Harness

A harness controls the agent loop that processes messages, calls tools, and returns results. Funky currently supports two harnesses:

Harness	Runtime type	Notes
Funky native	`native`	Funky’s built-in, provider-neutral agent loop
Claude Code	`claude-code`	Runs turns through the Claude Agent SDK and requires an Anthropic model

The Funky native harness is used when runtime is omitted. You can also select it explicitly:

{
  "runtime": {
    "type": "native"
  }
}

To use Claude Code, configure an Anthropic model and set the runtime type:

{
  "model": {
    "provider": "anthropic",
    "model": "claude-sonnet-5"
  },
  "runtime": {
    "type": "claude-code"
  }
}

Pi, Codex, and Antigravity harnesses are coming soon.