> ## Documentation Index
> Fetch the complete documentation index at: https://docs.askui.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Capabilities

> A unified overview of all AgentOS capabilities across control modes and runtime modes.

AgentOS provides a set of capabilities for controlling machines. What's available depends on the [control mode](/06-agent-os/understanding/control-modes) and [runtime mode](/06-agent-os/understanding/runtime-modes) you use.

## Desktop Control

| Capability                  | Host Mode | Companion Mode                      | Description                                     |
| --------------------------- | --------- | ----------------------------------- | ----------------------------------------------- |
| Screenshots                 | Available | Available (via HDMI capture)        | Capture the current screen state.               |
| GPU-accelerated screenshots | Available | —                                   | Take screenshots on GPU for better performance. |
| Keyboard input              | Available | Available (via USB / Bluetooth HID) | Simulate key presses and combinations.          |
| Real Unicode typing         | Available | —                                   | Native Unicode input (not clipboard-based).     |
| Mouse input                 | Available | Available (via USB / Bluetooth HID) | Click, move, drag, and scroll.                  |
| Multi-display support       | Available | —                                   | Interact with multiple monitors.                |
| Window management           | Available | —                                   | Select, resize, move, and focus windows.        |
| Process management          | Available | —                                   | Start, stop, and monitor OS processes.          |
| Automation recovery         | Available | —                                   | Recover automatically from display changes.     |
| CLI                         | Available | —                                   | Enhanced command-line interface.                |

## Windows Service (OS Service Mode Only)

These capabilities require AgentOS to be installed as a [Windows service](/06-agent-os/installation/service).

| Capability                    | Status    | Description                                           |
| ----------------------------- | --------- | ----------------------------------------------------- |
| SYSTEM-level service          | Available | Run as a Windows service with SYSTEM privileges.      |
| RDP disconnect recovery       | Available | Keep automation running when RDP sessions disconnect. |
| Login screen automation       | Available | Interact with the Windows logon screen.               |
| Secure Attention Sequence     | Available | Send CTRL+ALT+DEL programmatically.                   |
| Background session automation | Available | Automate sessions that are not in the foreground.     |
| Multi-user session control    | Planned   | Control multiple user sessions on the same machine.   |
| Virtual display               | Planned   | Create virtual displays for headless environments.    |

## Mobile Devices

| Capability    | Status       | Description                          |
| ------------- | ------------ | ------------------------------------ |
| ADB (Android) | Available    | Control Android devices via USB.     |
| IDB (iOS)     | Experimental | Control iOS Simulators (macOS only). |

## Hardware (Companion Mode Only)

| Capability                  | Status    | Description                                             |
| --------------------------- | --------- | ------------------------------------------------------- |
| HID over USB                | Available | Simulate keyboard and mouse via USB connection.         |
| HID over Bluetooth          | Available | Simulate keyboard and mouse via Bluetooth.              |
| Screenshot via media stream | Available | Capture screen output via HDMI-to-USB dongle or webcam. |
| Raspberry Pi support        | Planned   | Use a Raspberry Pi as the companion device.             |

## Platform Support

| Platform             | Host Mode | Companion Mode                      |
| -------------------- | --------- | ----------------------------------- |
| Windows 10 22H2+     | Available | —                                   |
| Windows 11           | Available | —                                   |
| Windows Server 2019+ | Available | —                                   |
| Windows 10 \< 22H2   | Available | —                                   |
| macOS                | Available | —                                   |
| Linux                | Available | —                                   |
| Android              | —         | Available (ADB)                     |
| iOS                  | —         | Experimental (IDB, Simulators only) |

## Future

| Capability             | Status  | Description                                         |
| ---------------------- | ------- | --------------------------------------------------- |
| C# API                 | Planned | Native C# interface for .NET integrations.          |
| Future automation APIs | Planned | Integration with emerging OS automation frameworks. |