diff --git a/ground-suite/.gitignore b/ground-suite/.gitignore
new file mode 100644
index 0000000..3820a95
--- /dev/null
+++ b/ground-suite/.gitignore
@@ -0,0 +1,45 @@
+# Miscellaneous
+*.class
+*.log
+*.pyc
+*.swp
+.DS_Store
+.atom/
+.build/
+.buildlog/
+.history
+.svn/
+.swiftpm/
+migrate_working_dir/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
+
+# The .vscode folder contains launch configuration and tasks you configure in
+# VS Code which you may wish to be included in version control, so this line
+# is commented out by default.
+#.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+**/ios/Flutter/.last_build_id
+.dart_tool/
+.flutter-plugins-dependencies
+.pub-cache/
+.pub/
+/build/
+/coverage/
+
+# Symbolication related
+app.*.symbols
+
+# Obfuscation related
+app.*.map.json
+
+# Android Studio will place build artifacts here
+/android/app/debug
+/android/app/profile
+/android/app/release
diff --git a/ground-suite/.metadata b/ground-suite/.metadata
new file mode 100644
index 0000000..2215ee3
--- /dev/null
+++ b/ground-suite/.metadata
@@ -0,0 +1,30 @@
+# This file tracks properties of this Flutter project.
+# Used by Flutter tool to assess capabilities and perform upgrades etc.
+#
+# This file should be version controlled and should not be manually edited.
+
+version:
+  revision: "nixpkgs000000000000000000000000000000000"
+  channel: "stable"
+
+project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: nixpkgs000000000000000000000000000000000
+      base_revision: nixpkgs000000000000000000000000000000000
+    - platform: linux
+      create_revision: nixpkgs000000000000000000000000000000000
+      base_revision: nixpkgs000000000000000000000000000000000
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'
diff --git a/ground-suite/README.md b/ground-suite/README.md
new file mode 100644
index 0000000..ff8846a
--- /dev/null
+++ b/ground-suite/README.md
@@ -0,0 +1,61 @@
+# Ground Suite
+
+Ground Suite is Kaptan's desktop ground-control software. Its application
+identifier is `com.orkavian.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.
+
+## 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.
diff --git a/ground-suite/analysis_options.yaml b/ground-suite/analysis_options.yaml
new file mode 100644
index 0000000..0d29021
--- /dev/null
+++ b/ground-suite/analysis_options.yaml
@@ -0,0 +1,28 @@
+# This file configures the analyzer, which statically analyzes Dart code to
+# check for errors, warnings, and lints.
+#
+# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
+# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
+# invoked from the command line by running `flutter analyze`.
+
+# The following line activates a set of recommended lints for Flutter apps,
+# packages, and plugins designed to encourage good coding practices.
+include: package:flutter_lints/flutter.yaml
+
+linter:
+  # The lint rules applied to this project can be customized in the
+  # section below to disable rules from the `package:flutter_lints/flutter.yaml`
+  # included above or to enable additional rules. A list of all available lints
+  # and their documentation is published at https://dart.dev/lints.
+  #
+  # Instead of disabling a lint rule for the entire project in the
+  # section below, it can also be suppressed for a single line of code
+  # or a specific dart file by using the `// ignore: name_of_lint` and
+  # `// ignore_for_file: name_of_lint` syntax on the line or in the file
+  # producing the lint.
+  rules:
+    # avoid_print: false  # Uncomment to disable the `avoid_print` rule
+    # prefer_single_quotes: true  # Uncomment to enable the `prefer_single_quotes` rule
+
+# Additional information about this file can be found at
+# https://dart.dev/guides/language/analysis-options
diff --git a/ground-suite/lib/app/app.dart b/ground-suite/lib/app/app.dart
new file mode 100644
index 0000000..56673c4
--- /dev/null
+++ b/ground-suite/lib/app/app.dart
@@ -0,0 +1,18 @@
+import 'package:flutter/material.dart';
+
+import 'app_shell.dart';
+import 'theme.dart';
+
+class GroundSuiteApp extends StatelessWidget {
+  const GroundSuiteApp({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Ground Suite',
+      debugShowCheckedModeBanner: false,
+      theme: groundSuiteTheme(),
+      home: const AppShell(),
+    );
+  }
+}
diff --git a/ground-suite/lib/app/app_shell.dart b/ground-suite/lib/app/app_shell.dart
new file mode 100644
index 0000000..e35463b
--- /dev/null
+++ b/ground-suite/lib/app/app_shell.dart
@@ -0,0 +1,242 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../features/diagnostics/presentation/diagnostics_page.dart';
+import '../features/observability/presentation/observability_controller.dart';
+import '../features/overview/presentation/overview_page.dart';
+
+enum _Destination { overview, diagnostics }
+
+class AppShell extends ConsumerStatefulWidget {
+  const AppShell({super.key});
+
+  @override
+  ConsumerState<AppShell> createState() => _AppShellState();
+}
+
+class _AppShellState extends ConsumerState<AppShell> {
+  _Destination _destination = _Destination.overview;
+
+  @override
+  Widget build(BuildContext context) {
+    final state = ref.watch(observabilityControllerProvider);
+    const pages = <Widget>[OverviewPage(), DiagnosticsPage()];
+
+    return Scaffold(
+      body: SafeArea(
+        child: Stack(
+          children: [
+            LayoutBuilder(
+              builder: (context, constraints) {
+                final compact = constraints.maxWidth < 760;
+                final content = _Workspace(
+                  state: state,
+                  selectedIndex: _destination.index,
+                  pages: pages,
+                  compact: compact,
+                );
+                return compact
+                    ? _CompactShell(
+                        selectedIndex: _destination.index,
+                        onSelected: _selectDestination,
+                        content: content,
+                      )
+                    : _WideShell(
+                        selectedIndex: _destination.index,
+                        onSelected: _selectDestination,
+                        content: content,
+                      );
+              },
+            ),
+            if (state.accessibilityAnnouncement case final announcement?)
+              _CriticalAnnouncement(message: announcement),
+          ],
+        ),
+      ),
+    );
+  }
+
+  void _selectDestination(int index) {
+    setState(() => _destination = _Destination.values[index]);
+  }
+}
+
+class _WideShell extends StatelessWidget {
+  const _WideShell({
+    required this.selectedIndex,
+    required this.onSelected,
+    required this.content,
+  });
+
+  final int selectedIndex;
+  final ValueChanged<int> onSelected;
+  final Widget content;
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      children: [
+        NavigationRail(
+          selectedIndex: selectedIndex,
+          labelType: NavigationRailLabelType.all,
+          onDestinationSelected: onSelected,
+          leading: const Padding(
+            padding: EdgeInsets.symmetric(vertical: 16),
+            child: Icon(Icons.flight_takeoff_outlined, size: 28),
+          ),
+          destinations: _destinations,
+        ),
+        const VerticalDivider(width: 1),
+        Expanded(child: content),
+      ],
+    );
+  }
+}
+
+class _CompactShell extends StatelessWidget {
+  const _CompactShell({
+    required this.selectedIndex,
+    required this.onSelected,
+    required this.content,
+  });
+
+  final int selectedIndex;
+  final ValueChanged<int> onSelected;
+  final Widget content;
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        Expanded(child: content),
+        NavigationBar(
+          selectedIndex: selectedIndex,
+          onDestinationSelected: onSelected,
+          destinations: const [
+            NavigationDestination(
+              icon: Icon(Icons.space_dashboard_outlined),
+              selectedIcon: Icon(Icons.space_dashboard),
+              label: 'Overview',
+            ),
+            NavigationDestination(
+              icon: Icon(Icons.receipt_long_outlined),
+              selectedIcon: Icon(Icons.receipt_long),
+              label: 'Diagnostics',
+            ),
+          ],
+        ),
+      ],
+    );
+  }
+}
+
+const _destinations = <NavigationRailDestination>[
+  NavigationRailDestination(
+    icon: Icon(Icons.space_dashboard_outlined),
+    selectedIcon: Icon(Icons.space_dashboard),
+    label: Text('Overview'),
+  ),
+  NavigationRailDestination(
+    icon: Icon(Icons.receipt_long_outlined),
+    selectedIcon: Icon(Icons.receipt_long),
+    label: Text('Diagnostics'),
+  ),
+];
+
+class _Workspace extends StatelessWidget {
+  const _Workspace({
+    required this.state,
+    required this.selectedIndex,
+    required this.pages,
+    required this.compact,
+  });
+
+  final ObservabilityState state;
+  final int selectedIndex;
+  final List<Widget> pages;
+  final bool compact;
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        _ConnectionBar(state: state, compact: compact),
+        const Divider(height: 1),
+        Expanded(
+          child: IndexedStack(index: selectedIndex, children: pages),
+        ),
+      ],
+    );
+  }
+}
+
+class _ConnectionBar extends StatelessWidget {
+  const _ConnectionBar({required this.state, required this.compact});
+
+  final ObservabilityState state;
+  final bool compact;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final heartbeat = state.lastHeartbeat;
+    final peer = heartbeat == null
+        ? 'No vehicle identity observed'
+        : 'System ${heartbeat.systemId} / component ${heartbeat.componentId}';
+    final frameTime = state.lastFrameAt == null
+        ? 'No frames received'
+        : 'Last frame ${_formatTimestamp(state.lastFrameAt!)}';
+
+    return Semantics(
+      label: '${state.status.label}; ${state.sourceLabel}; $peer; $frameTime',
+      child: Padding(
+        padding: EdgeInsets.symmetric(
+          horizontal: compact ? 16 : 24,
+          vertical: 12,
+        ),
+        child: Wrap(
+          spacing: 8,
+          runSpacing: 8,
+          crossAxisAlignment: WrapCrossAlignment.center,
+          children: [
+            Icon(Icons.visibility_outlined, color: theme.colorScheme.primary),
+            Text('Observation only', style: theme.textTheme.titleSmall),
+            _StatusChip(label: state.sourceLabel),
+            _StatusChip(label: state.status.label),
+            Text(peer),
+            Text(frameTime),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class _CriticalAnnouncement extends StatelessWidget {
+  const _CriticalAnnouncement({required this.message});
+
+  final String message;
+
+  @override
+  Widget build(BuildContext context) {
+    return Semantics(
+      container: true,
+      liveRegion: true,
+      label: message,
+      child: const SizedBox.square(dimension: 1),
+    );
+  }
+}
+
+class _StatusChip extends StatelessWidget {
+  const _StatusChip({required this.label});
+
+  final String label;
+
+  @override
+  Widget build(BuildContext context) {
+    return Chip(label: Text(label), visualDensity: VisualDensity.compact);
+  }
+}
+
+String _formatTimestamp(DateTime value) => value.toIso8601String();
diff --git a/ground-suite/lib/app/theme.dart b/ground-suite/lib/app/theme.dart
new file mode 100644
index 0000000..2ee4fea
--- /dev/null
+++ b/ground-suite/lib/app/theme.dart
@@ -0,0 +1,17 @@
+import 'package:flutter/material.dart';
+
+ThemeData groundSuiteTheme() {
+  const seed = Color(0xff006c8f);
+  final scheme = ColorScheme.fromSeed(seedColor: seed);
+
+  return ThemeData(
+    useMaterial3: true,
+    colorScheme: scheme,
+    scaffoldBackgroundColor: scheme.surface,
+    visualDensity: VisualDensity.standard,
+    cardTheme: CardThemeData(
+      elevation: 0,
+      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
+    ),
+  );
+}
diff --git a/ground-suite/lib/core/mavlink/mavlink_byte_source.dart b/ground-suite/lib/core/mavlink/mavlink_byte_source.dart
new file mode 100644
index 0000000..3a2d39d
--- /dev/null
+++ b/ground-suite/lib/core/mavlink/mavlink_byte_source.dart
@@ -0,0 +1,12 @@
+import 'dart:typed_data';
+
+/// Receive-only bytes from one MAVLink transport endpoint.
