refactor(voice): W1 actions on the engine

The voice runner drives the globe engine (an `engine` option, by default
the one registered for the viewer) instead of the Cesium viewer:
track_entity, stop_tracking (camera.following().stop()), frame_overhead
(camera.flyToSphere with the pose heading), fly_to_location, zoom_to_globe
(follow released through camera.following()), adjust_camera_zoom,
next_iss_pass / next_satellite_pass, select_nearest_aircraft and the
analyst view context, get_current_view_state, get_entity_context
(projector.worldToWindow), the view target (picker.pickPosition, then
camera.pickEllipsoid, then picker.pickGlobe) and its moveEnd prewarm, and
the viewport samples. getBasemapLabelContext takes the engine or a viewer
with a registered engine (the HUD).

Without a viewer the tools that still need one (VIEWER_ONLY_ACTIONS:
control_scene, annotate_map, clear_annotations, fly_route, move_camera,
control_cockpit, set_context_mode, control_radio, control_cctv) answer a
structured refusal (code UNAVAILABLE_ON_ENGINE) instead of throwing.

Point-and-ask picks with engine.picker and keys the camera pose from
engine.camera.pose(); the viewport capture reads engine.host.canvas and
waits for the engine's postRender (both engines keep their drawing
buffer: Cesium's contextOptions, Navara's own WebGL2 canvas, S4).

Tests: gevActionsEngine.test.mjs runs each moved action on the fake
engine. gevActions.test.mjs keeps its expectations; its runner helper now
registers an engine for the test viewer (the Cesium engine over it, or a
fake engine at its positionCartographic) and the two harness cameras gain
roll and frustum for camera.pose().

scripts/format-scope.json

@@ -1010,6 +1010,7 @@
   "scripts/qa/navaraContractPage.js",
   "scripts/qa/tileCache.mjs",
   "src/annotations/resolverEngine.test.mjs",
+  "src/voice/gevActionsEngine.test.mjs",
   "src/app/controls.test.mjs",
   "src/app/engineChoice.js",
   "src/app/engineChoice.test.mjs",

scripts/package-boundaries.json

@@ -1705,7 +1705,8 @@
       "src/voice/narration.js",
       "src/voice/earcon.js",
       "src/voice/pointerContext.js",
-      "src/voice/pointerReticle.js"
+      "src/voice/pointerReticle.js",
+      "src/globe/contract.js"
     ],
     "external": []
   },

src/voice/gevActions.js

@@ -43,6 +43,7 @@ import {
 } from '../cameraVerbs.js';
 import * as defaultFloorServices from '../data/groundFloor.js';
 import { isPickedWorldPosition } from '../data/scenePick.js';
+import { engineFromViewer } from '../globe/cesium/engineFromViewer.js';
 import { unavailablePlaceSearch } from '../search/placeSearch.js';
 import * as defaultAnnotationResolver from '../annotations/annotationResolver.js';
 import { normalizeRadioCountryInput } from '../data/radioCountry.js';
@@ -264,6 +265,38 @@ const FRAME_TARGETS = new Map([
   ['ships', 'ais-live-vessels'],
 ]);
 
+/**
+ * The tools that still need the Cesium viewer or a subsystem built on it:
+ * the scene director, annotations and routes over them, the camera verbs
+ * (orbit, pan, tilt), the cockpit, Contacts (the context mode), Radio and
+ * CCTV. Without a viewer (the Navara engine) each answers a structured
+ * refusal (UNAVAILABLE_ON_ENGINE) instead of running.
+ */
+export const VIEWER_ONLY_ACTIONS = Object.freeze([
+  'control_scene',
+  'annotate_map',
+  'clear_annotations',
+  'fly_route',
+  'move_camera',
+  'control_cockpit',
+  'set_context_mode',
+  'control_radio',
+  'control_cctv',
+]);
+/** The refusal code of a viewer-only tool on an engine without a viewer. */
+export const UNAVAILABLE_ON_ENGINE = 'UNAVAILABLE_ON_ENGINE';
+
+function unavailableOnEngine(name, engine) {
+  return {
+    ok: false,
+    action: name,
+    unavailable: true,
+    code: UNAVAILABLE_ON_ENGINE,
+    engine: engine?.kind ?? null,
+    error: 'Unavailable on this engine',
+  };
+}
+
 const serviceCaches = new WeakMap();
 function cachesFor(service) {
   service.signal?.throwIfAborted();
@@ -289,10 +322,21 @@ function cachesFor(service) {
 const VISIBLE_ENTITY_SHORTLIST = 64;
 const BASEMAP_CONTEXT_WAIT_MS = 1500;
 const viewTargetCache = new WeakMap();
+const prewarmedEngines = new WeakSet();
 
-/** Create application actions over the supplied scene and services. */
+/** The camera's place (radians, metres) from its live position. */
+const cameraCartographic = (engine) =>
+  geo.cartographic.fromCartesian(engine.camera.livePosition);
+
+/**
+ * Create application actions over the supplied scene and services. The
+ * actions drive the globe `engine` (by default the one registered for the
+ * viewer); `viewer` is null on an engine without one (Navara), where the
+ * VIEWER_ONLY_ACTIONS refuse.
+ */
 export function createGevActionRunner({
   viewer,
+  engine: givenEngine = null,
   styleManager,
   dataManager,
   sceneDirector = null,
@@ -310,20 +354,22 @@ export function createGevActionRunner({
   const builders = speechBuilders
     ? { ...SPEECH_BUILDERS, ...speechBuilders }
     : SPEECH_BUILDERS;
+  const engine = givenEngine ?? engineFromViewer(viewer);
   const _layerEnabledAt = new Map();
   let analystEngine;
   const resolveRegionRing = (name, signal) =>
     annotationResolver.resolveRegionRingForQuery(name, signal, placeSearch);
   const ensureAnalystEngine = () =>
     (analystEngine ||= createAnalystEngine(
-      analystProviders(viewer, dataManager, {
+      analystProviders(engine, dataManager, {
         placeSearch,
         resolveRegionRing,
         isWarming: (layerKey) => layerIsWarming(_layerEnabledAt, layerKey),
       }),
     ));
-  installViewTargetPrewarm(viewer);
-  initCameraVerbs(viewer, getViewTargetCartesian);
+  installViewTargetPrewarm(engine);
+  // The camera verbs (move_camera, fly_route) still run on the viewer.
+  if (viewer) initCameraVerbs(viewer, () => getViewTargetCartesian(engine));
   // Nested calls (select_nearest_aircraft composing layer + flight) use the
   // raw runner; only the outer call gets a voice envelope.
   const runGevAction = async function runGevAction(
@@ -343,6 +389,8 @@ export function createGevActionRunner({
         /* Progress is advisory. */
       }
     };
+    if (!viewer && VIEWER_ONLY_ACTIONS.includes(name))
+      return unavailableOnEngine(name, engine);
 
