big overhaul for server and webui feature matching, things default to disabled and disappear from UI when disabled.

server/src/services/barcodeGameService/index.js

@@ -6,6 +6,7 @@
 const io = require('../../globals/io');
 const logger = require('../../globals/logger').child('barcodeGameService');
 const { loadConfig } = require('../../helpers/configLoader');
+const { isFeatureEnabled } = require('../../helpers/features');
 const { subscribe } = require('../eventBus');
 const { sendSystemMessage } = require('../chatService');
 const { getActiveDrivers } = require('../turnService');
@@ -30,6 +31,7 @@ const GAME_DEFINITIONS = [scanQuest, scansPerSecond, mostItems];
 const GAMES_BY_ID = Object.fromEntries(GAME_DEFINITIONS.map((game) => [game.id, game]));
 const config = loadConfig();
 const barcodeGamesConfig = config.barcodeGames || {};
+const enabled = isFeatureEnabled('barcodeGames');
 const botName = String(barcodeGamesConfig.botName || barcodeGamesConfig.name || 'Barcode Games').trim() || 'Barcode Games';
 const botProfileImageUrl = String(barcodeGamesConfig.profileImageUrl || '').trim() || null;
 
@@ -1120,34 +1122,43 @@ function broadcastState() {
   });
 }
 
-io.on('connection', (socket) => {
-  socket.on('barcodeGame:subscribe', (_payload = {}, cb = () => {}) => {
-    socket.join(GAME_SOCKET_ROOM);
-    const state = buildStatePayload(socket);
-    socket.emit('barcodeGame:state', state);
-    cb({ success: true, state });
+if (enabled) {
+  /*
+    Barcode games are an optional layer on top of the physical scanner station.
+    Keep sockets and scan subscriptions behind the feature gate so disabled
+    installs do not run invisible game state.
+  */
+  io.on('connection', (socket) => {
+    socket.on('barcodeGame:subscribe', (_payload = {}, cb = () => {}) => {
+      socket.join(GAME_SOCKET_ROOM);
+      const state = buildStatePayload(socket);
+      socket.emit('barcodeGame:state', state);
+      cb({ success: true, state });
+    });
+
+    socket.on('barcodeGame:vote', ({ gameId } = {}, cb = () => {}) => {
+      try {
+        cb(setVote(socket, gameId));
+      } catch (err) {
+        logger.warn('Barcode game vote failed', { error: err.message, gameId });
+        cb({ error: err.message || 'barcode game vote failed' });
+      }
+    });
+
   });
 
-  socket.on('barcodeGame:vote', ({ gameId } = {}, cb = () => {}) => {
+  subscribe('barcode.scanned', (event) => {
     try {
-      cb(setVote(socket, gameId));
+      handleScan(event.payload);
     } catch (err) {
-      logger.warn('Barcode game vote failed', { error: err.message, gameId });
-      cb({ error: err.message || 'barcode game vote failed' });
+      // Scanner input should never be able to take down the server. Game failures
+      // are logged and skipped so the scanner page can keep resolving barcodes.
+      logger.warn('Barcode game scan handling failed', { error: err.message });
     }
   });
-
-});
-
-subscribe('barcode.scanned', (event) => {
-  try {
-    handleScan(event.payload);
-  } catch (err) {
-    // Scanner input should never be able to take down the server. Game failures
-    // are logged and skipped so the scanner page can keep resolving barcodes.
-    logger.warn('Barcode game scan handling failed', { error: err.message });
-  }
-});
+} else {
+  logger.info('Barcode games disabled by config');
+}
 
 module.exports = {
   buildStatePayload,
@@ -1155,8 +1166,10 @@ module.exports = {
   setVote,
 };
 
-setInterval(() => {
-  if (settleActiveGameIfNeeded()) {
-    broadcastState();
-  }
-}, GAME_TICK_MS).unref?.();
+if (enabled) {
+  setInterval(() => {
+    if (settleActiveGameIfNeeded()) {
+      broadcastState();
+    }
+  }, GAME_TICK_MS).unref?.();
+}

