Add Ghostty extension

extensions/ghostty/.gitignore

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+node_modules/
+dist/
+*.log
+.DS_Store

extensions/ghostty/CHANGELOG.md

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+# Changelog
+
+## 0.1.0
+
+- Initial Vicinae extension for Ghostty on Linux.
+- Added commands for windows, tabs, workspaces, launch configurations, path opening, and config management.
+- Added Ghostty icon and Linux/KDE-focused tab support.

extensions/ghostty/LICENSE

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+MIT License
+
+Copyright (c) 2026 domainus
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

extensions/ghostty/README.md

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+# Ghostty for Vicinae
+
+Control [Ghostty](https://ghostty.org/) from Vicinae on Linux.
+
+## Commands
+
+- **New Ghostty Window** — opens a new Ghostty window.
+- **New Ghostty Tab** — focuses Ghostty and sends `Ctrl+Shift+T` to create a tab.
+- **Focus Ghostty Window** — lists visible Ghostty windows and focuses the selected one.
+- **Open Ghostty Launch Configuration** — runs saved YAML launch configurations.
+- **Open Ghostty Workspace** — scans a parent directory for Git repositories and opens one in Ghostty.
+- **Open with Ghostty** — opens a provided path in Ghostty.
+- **Manage Ghostty Config** — view, edit, validate, and open your Ghostty config file.
+
+## Requirements
+
+- Ghostty installed and available at `/usr/bin/ghostty`, or set the **Ghostty Binary** preference.
+- `wmctrl` for focusing Ghostty windows.
+- KDE/KWin `qdbus` plus `ydotool` for the **New Ghostty Tab** command on Wayland.
+
+Ghostty does not currently expose a stable Linux CLI action for creating a tab in an existing window. This extension therefore focuses Ghostty and sends the standard Ghostty new-tab shortcut (`Ctrl+Shift+T`). If that is not available, the command opens Ghostty and shows a failure toast.
+
+## Launch configurations
+
+Launch configurations are YAML files stored in:
+
+```text
+~/.config/vicinae/ghostty-launch-configs
+```
+
+Example:
+
+```yaml
+name: dev
+windows:
+  - tabs:
+      - title: Shell
+        cwd: ~/Developer/my-project
+        commands:
+          - pwd
+          - git status
+```
+
+Commands in launch configurations are executed in Ghostty with `&&`. Only use launch configurations you trust.
+
+## Preferences
+
+- **Workspaces Parent Directory** — parent directory to scan for Git repositories. Defaults to `~/Developer`.
+- **Workspace Scan Depth** — maximum depth for repository scanning.
+- **Ghostty Binary** — path to the Ghostty executable.
+
+## Notes
+
+The window focus command uses `wmctrl`, which may be limited on some Wayland compositors. KDE Plasma works best because the tab command can use KWin scripting to focus Ghostty before sending the shortcut.