     // Navigation tools interrupt any continuous camera motion (spec §1.1) —
     // checked FIRST because each handler returns.
@@ -352,8 +400,8 @@ export function createGevActionRunner({
     // Explicit navigation while TRACKING supersedes the follow camera —
     // otherwise the tracker drags the view back and "I flew there but can't
     // do anything" (field finding). track_entity manages its own handoff.
-    if (name === 'zoom_to_globe' && viewer.trackedEntity) {
-      stopAllTracking(viewer, dataManager);
+    if (name === 'zoom_to_globe' && engine?.camera.following()) {
+      stopAllTracking(engine, dataManager);
     }
 
     // Zoom during an active orbit adjusts the orbit RADIUS (spiral in/out) —
@@ -587,7 +635,7 @@ export function createGevActionRunner({
           });
         } else if (typeof layerModule?.update === 'function') {
           refreshed =
-            (await layerModule.update(viewer, {
+            (await layerModule.update(viewer ?? engine, {
               signal: runOptions.signal,
             })) !== false;
         }
@@ -620,7 +668,7 @@ export function createGevActionRunner({
 
       reportProgress('nearest', location.label);
       const nearest = await createAnalystEngine(
-        analystProviders(viewer, dataManager, {
+        analystProviders(engine, dataManager, {
           recordLimitByLayer: { [layerId]: Number.MAX_SAFE_INTEGER },
           placeSearch,
           resolveRegionRing,
@@ -653,7 +701,7 @@ export function createGevActionRunner({
       }
 
       const stableAircraftId = aircraft.icao24 || aircraft.id;
-      const selection = await trackEntity(viewer, dataManager, styleManager, {
+      const selection = await trackEntity(engine, dataManager, styleManager, {
         query: stableAircraftId,
         layerId,
       });
@@ -950,7 +998,7 @@ export function createGevActionRunner({
           runOptions,
         );
       }
-      return flyToRequestedLocation(viewer, args, {
+      return flyToRequestedLocation(engine, args, {
         onProgress: reportProgress,
         placeSearch,
         searchNavigation,
@@ -975,20 +1023,20 @@ export function createGevActionRunner({
             return;
           }
           interruptCameraMotion('nav:fly_to_location');
-          if (viewer.trackedEntity) stopAllTracking(viewer, dataManager);
+          if (engine?.camera.following()) stopAllTracking(engine, dataManager);
         },
       });
     }
 
     if (name === 'adjust_camera_zoom') {
-      return adjustCameraZoom(viewer, args);
+      return adjustCameraZoom(engine, args);
     }
 
     if (name === 'zoom_to_globe') {
       if (typeof styleManager?.resetToGlobeView === 'function') {
         return styleManager.resetToGlobeView();
       }
-      const result = flyToGlobeView(viewer);
+      const result = flyToGlobeView(engine);
       return {
         ok: true,
         action: 'zoom_to_globe',
@@ -1001,11 +1049,11 @@ export function createGevActionRunner({
     }
 
     if (name === 'next_satellite_pass') {
-      return nextSatellitePass(viewer, dataManager, args);
+      return nextSatellitePass(engine, dataManager, args);
     }
 
     if (name === 'next_iss_pass') {
-      return nextIssPass(viewer, dataManager, args);
+      return nextIssPass(engine, dataManager, args);
     }
 
     if (name === 'analyst_query') {
@@ -1049,7 +1097,7 @@ export function createGevActionRunner({
 
     if (name === 'get_entity_context') {
       return getEntityContext(
-        viewer,
+        engine,
         dataManager,
         styleManager,
         args,
@@ -1059,7 +1107,7 @@ export function createGevActionRunner({
 
     if (name === 'get_current_view_state') {
       return getCurrentViewState(
-        viewer,
+        engine,
         styleManager,
         dataManager,
         sceneDirector,
@@ -1164,17 +1212,17 @@ export function createGevActionRunner({
     }
 
     if (name === 'track_entity') {
-      return trackEntity(viewer, dataManager, styleManager, args, {
+      return trackEntity(engine, dataManager, styleManager, args, {
         isCurrent: current,
       });
     }
 
     if (name === 'stop_tracking') {
-      return stopAllTracking(viewer, dataManager);
+      return stopAllTracking(engine, dataManager);
     }
 
     if (name === 'frame_overhead') {
-      return frameOverhead(viewer, dataManager, styleManager, args);
+      return frameOverhead(engine, dataManager, styleManager, args);
     }
 
     if (name === 'annotate_map') {
@@ -2187,7 +2235,7 @@ export function formatTrackedEntityLabel(found, query = '') {
 
 /** Finds and tracks/selects an entity by spoken query across layer families. */
 async function trackEntity(
-  viewer,
+  engine,
   dataManager,
   styleManager,
   args = {},
@@ -2240,7 +2288,7 @@ async function trackEntity(
       'fire',
       'track_entity',
       () => {
-        flyToLandmark(viewer, strongest.latitude, strongest.longitude, {
+        flyToLandmark(engine, strongest.latitude, strongest.longitude, {
           range: 14000,
           pitch: -50,
           heading: 0,
@@ -2300,7 +2348,7 @@ async function trackEntity(
         let trackedOk = false;
         if (family.kind === 'vessel') {
           trackedOk = !!module.selectById?.(found.mmsi);
-          flyToLandmark(viewer, found.latitude, found.longitude, {
+          flyToLandmark(engine, found.latitude, found.longitude, {
             range: 6000,
             pitch: -45,
             heading: 0,
@@ -2346,7 +2394,7 @@ async function trackEntity(
 }
 
 /** Releases tracking/selection on every entity layer family. */
-function stopAllTracking(viewer, dataManager) {
+function stopAllTracking(engine, dataManager) {
   const released = [];
   const failed = new Set();
   for (const family of TRACKABLE_FAMILIES) {
@@ -2397,7 +2445,7 @@ function stopAllTracking(viewer, dataManager) {
       failed.add(layerId);
     }
   }
-  if (viewer) viewer.trackedEntity = undefined;
+  engine?.camera.following()?.stop();
   if (failed.size) {
     const failedLayerIds = [...failed];
     return {
@@ -2418,7 +2466,7 @@ function stopAllTracking(viewer, dataManager) {
  * detection so the framed entities are labeled, and reports
  * detectionEnabled so the voice agent can mention labels are on.
  */
-async function frameOverhead(viewer, dataManager, styleManager, args = {}) {
+async function frameOverhead(engine, dataManager, styleManager, args = {}) {
   const targetRaw = String(args.target || 'flights').toLowerCase();
   const layerId =
     FRAME_TARGETS.get(targetRaw) || normalizeLayerId(targetRaw) || 'flights';
@@ -2445,7 +2493,9 @@ async function frameOverhead(viewer, dataManager, styleManager, args = {}) {
       ? 120
       : 150;
   const radiusKm = clampNumber(args.radiusKm, 10, 20000, defaultRadiusKm);
-  const center = getViewTargetCartesian(viewer) || viewer.camera.positionWC;
+  const center =
+    getViewTargetCartesian(engine) ||
+    geo.cartesian3.clone(engine.camera.livePosition);
 
   let entries = [];
   if (typeof module.getNearby === 'function') {
@@ -2472,23 +2522,25 @@ async function frameOverhead(viewer, dataManager, styleManager, args = {}) {
     };
   }
 
