# Cua — Inside Linux computer-use: AT-SPI, XTEST, and background agents

- Company: Cua (cua.ai)
- Announced: 2026-06-18
- Category: developer-tool-release
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://cua.ai/blog/inside-linux-computer-use
- Record: https://forck.live/items/16820-inside-linux-computer-use-at-spi-xtest-and-background-agents
- Subject: Cua Driver / Lume / Cua Bench / Cua Fleets

Cua Driver 0.5.7 adds background computer-use for Linux desktop apps, using AT-SPI 2 over D-Bus for the accessibility tree and XTEST for input synthesis, with a painted agent cursor kept separate from the physical pointer. The supported backend is X11 and XWayland, with native Wayland in preview behind an opt-in flag. It is available today for any agent over MCP or the CLI, tested on Debian 12, Ubuntu 22.04, Ubuntu 24.04, Rocky 9, and Fedora 41.

## Evidence

Verbatim from https://cua.ai/blog/inside-linux-computer-use:

> It uses AT-SPI 2 over D-Bus for the accessibility tree, XTEST for input synthesis, and a painted agent cursor kept separate from your physical pointer.

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Record: https://forck.live/items/16820-inside-linux-computer-use-at-spi-xtest-and-background-agents
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