+///
+/// A source has one reader and owns its close lifecycle. A future adapter will
+/// bind serial, UDP, or a recording source here; no source in the first slice
+/// may write bytes to a vehicle.
+abstract interface class MavlinkByteSource {
+  Stream<Uint8List> get chunks;
+
+  Future<void> close();
+}
diff --git a/ground-suite/lib/core/mavlink/mavlink_event_decoder.dart b/ground-suite/lib/core/mavlink/mavlink_event_decoder.dart
new file mode 100644
index 0000000..8312764
--- /dev/null
+++ b/ground-suite/lib/core/mavlink/mavlink_event_decoder.dart
@@ -0,0 +1,13 @@
+import '../observations/vehicle_data_update.dart';
+import 'mavlink_byte_source.dart';
+
+/// Converts a receive-only MAVLink byte stream into semantically safe events.
+///
+/// TODO(gcs-live-mavlink): generate this adapter from pinned MAVLink Common
+/// definitions plus Kaptan's `kaptan.xml` root. It must reject MAVLink 1 and
+/// CRC-invalid MAVLink 2 frames, validate every fixed diagnostic length before
+/// UTF-8 decoding, retain unknown enum values and flags, and emit parser or
+/// semantic drop updates without ending the connection.
+abstract interface class MavlinkEventDecoder {
+  Stream<VehicleDataUpdate> decode(MavlinkByteSource source);
+}
diff --git a/ground-suite/lib/core/observations/observed_event.dart b/ground-suite/lib/core/observations/observed_event.dart
new file mode 100644
index 0000000..89621a0
--- /dev/null
+++ b/ground-suite/lib/core/observations/observed_event.dart
@@ -0,0 +1,136 @@
+/// A MAVLink severity value retained exactly as it appeared on the wire.
+///
+/// Known values follow MAVLink's numeric severity semantics. Unknown values
+/// remain displayable so a newer vehicle cannot silently lose diagnostic
+/// meaning before Ground Suite has been updated.
+final class MavSeverity {
+  const MavSeverity(this.wireValue);
+
+  static const emergency = MavSeverity(0);
+  static const alert = MavSeverity(1);
+  static const critical = MavSeverity(2);
+  static const error = MavSeverity(3);
+  static const warning = MavSeverity(4);
+  static const notice = MavSeverity(5);
+  static const info = MavSeverity(6);
+  static const debug = MavSeverity(7);
+
+  final int wireValue;
+
+  String get label => switch (wireValue) {
+    0 => 'Emergency',
+    1 => 'Alert',
+    2 => 'Critical',
+    3 => 'Error',
+    4 => 'Warning',
+    5 => 'Notice',
+    6 => 'Info',
+    7 => 'Debug',
+    _ => 'Unknown ($wireValue)',
+  };
+}
+
+/// A KAPTAN_SHUTDOWN reason retained exactly as it appeared on the wire.
+final class KaptanShutdownReason {
+  const KaptanShutdownReason(this.wireValue);
+
+  static const operator = KaptanShutdownReason(1);
+  static const safety = KaptanShutdownReason(2);
+
+  final int wireValue;
+
+  String get label => switch (wireValue) {
+    1 => 'Operator',
+    2 => 'Safety',
+    _ => 'Unknown ($wireValue)',
+  };
+}
+
+enum TelemetryKind {
+  rawImu,
+  distanceSensor,
+  opticalFlow;
+
+  String get label => switch (this) {
+    TelemetryKind.rawImu => 'Raw IMU',
+    TelemetryKind.distanceSensor => 'Distance sensor',
+    TelemetryKind.opticalFlow => 'Optical flow',
+  };
+}
+
+sealed class ObservedEvent {
+  const ObservedEvent({required this.receivedAt});
+
+  final DateTime receivedAt;
+}
+
+final class HeartbeatEvent extends ObservedEvent {
+  const HeartbeatEvent({
+    required super.receivedAt,
+    required this.systemId,
+    required this.componentId,
+    required this.armed,
+    required this.vehicleState,
+  });
+
+  final int systemId;
+  final int componentId;
+  final bool armed;
+  final String vehicleState;
+}
+
+final class TelemetryEvent extends ObservedEvent {
+  const TelemetryEvent({required super.receivedAt, required this.kind});
+
+  final TelemetryKind kind;
+}
+
+final class LogEvent extends ObservedEvent {
+  const LogEvent({
+    required super.receivedAt,
+    required this.level,
+    required this.message,
+    this.flags = 0,
+  });
+
+  static const traceFlag = 1;
+  static const truncatedFlag = 2;
+  static const coalescedFlag = 4;
+  static const knownFlags = traceFlag | truncatedFlag | coalescedFlag;
+
+  final MavSeverity level;
+  final String message;
+  final int flags;
+
+  bool get isTrace => flags & traceFlag != 0;
+  bool get isTruncated => flags & truncatedFlag != 0;
+  bool get isCoalesced => flags & coalescedFlag != 0;
+  int get unknownFlags => flags & ~knownFlags;
+}
+
+final class ErrorEvent extends ObservedEvent {
+  const ErrorEvent({
+    required super.receivedAt,
+    required this.path,
+    this.additionalInformation = '',
+    this.flags = 0,
+  });
+
+  static const truncatedFlag = 2;
+  static const coalescedFlag = 4;
+  static const knownFlags = truncatedFlag | coalescedFlag;
+
+  final String path;
+  final String additionalInformation;
+  final int flags;
+
+  bool get isTruncated => flags & truncatedFlag != 0;
+  bool get isCoalesced => flags & coalescedFlag != 0;
+  int get unknownFlags => flags & ~knownFlags;
+}
+
+final class ShutdownEvent extends ObservedEvent {
+  const ShutdownEvent({required super.receivedAt, required this.reason});
+
+  final KaptanShutdownReason reason;
+}
diff --git a/ground-suite/lib/core/observations/vehicle_data_port.dart b/ground-suite/lib/core/observations/vehicle_data_port.dart
new file mode 100644
index 0000000..31bcec6
--- /dev/null
+++ b/ground-suite/lib/core/observations/vehicle_data_port.dart
@@ -0,0 +1,16 @@
+import 'vehicle_data_update.dart';
+
+/// A receive-only source of already-classified vehicle observations.
+///
+/// The replay implementation is the first concrete port. A live port may be
+/// added only after the custom MAVLink decoder has its length/CRC/enum safety
+/// contract and endpoint lifecycle tests.
+abstract interface class VehicleDataPort {
+  String get label;
+
+  bool get isReplay;
+
+  Stream<VehicleDataUpdate> observe();
+
+  Future<void> close();
+}
diff --git a/ground-suite/lib/core/observations/vehicle_data_update.dart b/ground-suite/lib/core/observations/vehicle_data_update.dart
new file mode 100644
index 0000000..3a83e12
--- /dev/null
+++ b/ground-suite/lib/core/observations/vehicle_data_update.dart
@@ -0,0 +1,28 @@
+import 'observed_event.dart';
+
+/// One receive-side outcome from a vehicle-data transport.
+///
+/// Expected malformed or unsupported MAVLink frames are reported as drops and
+/// must not terminate the transport stream. Transport failures remain stream
+/// errors because the connection lifecycle must handle them separately.
+sealed class VehicleDataUpdate {
+  const VehicleDataUpdate();
+}
+
+/// A classified observation that is safe to present.
+final class ObservationReceived extends VehicleDataUpdate {
+  const ObservationReceived(this.event);
+
+  final ObservedEvent event;
+}
+
+enum ObservationDropKind { parser, semantic }
+
+/// One or more rejected frames, retained only as bounded accounting.
+final class ObservationDropped extends VehicleDataUpdate {
+  const ObservationDropped({required this.kind, this.count = 1})
+    : assert(count > 0);
+
+  final ObservationDropKind kind;
+  final int count;
+}
diff --git a/ground-suite/lib/core/transport/replay_vehicle_data_port.dart b/ground-suite/lib/core/transport/replay_vehicle_data_port.dart
new file mode 100644
index 0000000..480e82f
--- /dev/null
+++ b/ground-suite/lib/core/transport/replay_vehicle_data_port.dart
@@ -0,0 +1,65 @@
+import '../observations/observed_event.dart';
+import '../observations/vehicle_data_port.dart';
+import '../observations/vehicle_data_update.dart';
+
+/// Deterministic observations for the first Ground Suite workflow.
+///
+/// This is intentionally a typed replay rather than a pretend connected
+/// vehicle. Raw frame replay moves behind the MAVLink decoder once bindings
+/// are generated from the MAVLink Common and Kaptan dialect definitions.
