# Building a Floating AI Assistant That Lives in the Corner of Your Screen

> Source: <https://dev.to/hiyoyok/building-a-floating-ai-assistant-that-lives-in-the-corner-of-your-screen-1l8k>
> Published: 2026-06-14 02:25:30+00:00

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All tests run on an 8-year-old MacBook Air.

HiyokoHelper is a 360×440px floating window. Always accessible, never in the way. Cmd+Shift+H brings it to the front from any app.

```
{
  "app": {
    "windows": [{
      "label": "main",
      "width": 360,
      "height": 440,
      "resizable": false,
      "decorations": false,
      "alwaysOnTop": true,
      "transparent": true,
      "visible": false
    }],
    "macOS": {
      "activationPolicy": "accessory"
    }
  }
}
```

`decorations: false`

— custom title bar`alwaysOnTop: true`

— floats above everything`activationPolicy: accessory`

— no Dock, no Cmd+Tab`visible: false`

— hidden on launch

``` js
let shortcut: Shortcut = "CmdOrCtrl+Shift+H".parse()?;

app.global_shortcut().on_shortcut(shortcut, |app, _, _| {
    if let Some(window) = app.get_webview_window("main") {
        if window.is_visible().unwrap_or(false) {
            window.hide().unwrap();
        } else {
            window.show().unwrap();
            window.set_focus().unwrap();
        }
    }
})?;
```

Works from any app — VS Code, Terminal, Finder, anywhere.

```
.title-bar { -webkit-app-region: drag; }
.title-bar button { -webkit-app-region: no-drag; }
```

The title bar area drags. Buttons inside are clickable.

```
#[tauri::command]
pub fn hide_window(window: tauri::Window) {
    window.hide().unwrap();
    // Process stays alive
    // Clipboard monitor keeps running
    // Shortcut still works
}
tauri::Builder::default()
    .plugin(tauri_plugin_autostart::init(
        MacosLauncher::LaunchAgent,
        Some(vec!["--minimized"]),
    ))
```

Starts hidden at login. Ready for Cmd+Shift+H without ever appearing on screen.

**TL;DR:** Floating assistant window in Tauri: `decorations: false`

+ `alwaysOnTop: true`

+ `activationPolicy: accessory`

(no Dock/Cmd+Tab). Global shortcut toggles visibility from any app. `-webkit-app-region: drag`

for dragging without a native title bar. Close hides the window, not the process.

[HiyokoHelper (OSS)](https://github.com/Hiyokoko/HiyokoHelper) | X → [@hiyoyok](https://x.com/hiyoyok)