GitHub Copilot plugin for Godot 4.6.

• Godot 4.6
• Node.js ≥ 20.8 + NPM
• GitHub account with an active Copilot subscription

Install Node.js from https://nodejs.org/en/download/
On Debian/Ubuntu: apt install nodejs npm

Sign up for Copilot Free or check your access at https://github.com/settings/copilot

1. Download this repository as .zip and unpack it.
2. In your Godot project, create the folder res://addons/github_copilot/.
3. Copy all six files into that folder:

plugin.cfg
plugin.gd
copilot_manager.gd
copilot_overlay.gd
copilot_panel.gd
copilot_settings.gd

4. Open the Godot project.
5. Go to Project → Project Settings → Plugins and enable GitHub Copilot.

A Copilot tab will appear in the bottom panel.

1. Open the Copilot tab at the bottom of the editor.
2. Click Sign in with GitHub.
3. A device code (e.g. AB12-CD34) is shown and your browser opens github.com/login/device automatically.
4. Enter the code on that page and authorize the app.
5. The plugin polls GitHub every 3 seconds and signs in automatically once confirmed.

The session is remembered across Godot restarts — you will not need to sign in again unless you explicitly sign out or the token expires.

1. Open any .gd, .cs, or .glsl script in the editor.
2. Start typing — a ghost text suggestion appears after a short delay (default 0.65 s).
3. Press Tab to accept, Esc or any cursor key to dismiss.
4. Typing any character also dismisses the current suggestion and starts a new request.

Note: The autocomplete popup (Ctrl+Space) takes priority. If the native completion popup is visible, Tab will interact with it instead of accepting the Copilot suggestion.

Once signed in, the Copilot tab shows a Model dropdown. Click it to see all available completion models on your account. Select any model and it will be used immediately and saved for future sessions. Click ↺ to refresh the list.

Click the Settings tab in the bottom panel to configure:

Click Save Settings to persist. Settings are stored in user://copilot_settings.cfg.

"Node.js not found in PATH"
Install Node.js ≥ 20.8. On Windows, restart Godot after installing so the updated PATH is picked up.

"Timeout: LSP relay did not connect"
Click 📋 View Relay Log in the Settings tab to see the full output from the Node.js relay process. Common causes: npx is blocked by a firewall or proxy, or npm is not installed alongside Node.js.

Suggestion text overlaps existing code
The overlay draws on top of CodeEdit using a canvas child node. If your editor theme uses a non-standard background colour the erase rect may not match. Open the Settings tab, adjust the Ghost text color, and the background erase will use the theme's background_color automatically.

Suggestions stop appearing after switching scripts
This is usually a sign that the LSP lost track of the document. Switch away and back to the script to re-trigger textDocument/didFocus, or restart the plugin via Project Settings → Plugins (toggle off/on).

How to see the relay log file
Click 📋 View Relay Log in the Settings tab, or open the file directly:

• Linux/macOS: /tmp/copilot_relay.log
• Windows: %TEMP%\copilot_relay.log

The plugin uses a Node.js relay script to bridge Godot's TCP socket to the copilot-language-server stdio process. On first use, npx downloads the latest @github/copilot-language-server automatically. The relay script is written to the OS temp directory at runtime.

Ghost text is rendered by adding a Control node as the last child of CodeEdit so it paints on top of the editor's own text layer. For mid-line completions, the existing suffix text is erased and redrawn after the ghost text to prevent visual overlap.

All Node.js/LSP child processes are cleaned up on plugin unload via graceful LSP shutdown/exit messages followed by an OS-level kill on the relay PID, with a fuser -k fallback on Linux/macOS.