+final class ReplayVehicleDataPort implements VehicleDataPort {
+  const ReplayVehicleDataPort();
+
+  @override
+  String get label => 'Replay fixture';
+
+  @override
+  bool get isReplay => true;
+
+  @override
+  Stream<VehicleDataUpdate> observe() => Stream<VehicleDataUpdate>.fromIterable(
+    _events.map(ObservationReceived.new),
+  );
+
+  @override
+  Future<void> close() async {}
+
+  static final List<ObservedEvent> _events = [
+    HeartbeatEvent(
+      receivedAt: DateTime.utc(2026, 8, 10, 12),
+      systemId: 1,
+      componentId: 1,
+      armed: false,
+      vehicleState: 'Standby',
+    ),
+    TelemetryEvent(
+      receivedAt: DateTime.utc(2026, 8, 10, 12, 0, 1),
+      kind: TelemetryKind.rawImu,
+    ),
+    TelemetryEvent(
+      receivedAt: DateTime.utc(2026, 8, 10, 12, 0, 2),
+      kind: TelemetryKind.distanceSensor,
+    ),
+    LogEvent(
+      receivedAt: DateTime.utc(2026, 8, 10, 12, 0, 3),
+      level: MavSeverity.warning,
+      message: 'Range aid stale',
+      flags: LogEvent.coalescedFlag,
+    ),
+    ErrorEvent(
+      receivedAt: DateTime.utc(2026, 8, 10, 12, 0, 4),
+      path: 'kaptan_drivers::lidar_lite_v3::error::Error::TransferFault',
+      additionalInformation: 'The replay contains a bounded error detail.',
+      flags: ErrorEvent.truncatedFlag,
+    ),
+    LogEvent(
+      receivedAt: DateTime.utc(2026, 8, 10, 12, 0, 5),
+      level: MavSeverity.info,
+      message: 'Replay fixture complete',
+    ),
+    ShutdownEvent(
+      receivedAt: DateTime.utc(2026, 8, 10, 12, 0, 6),
+      reason: KaptanShutdownReason.operator,
+    ),
+  ];
+}
diff --git a/ground-suite/lib/features/diagnostics/presentation/diagnostics_page.dart b/ground-suite/lib/features/diagnostics/presentation/diagnostics_page.dart
new file mode 100644
index 0000000..cd6489e
--- /dev/null
+++ b/ground-suite/lib/features/diagnostics/presentation/diagnostics_page.dart
@@ -0,0 +1,273 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../../core/observations/observed_event.dart';
+import '../../../shared/widgets/severity_badge.dart';
+import '../../observability/presentation/observability_controller.dart';
+
+enum _DiagnosticFilter { all, logs, errors, shutdowns }
+
+class DiagnosticsPage extends ConsumerStatefulWidget {
+  const DiagnosticsPage({super.key});
+
+  @override
+  ConsumerState<DiagnosticsPage> createState() => _DiagnosticsPageState();
+}
+
+class _DiagnosticsPageState extends ConsumerState<DiagnosticsPage> {
+  _DiagnosticFilter _filter = _DiagnosticFilter.all;
+  String _query = '';
+
+  @override
+  Widget build(BuildContext context) {
+    final state = ref.watch(observabilityControllerProvider);
+    final events = state.events.where(_matches).toList(growable: false);
+
+    return ListView(
+      padding: const EdgeInsets.all(24),
+      children: [
+        Text('Diagnostics', style: Theme.of(context).textTheme.headlineMedium),
+        const SizedBox(height: 8),
+        const Text(
+          'Messages remain distinct by protocol class. A configuration result '
+          'will remain authoritative when configuration support is added.',
+        ),
+        const SizedBox(height: 16),
+        Wrap(
+          spacing: 8,
+          runSpacing: 8,
+          children: _DiagnosticFilter.values
+              .map(
+                (filter) => ChoiceChip(
+                  label: Text(_labelFor(filter)),
+                  selected: _filter == filter,
+                  onSelected: (_) => setState(() => _filter = filter),
+                ),
+              )
+              .toList(growable: false),
+        ),
+        const SizedBox(height: 12),
+        TextField(
+          decoration: const InputDecoration(
+            border: OutlineInputBorder(),
+            labelText: 'Filter diagnostics',
+            prefixIcon: Icon(Icons.search),
+          ),
+          onChanged: (value) {
+            setState(() => _query = value.trim().toLowerCase());
+          },
+        ),
+        const SizedBox(height: 16),
+        if (events.isEmpty)
+          const Card(
+            child: Padding(
+              padding: EdgeInsets.all(20),
+              child: Text('No diagnostic observations match this filter.'),
+            ),
+          )
+        else
+          ...events.map((event) => _DiagnosticCard(event: event)),
+      ],
+    );
+  }
+
+  bool _matches(ObservedEvent event) {
+    final typeMatches = switch (_filter) {
+      _DiagnosticFilter.all =>
+        event is LogEvent || event is ErrorEvent || event is ShutdownEvent,
+      _DiagnosticFilter.logs => event is LogEvent,
+      _DiagnosticFilter.errors => event is ErrorEvent,
+      _DiagnosticFilter.shutdowns => event is ShutdownEvent,
+    };
+    if (!typeMatches) {
+      return false;
+    }
+    if (_query.isEmpty) {
+      return true;
+    }
+    return _searchableText(event).toLowerCase().contains(_query);
+  }
+}
+
+class _DiagnosticCard extends StatelessWidget {
+  const _DiagnosticCard({required this.event});
+
+  final ObservedEvent event;
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+    final content = switch (event) {
+      LogEvent(:final level, :final message, :final flags) => _LogContent(
+        level: level,
+        message: message,
+        flags: flags,
+      ),
+      ErrorEvent(:final path, :final additionalInformation, :final flags) =>
+        _ErrorContent(
+          path: path,
+          additionalInformation: additionalInformation,
+          flags: flags,
+        ),
+      ShutdownEvent(:final reason) => _ShutdownContent(reason: reason),
+      _ => null,
+    };
+    if (content == null) {
+      return const SizedBox.shrink();
+    }
+
+    return Semantics(
+      container: true,
+      label: content.semanticLabel,
+      child: Card(
+        margin: const EdgeInsets.only(bottom: 12),
+        child: Padding(
+          padding: const EdgeInsets.all(16),
+          child: Row(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              content.leading,
+              const SizedBox(width: 12),
+              Expanded(
+                child: SelectionArea(
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      Text(content.title, style: theme.textTheme.titleMedium),
+                      const SizedBox(height: 4),
+                      Text(content.detail),
+                      if (content.additionalDetail case final detail?) ...[
+                        const SizedBox(height: 8),
+                        Text(detail),
+                      ],
+                      const SizedBox(height: 8),
+                      Text(
+                        event.receivedAt.toIso8601String(),
+                        style: theme.textTheme.bodySmall,
+                      ),
+                    ],
+                  ),
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
+
+class _DiagnosticContent {
+  const _DiagnosticContent({
+    required this.leading,
+    required this.title,
+    required this.detail,
+    required this.semanticLabel,
+    this.additionalDetail,
+  });
+
+  final Widget leading;
+  final String title;
+  final String detail;
+  final String? additionalDetail;
+  final String semanticLabel;
+}
+
+class _LogContent extends _DiagnosticContent {
+  _LogContent({
+    required MavSeverity level,
+    required String message,
+    required int flags,
+  }) : super(
+         leading: SeverityBadge(level: level),
+         title: 'Log — ${level.label}',
+         detail: message,
+         additionalDetail: _formatLogFlags(flags),
+         semanticLabel: _semanticLogLabel(level, message, flags),
+       );
+}
+
+class _ErrorContent extends _DiagnosticContent {
+  _ErrorContent({
+    required String path,
+    required String additionalInformation,
+    required int flags,
+  }) : super(
+         leading: const SeverityBadge(level: MavSeverity.error),
+         title: 'Error',
+         detail: path,
+         additionalDetail: _formatErrorDetail(additionalInformation, flags),
+         semanticLabel: _semanticErrorLabel(path, additionalInformation, flags),
+       );
+}
+
+class _ShutdownContent extends _DiagnosticContent {
+  _ShutdownContent({required KaptanShutdownReason reason})
+    : super(
+        leading: const Icon(Icons.power_settings_new_outlined),
+        title: 'Orderly shutdown observed',
+        detail: 'Reason: ${reason.label}',
+        semanticLabel: 'Orderly shutdown observed: ${reason.label}',
+      );
+}
+
+String _labelFor(_DiagnosticFilter filter) => switch (filter) {
+  _DiagnosticFilter.all => 'All',
+  _DiagnosticFilter.logs => 'Logs',
+  _DiagnosticFilter.errors => 'Errors',
+  _DiagnosticFilter.shutdowns => 'Shutdowns',
+};
+
+String _searchableText(ObservedEvent event) => switch (event) {
+  LogEvent(:final level, :final message) => '${level.label} $message',
+  ErrorEvent(:final path, :final additionalInformation) =>
+    '$path $additionalInformation',
+  ShutdownEvent(:final reason) => reason.label,
+  _ => '',
+};
+
+String? _formatLogFlags(int flags) {
+  final labels = <String>[
+    if (flags & LogEvent.traceFlag != 0) 'Trace',
+    if (flags & LogEvent.truncatedFlag != 0) 'Truncated',
+    if (flags & LogEvent.coalescedFlag != 0) 'Coalesced',
+    if (flags & ~LogEvent.knownFlags != 0)
+      'Unknown bits 0x${(flags & ~LogEvent.knownFlags).toRadixString(16)}',
+  ];
+  return labels.isEmpty ? null : 'Flags: ${labels.join(', ')}';
+}
+
+String? _formatErrorDetail(String additionalInformation, int flags) {
+  final flagDetail = _formatErrorFlags(flags);
+  final details = <String>[
+    if (additionalInformation.isNotEmpty) additionalInformation,
+    ?flagDetail,
+  ];
+  return details.isEmpty ? null : details.join('\n');
+}
+
+String? _formatErrorFlags(int flags) {
+  final labels = <String>[
+    if (flags & ErrorEvent.truncatedFlag != 0) 'Truncated',
+    if (flags & ErrorEvent.coalescedFlag != 0) 'Coalesced',
+    if (flags & ~ErrorEvent.knownFlags != 0)
+      'Unknown bits 0x${(flags & ~ErrorEvent.knownFlags).toRadixString(16)}',
+  ];
+  return labels.isEmpty ? null : 'Flags: ${labels.join(', ')}';
+}
+
+String _semanticLogLabel(MavSeverity level, String message, int flags) {
+  final flagDetail = _formatLogFlags(flags);
+  return flagDetail == null
+      ? '${level.label} log: $message'
+      : '${level.label} log: $message. $flagDetail';
+}
+
+String _semanticErrorLabel(
+  String path,
+  String additionalInformation,
+  int flags,
+) {
+  final detail = _formatErrorDetail(additionalInformation, flags);
+  return detail == null ? 'Error: $path' : 'Error: $path. $detail';
+}
diff --git a/ground-suite/lib/features/observability/presentation/observability_controller.dart b/ground-suite/lib/features/observability/presentation/observability_controller.dart
new file mode 100644
index 0000000..db50f04
--- /dev/null
+++ b/ground-suite/lib/features/observability/presentation/observability_controller.dart
@@ -0,0 +1,206 @@
+import 'dart:async';
+
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../../core/observations/observed_event.dart';
+import '../../../core/observations/vehicle_data_port.dart';
+import '../../../core/observations/vehicle_data_update.dart';
+import '../../../core/transport/replay_vehicle_data_port.dart';
+
+final vehicleDataPortProvider = Provider<VehicleDataPort>((ref) {
+  final port = const ReplayVehicleDataPort();
+  ref.onDispose(() => unawaited(port.close()));
+  return port;
+});
+
+final observabilityControllerProvider =
+    NotifierProvider<ObservabilityController, ObservabilityState>(
+      ObservabilityController.new,
+    );
+
+class ObservabilityController extends Notifier<ObservabilityState> {
+  static const _criticalAnnouncementWindow = Duration(seconds: 2);
+
+  StreamSubscription<VehicleDataUpdate>? _subscription;
+  DateTime? _lastCriticalAnnouncementAt;
+
+  @override
+  ObservabilityState build() {
+    final source = ref.read(vehicleDataPortProvider);
+    ref.onDispose(_cancelSubscription);
+    Future<void>.microtask(() => _observe(source));
+    return ObservabilityState.initial(source);
+  }
+
+  void _observe(VehicleDataPort source) {
+    _subscription = source.observe().listen(
+      _handleUpdate,
+      onError: (Object _, StackTrace _) {
+        state = state.copyWith(
+          status: ObservationStatus.disconnected,
+          accessibilityAnnouncement: 'Observation connection closed.',
+          replaceAccessibilityAnnouncement: true,
+        );
+      },
+      onDone: () {
+        state = state.copyWith(
+          status: source.isReplay
+              ? ObservationStatus.replayComplete
+              : ObservationStatus.disconnected,
+          accessibilityAnnouncement: source.isReplay
+              ? 'Replay complete.'
