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kaptan/ground-suite/README.md
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# Ground Suite
Ground Suite is Kaptan's desktop ground-control software. Its application
identifier is `dev.kaptan.ground_suite`.
## Current scope
The first vertical slice is a **read-only observability console**. It uses a
deterministic replay fixture to present a vehicle identity, heartbeat state,
telemetry presence, ordinary logs, runtime errors, and orderly-shutdown
observations. It never sends bytes to a vehicle.
This is deliberate: the current F722 firmware rejects every inbound MAVLink
frame, and `kaptan-sitl serve` has no MAVLink endpoint. A connected-looking UI
must not suggest the vehicle is controllable, safe, armed, or writable.
## Architecture
```text
VehicleDataPort (replay now; MAVLink adapter later)
-> typed observation-or-drop updates
-> Riverpod observability state
-> Overview / Diagnostics presentation
```
`MavlinkByteSource` and `MavlinkEventDecoder` are receive-only seams. The
future decoder must combine pinned MAVLink Common definitions with Kaptan's
`kaptan.xml` root, and preserve the firmware's semantic rules for bounded
`KAPTAN_LOG`, `KAPTAN_ERROR`, and `KAPTAN_SHUTDOWN` payloads. Raw severity,
shutdown-reason, and diagnostic-flag values remain visible even when an app
does not yet recognise them. Expected malformed or unsupported frames become
parser/semantic drop updates and never terminate the observation stream.
## Development
From the repository root:
```sh
nix develop -c flutter analyze ground-suite
nix develop -c dart format --set-exit-if-changed ground-suite
nix develop -c sh -c 'cd ground-suite && flutter test'
nix develop -c sh -c 'cd ground-suite && flutter run -d linux'
```
Linux is the first tested desktop runner. Native macOS and Windows runners
will be added only with their respective CI coverage.
## Appearance
Ground Suite supplies light and dark themes and follows the operating system
by default. Its dark palette uses near-black, muted-silver, and restrained
green accents; translucent, locally blurred panels keep operational content
legible without turning diagnostics into decoration.
## Deliberately deferred work
- TODO(gcs-live-mavlink): generated MAVLink Common plus custom-dialect
bindings, a MAVLink 2 receive parser, semantic validation, and
serial/UDP/recording endpoints.
- TODO(gcs-connection): endpoint lifecycle, reconnect generation, link-loss
policy, and parser/semantic-drop accounting sourced from real frames.
- TODO(gcs-config): descriptor-driven configuration UI only after firmware has
authenticated ingress, source binding, persistent anti-replay state, target
storage, and a disarmed atomic activation path.
- TODO(gcs-upload): CBOR import/export only through the reviewed transaction
protocol; never treat a local file as active vehicle configuration.
- TODO(gcs-control): arm, command, calibration, and shutdown workflows need
their own reviewed authority and safety contracts.