XBUSX — developer guide

This guide is a stub. Content is coming as the docs settle.

Things this guide will cover:

• Package layout — @emdzej/ikbus-protocol, -commands, ibusx-core, -devices, -transport-*.
• Citation conventions in the protocol reference (how to add or contest a claim).
• Implementing a new per-command codec.
• Building a Device twin with state + reflective controls.
• Wiring a custom transport (raw serial, Bluetooth, …).
• Building from source + running tests.

The docs/ tree in the repo is the canonical protocol reference.