+              : 'Observation connection closed.',
+          replaceAccessibilityAnnouncement: true,
+        );
+      },
+    );
+  }
+
+  void _handleUpdate(VehicleDataUpdate update) {
+    switch (update) {
+      case ObservationReceived(:final event):
+        _record(event);
+      case ObservationDropped(:final kind, :final count):
+        state = state.copyWith(
+          status: ObservationStatus.receiving,
+          parserDropCount:
+              state.parserDropCount +
+              (kind == ObservationDropKind.parser ? count : 0),
+          semanticDropCount:
+              state.semanticDropCount +
+              (kind == ObservationDropKind.semantic ? count : 0),
+        );
+    }
+  }
+
+  void _record(ObservedEvent event) {
+    final announcement = _announcementFor(event);
+    state = state.copyWith(
+      status: ObservationStatus.receiving,
+      lastFrameAt: event.receivedAt,
+      events: [...state.events, event],
+      accessibilityAnnouncement: announcement.message,
+      replaceAccessibilityAnnouncement: true,
+      coalescedAlertCount:
+          state.coalescedAlertCount + (announcement.coalesced ? 1 : 0),
+    );
+  }
+
+  _AnnouncementDecision _announcementFor(ObservedEvent event) {
+    final candidate = switch (event) {
+      ErrorEvent(:final path) => 'Error received: $path',
+      ShutdownEvent(:final reason) =>
+        'Orderly shutdown observed: ${reason.label}',
+      _ => null,
+    };
+    if (candidate == null) {
+      return const _AnnouncementDecision();
+    }
+
+    final now = DateTime.now();
+    final previous = _lastCriticalAnnouncementAt;
+    if (previous != null &&
+        now.difference(previous) < _criticalAnnouncementWindow) {
+      return const _AnnouncementDecision(coalesced: true);
+    }
+    _lastCriticalAnnouncementAt = now;
+    return _AnnouncementDecision(message: candidate);
+  }
+
+  void _cancelSubscription() {
+    _subscription?.cancel();
+  }
+}
+
+enum ObservationStatus {
+  starting('Starting'),
+  receiving('Observing'),
+  replayComplete('Replay complete'),
+  disconnected('Disconnected');
+
+  const ObservationStatus(this.label);
+
+  final String label;
+}
+
+class ObservabilityState {
+  const ObservabilityState({
+    required this.sourceLabel,
+    required this.isReplay,
+    required this.status,
+    required this.events,
+    required this.parserDropCount,
+    required this.semanticDropCount,
+    required this.coalescedAlertCount,
+    this.lastFrameAt,
+    this.accessibilityAnnouncement,
+  });
+
+  factory ObservabilityState.initial(VehicleDataPort source) {
+    return ObservabilityState(
+      sourceLabel: source.label,
+      isReplay: source.isReplay,
+      status: ObservationStatus.starting,
+      events: const [],
+      parserDropCount: 0,
+      semanticDropCount: 0,
+      coalescedAlertCount: 0,
+    );
+  }
+
+  final String sourceLabel;
+  final bool isReplay;
+  final ObservationStatus status;
+  final List<ObservedEvent> events;
+  final int parserDropCount;
+  final int semanticDropCount;
+  final int coalescedAlertCount;
+  final DateTime? lastFrameAt;
+  final String? accessibilityAnnouncement;
+
+  HeartbeatEvent? get lastHeartbeat {
+    for (final event in events.reversed) {
+      if (event case HeartbeatEvent()) {
+        return event;
+      }
+    }
+    return null;
+  }
+
+  Set<TelemetryKind> get observedTelemetryKinds => {
+    for (final event in events)
+      if (event case TelemetryEvent(:final kind)) kind,
+  };
+
+  ObservabilityState copyWith({
+    ObservationStatus? status,
+    List<ObservedEvent>? events,
+    int? parserDropCount,
+    int? semanticDropCount,
+    int? coalescedAlertCount,
+    DateTime? lastFrameAt,
+    String? accessibilityAnnouncement,
+    bool replaceAccessibilityAnnouncement = false,
+  }) {
+    return ObservabilityState(
+      sourceLabel: sourceLabel,
+      isReplay: isReplay,
+      status: status ?? this.status,
+      events: events ?? this.events,
+      parserDropCount: parserDropCount ?? this.parserDropCount,
+      semanticDropCount: semanticDropCount ?? this.semanticDropCount,
+      coalescedAlertCount: coalescedAlertCount ?? this.coalescedAlertCount,
+      lastFrameAt: lastFrameAt ?? this.lastFrameAt,
+      accessibilityAnnouncement: replaceAccessibilityAnnouncement
+          ? accessibilityAnnouncement
+          : this.accessibilityAnnouncement,
+    );
+  }
+}
+
+class _AnnouncementDecision {
+  const _AnnouncementDecision({this.message, this.coalesced = false});
+
+  final String? message;
+  final bool coalesced;
+}
diff --git a/ground-suite/lib/features/overview/presentation/overview_page.dart b/ground-suite/lib/features/overview/presentation/overview_page.dart
new file mode 100644
index 0000000..1591fe2
--- /dev/null
+++ b/ground-suite/lib/features/overview/presentation/overview_page.dart
@@ -0,0 +1,147 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../observability/presentation/observability_controller.dart';
+
+class OverviewPage extends ConsumerWidget {
+  const OverviewPage({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final state = ref.watch(observabilityControllerProvider);
+    final heartbeat = state.lastHeartbeat;
+    final telemetry = state.observedTelemetryKinds
+        .map((kind) => kind.label)
+        .join(', ');
+    final identity = heartbeat == null
+        ? 'Not observed'
+        : 'System ${heartbeat.systemId} / component ${heartbeat.componentId}';
+    final identityDetail = heartbeat == null
+        ? 'Awaiting HEARTBEAT.'
+        : 'Reported by last HEARTBEAT: '
+              '${heartbeat.armed ? 'Armed' : 'Disarmed'} · ${heartbeat.vehicleState}';
+
+    return LayoutBuilder(
+      builder: (context, constraints) {
+        final horizontalPadding = constraints.maxWidth < 600 ? 16.0 : 24.0;
+        final cardWidth = constraints.maxWidth < 640
+            ? constraints.maxWidth - (horizontalPadding * 2)
+            : 280.0;
+
+        return ListView(
+          padding: EdgeInsets.all(horizontalPadding),
+          children: [
+            Text('Overview', style: Theme.of(context).textTheme.headlineMedium),
+            const SizedBox(height: 8),
+            const Text(
+              'This workspace is receive-only. A link or replay never implies a '
+              'safe, armed, or command-capable vehicle.',
+            ),
+            const SizedBox(height: 24),
+            Wrap(
+              spacing: 16,
+              runSpacing: 16,
+              children: [
+                _SummaryCard(
+                  title: 'Source',
+                  value: state.sourceLabel,
+                  width: cardWidth,
+                  detail: state.isReplay
+                      ? 'Deterministic replay; no physical vehicle is connected.'
+                      : 'Receive-only transport.',
+                  icon: Icons.visibility_outlined,
+                ),
+                _SummaryCard(
+                  title: 'Vehicle identity',
+                  value: identity,
+                  detail: identityDetail,
+                  width: cardWidth,
+                  icon: Icons.memory_outlined,
+                ),
+                _SummaryCard(
+                  title: 'Observed streams',
+                  value: telemetry.isEmpty ? 'None' : telemetry,
+                  detail: state.isReplay
+                      ? '${state.events.length} replayed observation(s).'
+                      : '${state.events.length} observation(s).',
+                  width: cardWidth,
+                  icon: Icons.sensors_outlined,
+                ),
+                _SummaryCard(
+                  title: 'Decoder accounting',
+                  value:
+                      '${state.parserDropCount} parser / ${state.semanticDropCount} semantic',
+                  detail: 'Counters are zero in the typed replay fixture.',
+                  width: cardWidth,
+                  icon: Icons.rule_outlined,
+                ),
+              ],
+            ),
+            const SizedBox(height: 24),
+            Card(
+              child: Padding(
+                padding: const EdgeInsets.all(20),
+                child: Column(
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Text(
+                      'Configuration is unavailable',
+                      style: Theme.of(context).textTheme.titleLarge,
+                    ),
+                    const SizedBox(height: 8),
+                    const Text(
+                      'Kaptan firmware does not yet accept inbound configuration '
+                      'authority. Ground Suite will not show upload, commit, arm, '
+                      'or shutdown controls until the firmware exposes reviewed '
+                      'authenticated ingress and safe activation.',
+                    ),
+                  ],
+                ),
+              ),
+            ),
+          ],
+        );
+      },
+    );
+  }
+}
+
+class _SummaryCard extends StatelessWidget {
+  const _SummaryCard({
+    required this.title,
+    required this.value,
+    required this.detail,
+    required this.icon,
+    required this.width,
+  });
+
+  final String title;
+  final String value;
+  final String detail;
+  final IconData icon;
+  final double width;
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox(
+      width: width,
+      child: Card(
+        child: Padding(
+          padding: const EdgeInsets.all(20),
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              Icon(icon),
+              const SizedBox(height: 16),
+              Text(title, style: Theme.of(context).textTheme.labelLarge),
+              const SizedBox(height: 4),
+              Text(value, style: Theme.of(context).textTheme.titleLarge),
+              const SizedBox(height: 8),
+              Text(detail),
+            ],
+          ),
+        ),
+      ),
+    );
+  }
+}
diff --git a/ground-suite/lib/main.dart b/ground-suite/lib/main.dart
new file mode 100644
index 0000000..1a337a8
--- /dev/null
+++ b/ground-suite/lib/main.dart
@@ -0,0 +1,8 @@
+import 'package:flutter/widgets.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import 'app/app.dart';
+
+void main() {
+  runApp(const ProviderScope(child: GroundSuiteApp()));
+}
diff --git a/ground-suite/lib/shared/widgets/severity_badge.dart b/ground-suite/lib/shared/widgets/severity_badge.dart
new file mode 100644
index 0000000..43816fe
--- /dev/null
+++ b/ground-suite/lib/shared/widgets/severity_badge.dart
@@ -0,0 +1,25 @@
+import 'package:flutter/material.dart';
+
+import '../../core/observations/observed_event.dart';
+
+class SeverityBadge extends StatelessWidget {
+  const SeverityBadge({required this.level, super.key});
+
+  final MavSeverity level;
+
+  @override
+  Widget build(BuildContext context) {
+    final (icon, color) = switch (level.wireValue) {
+      0 || 1 || 2 || 3 => (Icons.error_outline, Colors.red.shade700),
+      4 => (Icons.warning_amber_outlined, Colors.orange.shade800),
+      5 || 6 => (Icons.info_outline, Colors.blue.shade700),
+      7 => (Icons.bug_report_outlined, Colors.grey.shade700),
+      _ => (Icons.help_outline, Colors.grey.shade700),
+    };
+
+    return Semantics(
+      label: 'Severity: ${level.label}',
+      child: Icon(icon, color: color),
+    );
+  }
+}
diff --git a/ground-suite/linux/.gitignore b/ground-suite/linux/.gitignore
new file mode 100644
index 0000000..d3896c9
--- /dev/null
+++ b/ground-suite/linux/.gitignore
@@ -0,0 +1 @@
+flutter/ephemeral
diff --git a/ground-suite/linux/CMakeLists.txt b/ground-suite/linux/CMakeLists.txt
new file mode 100644
index 0000000..702cdf2
--- /dev/null
+++ b/ground-suite/linux/CMakeLists.txt
@@ -0,0 +1,128 @@
+# Project-level configuration.