-  const sphere = Cesium.BoundingSphere.fromPoints(
+  // Cesium's bounding sphere (pure math, no viewer), flown by the engine.
+  const bounds = Cesium.BoundingSphere.fromPoints(
     entries.map((entry) => entry.position),
   );
-  sphere.radius = Math.max(sphere.radius * 1.25, 8000);
+  const sphere = {
+    center: geo.cartesian3.clone(bounds.center),
+    radius: Math.max(bounds.radius * 1.25, 8000),
+  };
   const pitch = geo.math.toRadians(isSatellites ? -35 : -62);
   return runManagedVoiceNavigation(
     styleManager,
     'frame',
     'frame_overhead',
     () => {
-      viewer.camera.flyToBoundingSphere(sphere, {
+      engine.camera.flyToSphere(sphere, {
         duration: 2.0,
-        offset: new Cesium.HeadingPitchRange(
-          viewer.camera.heading,
-          pitch,
-          sphere.radius * 2.4,
-        ),
+        heading: engine.camera.pose().heading,
+        pitch,
+        range: sphere.radius * 2.4,
       });
 
       let detectionEnabled = false;
@@ -2567,25 +2619,30 @@ function collectTrackedEntities(dataManager) {
   return tracked;
 }
 
+/**
+ * @param {object} target The globe engine, or a Cesium viewer with a
+ *   registered engine (the HUD).
+ */
 export async function getBasemapLabelContext(
-  viewer,
+  target,
   service = defaultGeospatial,
   { cachedOnly = false } = {},
 ) {
+  const engine = engineFromViewer(target);
   const { reverseGeocodeCache, nearbyPlacesCache } = cachesFor(service);
-  const samples = sampleViewportCartographics(viewer);
-  const cameraHeightM = viewer.camera.positionCartographic.height;
-  const target = getViewTargetCartographic(viewer);
-  if (!target) {
+  const viewTarget = engine ? getViewTargetCartographic(engine) : null;
+  if (!viewTarget) {
     return {
       placeLabels: [],
       streetLabels: [],
       nearbyPlaceLabels: [],
     };
   }
+  const samples = sampleViewportCartographics(engine);
+  const cameraHeightM = engine.camera.height();
 
-  const latitude = Number(geo.math.toDegrees(target.latitude).toFixed(6));
-  const longitude = Number(geo.math.toDegrees(target.longitude).toFixed(6));
+  const latitude = Number(geo.math.toDegrees(viewTarget.latitude).toFixed(6));
+  const longitude = Number(geo.math.toDegrees(viewTarget.longitude).toFixed(6));
   const cachedViewportPlaces = viewportPlacesFromCache(
     samples,
     cameraHeightM,
@@ -2646,12 +2703,12 @@ export async function getBasemapLabelContext(
   };
 }
 
-function installViewTargetPrewarm(viewer) {
-  if (viewer.__gevViewTargetPrewarmInstalled) return;
-  viewer.__gevViewTargetPrewarmInstalled = true;
+function installViewTargetPrewarm(engine) {
+  if (!engine || prewarmedEngines.has(engine)) return;
+  prewarmedEngines.add(engine);
   let timer = null;
   let reportedPrewarmFailure = false;
-  viewer.camera.moveEnd.addEventListener(() => {
+  engine.camera.moveEnd.addEventListener(() => {
     if (timer) window.clearTimeout(timer);
     timer = window.setTimeout(() => {
       timer = null;
@@ -2659,10 +2716,10 @@ function installViewTargetPrewarm(viewer) {
       // because an idle callback is an UNCAUGHT context — nothing above it can
       // handle a surprise from the scene graph, and a red console error on a
       // plain camera flight is worse than a cold cache. Reported once per
-      // viewer so a repeating cause cannot spam the console.
+      // engine so a repeating cause cannot spam the console.
       const warm = () => {
         try {
-          getViewTargetCartographic(viewer);
+          getViewTargetCartographic(engine);
         } catch (error) {
           if (reportedPrewarmFailure) return;
           reportedPrewarmFailure = true;
@@ -2681,7 +2738,7 @@ function installViewTargetPrewarm(viewer) {
   });
 }
 
-function adjustCameraZoom(viewer, args) {
+function adjustCameraZoom(engine, args) {
   const direction = String(args.direction || '').toLowerCase();
   if (direction !== 'in' && direction !== 'out') {
     throw new Error('adjust_camera_zoom direction must be "in" or "out"');
@@ -2695,10 +2752,10 @@ function adjustCameraZoom(viewer, args) {
   }[amount];
   if (!fraction) throw new Error(`Unknown zoom amount: ${args.amount}`);
 
-  const camera = viewer.camera;
-  const beforePosition = geo.cartesian3.clone(camera.positionWC);
-  const beforeHeightM = camera.positionCartographic.height;
-  const target = getViewTargetCartesian(viewer);
+  const camera = engine.camera;
+  const beforePosition = geo.cartesian3.clone(camera.livePosition);
+  const beforeHeightM = camera.height();
+  const target = getViewTargetCartesian(engine);
   const targetDistanceM = target
     ? geo.cartesian3.distance(beforePosition, target)
     : Math.max(100, beforeHeightM);
@@ -2724,11 +2781,11 @@ function adjustCameraZoom(viewer, args) {
     }
     camera.zoomIn(safeMovementM);
   }
-  viewer.scene.requestRender();
+  engine.render.request('voice-zoom');
 
-  const afterPosition = camera.positionWC;
+  const afterPosition = camera.livePosition;
   const movedM = geo.cartesian3.distance(beforePosition, afterPosition);
-  const afterHeightM = camera.positionCartographic.height;
+  const afterHeightM = camera.height();
   const moved = movedM >= 0.5;
   return {
     ok: moved,
@@ -2766,11 +2823,11 @@ function compassDir(azDeg) {
   return COMPASS_16[Math.round((((azDeg % 360) + 360) % 360) / 22.5) % 16];
 }
 