server/src/services/barcodeScannerService/index.js

@@ -5,6 +5,7 @@ const fs = require('fs');
 const io = require('../../globals/io');
 const logger = require('../../globals/logger').child('barcodeScannerService');
 const { resolveDataDir, resolveDataPath } = require('../../helpers/dataPaths');
+const { isFeatureEnabled } = require('../../helpers/features');
 const { getMode, MODES, modeEvents } = require('../modeManager');
 const { publishEvent } = require('../eventBus');
 const { ensureAudioForText, warmAudioForTexts } = require('./ttsCache');
@@ -14,6 +15,7 @@ const REGISTRY_PATH = resolveDataPath('barcode-registry.json');
 const RECENT_SCAN_LIMIT = 8;
 const VALID_CODE_PATTERN = /^[a-z][0-9]{3}$/;
 const SCANNER_SOCKET_ROOM = 'barcode-scanner';
+const enabled = isFeatureEnabled('barcodeScanner');
 
 let lastKnownGoodRegistry = null;
 let lastRegistryError = null;
@@ -310,39 +312,53 @@ async function applyScan(rawCode) {
   return { result };
 }
 
-io.on('connection', (socket) => {
-  socket.on('barcode:subscribe', (_payload = {}, cb = () => {}) => {
-    socket.join(SCANNER_SOCKET_ROOM);
-    socket.emit('barcode:state', buildStatePayload());
-    cb({ success: true, state: buildStatePayload() });
+if (enabled) {
+  /*
+    Barcode scanning is tied to a physical scanner station. Disabled installs
+    should not create the registry file or expose scanner socket commands.
+  */
+  io.on('connection', (socket) => {
+    socket.on('barcode:subscribe', (_payload = {}, cb = () => {}) => {
+      socket.join(SCANNER_SOCKET_ROOM);
+      socket.emit('barcode:state', buildStatePayload());
+      cb({ success: true, state: buildStatePayload() });
+    });
+
+    socket.on('barcode:scan', async ({ code } = {}, cb = () => {}) => {
+      try {
+        const { result } = await applyScan(code);
+        cb({ success: true, result, state: buildStatePayload() });
+      } catch (err) {
+        // Socket handlers should never let a malformed scan or registry edge case
+        // bubble out to the process. The page gets a normal failed acknowledgement
+        // and the service keeps running for the next scan.
+        logger.warn('Barcode scan failed unexpectedly', err);
+        cb({ error: err.message || 'barcode scan failed' });
+      }
+    });
   });
 
-  socket.on('barcode:scan', async ({ code } = {}, cb = () => {}) => {
-    try {
-      const { result } = await applyScan(code);
-      cb({ success: true, result, state: buildStatePayload() });
-    } catch (err) {
-      // Socket handlers should never let a malformed scan or registry edge case
-      // bubble out to the process. The page gets a normal failed acknowledgement
-      // and the service keeps running for the next scan.
-      logger.warn('Barcode scan failed unexpectedly', err);
-      cb({ error: err.message || 'barcode scan failed' });
-    }
+  modeEvents.on('change', () => {
+    // Access-mode changes affect whether the scanner page should beep when it
+    // submits a code, so scanner clients need a fresh state packet even without a
+    // new scan.
+    broadcastState();
   });
-});
 
-modeEvents.on('change', () => {
-  // Access-mode changes affect whether the scanner page should beep when it
-  // submits a code, so scanner clients need a fresh state packet even without a
-  // new scan.
-  broadcastState();
-});
-
-loadRegistryForScan();
+  loadRegistryForScan();
+} else {
+  logger.info('Barcode scanner disabled by config');
+}
 
 module.exports = {
   REGISTRY_PATH,
-  applyScan,
+  applyScan: (...args) => {
+    if (!enabled) throw new Error('Barcode scanner is disabled');
+    return applyScan(...args);
+  },
   buildStatePayload,
-  getRegistrySnapshot,
+  getRegistrySnapshot: () => {
+    if (!enabled) return { registry: null, error: 'barcode scanner disabled' };
+    return getRegistrySnapshot();
+  },
 };

server/src/services/buttonBoxService/index.js

@@ -4,6 +4,7 @@
 const { app } = require('../../globals/http');
 const io = require('../../globals/io');
 const logger = require('../../globals/logger').child('buttonBoxService');
+const { isFeatureEnabled } = require('../../helpers/features');
 const { resolveDataDir, resolveDataPath } = require('../../helpers/dataPaths');
 const { publishEvent } = require('../eventBus');
 const { getRewardById, listRewards } = require('../../rewards');
@@ -28,6 +29,7 @@ const DATA_DIR = resolveDataDir();
 const STORE_PATH = resolveDataPath('buttonbox-state.json');
 const BUTTON_COUNT = 4;
 const STORE_VERSION = 1;
+const enabled = isFeatureEnabled('buttonBox');
 
 const store = createButtonBoxStore({
   logger,
@@ -62,21 +64,39 @@ const core = createButtonBoxCore({
   store,
 });
 