+cmake_minimum_required(VERSION 3.13)
+project(runner LANGUAGES CXX)
+
+# The name of the executable created for the application. Change this to change
+# the on-disk name of your application.
+set(BINARY_NAME "ground_suite")
+# The unique GTK application identifier for this application. See:
+# https://wiki.gnome.org/HowDoI/ChooseApplicationID
+set(APPLICATION_ID "com.orkavian.ground_suite")
+
+# Explicitly opt in to modern CMake behaviors to avoid warnings with recent
+# versions of CMake.
+cmake_policy(SET CMP0063 NEW)
+
+# Load bundled libraries from the lib/ directory relative to the binary.
+set(CMAKE_INSTALL_RPATH "$ORIGIN/lib")
+
+# Root filesystem for cross-building.
+if(FLUTTER_TARGET_PLATFORM_SYSROOT)
+  set(CMAKE_SYSROOT ${FLUTTER_TARGET_PLATFORM_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH ${CMAKE_SYSROOT})
+  set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
+  set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
+  set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
+endif()
+
+# Define build configuration options.
+if(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
+  set(CMAKE_BUILD_TYPE "Debug" CACHE
+    STRING "Flutter build mode" FORCE)
+  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS
+    "Debug" "Profile" "Release")
+endif()
+
+# Compilation settings that should be applied to most targets.
+#
+# Be cautious about adding new options here, as plugins use this function by
+# default. In most cases, you should add new options to specific targets instead
+# of modifying this function.
+function(APPLY_STANDARD_SETTINGS TARGET)
+  target_compile_features(${TARGET} PUBLIC cxx_std_14)
+  target_compile_options(${TARGET} PRIVATE -Wall -Werror)
+  target_compile_options(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:-O3>")
+  target_compile_definitions(${TARGET} PRIVATE "$<$<NOT:$<CONFIG:Debug>>:NDEBUG>")
+endfunction()
+
+# Flutter library and tool build rules.
+set(FLUTTER_MANAGED_DIR "${CMAKE_CURRENT_SOURCE_DIR}/flutter")
+add_subdirectory(${FLUTTER_MANAGED_DIR})
+
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+
+# Application build; see runner/CMakeLists.txt.
+add_subdirectory("runner")
+
+# Run the Flutter tool portions of the build. This must not be removed.
+add_dependencies(${BINARY_NAME} flutter_assemble)
+
+# Only the install-generated bundle's copy of the executable will launch
+# correctly, since the resources must in the right relative locations. To avoid
+# people trying to run the unbundled copy, put it in a subdirectory instead of
+# the default top-level location.
+set_target_properties(${BINARY_NAME}
+  PROPERTIES
+  RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/intermediates_do_not_run"
+)
+
+
+# Generated plugin build rules, which manage building the plugins and adding
+# them to the application.
+include(flutter/generated_plugins.cmake)
+
+
+# === Installation ===
+# By default, "installing" just makes a relocatable bundle in the build
+# directory.
+set(BUILD_BUNDLE_DIR "${PROJECT_BINARY_DIR}/bundle")
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  set(CMAKE_INSTALL_PREFIX "${BUILD_BUNDLE_DIR}" CACHE PATH "..." FORCE)
+endif()
+
+# Start with a clean build bundle directory every time.
+install(CODE "
+  file(REMOVE_RECURSE \"${BUILD_BUNDLE_DIR}/\")
+  " COMPONENT Runtime)
+
+set(INSTALL_BUNDLE_DATA_DIR "${CMAKE_INSTALL_PREFIX}/data")
+set(INSTALL_BUNDLE_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib")
+
+install(TARGETS ${BINARY_NAME} RUNTIME DESTINATION "${CMAKE_INSTALL_PREFIX}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_ICU_DATA_FILE}" DESTINATION "${INSTALL_BUNDLE_DATA_DIR}"
+  COMPONENT Runtime)
+
+install(FILES "${FLUTTER_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+  COMPONENT Runtime)
+
+foreach(bundled_library ${PLUGIN_BUNDLED_LIBRARIES})
+  install(FILES "${bundled_library}"
+    DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endforeach(bundled_library)
+
+# Copy the native assets provided by the build.dart from all packages.
+set(NATIVE_ASSETS_DIR "${PROJECT_BUILD_DIR}native_assets/linux/")
+install(DIRECTORY "${NATIVE_ASSETS_DIR}"
+   DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+   COMPONENT Runtime)
+
+# Fully re-copy the assets directory on each build to avoid having stale files
+# from a previous install.
+set(FLUTTER_ASSET_DIR_NAME "flutter_assets")
+install(CODE "
+  file(REMOVE_RECURSE \"${INSTALL_BUNDLE_DATA_DIR}/${FLUTTER_ASSET_DIR_NAME}\")
+  " COMPONENT Runtime)
+install(DIRECTORY "${PROJECT_BUILD_DIR}/${FLUTTER_ASSET_DIR_NAME}"
+  DESTINATION "${INSTALL_BUNDLE_DATA_DIR}" COMPONENT Runtime)
+
+# Install the AOT library on non-Debug builds only.
+if(NOT CMAKE_BUILD_TYPE MATCHES "Debug")
+  install(FILES "${AOT_LIBRARY}" DESTINATION "${INSTALL_BUNDLE_LIB_DIR}"
+    COMPONENT Runtime)
+endif()
diff --git a/ground-suite/linux/flutter/CMakeLists.txt b/ground-suite/linux/flutter/CMakeLists.txt
new file mode 100644
index 0000000..d5bd016
--- /dev/null
+++ b/ground-suite/linux/flutter/CMakeLists.txt
@@ -0,0 +1,88 @@
+# This file controls Flutter-level build steps. It should not be edited.
+cmake_minimum_required(VERSION 3.10)
+
+set(EPHEMERAL_DIR "${CMAKE_CURRENT_SOURCE_DIR}/ephemeral")
+
+# Configuration provided via flutter tool.
+include(${EPHEMERAL_DIR}/generated_config.cmake)
+
+# TODO: Move the rest of this into files in ephemeral. See
+# https://github.com/flutter/flutter/issues/57146.
+
+# Serves the same purpose as list(TRANSFORM ... PREPEND ...),
+# which isn't available in 3.10.
+function(list_prepend LIST_NAME PREFIX)
+    set(NEW_LIST "")
+    foreach(element ${${LIST_NAME}})
+        list(APPEND NEW_LIST "${PREFIX}${element}")
+    endforeach(element)
+    set(${LIST_NAME} "${NEW_LIST}" PARENT_SCOPE)
+endfunction()
+
+# === Flutter Library ===
+# System-level dependencies.
+find_package(PkgConfig REQUIRED)
+pkg_check_modules(GTK REQUIRED IMPORTED_TARGET gtk+-3.0)
+pkg_check_modules(GLIB REQUIRED IMPORTED_TARGET glib-2.0)
+pkg_check_modules(GIO REQUIRED IMPORTED_TARGET gio-2.0)
+
+set(FLUTTER_LIBRARY "${EPHEMERAL_DIR}/libflutter_linux_gtk.so")
+
+# Published to parent scope for install step.
+set(FLUTTER_LIBRARY ${FLUTTER_LIBRARY} PARENT_SCOPE)
+set(FLUTTER_ICU_DATA_FILE "${EPHEMERAL_DIR}/icudtl.dat" PARENT_SCOPE)
+set(PROJECT_BUILD_DIR "${PROJECT_DIR}/build/" PARENT_SCOPE)
+set(AOT_LIBRARY "${PROJECT_DIR}/build/lib/libapp.so" PARENT_SCOPE)
+
+list(APPEND FLUTTER_LIBRARY_HEADERS
+  "fl_basic_message_channel.h"
+  "fl_binary_codec.h"
+  "fl_binary_messenger.h"
+  "fl_dart_project.h"
+  "fl_engine.h"
+  "fl_json_message_codec.h"
+  "fl_json_method_codec.h"
+  "fl_message_codec.h"
+  "fl_method_call.h"
+  "fl_method_channel.h"
+  "fl_method_codec.h"
+  "fl_method_response.h"
+  "fl_plugin_registrar.h"
+  "fl_plugin_registry.h"
+  "fl_standard_message_codec.h"
+  "fl_standard_method_codec.h"
+  "fl_string_codec.h"
+  "fl_value.h"
+  "fl_view.h"
+  "flutter_linux.h"
+)
+list_prepend(FLUTTER_LIBRARY_HEADERS "${EPHEMERAL_DIR}/flutter_linux/")
+add_library(flutter INTERFACE)
+target_include_directories(flutter INTERFACE
+  "${EPHEMERAL_DIR}"
+)
+target_link_libraries(flutter INTERFACE "${FLUTTER_LIBRARY}")
+target_link_libraries(flutter INTERFACE
+  PkgConfig::GTK
+  PkgConfig::GLIB
+  PkgConfig::GIO
+)
+add_dependencies(flutter flutter_assemble)
+
+# === Flutter tool backend ===
+# _phony_ is a non-existent file to force this command to run every time,
+# since currently there's no way to get a full input/output list from the
+# flutter tool.
+add_custom_command(
+  OUTPUT ${FLUTTER_LIBRARY} ${FLUTTER_LIBRARY_HEADERS}
+    ${CMAKE_CURRENT_BINARY_DIR}/_phony_
+  COMMAND ${CMAKE_COMMAND} -E env
+    ${FLUTTER_TOOL_ENVIRONMENT}
+    "${FLUTTER_ROOT}/packages/flutter_tools/bin/tool_backend.sh"
+      ${FLUTTER_TARGET_PLATFORM} ${CMAKE_BUILD_TYPE}
+  VERBATIM
+)
+add_custom_target(flutter_assemble DEPENDS
+  "${FLUTTER_LIBRARY}"
+  ${FLUTTER_LIBRARY_HEADERS}
+)
diff --git a/ground-suite/linux/flutter/generated_plugin_registrant.cc b/ground-suite/linux/flutter/generated_plugin_registrant.cc
new file mode 100644
index 0000000..e71a16d
--- /dev/null
+++ b/ground-suite/linux/flutter/generated_plugin_registrant.cc
@@ -0,0 +1,11 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+
+void fl_register_plugins(FlPluginRegistry* registry) {
+}
diff --git a/ground-suite/linux/flutter/generated_plugin_registrant.h b/ground-suite/linux/flutter/generated_plugin_registrant.h
new file mode 100644
index 0000000..e0f0a47
--- /dev/null
+++ b/ground-suite/linux/flutter/generated_plugin_registrant.h
@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#ifndef GENERATED_PLUGIN_REGISTRANT_
+#define GENERATED_PLUGIN_REGISTRANT_
+
+#include <flutter_linux/flutter_linux.h>
+
+// Registers Flutter plugins.
