# XGRIDS / LixelKity K1 plugin

This directory is the package boundary for the first Mission Core device
plugin. It now owns the canonical v1alpha manifest
[`plugin.manifest.json`](plugin.manifest.json). The statically linked frontend
contribution lives in `apps/control-station/src/device-plugins/xgrids-k1/`; the
verified backend implementation remains temporarily in `src/k1link` so the
real-device path stays operational during extraction.

The v1alpha1 host deliberately assigns one model to one plugin runtime, so this
manifest exposes only `xgrids.lixelkity-k1`. Adding another device model means a
new plugin contribution until session/model routing lands in the next SDK.

The plugin owns:

- BLE discovery hints and K1 GATT metadata;
- the reviewed firmware-3 Wi-Fi provisioning profile;
- K1 LAN status and private-address validation;
- subscribe-only MQTT transport and report-topic allowlist;
- native `.k1mqtt` capture;
- firmware-scoped protobuf/LZ4 and legacy codecs;
- normalization of K1 point cloud, pose, status, health, and artifacts;
- K1-specific operator instructions and compatibility tests.

The plugin does not own:

- Mission Core navigation, fleet, missions, users, roles, or audit;
- the generic spatial scene or Rerun Web Viewer;
- platform storage, remote transport, or other devices.

Until extraction is complete, `src/k1link` is the compatibility source of
truth and every move into this package must preserve replay and real-device
acceptance.

Mission Core imports this plugin only from
`apps/control-station/src/composition/devicePlugins.ts`. The generic shell never
branches on this plugin ID or reads `k1_ip`, BLE candidates, MQTT topics, or
other vendor state.

Backend startup loads the reviewed factory declared by `backendEntrypoint`, then
cross-checks its plugin ID and complete action set against this manifest.
Actions enter through the host dispatcher and the transitional facade
`src/k1link/web/xgrids_k1_facade.py`. The old flat routes live in the plugin's
legacy router; both paths delegate to the same proven
`XgridsK1CompatibilityService` methods. Synchronous capture/runtime operations
run outside the FastAPI event loop.

Model switching calls the plugin deactivation hook and must receive a successful
`stream.stop` before Mission Core removes this custom UI. BLE, MQTT, codec and
evidence modules remain in `src/k1link` until replay parity and another physical
K1 regression are complete.