-registerButtonBoxRoute({
-  app,
-  logger,
-  buttonCount: BUTTON_COUNT,
-  normalizeIp,
-  isLocalNetwork,
-  applyPress: core.applyPress,
-});
+if (enabled) {
+  /*
+    The button box is physical local hardware, so disabled public installs
+    should not expose its LAN-only press endpoint or initialize its reward file.
+  */
+  registerButtonBoxRoute({
+    app,
+    logger,
+    buttonCount: BUTTON_COUNT,
+    normalizeIp,
+    isLocalNetwork,
+    applyPress: core.applyPress,
+  });
 
-store.loadState();
-core.recoverEffects().catch((err) => {
-  logger.warn('Button box effect recovery failed', err.message);
-});
+  store.loadState();
+  core.recoverEffects().catch((err) => {
+    logger.warn('Button box effect recovery failed', err.message);
+  });
+} else {
+  logger.info('Button box disabled by config');
+}
 
 module.exports = {
-  getButtonBoxState: store.getStateClone,
-  addButtonBoxCount: core.addCount,
+  getButtonBoxState: () => {
+    /*
+      Session sync still includes a buttonBox key for a stable payload shape,
+      but disabled mode must not create/read the persisted button-box store.
+    */
+    if (!enabled) return { buttons: [] };
+    return store.getStateClone();
+  },
+  addButtonBoxCount: (...args) => {
+    if (!enabled) throw new Error('Button box is disabled');
+    return core.addCount(...args);
+  },
 };

server/src/services/homeAssistantService/index.js

@@ -3,6 +3,7 @@
 // Scope: Exposes stable room-control APIs while delegating internals to focused modules.
 const logger = require('../../globals/logger').child('homeAssistantService');
 const { loadConfig } = require('../../helpers/configLoader');
+const { isFeatureEnabled } = require('../../helpers/features');
 const { events } = require('./state');
 const { createRuntimeEngine } = require('./runtimeEngine');
 const { createTransport } = require('./transport');
@@ -10,7 +11,7 @@ const { registerHomeAssistantHooks } = require('./hooks');
 
 const config = loadConfig();
 const haConfig = config.homeAssistant || {};
-const enabled = Boolean(haConfig?.url && haConfig?.token);
+const enabled = isFeatureEnabled('homeAssistant');
 
 let callHomeAssistantServiceImpl = async () => {
   throw new Error('Home Assistant not connected');
@@ -35,18 +36,33 @@ callHomeAssistantServiceImpl = transport.callHomeAssistantService;
 
 runtimeEngine.loadEntityConfig();
 runtimeEngine.loadTriggerConfig();
-transport.connect();
 
-registerHomeAssistantHooks({
-  logger,
-  haConfig,
-  isLightControlLocked: runtimeEngine.isLightControlLocked,
-  setLightsLockedOn: runtimeEngine.setLightsLockedOn,
-  toggleEntity: runtimeEngine.toggleEntity,
-  setEntityState: runtimeEngine.setEntityState,
-  setLightColor: runtimeEngine.setLightColor,
-  setLightWhite: runtimeEngine.setLightWhite,
-});
+if (enabled) {
+  /*
+    Loading the module should be harmless on rover-only installs. Only connect
+    to Home Assistant when the central feature gate says the integration exists,
+    so placeholder URLs/tokens in example config cannot start network traffic.
+  */
+  transport.connect();
+}
+
+if (enabled) {
+  /*
+    Socket routes are part of the visible Home Assistant feature. Register them
+    only when enabled so disabled installs do not expose hidden controls that
+    the UI has intentionally removed.
+  */
+  registerHomeAssistantHooks({
+    logger,
+    haConfig,
+    isLightControlLocked: runtimeEngine.isLightControlLocked,
+    setLightsLockedOn: runtimeEngine.setLightsLockedOn,
+    toggleEntity: runtimeEngine.toggleEntity,
+    setEntityState: runtimeEngine.setEntityState,
+    setLightColor: runtimeEngine.setLightColor,
+    setLightWhite: runtimeEngine.setLightWhite,
+  });
+}
 