+void fl_register_plugins(FlPluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_
diff --git a/ground-suite/linux/flutter/generated_plugins.cmake b/ground-suite/linux/flutter/generated_plugins.cmake
new file mode 100644
index 0000000..2e1de87
--- /dev/null
+++ b/ground-suite/linux/flutter/generated_plugins.cmake
@@ -0,0 +1,23 @@
+#
+# Generated file, do not edit.
+#
+
+list(APPEND FLUTTER_PLUGIN_LIST
+)
+
+list(APPEND FLUTTER_FFI_PLUGIN_LIST
+)
+
+set(PLUGIN_BUNDLED_LIBRARIES)
+
+foreach(plugin ${FLUTTER_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${plugin}/linux plugins/${plugin})
+  target_link_libraries(${BINARY_NAME} PRIVATE ${plugin}_plugin)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES $<TARGET_FILE:${plugin}_plugin>)
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
+endforeach(plugin)
+
+foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
+  add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/linux plugins/${ffi_plugin})
+  list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
+endforeach(ffi_plugin)
diff --git a/ground-suite/linux/runner/CMakeLists.txt b/ground-suite/linux/runner/CMakeLists.txt
new file mode 100644
index 0000000..e97dabc
--- /dev/null
+++ b/ground-suite/linux/runner/CMakeLists.txt
@@ -0,0 +1,26 @@
+cmake_minimum_required(VERSION 3.13)
+project(runner LANGUAGES CXX)
+
+# Define the application target. To change its name, change BINARY_NAME in the
+# top-level CMakeLists.txt, not the value here, or `flutter run` will no longer
+# work.
+#
+# Any new source files that you add to the application should be added here.
+add_executable(${BINARY_NAME}
+  "main.cc"
+  "my_application.cc"
+  "${FLUTTER_MANAGED_DIR}/generated_plugin_registrant.cc"
+)
+
+# Apply the standard set of build settings. This can be removed for applications
+# that need different build settings.
+apply_standard_settings(${BINARY_NAME})
+
+# Add preprocessor definitions for the application ID.
+add_definitions(-DAPPLICATION_ID="${APPLICATION_ID}")
+
+# Add dependency libraries. Add any application-specific dependencies here.
+target_link_libraries(${BINARY_NAME} PRIVATE flutter)
+target_link_libraries(${BINARY_NAME} PRIVATE PkgConfig::GTK)
+
+target_include_directories(${BINARY_NAME} PRIVATE "${CMAKE_SOURCE_DIR}")
diff --git a/ground-suite/linux/runner/main.cc b/ground-suite/linux/runner/main.cc
new file mode 100644
index 0000000..e7c5c54
--- /dev/null
+++ b/ground-suite/linux/runner/main.cc
@@ -0,0 +1,6 @@
+#include "my_application.h"
+
+int main(int argc, char** argv) {
+  g_autoptr(MyApplication) app = my_application_new();
+  return g_application_run(G_APPLICATION(app), argc, argv);
+}
diff --git a/ground-suite/linux/runner/my_application.cc b/ground-suite/linux/runner/my_application.cc
new file mode 100644
index 0000000..2c93a65
--- /dev/null
+++ b/ground-suite/linux/runner/my_application.cc
@@ -0,0 +1,148 @@
+#include "my_application.h"
+
+#include <flutter_linux/flutter_linux.h>
+#ifdef GDK_WINDOWING_X11
+#include <gdk/gdkx.h>
+#endif
+
+#include "flutter/generated_plugin_registrant.h"
+
+struct _MyApplication {
+  GtkApplication parent_instance;
+  char** dart_entrypoint_arguments;
+};
+
+G_DEFINE_TYPE(MyApplication, my_application, GTK_TYPE_APPLICATION)
+
+// Called when first Flutter frame received.
+static void first_frame_cb(MyApplication* self, FlView* view) {
+  gtk_widget_show(gtk_widget_get_toplevel(GTK_WIDGET(view)));
+}
+
+// Implements GApplication::activate.
+static void my_application_activate(GApplication* application) {
+  MyApplication* self = MY_APPLICATION(application);
+  GtkWindow* window =
+      GTK_WINDOW(gtk_application_window_new(GTK_APPLICATION(application)));
+
+  // Use a header bar when running in GNOME as this is the common style used
+  // by applications and is the setup most users will be using (e.g. Ubuntu
+  // desktop).
+  // If running on X and not using GNOME then just use a traditional title bar
+  // in case the window manager does more exotic layout, e.g. tiling.
+  // If running on Wayland assume the header bar will work (may need changing
+  // if future cases occur).
+  gboolean use_header_bar = TRUE;
+#ifdef GDK_WINDOWING_X11
+  GdkScreen* screen = gtk_window_get_screen(window);
+  if (GDK_IS_X11_SCREEN(screen)) {
+    const gchar* wm_name = gdk_x11_screen_get_window_manager_name(screen);
+    if (g_strcmp0(wm_name, "GNOME Shell") != 0) {
+      use_header_bar = FALSE;
+    }
+  }
+#endif
+  if (use_header_bar) {
+    GtkHeaderBar* header_bar = GTK_HEADER_BAR(gtk_header_bar_new());
+    gtk_widget_show(GTK_WIDGET(header_bar));
+    gtk_header_bar_set_title(header_bar, "Ground Suite");
+    gtk_header_bar_set_show_close_button(header_bar, TRUE);
+    gtk_window_set_titlebar(window, GTK_WIDGET(header_bar));
+  } else {
+    gtk_window_set_title(window, "Ground Suite");
+  }
+
+  gtk_window_set_default_size(window, 1280, 720);
+
+  g_autoptr(FlDartProject) project = fl_dart_project_new();
+  fl_dart_project_set_dart_entrypoint_arguments(
+      project, self->dart_entrypoint_arguments);
+
+  FlView* view = fl_view_new(project);
+  GdkRGBA background_color;
+  // Background defaults to black, override it here if necessary, e.g. #00000000
+  // for transparent.
+  gdk_rgba_parse(&background_color, "#000000");
+  fl_view_set_background_color(view, &background_color);
+  gtk_widget_show(GTK_WIDGET(view));
+  gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(view));
+
+  // Show the window when Flutter renders.
+  // Requires the view to be realized so we can start rendering.
+  g_signal_connect_swapped(view, "first-frame", G_CALLBACK(first_frame_cb),
+                           self);
+  gtk_widget_realize(GTK_WIDGET(view));
+
+  fl_register_plugins(FL_PLUGIN_REGISTRY(view));
+
+  gtk_widget_grab_focus(GTK_WIDGET(view));
+}
+
+// Implements GApplication::local_command_line.
+static gboolean my_application_local_command_line(GApplication* application,
+                                                  gchar*** arguments,
+                                                  int* exit_status) {
+  MyApplication* self = MY_APPLICATION(application);
+  // Strip out the first argument as it is the binary name.
+  self->dart_entrypoint_arguments = g_strdupv(*arguments + 1);
+
+  g_autoptr(GError) error = nullptr;
+  if (!g_application_register(application, nullptr, &error)) {
+    g_warning("Failed to register: %s", error->message);
+    *exit_status = 1;
+    return TRUE;
+  }
+
+  g_application_activate(application);
+  *exit_status = 0;
+
+  return TRUE;
+}
+
+// Implements GApplication::startup.
+static void my_application_startup(GApplication* application) {
+  // MyApplication* self = MY_APPLICATION(object);
+
+  // Perform any actions required at application startup.
+
+  G_APPLICATION_CLASS(my_application_parent_class)->startup(application);
+}
+
+// Implements GApplication::shutdown.
+static void my_application_shutdown(GApplication* application) {
+  // MyApplication* self = MY_APPLICATION(object);
+
+  // Perform any actions required at application shutdown.
+
+  G_APPLICATION_CLASS(my_application_parent_class)->shutdown(application);
+}
+
+// Implements GObject::dispose.
+static void my_application_dispose(GObject* object) {
+  MyApplication* self = MY_APPLICATION(object);
+  g_clear_pointer(&self->dart_entrypoint_arguments, g_strfreev);
+  G_OBJECT_CLASS(my_application_parent_class)->dispose(object);
+}
+
+static void my_application_class_init(MyApplicationClass* klass) {
+  G_APPLICATION_CLASS(klass)->activate = my_application_activate;
+  G_APPLICATION_CLASS(klass)->local_command_line =
+      my_application_local_command_line;
+  G_APPLICATION_CLASS(klass)->startup = my_application_startup;
+  G_APPLICATION_CLASS(klass)->shutdown = my_application_shutdown;
+  G_OBJECT_CLASS(klass)->dispose = my_application_dispose;
+}
+
+static void my_application_init(MyApplication* self) {}
+
+MyApplication* my_application_new() {
+  // Set the program name to the application ID, which helps various systems
+  // like GTK and desktop environments map this running application to its
+  // corresponding .desktop file. This ensures better integration by allowing
+  // the application to be recognized beyond its binary name.
+  g_set_prgname(APPLICATION_ID);
+
+  return MY_APPLICATION(g_object_new(my_application_get_type(),
+                                     "application-id", APPLICATION_ID, "flags",
+                                     G_APPLICATION_NON_UNIQUE, nullptr));
+}
diff --git a/ground-suite/linux/runner/my_application.h b/ground-suite/linux/runner/my_application.h
new file mode 100644
index 0000000..db16367
--- /dev/null
+++ b/ground-suite/linux/runner/my_application.h
@@ -0,0 +1,21 @@
+#ifndef FLUTTER_MY_APPLICATION_H_
+#define FLUTTER_MY_APPLICATION_H_
+
+#include <gtk/gtk.h>
+
+G_DECLARE_FINAL_TYPE(MyApplication,
+                     my_application,
+                     MY,
+                     APPLICATION,
+                     GtkApplication)
+
+/**
+ * my_application_new:
+ *
+ * Creates a new Flutter-based application.
+ *
+ * Returns: a new #MyApplication.
