temperature.
• max_iterations: loop limit.
• max_runtime_minutes: wall-clock limit.
• max_cost: cost budget.
• context_compact: context compaction.
• additional_directories: extra workspace roots.
• skills: skills available to the agent.
• env: environment variables for the CLI subprocess.

System Prompts

Use with_instructions() or append_system_prompt for normal integrations. Replacing system_prompt means your host owns the full agent contract.

let config = Config::from_env()
    .with_instructions("Return concise findings with file references.");

Permissions

Use unrestricted only for trusted automation. For most applications, keep the default interactive behavior and respond to permission_request events.

sdk.set_permission_mode("interactive").await?;

Plan Mode

Plan mode is a runtime control:

sdk.set_plan_mode(true).await?;

See Plan Mode.