KX-Bridge-Release/NOTICE.md

NOTICE

This repository contains code licensed under the GNU General Public License v3.0 (see LICENSE) and material that is not covered by that license. Read this file before forking, distributing, or building from source.

What is GPLv3-licensed

The original work in this repository:

• bridge/ — Bridge daemon, MQTT client, web UI, configuration loader, protocol implementation
• tools/ — extract_credentials, fetch_credentials utilities
• _archive/tools/kx_printer_emulator.py — printer emulator
• Dockerfile, docker-compose.yml, release.sh, build scripts
• Documentation files (README*, CHANGELOG*, _archive/RE/06_docs/*)
• kobra_x_orcaslicer_preset.zip — slicer profile derived from public OrcaSlicer presets, adapted for the Kobra X

You are free to use, modify and redistribute this code under the terms of GPLv3 — including for commercial purposes — provided downstream forks remain under GPLv3 and source is made available to recipients.

What is not GPLv3-licensed

The following items are third-party material, included here only for interoperability purposes as permitted under §69e UrhG (German Copyright Act; equivalent: EU Software Directive Art. 6, US fair-use for reverse engineering for interoperability):

• bridge/anycubic_slicer.crt and bridge/anycubic_slicer.key — TLS client certificate and private key extracted from Anycubic Slicer Next binaries. Copyright remains with Anycubic / their respective authors. Included solely to enable the bridge to authenticate against the LAN MQTT broker that runs on a Kobra X printer the end-user already owns. No ownership claim is made.

• MQTT protocol structures, payload formats and signature algorithms — reverse-engineered from Workbench.dll / cloud_mqtt.dll of the Anycubic Slicer Next application. The protocol itself is documented in _archive/RE/06_docs/ for transparency. Any reproduction of code or protocol details serves interoperability only.

• AMS material naming, slot numbering, GCode markers (EXCLUDE_OBJECT_*) — follow conventions established by Anycubic and the wider Klipper ecosystem; usage here is purely interoperability-driven.

What this means for forks

If you fork KX-Bridge:

1. You must keep this NOTICE.md and LICENSE file in your fork.
2. Your modifications and additions to the bridge code, UI, tools and docs inherit GPLv3 — they must be made available under the same license if you distribute them.
3. The third-party material listed above is not something you can relicense; it stays under the original (implicit) rights of its owners.
4. Removing the certificates and rebuilding them from your own Anycubic Slicer installation is the safest path for redistribution if you are unsure about the §69e situation in your jurisdiction.

Disclaimer

This project is independent, non-commercial reverse-engineering work. It is not affiliated with, endorsed by, or supported by Anycubic Technology Co., Ltd. or any of their subsidiaries.

All trademarks are property of their respective owners.