+ */
+MyApplication* my_application_new();
+
+#endif  // FLUTTER_MY_APPLICATION_H_
diff --git a/ground-suite/pubspec.lock b/ground-suite/pubspec.lock
new file mode 100644
index 0000000..e86079d
--- /dev/null
+++ b/ground-suite/pubspec.lock
@@ -0,0 +1,525 @@
+# Generated by pub
+# See https://dart.dev/tools/pub/glossary#lockfile
+packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      sha256: a49d6cf99e8d8e7a8e93668d09ced0bbdb954d0b4fccc2f5f9241c6b87fad95c
+      url: "https://pub.dev"
+    source: hosted
+    version: "99.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      sha256: "663efa951fb8a45e06f491223a604c93820598f20e6a99c25617a1576065e8b7"
+      url: "https://pub.dev"
+    source: hosted
+    version: "12.1.0"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      sha256: d0481093c50b1da8910eb0bb301626d4d8eb7284aa739614d2b394ee09e3ea04
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.7.0"
+  async:
+    dependency: transitive
+    description:
+      name: async
+      sha256: e2eb0491ba5ddb6177742d2da23904574082139b07c1e33b8503b9f46f3e1a37
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.13.1"
+  boolean_selector:
+    dependency: transitive
+    description:
+      name: boolean_selector
+      sha256: "8aab1771e1243a5063b8b0ff68042d67334e3feab9e95b9490f9a6ebf73b42ea"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  characters:
+    dependency: transitive
+    description:
+      name: characters
+      sha256: faf38497bda5ead2a8c7615f4f7939df04333478bf32e4173fcb06d428b5716b
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.1"
+  cli_config:
+    dependency: transitive
+    description:
+      name: cli_config
+      sha256: ac20a183a07002b700f0c25e61b7ee46b23c309d76ab7b7640a028f18e4d99ec
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.2.0"
+  clock:
+    dependency: transitive
+    description:
+      name: clock
+      sha256: fddb70d9b5277016c77a80201021d40a2247104d9f4aa7bab7157b7e3f05b84b
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.2"
+  collection:
+    dependency: transitive
+    description:
+      name: collection
+      sha256: "2f5709ae4d3d59dd8f7cd309b4e023046b57d8a6c82130785d2b0e5868084e76"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.19.1"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      sha256: b30acd5944035672bc15c6b7a8b47d773e41e2f17de064350988c5d02adb1c68
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.2"
+  coverage:
+    dependency: transitive
+    description:
+      name: coverage
+      sha256: "956a3de0725ca232ad353565a8290d3357592bf4250f6f298a185e2d949c5d3d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.15.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      sha256: c8ea0233063ba03258fbcf2ca4d6dadfefe14f02fab57702265467a19f27fadf
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.7"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      sha256: "5368f224a74523e8d2e7399ea1638b37aecfca824a3cc4dfdf77bf1fa905ac44"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.3"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      sha256: a3b4f84adafef897088c160faf7dfffb7696046cb13ae90b508c2cbc95d3b8d4
+      url: "https://pub.dev"
+    source: hosted
+    version: "7.0.1"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      sha256: b6dc7065e46c974bc7c5f143080a6764ec7a4be6da1285ececdc37be96de53be
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  flutter:
+    dependency: "direct main"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      sha256: "3105dc8492f6183fb076ccf1f351ac3d60564bff92e20bfc4af9cc1651f4e7e1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.0.0"
+  flutter_riverpod:
+    dependency: "direct main"
+    description:
+      name: flutter_riverpod
+      sha256: "56e81e662e6e54e59b231da57e90ac0d06ac67d8e3f2273c129a37ae6282b40c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.4.2"
+  flutter_test:
+    dependency: "direct dev"
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      sha256: f64a0333a82f30b0cca061bc3d143813a486dc086b574bfb233b7c1372427694
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.0"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      sha256: c3f1ee72c96f8f78935e18aa8cecced9ab132419e8625dc187e1c2408efc20de
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.3"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      sha256: aa6199f908078bb1c5efb8d8638d4ae191aac11b311132c3ef48ce352fb52ef8
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.2"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "178d74305e7866013777bab2c3d8726205dc5a4dd935297175b19a23a2e66571"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.1.2"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      sha256: dfd5a80599cf0165756e3181807ed3e77daf6dd4137caaad72d0b7931597650b
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.5"
+  leak_tracker:
+    dependency: transitive
+    description:
+      name: leak_tracker
+      sha256: "33e2e26bdd85a0112ec15400c8cbffea70d0f9c3407491f672a2fad47915e2de"
+      url: "https://pub.dev"
+    source: hosted
+    version: "11.0.2"
+  leak_tracker_flutter_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_flutter_testing
+      sha256: "1dbc140bb5a23c75ea9c4811222756104fbcd1a27173f0c34ca01e16bea473c1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.10"
+  leak_tracker_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_testing
+      sha256: "8d5a2d49f4a66b49744b23b018848400d23e54caf9463f4eb20df3eb8acb2eb1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  lints:
+    dependency: transitive
+    description:
+      name: lints
+      sha256: "12f842a479589fea194fe5c5a3095abc7be0c1f2ddfa9a0e76aed1dbd26a87df"
+      url: "https://pub.dev"
+    source: hosted
+    version: "6.1.0"
+  listen:
+    dependency: transitive
+    description:
+      name: listen
+      sha256: "47501a08016a43fcad79252439d723f50f14f88fa7bfd8a177e0a417e5c9e1f2"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.1"
+  logging:
+    dependency: transitive
+    description:
+      name: logging
+      sha256: c8245ada5f1717ed44271ed1c26b8ce85ca3228fd2ffdb75468ab01979309d61
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.0"
+  matcher:
+    dependency: transitive
+    description:
+      name: matcher
+      sha256: dc0b7dc7651697ea4ff3e69ef44b0407ea32c487a39fff6a4004fa585e901861
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.12.19"
+  material_color_utilities:
+    dependency: transitive
+    description:
+      name: material_color_utilities
+      sha256: "9c337007e82b1889149c82ed242ed1cb24a66044e30979c44912381e9be4c48b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.13.0"
+  meta:
+    dependency: transitive
+    description:
+      name: meta
+      sha256: "1741988757a65eb6b36abe716829688cf01910bbf91c34354ff7ec1c3de2b349"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.18.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      sha256: "41a20518f0cb1256669420fdba0cd90d21561e560ac240f26ef8322e45bb7ed6"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.0"
+  node_preamble:
+    dependency: transitive
+    description:
+      name: node_preamble
+      sha256: "6e7eac89047ab8a8d26cf16127b5ed26de65209847630400f9aefd7cd5c730db"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.0.2"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      sha256: f096c55ebb7deb7e384101542bfba8c52696c1b56fca2eb62827989ef2353bbc
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  path:
+    dependency: transitive
+    description:
+      name: path
+      sha256: "75cca69d1490965be98c73ceaea117e8a04dd21217b37b292c9ddbec0d955bc5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.9.1"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      sha256: "978783255c543aa3586a1b3c21f6e9d720eb315376a915872c61ef8b5c20177d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.5.2"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      sha256: "5bfcf68ca79ef689f8990d1160781b4bad40a3bd5e5218ad4076ddb7f4081585"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  riverpod:
+    dependency: transitive
+    description:
+      name: riverpod
+      sha256: "84351b3472a447f7b89f961f95c73287009d58c59d8cc1267425d995f78e50f1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.4.2"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      sha256: e7dd780a7ffb623c57850b33f43309312fc863fb6aa3d276a754bb299839ef12
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.2"
+  shelf_packages_handler:
+    dependency: transitive
+    description:
+      name: shelf_packages_handler
+      sha256: "89f967eca29607c933ba9571d838be31d67f53f6e4ee15147d5dc2934fee1b1e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.2"
+  shelf_static:
+    dependency: transitive
+    description:
+      name: shelf_static
+      sha256: c87c3875f91262785dade62d135760c2c69cb217ac759485334c5857ad89f6e3
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.3"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      sha256: "3632775c8e90d6c9712f883e633716432a27758216dfb61bd86a8321c0580925"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.0"
+  sky_engine:
+    dependency: transitive
+    description: flutter
+    source: sdk
+    version: "0.0.0"
+  source_map_stack_trace:
+    dependency: transitive
+    description:
+      name: source_map_stack_trace
+      sha256: c0713a43e323c3302c2abe2a1cc89aa057a387101ebd280371d6a6c9fa68516b
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.2"
+  source_maps:
+    dependency: transitive
+    description:
+      name: source_maps
+      sha256: "190222579a448b03896e0ca6eca5998fa810fda630c1d65e2f78b3f638f54812"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.10.13"
+  source_span:
+    dependency: transitive
+    description:
+      name: source_span
+      sha256: "56a02f1f4cd1a2d96303c0144c93bd6d909eea6bee6bf5a0e0b685edbd4c47ab"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.10.2"
+  stack_trace:
+    dependency: transitive
+    description:
+      name: stack_trace
+      sha256: "8b27215b45d22309b5cddda1aa2b19bdfec9df0e765f2de506401c071d38d1b1"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.12.1"
+  state_notifier:
+    dependency: transitive
+    description:
+      name: state_notifier
+      sha256: b8677376aa54f2d7c58280d5a007f9e8774f1968d1fb1c096adcb4792fba29bb
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
+  stream_channel:
+    dependency: transitive
+    description:
+      name: stream_channel
+      sha256: "969e04c80b8bcdf826f8f16579c7b14d780458bd97f56d107d3950fdbeef059d"
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.1.4"
+  string_scanner:
+    dependency: transitive
+    description:
+      name: string_scanner
+      sha256: "921cd31725b72fe181906c6a94d987c78e3b98c2e205b397ea399d4054872b43"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.1"
+  term_glyph:
+    dependency: transitive
+    description:
+      name: term_glyph
+      sha256: "7f554798625ea768a7518313e58f83891c7f5024f88e46e7182a4558850a4b8e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.2"
+  test:
+    dependency: transitive
+    description:
+      name: test
+      sha256: "8d9ceddbab833f180fbefed08afa76d7c03513dfdba87ffcec2718b02bbcbf20"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.31.0"
+  test_api:
+    dependency: transitive
+    description:
+      name: test_api
+      sha256: "949a932224383300f01be9221c39180316445ecb8e7547f70a41a35bf421fb9e"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.7.11"
+  test_core:
+    dependency: transitive
+    description:
+      name: test_core
+      sha256: "1991d4cfe85d5043241acac92962c3977c8d2f2add1ee73130c7b286417d1d34"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.6.17"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: f9049c039ebfeb4cf7a7104a675823cd72dba8297f264b6637062516699fa006
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.4.0"
+  uuid:
+    dependency: transitive
+    description:
+      name: uuid
+      sha256: "9b129329f58692f6e6578329498a8fe9fbe98f090beb764ffbb8ee2eadd01dcd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.6.0"
+  vector_math:
+    dependency: transitive
+    description:
+      name: vector_math
+      sha256: d530bd74fea330e6e364cda7a85019c434070188383e1cd8d9777ee586914c5b
+      url: "https://pub.dev"
+    source: hosted
+    version: "2.2.0"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      sha256: "0016aef94fc66495ac78af5859181e3f3bf2026bd8eecc72b9565601e19ab360"
+      url: "https://pub.dev"
+    source: hosted
+    version: "15.2.0"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      sha256: "1398c9f081a753f9226febe8900fce8f7d0a67163334e1c94a2438339d79d635"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: "868d88a33d8a87b18ffc05f9f030ba328ffefba92d6c127917a2ba740f9cfe4a"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.1"
+  web_socket:
+    dependency: transitive
+    description:
+      name: web_socket
+      sha256: "34d64019aa8e36bf9842ac014bb5d2f5586ca73df5e4d9bf5c936975cae6982c"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.1"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      sha256: d645757fb0f4773d602444000a8131ff5d48c9e47adfe9772652dd1a4f2d45c8
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.0.3"
+  webkit_inspection_protocol:
+    dependency: transitive
+    description:
+      name: webkit_inspection_protocol
+      sha256: "87d3f2333bb240704cd3f1c6b5b7acd8a10e7f0bc28c28dcf14e782014f4a572"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.1"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      sha256: b9da305ac7c39faa3f030eccd175340f968459dae4af175130b3fc47e40d76ce
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.1.3"
+sdks:
+  dart: ">=3.12.2 <4.0.0"
+  flutter: ">=3.18.0-18.0.pre.54"
diff --git a/ground-suite/pubspec.yaml b/ground-suite/pubspec.yaml
new file mode 100644
index 0000000..a1f2b92
--- /dev/null
+++ b/ground-suite/pubspec.yaml
@@ -0,0 +1,87 @@
+name: ground_suite
+description: "Kaptan's desktop ground-control observability console."
