deskctl/skills/SKILL.md

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---
name: deskctl
description: Desktop control CLI for AI agents
allowed-tools: Bash(deskctl:*)
---
# deskctl
Desktop control CLI for AI agents on Linux X11. Provides a unified interface for screenshots, mouse/keyboard input, and window management with compact `@wN` window references.
## Core Workflow
1. **Snapshot** to see the desktop and get window refs
2. **Query / wait** using grouped `get` and `wait` commands
3. **Act** using refs, explicit selectors, or coordinates
4. **Repeat** as needed
## Quick Reference
### See the Desktop
```bash
deskctl snapshot # Screenshot + window tree with @wN refs
deskctl snapshot --annotate # Screenshot with bounding boxes and labels
deskctl snapshot --json # Structured JSON output
deskctl list-windows # Window tree without screenshot
deskctl screenshot /tmp/s.png # Screenshot only (no window tree)
deskctl get active-window # Currently focused window
deskctl get monitors # Monitor geometry
deskctl get version # deskctl version + backend
deskctl get systeminfo # Runtime-scoped diagnostics
deskctl wait window --selector 'title=Firefox' --timeout 10
deskctl wait focus --selector 'class=firefox' --timeout 5
```
### Click and Type
```bash
deskctl click @w1 # Click center of window @w1
deskctl click 500,300 # Click absolute coordinates
deskctl dblclick @w2 # Double-click window @w2
deskctl type "hello world" # Type text into focused window
deskctl press enter # Press a key
deskctl hotkey ctrl c # Send Ctrl+C
deskctl hotkey ctrl shift t # Send Ctrl+Shift+T
```
### Mouse Control
```bash
deskctl mouse move 500 300 # Move cursor to coordinates
deskctl mouse scroll 3 # Scroll down 3 units
deskctl mouse scroll -3 # Scroll up 3 units
deskctl mouse drag 100 100 500 500 # Drag from (100,100) to (500,500)
```
### Window Management
```bash
deskctl focus @w2 # Focus window by ref
deskctl focus 'title=Firefox' # Focus by explicit title selector
deskctl focus 'class=firefox' # Focus by explicit class selector
deskctl focus "firefox" # Fuzzy substring match (fails on ambiguity)
deskctl close @w3 # Close window gracefully
deskctl move-window @w1 100 200 # Move window to position
deskctl resize-window @w1 800 600 # Resize window
```
### Utilities
```bash
deskctl doctor # Diagnose X11, screenshot, and daemon health
deskctl get-screen-size # Screen resolution
deskctl get-mouse-position # Current cursor position
deskctl launch firefox # Launch an application
deskctl launch code -- --new-window # Launch with arguments
```
### Daemon
```bash
deskctl daemon start # Start daemon manually
deskctl daemon stop # Stop daemon
deskctl daemon status # Check daemon status
```
## Global Options
- `--json` : Output as structured JSON (all commands)
- `--session NAME` : Session name for multiple daemon instances (default: "default")
- `--socket PATH` : Custom Unix socket path
## Output Contract
- Prefer `--json` when an agent needs strict parsing.
- Use `window_id` for stable targeting inside a live daemon session.
- Use `ref_id` / `@wN` for quick short-lived follow-up actions after `snapshot` or `list-windows`.
- Structured JSON failures expose machine-usable `kind` values for selector and wait failures.
- The exact text formatting is intentionally compact but not the parsing contract. See `docs/runtime-output.md` for the stable field policy.
## Window Refs
After `snapshot` or `list-windows`, windows are assigned short refs:
- `@w1` is the topmost (usually focused) window
- `@w2`, `@w3`, etc. follow z-order (front to back)
- Refs reset on each `snapshot` call
- Use `--json` to see stable `window_id` values for programmatic tracking within the current daemon session
## Selector Contract
Prefer explicit selectors when an agent needs deterministic targeting:
```bash
ref=w1
id=win1
title=Firefox
class=firefox
focused
```
Bare selectors such as `firefox` still work as fuzzy substring matches, but they now fail with candidate windows if multiple matches exist.
## Example Agent Workflow
```bash
# 1. See what's on screen
deskctl snapshot --annotate
# 2. Wait for the browser and focus it deterministically
deskctl wait window --selector 'class=firefox' --timeout 10
deskctl focus 'class=firefox'
# 3. Navigate to a URL
deskctl hotkey ctrl l
deskctl type "https://example.com"
deskctl press enter
# 4. Take a new snapshot to see the result
deskctl snapshot
```
## Key Names for press/hotkey
Modifiers: `ctrl`, `alt`, `shift`, `super`
Navigation: `enter`, `tab`, `escape`, `backspace`, `delete`, `space`
Arrows: `up`, `down`, `left`, `right`
Page: `home`, `end`, `pageup`, `pagedown`
Function: `f1` through `f12`
Characters: any single character (e.g. `a`, `1`, `/`)