 module.exports = {
   getState: runtimeEngine.getState,

server/src/services/liftService/index.js

@@ -5,6 +5,7 @@ const EventEmitter = require('events');
 const io = require('../../globals/io');
 const logger = require('../../globals/logger').child('liftService');
 const { loadConfig } = require('../../helpers/configLoader');
+const { isFeatureEnabled } = require('../../helpers/features');
 const { getMode, MODES } = require('../modeManager');
 const { isLockdownAdmin } = require('../roleService');
 const {
@@ -19,6 +20,7 @@ const events = new EventEmitter();
 const config = loadConfig();
 const haConfig = config.homeAssistant || {};
 const liftConfig = haConfig.lift || {};
+const featureEnabled = isFeatureEnabled('lift');
 
 const upSwitchId = String(liftConfig.upSwitch || '').trim();
 const downSwitchId = String(liftConfig.downSwitch || '').trim();
@@ -71,7 +73,7 @@ function getState() {
   const configured = isConfigured();
   const connected = isHomeAssistantConnected();
   return {
-    enabled: Boolean(homeAssistantEnabled && configured),
+    enabled: Boolean(featureEnabled && homeAssistantEnabled && configured),
     configured,
     connected,
     entities: {
@@ -102,6 +104,7 @@ function emitUpdate() {
 }
 
 function assertReady() {
+  if (!featureEnabled) throw new Error('Lift is disabled');
   if (!isConfigured()) throw new Error('Lift not configured');
   if (!homeAssistantEnabled) throw new Error('Home Assistant not configured');
   if (!isHomeAssistantConnected()) throw new Error('Home Assistant not connected');
@@ -173,38 +176,47 @@ async function moveDown(actor = 'unknown') {
   return requestPosition('down', actor);
 }
 
-homeAssistantEvents.on('snapshot', emitUpdate);
-homeAssistantEvents.on('status', emitUpdate);
+if (featureEnabled) {
+  /*
+    Lift state depends on Home Assistant switch snapshots. Subscribe only when
+    the lift exists so disabled installs do not maintain hardware-specific UI
+    sync paths.
+  */
+  homeAssistantEvents.on('snapshot', emitUpdate);
+  homeAssistantEvents.on('status', emitUpdate);
 
-io.on('connection', (socket) => {
-  socket.on('lift:up', async (_, cb = () => {}) => {
-    try {
-      if (getMode() === MODES.LOCKDOWN && !isLockdownAdmin(socket)) {
-        throw new Error('Server in lockdown');
+  io.on('connection', (socket) => {
+    socket.on('lift:up', async (_, cb = () => {}) => {
+      try {
+        if (getMode() === MODES.LOCKDOWN && !isLockdownAdmin(socket)) {
+          throw new Error('Server in lockdown');
+        }
+        // Lift movement is now a public activity feature. Lockdown still wins
+        // above because that mode is the global safety/admin gate for the room.
+        const resp = await moveUp(socket.id || 'socket');
+        cb({ success: true, ...resp });
+      } catch (err) {
+        cb({ error: err.message });
       }
-      // Lift movement is now a public activity feature. Lockdown still wins
-      // above because that mode is the global safety/admin gate for the room.
-      const resp = await moveUp(socket.id || 'socket');
-      cb({ success: true, ...resp });
-    } catch (err) {
-      cb({ error: err.message });
-    }
-  });
+    });
 
-  socket.on('lift:down', async (_, cb = () => {}) => {
-    try {
-      if (getMode() === MODES.LOCKDOWN && !isLockdownAdmin(socket)) {
-        throw new Error('Server in lockdown');
+    socket.on('lift:down', async (_, cb = () => {}) => {
+      try {
+        if (getMode() === MODES.LOCKDOWN && !isLockdownAdmin(socket)) {
+          throw new Error('Server in lockdown');
+        }
+        // Public access intentionally mirrors lift:up so both directions share
+        // the same policy and cannot drift into different permission behavior.
+        const resp = await moveDown(socket.id || 'socket');
+        cb({ success: true, ...resp });
+      } catch (err) {
+        cb({ error: err.message });
       }
-      // Public access intentionally mirrors lift:up so both directions share
-      // the same policy and cannot drift into different permission behavior.
-      const resp = await moveDown(socket.id || 'socket');
-      cb({ success: true, ...resp });
-    } catch (err) {
-      cb({ error: err.message });
-    }
+    });
   });
-});
+} else {
+  logger.info('Lift disabled by config');
+}
 