-function nextIssPass(viewer, dataManager, args) {
+function nextIssPass(engine, dataManager, args) {
   let latDeg = Number.isFinite(args.latitude) ? args.latitude : null;
   let lonDeg = Number.isFinite(args.longitude) ? args.longitude : null;
   if (latDeg == null || lonDeg == null) {
-    const carto = viewer?.camera?.positionCartographic;
+    const carto = engine ? cameraCartographic(engine) : null;
     if (!carto) throw new Error('Camera position unavailable');
     latDeg = geo.math.toDegrees(carto.latitude);
     lonDeg = geo.math.toDegrees(carto.longitude);
@@ -2816,7 +2873,7 @@ function nextIssPass(viewer, dataManager, args) {
   };
 }
 
-function nextSatellitePass(viewer, dataManager, args) {
+function nextSatellitePass(engine, dataManager, args) {
   const layer = dataManager?.layers?.get('satellites')?.module;
   const identity = layer?.resolveSatelliteForPass?.(args.target) || {
     status: 'not-found',
@@ -2849,7 +2906,7 @@ function nextSatellitePass(viewer, dataManager, args) {
       ],
     ]),
   };
-  const result = nextIssPass(viewer, adapter, args);
+  const result = nextIssPass(engine, adapter, args);
   if (result.error) {
     result.error = result.error.replace(
       /ISS/g,
@@ -3015,7 +3072,7 @@ function normalizeStyle(value) {
 }
 
 async function flyToRequestedLocation(
-  viewer,
+  engine,
   args,
   {
     placeSearch = unavailablePlaceSearch,
@@ -3067,7 +3124,7 @@ async function flyToRequestedLocation(
 
   if (locationId) {
     const result = immediate(() =>
-      flyToPresetLocation(viewer, locationId, {
+      flyToPresetLocation(engine, locationId, {
         ...(rangeM || args.viewMode === 'close'
           ? { range: rangeM || 250 }
           : { viewMode: 'overview' }),
@@ -3097,7 +3154,7 @@ async function flyToRequestedLocation(
   const longitude = Number(args.longitude);
   if (Number.isFinite(latitude) && Number.isFinite(longitude)) {
     const result = immediate(() =>
-      flyToLandmark(viewer, latitude, longitude, {
+      flyToLandmark(engine, latitude, longitude, {
         range: rangeM || 250,
         pitch: -35,
         heading: 0,
@@ -3129,7 +3186,7 @@ async function flyToRequestedLocation(
     const poiMatch = findPoiByName(query);
     if (poiMatch) {
       const result = immediate(() =>
-        flyToPOI(viewer, poiMatch.cityId, poiMatch.index, {
+        flyToPOI(engine, poiMatch.cityId, poiMatch.index, {
           duration: 2.2,
           onStart: immediateOnStart,
           ...arrivalHooks,
@@ -3154,7 +3211,7 @@ async function flyToRequestedLocation(
     if (generation === false) return cancelled(query);
     onProgress('search', query);
     const managedDeferred = typeof reassertDeferred === 'function';
-    const destination = await searchNavigation(viewer, query, {
+    const destination = await searchNavigation(engine, query, {
       placeSearch,
       signal,
       ...(rangeM ? { range: rangeM } : {}),
@@ -3195,12 +3252,12 @@ function normalizeLocationId(value) {
 }
 
 function getCurrentViewState(
-  viewer,
+  engine,
   styleManager,
   dataManager,
   sceneDirector = null,
 ) {
-  const cartographic = geo.cartographic.fromCartesian(viewer.camera.positionWC);
+  const cartographic = cameraCartographic(engine);
   return {
     ok: true,
     action: 'get_current_view_state',
@@ -3255,7 +3312,7 @@ function getCurrentViewState(
 }
 
 async function getEntityContext(
-  viewer,
+  engine,
   dataManager,
   styleManager,
   args = {},
@@ -3264,15 +3321,15 @@ async function getEntityContext(
   const startedAt = performance.now();
   const scope = String(args.scope || 'auto').toLowerCase();
   if (scope === 'target' && args.target) {
-    return getTargetContext(viewer, dataManager, styleManager, args, service);
+    return getTargetContext(engine, dataManager, styleManager, args, service);
   }
   const layerId = normalizeLayerId(args.layerId || args.layer);
   const limit = Math.round(clampNumber(args.limit, 1, 12, 5));
   const selected = selectedEntityContext(dataManager);
-  const cameraHeightM = viewer.camera.positionCartographic.height;
-  const viewTarget = getViewTargetCartographic(viewer);
+  const cameraHeightM = engine.camera.height();
+  const viewTarget = getViewTargetCartographic(engine);
   const scenePromise = getSceneContext(
-    viewer,
+    engine,
     styleManager,
     dataManager,
     viewTarget,
@@ -3282,7 +3339,7 @@ async function getEntityContext(
     selected && (scope === 'selected' || scope === 'auto');
   const visible =
     !selectedWillBeReturned && shouldScanVisibleEntities(cameraHeightM)
-      ? visibleEntityContexts(viewer, dataManager, {
+      ? visibleEntityContexts(engine, dataManager, {
           layerId,
           limit,
           target: viewTarget,
@@ -3420,7 +3477,7 @@ function describeTargetEntity(dataManager, target) {
 
 /** get_entity_context for a pointed/referenced target (scope 'target'). */
 async function getTargetContext(
-  viewer,
+  engine,
   dataManager,
   styleManager,
   args,
@@ -3440,10 +3497,10 @@ async function getTargetContext(
   const hasPosition = Number.isFinite(lat) && Number.isFinite(lon);
   const viewTarget = hasPosition
     ? geo.cartographic.fromDegrees(lon, lat)
-    : getViewTargetCartographic(viewer);
+    : getViewTargetCartographic(engine);
   const selected = describeTargetEntity(dataManager, target);
   const scene = await getSceneContext(
-    viewer,
+    engine,
     styleManager,
     dataManager,
     viewTarget,
@@ -3458,9 +3515,9 @@ async function getTargetContext(
       selected,
     };
   }
-  const cameraHeightM = viewer.camera.positionCartographic.height;
+  const cameraHeightM = engine.camera.height();
   const visible = shouldScanVisibleEntities(cameraHeightM)
-    ? visibleEntityContexts(viewer, dataManager, {
+    ? visibleEntityContexts(engine, dataManager, {
         layerId: normalizeLayerId(args.layerId || args.layer),
         limit: Math.round(clampNumber(args.limit, 1, 12, 5)),
         target: viewTarget,
@@ -3747,14 +3804,12 @@ function selectedEntityContext(dataManager) {
 }
 
