rx4 0.3.9

The agent harness engine — loop, tools, providers, sessions, permissions, computer-use
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# Rotary documentation

Rotary is the product name for the MPL-2.0 agent harness crate and CLI. The Rust crate and executable are both named `rx4`; use `rx4`, not `rotary`, in terminal commands.

```mermaid
flowchart LR
  Host["Product host"] --> Embed["Embed rx4 as a Rust dependency"]
  Host --> IPC["Connect to rx4 serve"]
  Embed --> Engine["Rotary agent harness"]
  IPC --> Engine
  Engine --> Capabilities["Loop, scopes, permissions, tools, sessions, skills"]
  Host --> Policy["UI, scheduling, provider policy"]
```

## Guides

- [Architecture](ARCHITECTURE.md) — module and agent-loop contracts.
- [Hosts](HOSTS.md) — embedding and IPC integration boundaries.
- [Comparison](COMPARISON.md) — scope relative to other harnesses.
- [Roadmap](ROADMAP.md) — completed capabilities and near-term work.

## Command contract

```bash
rx4 chat
rx4 exec "fix the failing test"
rx4 serve /tmp/rx4.sock
rx4 doctor
rx4 models
rx4 tools
```

Product hosts own scheduling and user experience. telekinesis owns pi protocol compatibility; Omi Desktop owns its desktop UI, local data policy, and provider-specific OAuth path.