+# The following line prevents the package from being accidentally published to
+# pub.dev using `flutter pub publish`. This is preferred for private packages.
+publish_to: 'none' # Remove this line if you wish to publish to pub.dev
+
+# The following defines the version and build number for your application.
+# A version number is three numbers separated by dots, like 1.2.43
+# followed by an optional build number separated by a +.
+# Both the version and the builder number may be overridden in flutter
+# build by specifying --build-name and --build-number, respectively.
+# In Android, build-name is used as versionName while build-number used as versionCode.
+# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
+# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
+# Read more about iOS versioning at
+# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
+# In Windows, build-name is used as the major, minor, and patch parts
+# of the product and file versions while build-number is used as the build suffix.
+version: 0.1.0+1
+
+environment:
+  sdk: ^3.12.2
+
+# Dependencies specify other packages that your package needs in order to work.
+# To automatically upgrade your package dependencies to the latest versions
+# consider running `flutter pub upgrade --major-versions`. Alternatively,
+# dependencies can be manually updated by changing the version numbers below to
+# the latest version available on pub.dev. To see which dependencies have newer
+# versions available, run `flutter pub outdated`.
+dependencies:
+  flutter:
+    sdk: flutter
+
+  flutter_riverpod: ^3.4.2
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+  # The "flutter_lints" package below contains a set of recommended lints to
+  # encourage good coding practices. The lint set provided by the package is
+  # activated in the `analysis_options.yaml` file located at the root of your
+  # package. See that file for information about deactivating specific lint
+  # rules and activating additional ones.
+  flutter_lints: ^6.0.0
+
+# For information on the generic Dart part of this file, see the
+# following page: https://dart.dev/tools/pub/pubspec
+
+# The following section is specific to Flutter packages.
+flutter:
+
+  # The following line ensures that the Material Icons font is
+  # included with your application, so that you can use the icons in
+  # the material Icons class.
+  uses-material-design: true
+
+  # To add assets to your application, add an assets section, like this:
+  # assets:
+  #   - images/a_dot_burr.jpeg
+  #   - images/a_dot_ham.jpeg
+
+  # An image asset can refer to one or more resolution-specific "variants", see
+  # https://flutter.dev/to/resolution-aware-images
+
+  # For details regarding adding assets from package dependencies, see
+  # https://flutter.dev/to/asset-from-package
+
+  # To add custom fonts to your application, add a fonts section here,
+  # in this "flutter" section. Each entry in this list should have a
+  # "family" key with the font family name, and a "fonts" key with a
+  # list giving the asset and other descriptors for the font. For
+  # example:
+  # fonts:
+  #   - family: Schyler
+  #     fonts:
+  #       - asset: fonts/Schyler-Regular.ttf
+  #       - asset: fonts/Schyler-Italic.ttf
+  #         style: italic
+  #   - family: Trajan Pro
+  #     fonts:
+  #       - asset: fonts/TrajanPro.ttf
+  #       - asset: fonts/TrajanPro_Bold.ttf
+  #         weight: 700
+  #
+  # For details regarding fonts from package dependencies,
+  # see https://flutter.dev/to/font-from-package
diff --git a/ground-suite/test/core/transport/replay_vehicle_data_port_test.dart b/ground-suite/test/core/transport/replay_vehicle_data_port_test.dart
new file mode 100644
index 0000000..4cf6318
--- /dev/null
+++ b/ground-suite/test/core/transport/replay_vehicle_data_port_test.dart
@@ -0,0 +1,30 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ground_suite/core/observations/observed_event.dart';
+import 'package:ground_suite/core/observations/vehicle_data_update.dart';
+import 'package:ground_suite/core/transport/replay_vehicle_data_port.dart';
+
+void main() {
+  test('replay covers identity, telemetry, log, error, and shutdown', () async {
+    const port = ReplayVehicleDataPort();
+
+    final events = [
+      for (final update in await port.observe().toList())
+        if (update case ObservationReceived(:final event)) event,
+    ];
+
+    expect(events.whereType<HeartbeatEvent>(), hasLength(1));
+    expect(events.whereType<TelemetryEvent>(), hasLength(2));
+    final logs = events.whereType<LogEvent>().toList();
+    final errors = events.whereType<ErrorEvent>().toList();
+    expect(logs, hasLength(2));
+    expect(errors, hasLength(1));
+    expect(events.whereType<ShutdownEvent>(), hasLength(1));
+    expect(logs.first.isCoalesced, isTrue);
+    expect(errors.single.isTruncated, isTrue);
+  });
+
+  test('unknown wire enum values remain visible', () {
+    expect(const MavSeverity(99).label, 'Unknown (99)');
+    expect(const KaptanShutdownReason(99).label, 'Unknown (99)');
+  });
+}
diff --git a/ground-suite/test/features/observability/observability_controller_test.dart b/ground-suite/test/features/observability/observability_controller_test.dart
new file mode 100644
index 0000000..90565dc
--- /dev/null
+++ b/ground-suite/test/features/observability/observability_controller_test.dart
@@ -0,0 +1,112 @@
+import 'dart:async';
+
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ground_suite/core/observations/observed_event.dart';
+import 'package:ground_suite/core/observations/vehicle_data_port.dart';
+import 'package:ground_suite/core/observations/vehicle_data_update.dart';
+import 'package:ground_suite/features/observability/presentation/observability_controller.dart';
+
+void main() {
+  test('coalesces rapid critical accessibility announcements', () async {
+    final port = _ControlledDataPort();
+    final container = ProviderContainer(
+      overrides: [vehicleDataPortProvider.overrideWithValue(port)],
+    );
+    addTearDown(container.dispose);
+
+    container.read(observabilityControllerProvider);
+    await Future<void>.delayed(Duration.zero);
+
+    port.events.add(
+      ObservationReceived(
+        ErrorEvent(
+          receivedAt: DateTime.utc(2026, 8, 10),
+          path: 'kaptan_drivers::lidar_lite_v3::error::Error::TransferFault',
+        ),
+      ),
+    );
+    await Future<void>.delayed(Duration.zero);
+
+    expect(
+      container.read(observabilityControllerProvider).accessibilityAnnouncement,
+      'Error received: kaptan_drivers::lidar_lite_v3::error::Error::TransferFault',
+    );
+
+    port.events.add(
+      ObservationReceived(
+        ShutdownEvent(
+          receivedAt: DateTime.utc(2026, 8, 10, 0, 0, 1),
+          reason: KaptanShutdownReason.safety,
+        ),
+      ),
+    );
+    await Future<void>.delayed(Duration.zero);
+
+    final state = container.read(observabilityControllerProvider);
+    expect(state.accessibilityAnnouncement, isNull);
+    expect(state.coalescedAlertCount, 1);
+  });
+
+  test(
+    'retains expected parser and semantic drops without ending observation',
+    () async {
+      final port = _ControlledDataPort();
+      final container = ProviderContainer(
+        overrides: [vehicleDataPortProvider.overrideWithValue(port)],
+      );
+      addTearDown(container.dispose);
+
+      container.read(observabilityControllerProvider);
+      await Future<void>.delayed(Duration.zero);
+
+      port.events.add(
+        const ObservationDropped(kind: ObservationDropKind.parser, count: 2),
+      );
+      port.events.add(
+        const ObservationDropped(kind: ObservationDropKind.semantic),
+      );
+      await Future<void>.delayed(Duration.zero);
+
+      final state = container.read(observabilityControllerProvider);
+      expect(state.status, ObservationStatus.receiving);
+      expect(state.parserDropCount, 2);
+      expect(state.semanticDropCount, 1);
+    },
+  );
+
+  test('treats a transport stream failure as a disconnected link', () async {
+    final port = _ControlledDataPort();
+    final container = ProviderContainer(
+      overrides: [vehicleDataPortProvider.overrideWithValue(port)],
+    );
+    addTearDown(container.dispose);
+
+    container.read(observabilityControllerProvider);
+    await Future<void>.delayed(Duration.zero);
+
+    port.events.addError(StateError('serial endpoint closed'));
+    await Future<void>.delayed(Duration.zero);
+
+    final state = container.read(observabilityControllerProvider);
+    expect(state.status, ObservationStatus.disconnected);
+    expect(state.parserDropCount, 0);
+    expect(state.semanticDropCount, 0);
+  });
+}
+
+class _ControlledDataPort implements VehicleDataPort {
+  final events = StreamController<VehicleDataUpdate>();
+
+  @override
+  bool get isReplay => false;
+
+  @override
+  String get label => 'Test transport';
+
+  @override
+  Future<void> close() => events.close();
+
+  @override
+  Stream<VehicleDataUpdate> observe() => events.stream;
+}
diff --git a/ground-suite/test/widget_test.dart b/ground-suite/test/widget_test.dart
new file mode 100644
index 0000000..bdc967a
--- /dev/null
+++ b/ground-suite/test/widget_test.dart
@@ -0,0 +1,45 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:ground_suite/app/app.dart';
+
+void main() {
+  testWidgets('replay workspace keeps diagnostics distinct and read-only', (
+    tester,
+  ) async {
+    await tester.pumpWidget(const ProviderScope(child: GroundSuiteApp()));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Observation only'), findsOneWidget);
+    expect(find.text('Replay fixture'), findsAtLeastNWidgets(1));
+    expect(find.text('Vehicle identity'), findsOneWidget);
+
+    await tester.tap(find.byIcon(Icons.receipt_long_outlined));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Diagnostics'), findsAtLeastNWidgets(1));
+    expect(
+      find.text('kaptan_drivers::lidar_lite_v3::error::Error::TransferFault'),
+      findsOneWidget,
+    );
+
+    await tester.tap(find.text('Shutdowns'));
+    await tester.pumpAndSettle();
+
+    expect(find.text('Orderly shutdown observed'), findsOneWidget);
+  });
+
+  testWidgets(
+    'compact desktop layout uses bottom navigation without overflow',
+    (tester) async {
+      await tester.binding.setSurfaceSize(const Size(480, 800));
+      addTearDown(() => tester.binding.setSurfaceSize(null));
+
+      await tester.pumpWidget(const ProviderScope(child: GroundSuiteApp()));
+      await tester.pumpAndSettle();
+
+      expect(find.byType(NavigationBar), findsOneWidget);
+      expect(tester.takeException(), isNull);
+    },
+  );
+}