RRF G-code Language Server for vscode

A lightweight Language Server Protocol (LSP) extension for VS Code that provides rich language support for RepRapFirmware (RRF) G-code files.

Features

Currently, in version 0.1.0, this extension provides intelligent Hover Documentation:

• Hover over any valid G-code or M-code (e.g., G1, M563) to see its full title and description.
• Hover over Tool commands (e.g., T0, T-1) to see tool selection logic.
• Includes direct links to the official Duet3D documentation for deep dives.
• Smart validation: ignores invalid tool numbers (e.g., T50 or T-2).

Extension Settings

This extension contributes the following settings:

• rrfgcode.activateOnGenericGcode: Enable or disable LSP features for generic non RRF gcode files (enabled by default).

Known Issues

• Autocompletion is not yet implemented (planned for future releases).
• Strict syntax validation and error highlighting are currently limited.

License

This project is dual-licensed to respect the original content creators while keeping the software logic open-source.

Code License

Copyright © 2026 Remenod

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

Data License

The G-Code documentation data included in this project (server/data/*) is derived from the Duet3D Documentation.

• Original content © Duet3D.
• Licensed under the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0).
• The data has been parsed and transformed into JSON format by Remenod.