 emitUpdate();
 

server/src/services/neatoService/index.js

@@ -5,6 +5,7 @@ const EventEmitter = require('events');
 const io = require('../../globals/io');
 const logger = require('../../globals/logger').child('neatoService');
 const { loadConfig } = require('../../helpers/configLoader');
+const { isFeatureEnabled } = require('../../helpers/features');
 const { isVerified } = require('../verificationService');
 const { getMode, MODES } = require('../modeManager');
 const { isLockdownAdmin } = require('../roleService');
@@ -20,6 +21,7 @@ const events = new EventEmitter();
 const config = loadConfig();
 const haConfig = config.homeAssistant || {};
 const neatoConfig = haConfig.neato || {};
+const featureEnabled = isFeatureEnabled('neato');
 
 function normalizeDeviceName(value) {
   const raw = String(value || '').trim().toLowerCase();
@@ -117,7 +119,7 @@ function buildState() {
   const requiredIds = requiredEntityIds();
   const entitiesAvailable = requiredIds.length > 0 && requiredIds.every((id) => isEntityAvailable(id));
   const connected = Boolean(haConnected && entitiesAvailable);
-  const enabled = Boolean(homeAssistantEnabled && configured);
+  const enabled = Boolean(featureEnabled && homeAssistantEnabled && configured);
 
   const controls = {
     start: {
@@ -189,15 +191,25 @@ function emitUpdate() {
   }
 }
 
-homeAssistantEvents.on('snapshot', () => {
-  emitUpdate();
-});
+if (featureEnabled) {
+  /*
+    Neato telemetry is derived from Home Assistant entities. Disabled installs
+    should keep the exported API inert instead of tracking HA snapshots for a
+    robot vacuum feature that does not exist on that server.
+  */
+  homeAssistantEvents.on('snapshot', () => {
+    emitUpdate();
+  });
 
-homeAssistantEvents.on('status', () => {
-  emitUpdate();
-});
+  homeAssistantEvents.on('status', () => {
+    emitUpdate();
+  });
+}
 
 function assertConfiguredAndConnected() {
+  if (!featureEnabled) {
+    throw new Error('Neato is disabled');
+  }
   if (!device) {
     throw new Error('Neato not configured');
   }
@@ -255,7 +267,8 @@ function hasVerifiedSockets() {
   return false;
 }
 
-io.on('connection', (socket) => {
+if (featureEnabled) {
+  io.on('connection', (socket) => {
   function assertLockdownAccess() {
     if (getMode() === MODES.LOCKDOWN && !isLockdownAdmin(socket)) {
       throw new Error('Server in lockdown');
@@ -319,7 +332,10 @@ io.on('connection', (socket) => {
       cb({ error: err.message });
     }
   });
-});
+  });
+} else {
+  logger.info('Neato disabled by config');
+}
 
 emitUpdate();
 

server/src/services/roomCameraService/catalog.js

@@ -4,6 +4,7 @@
 const EventEmitter = require('events');
 const logger = require('../../globals/logger').child('roomCameraService');
 const { loadConfig } = require('../../helpers/configLoader');
+const { getRoomCameraEntries } = require('../../helpers/features');
 
 const events = new EventEmitter();
 const config = loadConfig();
@@ -40,7 +41,7 @@ function getRoomCamera(id) {
 
 function loadFromConfig() {
   cameraMap.clear();
-  const list = Array.isArray(config.roomCameras) ? config.roomCameras : [];
+  const list = getRoomCameraEntries(config);
   list.forEach((camera) => {
     const normalized = normalizeCamera(camera);
     if (normalized) cameraMap.set(normalized.id, normalized);

server/src/services/roomCameraService/index.js

@@ -5,18 +5,34 @@ const { loadFromConfig, getRoomCameras, getRoomCamera, roomCameraEvents } = requ
 const { createSnapshotEngine } = require('./snapshotEngine');
 const { registerRoomCameraSocketGateway } = require('./socketGateway');
 const replay = require('../replayEngineV2/roomCameraReplayBuilder');
+const { isFeatureEnabled } = require('../../helpers/features');
+
+const enabled = isFeatureEnabled('roomCameras');
 
 const snapshotEngine = createSnapshotEngine({ getRoomCameras, roomCameraEvents });
-snapshotEngine.startAll();
+if (enabled) {
+  /*
+    Room cameras are optional local hardware/network devices. The service module
+    can still be imported by replay, health, and session code, but disabled
+    installs must not start polling LAN cameras in the background.
+  */
+  loadFromConfig();
+  snapshotEngine.startAll();
+}
 