 function visibleEntityContexts(
-  viewer,
+  engine,
   dataManager,
   { layerId = null, limit = 5, target = null } = {},
 ) {
   const nearbyRecords = [];
-  const canvas = viewer.scene.canvas;
-  const width = canvas.clientWidth || canvas.width || 0;
-  const height = canvas.clientHeight || canvas.height || 0;
+  const { width, height } = engine.host.size();
   const centerX = width / 2;
   const centerY = height / 2;
   const targetLat = target ? geo.math.toDegrees(target.latitude) : null;
@@ -3795,10 +3850,7 @@ function visibleEntityContexts(
   for (const { record } of nearbyRecords) {
     const position = record.entity?.__localBaseCartesian;
     if (!position) continue;
-    const screen = Cesium.SceneTransforms.worldToWindowCoordinates(
-      viewer.scene,
-      position,
-    );
+    const screen = engine.projector.worldToWindow(position);
     if (
       !screen ||
       screen.x < 0 ||
@@ -3843,14 +3895,14 @@ function insertNearestRecord(records, candidate, limit) {
 }
 
 async function getSceneContext(
-  viewer,
+  engine,
   styleManager,
   dataManager,
   viewTarget = null,
   service = defaultGeospatial,
 ) {
-  const cartographic = geo.cartographic.fromCartesian(viewer.camera.positionWC);
-  const basemap = await getBasemapContext(viewer, viewTarget, service);
+  const cartographic = cameraCartographic(engine);
+  const basemap = await getBasemapContext(engine, viewTarget, service);
   const enabledLayers = dataManager
     .getAll()
     .filter((layer) => layer.enabled)
@@ -3873,17 +3925,14 @@ async function getSceneContext(
 }
 
 async function getBasemapContext(
-  viewer,
+  engine,
   viewTarget = null,
   service = defaultGeospatial,
 ) {
   const { reverseGeocodeCache, nearbyPlacesCache } = cachesFor(service);
   const target = viewTarget;
-  const samples = sampleViewportCartographics(viewer);
-  const cameraCartographic = geo.cartographic.fromCartesian(
-    viewer.camera.positionWC,
-  );
-  const cameraHeightM = cameraCartographic.height;
+  const samples = sampleViewportCartographics(engine);
+  const cameraHeightM = cameraCartographic(engine).height;
   const viewScale = classifyViewScale(cameraHeightM);
   const cachedViewportPlaces = viewportPlacesFromCache(
     samples,
@@ -4076,23 +4125,23 @@ function coarseBasemapPlace(
   };
 }
 
-function getViewTargetCartographic(viewer) {
-  const signature = cameraViewSignature(viewer);
-  const cached = viewTargetCache.get(viewer);
+function getViewTargetCartographic(engine) {
+  const signature = cameraViewSignature(engine);
+  const cached = viewTargetCache.get(engine);
   if (
     cached?.signature === signature &&
     performance.now() - cached.cachedAt < 2500
   ) {
     return cached.target;
   }
-  const position = getViewTargetCartesian(viewer);
+  const position = getViewTargetCartesian(engine);
   // `fromCartesian` still returns undefined for a point too near the ellipsoid
   // center to project; normalize that to the same "no target" null the callers
   // already handle for a missed pick.
   const target = position
     ? geo.cartographic.fromCartesian(position) || null
     : null;
-  viewTargetCache.set(viewer, {
+  viewTargetCache.set(engine, {
     signature,
     target,
     cachedAt: performance.now(),
@@ -4100,15 +4149,16 @@ function getViewTargetCartographic(viewer) {
   return target;
 }
 
-function cameraViewSignature(viewer) {
-  const camera = viewer.camera;
-  const cartographic = camera.positionCartographic;
+function cameraViewSignature(engine) {
+  const cartographic = cameraCartographic(engine);
+  const height = engine.camera.height();
+  const { heading, pitch } = engine.camera.pose();
   return [
     geo.math.toDegrees(cartographic.latitude).toFixed(5),
     geo.math.toDegrees(cartographic.longitude).toFixed(5),
-    Math.round(cartographic.height / 2),
-    camera.heading.toFixed(3),
-    camera.pitch.toFixed(3),
+    Math.round(height / 2),
+    heading.toFixed(3),
+    pitch.toFixed(3),
   ].join(':');
 }
 
@@ -4120,55 +4170,32 @@ function cameraViewSignature(viewer) {
  * MISSED pick, so it falls through to the next stage rather than poisoning
  * every caller downstream.
  */
-function getViewTargetCartesian(viewer) {
-  const scene = viewer.scene;
-  const canvas = scene.canvas;
-  const width = canvas.clientWidth || canvas.width || 0;
-  const height = canvas.clientHeight || canvas.height || 0;
-  const center = new Cesium.Cartesian2(width / 2, height / 2);
-  let position = null;
-
-  if (scene.pickPositionSupported && typeof scene.pickPosition === 'function') {
+function getViewTargetCartesian(engine) {
+  if (!engine) return null;
+  const { width, height } = engine.host.size();
+  const center = geo.cartesian2.create(width / 2, height / 2);
+  const stages = [
+    () =>
+      engine.picker.pickPositionSupported
+        ? engine.picker.pickPosition(center)
+        : undefined,
+    () => engine.camera.pickEllipsoid(center),
+    () => engine.picker.pickGlobe(center),
+  ];
+  for (const stage of stages) {
+    let position = null;
     try {
-      position = scene.pickPosition(center);
+      position = stage();
     } catch {
       position = null;
     }
+    if (isPickedWorldPosition(position)) return position;
   }
-
-  if (
-    !isPickedWorldPosition(position) &&
-    viewer.camera &&
-    typeof viewer.camera.pickEllipsoid === 'function'
-  ) {
-    try {
-      position = viewer.camera.pickEllipsoid(center, Cesium.Ellipsoid.WGS84);
-    } catch {
-      position = null;
-    }
-  }
-
-  if (
-    !isPickedWorldPosition(position) &&
-    viewer.camera &&
-    typeof viewer.camera.getPickRay === 'function'
-  ) {
-    try {
-      const ray = viewer.camera.getPickRay(center);
-      position = scene.globe?.pick(ray, scene) || null;
-    } catch {
-      position = null;
-    }
-  }
-
-  return isPickedWorldPosition(position) ? position : null;
+  return null;
 }
 