-registerRoomCameraSocketGateway({
-  getRoomCamera,
-  getRoomCameras,
-  getRoomCameraState: snapshotEngine.getRoomCameraState,
-  roomCameraStreamEvents: snapshotEngine.roomCameraStreamEvents,
-});
-
-loadFromConfig();
+if (enabled) {
+  /*
+    Camera frame sockets are part of the room-camera feature surface. Keeping
+    them behind the same gate prevents disabled features from being callable by
+    hand even though server/index.js still imports this module.
+  */
+  registerRoomCameraSocketGateway({
+    getRoomCamera,
+    getRoomCameras,
+    getRoomCameraState: snapshotEngine.getRoomCameraState,
+    roomCameraStreamEvents: snapshotEngine.roomCameraStreamEvents,
+  });
+}
 
 function buildRoomCameraReplayVideo(options = {}) {
   return replay.buildRoomCameraReplayVideo(options, { getRoomCamera, getRoomCameras });

server/src/services/sessionService/constants.js

@@ -2,12 +2,13 @@
 // Purpose: Defines timing and static social/config constants used by session synchronization behavior.
 // Scope: Keeps runtime behavior unchanged while isolating constants from orchestration logic.
 const { loadConfig } = require('../../helpers/configLoader');
+const { getConfiguredSocials } = require('../../helpers/features');
 
 const config = loadConfig();
 const discordInvite = config.discord?.invite || null;
 const kofiLink = config.kofi?.link || null;
 const serverTimezone = config.timezone || null;
-const configuredSocials = Array.isArray(config.socials) ? config.socials : null;
+const configuredSocials = getConfiguredSocials(config);
 
 const ACTIVITY_SYNC_COOLDOWN_MS = 3000;
 const GPIO_TOGGLE_SYNC_COOLDOWN_MS = 1000;

server/src/services/sessionService/index.js

@@ -32,6 +32,7 @@ const { getGlobalObjective } = require('../globalObjectiveService');
 const { getAdminReason } = require('../adminReasonService');
 const { subscribe } = require('../eventBus');
 const { getSocketIp, isLocalNetwork } = require('../../helpers/ipResolver');
+const { getFeatureFlags } = require('../../helpers/features');
 const { getAudioForwardState, audioForwardEvents } = require('../audioForwardService');
 const { getAudioLevels, audioLevelsEvents } = require('../audioLevelsService');
 const { getButtonBoxState } = require('../buttonBoxService');
@@ -70,6 +71,7 @@ function buildUserEntry(socket) {
 
 function buildSession(socket) {
   const overseerVote = getOverseerVoteStatus();
+  const features = getFeatureFlags();
   const users = Array.from(io.sockets.sockets.values())
     .map((sock) => buildUserEntry(sock))
     .filter(Boolean)
@@ -82,18 +84,18 @@ function buildSession(socket) {
   const assignmentRoverId = filterVisibleRoverId(socket, assignment?.roverId);
   const activeDrivers = filterActiveDriversForSocket(getActiveDrivers(), socket);
   const turnQueues = filterTurnQueuesForSocket(getTurnQueues(), socket);
-  const socials =
-    configuredSocials?.length
-      ? configuredSocials
-      : [
-          ...(discordInvite ? [{ id: 'discord', label: 'Discord', url: discordInvite }] : []),
-          ...(kofiLink ? [{ id: 'kofi', label: 'Ko-fi', url: kofiLink }] : []),
-        ];
+  const socials = features.socials && configuredSocials?.length ? configuredSocials : [];
   return {
     socketId: socket?.id || null,
     role: getRole(socket),
     mode: getMode(),
     isLocalNetwork: isLocalNetwork(getSocketIp(socket)),
+    /*
+      Features is the single UI contract for optional server capabilities. A
+      disabled feature should be absent from navigation/layout decisions even
+      though the service module may still be loaded on the Node side.
+    */
+    features,
     roster,
     odometers: roverManager.getOdometersForSocket(socket),
     assignment: {