-function sampleViewportCartographics(viewer) {
-  const scene = viewer.scene;
-  const canvas = scene.canvas;
-  const width = canvas.clientWidth || canvas.width || 0;
-  const height = canvas.clientHeight || canvas.height || 0;
+function sampleViewportCartographics(engine) {
+  const { width, height } = engine.host.size();
   if (!width || !height) return [];
 
   const points = [
@@ -4183,9 +4210,8 @@ function sampleViewportCartographics(viewer) {
 
   const samples = [];
   for (const [x, y] of points) {
-    const cartesian = viewer.camera.pickEllipsoid(
+    const cartesian = engine.camera.pickEllipsoid(
       geo.cartesian2.create(width * x, height * y),
-      Cesium.Ellipsoid.WGS84,
     );
     if (!isPickedWorldPosition(cartesian)) continue;
     const carto = geo.cartographic.fromCartesian(cartesian);
@@ -4664,7 +4690,7 @@ function layerIsWarming(enabledAt, layerKey) {
 }
 
 function analystProviders(
-  viewer,
+  engine,
   dataManager,
   {
     recordLimitByLayer = null,
@@ -4751,7 +4777,7 @@ function analystProviders(
       };
     },
     getViewContext() {
-      const carto = viewer.camera.positionCartographic;
+      const carto = cameraCartographic(engine);
       const altKm = carto.height / 1000;
       // View radius scales with altitude: street-level asks stay local,
       // country-level asks sweep wide. Clamped so "in view" is never absurd.

src/voice/gevActions.test.mjs

@@ -25,7 +25,8 @@ import { GEV_REALTIME_TOOLS } from '../../server/providers/openai/tools.js';
 import { presentResult } from './resultDisplay.js';
 import { attachVoiceResult } from './speech.js';
 import { createCesiumEngine } from '../globe/cesium/createCesiumEngine.js';
-import { registerViewerEngine } from '../globe/cesium/engineFromViewer.js';
+import { engineFromViewer, registerViewerEngine } from '../globe/cesium/engineFromViewer.js';
+import { createFakeEngine } from '../globe/testing/fakeEngine.js';
 
 test('every live basemap is reachable by its own id — no enum value without a voice alias', () => {
   // B1 regression: a stack added to MAP_STACKS (and the set_map_stack enum)
@@ -125,6 +126,9 @@ function createVoiceNavigationHarness({ cockpitActive = false } = {}) {
       positionCartographic: Cesium.Cartographic.fromCartesian(position),
       heading: Cesium.Math.toRadians(28),
       pitch: Cesium.Math.toRadians(-45),
+      // The rest of the pose the engine camera reads (camera.pose()).
+      roll: 0,
+      frustum: { fovy: 1, aspectRatio: 1.5 },
       cancelFlight() { order.push('cancel'); },
       flyToBoundingSphere() {
         order.push(`fly:${viewer.trackedEntity === undefined ? 'released' : 'owned'}`);
@@ -2582,6 +2586,9 @@ function createPrewarmHarness({ pickPosition, positionCartographic } = {}) {
     positionWC: position,
     heading: Cesium.Math.toRadians(28),
     pitch: Cesium.Math.toRadians(-45),
+    // The rest of the pose the engine camera reads (camera.pose()).
+    roll: 0,
+    frustum: { fovy: 1, aspectRatio: 1.5 },
     pickEllipsoid() { calls.pickEllipsoid += 1; return surface; },
     getPickRay() { calls.getPickRay += 1; return null; },
     cancelFlight() {},
@@ -3236,7 +3243,27 @@ test('voice Radio: the keyless path applies no country filter the keyed path wou
 });
 
 const testPlaceSearch = () => createStandalonePlaceSearch({ resolveApiKey: () => globalThis.window?.__GOOGLE_MAPS_API_KEY__ });
-function createGevActionRunner(options) { return createActionRunner({ placeSearch: testPlaceSearch(), ...options }); }
+function createGevActionRunner(options) {
+  registerTestEngine(options.viewer);
+  return createActionRunner({ placeSearch: testPlaceSearch(), ...options });
+}
+/**
+ * The runner drives the globe engine registered for its viewer, as the app's
+ * scene engine is (src/app/globeEngine.js): a test viewer gets the Cesium
+ * engine over it or, when its camera only states where it is
+ * (positionCartographic), a fake engine at that place.
+ */
+function registerTestEngine(viewer) {
+  if (!viewer || engineFromViewer(viewer)) return;
+  const camera = viewer.camera ?? {};
+  const place = Object.getOwnPropertyDescriptor(camera, 'positionCartographic')?.value;
+  registerViewerEngine(
+    viewer,
+    !camera.positionWC && place
+      ? createFakeEngine({ longitude: place.longitude, latitude: place.latitude, altitude: place.height })
+      : createCesiumEngine(viewer),
+  );
+}
 function controlRadio(viewer, manager, args, options) { return runControlRadio(viewer, manager, args, { placeSearch: testPlaceSearch(), ...options }); }
 
 test('ALPR common names toggle only the registered camera layer through the normal voice action', async () => {

src/voice/gevActionsEngine.test.mjs

@@ -0,0 +1,422 @@
+// The W1 voice actions on the globe engine (phase 3, Task 9): the same
+// results as on the Cesium viewer, through engine.camera / picker /
+// projector only, and a structured refusal for the actions that still need
+// a viewer when there is none (the Navara engine).
+
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+import * as Cesium from 'cesium';
+import * as geo from '../geo/index.js';
+import { createFakeEngine } from '../globe/testing/fakeEngine.js';
+import { GEV_ACTION_SCHEMAS } from './actionSchemas.js';
+import {
+  UNAVAILABLE_ON_ENGINE,
+  VIEWER_ONLY_ACTIONS,
+  createGevActionRunner,
+} from './gevActions.js';
+import { cameraPoseKey } from './pointerContext.js';
+import { createPointerPicker } from './pointerPick.js';
+import { renderFreshFrame } from './realtimeViewport.js';
+
+globalThis.window ||= {
+  setTimeout,
+  clearTimeout,
+  requestIdleCallback: null,
+};
+
+const toRad = geo.math.toRadians;
+
+/** A fake engine over Austin at `altitude`, looking straight down. */
+function engineOverAustin(options = {}) {
+  return createFakeEngine({
+    longitude: toRad(-97.74),
+    latitude: toRad(30.27),
+    altitude: 20_000,
+    ...options,
+  });
+}
+
+/** The UI navigation seam, without its policy: runs the move. */
+const navigatingStyleManager = (extra = {}) => ({
+  runImmediateNavigation: (noun, navigate) => navigate(),
+  ...extra,
+});
+
+function dataManagerWith(modules, { enabled = Object.keys(modules) } = {}) {
+  const on = new Set(enabled);
+  const params = [];
+  return {
+    params,
+    layers: new Map(
+      Object.entries(modules).map(([id, module]) => [id, { id, module }]),
+    ),
+    isEnabled: (id) => on.has(id),
+    getAll: () =>
+      Object.keys(modules).map((id) => ({
+        id,
+        name: id,
+        enabled: on.has(id),
+        stats: modules[id]?.getStats?.() || {},
+      })),
+    setLayerParams(id, values) {
+      params.push({ id, values });
+      return true;
+    },
+    async setEnabled(id, value) {
+      if (value) on.add(id);
+      else on.delete(id);
+      return true;
+    },
+  };
+}
+
+const runnerOn = (engine, options = {}) =>
+  createGevActionRunner({
+    viewer: null,
+    engine,
+    styleManager: navigatingStyleManager(),
+    dataManager: dataManagerWith({}),
+    ...options,
+  });
+
+const follow = (engine, position) =>
+  engine.camera.follow({
+    position: () => position,
+    viewFrom: { x: 0, y: -2000, z: 800 },
+  });
+
+test('the viewer-only actions are one exported list of real tools', () => {
+  assert.deepEqual(VIEWER_ONLY_ACTIONS, [
+    'control_scene',
+    'annotate_map',
+    'clear_annotations',
+    'fly_route',
+    'move_camera',
+    'control_cockpit',
+    'set_context_mode',
+    'control_radio',
+    'control_cctv',
+  ]);
+  assert.ok(Object.isFrozen(VIEWER_ONLY_ACTIONS));
+  const tools = new Set(GEV_ACTION_SCHEMAS.map((schema) => schema.name));
+  for (const name of VIEWER_ONLY_ACTIONS)
+    assert.ok(tools.has(name), `${name} is a voice tool`);
+});
+
+test('without a viewer the viewer-only actions refuse with a structured result', async () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  const touched = [];
+  const styleManager = new Proxy(navigatingStyleManager(), {
+    get(target, key) {
+      if (typeof key === 'string') touched.push(key);
+      return target[key];
+    },
+  });
+  const runner = runnerOn(engine, { styleManager });
+  engine.fake.resetCalls();
+  for (const name of VIEWER_ONLY_ACTIONS) {
+    const result = await runner(name, { action: 'status' });
+    assert.equal(result.ok, false, name);
+    assert.equal(result.action, name);
+    assert.equal(result.unavailable, true, name);
+    assert.equal(result.code, UNAVAILABLE_ON_ENGINE, name);
+    assert.equal(result.engine, 'navara', name);
+    assert.equal(result.error, 'Unavailable on this engine', name);
+  }
+  assert.deepEqual(touched, [], 'a refusal reaches no controller');
+  assert.deepEqual(engine.fake.calls, [], 'a refusal moves no camera');
+});
+
+test('with a viewer the viewer-only actions still run', async () => {
+  const runner = createGevActionRunner({
+    viewer: {
+      clock: { onTick: { addEventListener: () => () => {} } },
+      scene: { canvas: { addEventListener() {}, removeEventListener() {} } },
+      camera: { moveEnd: { addEventListener() {} } },
+    },
+    engine: engineOverAustin(),
+    styleManager: {},
+    dataManager: dataManagerWith({}),
+  });
+  const radio = await runner('control_radio', { action: 'status' });
+  assert.equal(radio.error, 'Radio layer unavailable');
+  assert.equal(radio.unavailable, undefined);
+});
+
+test('the runner warms the view target on the engine camera, once per engine', () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  runnerOn(engine);
+  runnerOn(engine);
+  assert.equal(engine.camera.moveEnd.numberOfListeners, 1);
+});
+
+test('stop_tracking stops the engine follow', async () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  const target = geo.cartesian3.fromDegrees(-97.7, 30.3, 9000);
+  follow(engine, target);
+  assert.ok(engine.camera.following());
+  const released = [];
+  const runner = runnerOn(engine, {
+    dataManager: dataManagerWith({
+      flights: {
+        getTrackedInfo: () => ({ id: 'abc' }),
+        stopTracking: () => released.push('flights'),
+      },
+    }),
+  });
+  const result = await runner('stop_tracking');
+  assert.equal(result.ok, true);
+  assert.deepEqual(result.released, ['flights']);
+  assert.equal(engine.camera.following(), null);
+});
+
+test('zoom_to_globe leaves the follow and flies the engine camera', async () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  follow(engine, geo.cartesian3.fromDegrees(-97.7, 30.3, 9000));
+  const runner = runnerOn(engine);
+  const result = await runner('zoom_to_globe');
+  assert.equal(result.ok, true);
+  assert.equal(result.heightKm > 1000, true);
+  assert.equal(engine.camera.following(), null);
+  assert.equal(engine.fake.callsOf('camera.flyTo').length, 1);
+});
+
+test('fly_to_location to coordinates leaves the follow and flies the engine', async () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  follow(engine, geo.cartesian3.fromDegrees(-97.7, 30.3, 9000));
+  const runner = runnerOn(engine);
+  const result = await runner('fly_to_location', {
+    latitude: 51.5,
+    longitude: -0.12,
+  });
+  assert.equal(result.ok, true);
+  assert.equal(result.navigationMode, 'close-coordinate');
+  assert.equal(engine.camera.following(), null);
+  assert.equal(engine.fake.callsOf('camera.flyToSphere').length, 1);
+  engine.fake.frames(400, 16);
+  const place = engine.camera.pose().cartographic;
+  assert.ok(Math.abs(geo.math.toDegrees(place.latitude) - 51.5) < 0.05);
+});
+
+test('track_entity flies to a vessel through the engine', async () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  let selected = null;
+  const runner = runnerOn(engine, {
+    dataManager: dataManagerWith({
+      'ais-live-vessels': {
+        findByQuery: () => ({
+          mmsi: 366999999,
+          name: 'EVER GIVEN',
+          latitude: 29.7,
+          longitude: -95.0,
+        }),
+        selectById: (mmsi) => (selected = mmsi),
+      },
+    }),
+  });
+  const result = await runner('track_entity', {
+    query: 'ever given',
+    layerId: 'ais-live-vessels',
+  });
+  assert.equal(result.ok, true);
+  assert.equal(result.label, 'EVER GIVEN');
+  assert.equal(selected, 366999999);
+  assert.equal(engine.fake.callsOf('camera.flyToSphere').length, 1);
+});
+
+test('frame_overhead frames the nearby contacts with flyToSphere as on Cesium', async () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  const center = engine.camera.pickEllipsoid({ x: 512, y: 384 });
+  const positions = [
+    geo.cartesian3.fromDegrees(-97.7, 30.3, 9000),
+    geo.cartesian3.fromDegrees(-97.9, 30.1, 11000),
+    geo.cartesian3.fromDegrees(-97.5, 30.5, 10000),
+  ];
+  let asked = null;
+  const runner = runnerOn(engine, {
+    dataManager: dataManagerWith({
+      flights: {
+        getNearby(at, radiusM, limit) {
+          asked = { at, radiusM, limit };
+          return positions.map((position, index) => ({
+            id: `F${index}`,
+            icao24: `a${index}`,
+            label: `F${index}`,
+            position,
+          }));
+        },
+      },
+    }),
+  });
+  const heading = engine.camera.pose().heading;
+  const result = await runner('frame_overhead', { target: 'flights' });
+  assert.equal(result.ok, true);
+  assert.equal(result.count, 3);
+  assert.equal(asked.radiusM, 150_000);
+  assert.equal(asked.limit, 80);
+  assert.ok(geo.cartesian3.distance(asked.at, center) < 1e-6);
+  // The same sphere and offset the Cesium path flew.
+  const sphere = Cesium.BoundingSphere.fromPoints(positions);
+  const radius = Math.max(sphere.radius * 1.25, 8000);
+  const [call] = engine.fake.callsOf('camera.flyToSphere');
+  const [flown, options] = call.args;
+  assert.ok(geo.cartesian3.distance(flown.center, sphere.center) < 1e-6);
+  assert.equal(flown.radius, radius);
+  assert.equal(options.duration, 2);
+  assert.equal(options.heading, heading);
+  assert.equal(options.pitch, toRad(-62));
+  assert.equal(options.range, radius * 2.4);
+});
+
+test('next_iss_pass observes from the engine camera', async () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  let observer = null;
+  const runner = runnerOn(engine, {
+    dataManager: dataManagerWith({
+      satellites: {
+        getNextIssPass(options) {
+          observer = options;
+          return { status: 'none' };
+        },
+      },
+    }),
+  });
+  const result = await runner('next_iss_pass');
+  assert.equal(result.ok, false);
+  assert.ok(Math.abs(observer.latDeg - 30.27) < 1e-6);
+  assert.ok(Math.abs(observer.lonDeg + 97.74) < 1e-6);
+});
+
+test('get_current_view_state reads the engine camera', async () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  const runner = runnerOn(engine, {
+    styleManager: navigatingStyleManager({ activeStyle: 'noir' }),
+  });
+  const result = await runner('get_current_view_state');
+  assert.equal(result.ok, true);
+  assert.ok(Math.abs(result.camera.latitude - 30.27) < 1e-6);
+  assert.ok(Math.abs(result.camera.longitude + 97.74) < 1e-6);
+  assert.ok(Math.abs(result.camera.heightM - 20_000) < 1e-3);
+});
+
+test('adjust_camera_zoom moves the engine camera toward the view target', async () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  const runner = runnerOn(engine);
+  const result = await runner('adjust_camera_zoom', {
+    direction: 'in',
+    amount: 'medium',
+  });
+  assert.equal(result.ok, true);
+  assert.equal(result.movementRequestedM, 11_000);
+  assert.equal(result.movementActualM, 11_000);
+  assert.equal(result.afterHeightM, 9000);
+  assert.equal(engine.fake.callsOf('camera.cancelFlight').length, 1);
+});
+
+test('get_entity_context samples the view through the engine', async () => {
+  // Continental: no reverse geocoding, every viewport sample on the globe.
+  const engine = engineOverAustin({ kind: 'navara', altitude: 4_000_000 });
+  const runner = runnerOn(engine);
+  const result = await runner('get_entity_context', { scope: 'in_view' });
+  assert.equal(result.ok, true);
+  assert.equal(result.scene.camera.heightM, 4_000_000);
+  assert.equal(result.scene.basemap.viewScale, 'continental');
+  assert.equal(result.scene.basemap.viewportSamples.length, 7);
+  // The view centre, on the ellipsoid under the camera.
+  const [centre] = result.scene.basemap.viewportSamples;
+  assert.ok(Math.abs(centre.latitude - 30.27) < 0.1);
+  assert.equal(centre.longitude, -97.74);
+});
+
+test('select_nearest_aircraft runs on the engine end to end', async () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  let tracked = null;
+  const flights = {
+    getStats: () => ({ count: 2, source: 'fixture' }),
+    getAnalystRecords: () => [
+      {
+        id: 'FAR1',
+        icao24: 'f1',
+        callsign: 'FAR1',
+        lat: 30.4,
+        lon: -97.7,
+        onGround: false,
+      },
+      {
+        id: 'NEAR1',
+        icao24: 'n1',
+        callsign: 'NEAR1',
+        lat: 30.3,
+        lon: -97.7,
+        onGround: false,
+      },
+    ],
+    findByQuery: (query) =>
+      query === 'n1'
+        ? { icao24: 'n1', callsign: 'NEAR1', latitude: 30.3, longitude: -97.7 }
+        : null,
+    trackById: (id) => (tracked = id),
+  };
+  const dataManager = dataManagerWith({ flights }, { enabled: [] });
+  dataManager.refreshLayer = async () => true;
+  const runner = runnerOn(engine, { dataManager });
+  const pending = runner('select_nearest_aircraft', {
+    latitude: 30.27,
+    longitude: -97.74,
+  });
+  for (let index = 0; index < 50 && !tracked; index++) {
+    engine.fake.frames(20, 16);
+    await new Promise((resolve) => setImmediate(resolve));
+  }
+  const result = await pending;
+  assert.equal(result.ok, true, result.error);
+  assert.equal(result.aircraft.id, 'n1');
+  assert.equal(tracked, 'n1');
+});
+
+test('the camera pose key reads the engine as it reads the viewer', () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  const pose = engine.camera.pose();
+  const viewer = {
+    camera: {
+      positionWC: pose.position,
+      heading: pose.heading,
+      pitch: pose.pitch,
+      roll: pose.roll,
+    },
+  };
+  assert.equal(typeof cameraPoseKey(engine), 'string');
+  assert.equal(cameraPoseKey(engine), cameraPoseKey(viewer));
+});
+
+test('the pointer picker picks through the engine', () => {
+  const engine = engineOverAustin({ kind: 'navara' });
+  engine.fake.script('pick', { id: { __gevContextId: 'none' } });
+  const pick = createPointerPicker({ engine, dataManager: null });
+  const result = pick(512, 384);
+  assert.equal(result.entity, null);
+  assert.ok(Math.abs(result.ground.lat - 30.27) < 1e-4);
+  assert.ok(Math.abs(result.ground.lon + 97.74) < 1e-4);
+  assert.equal(result.radiusKm, 15);
+  assert.equal(result.cameraKey, cameraPoseKey(engine));
+  const [screen] = engine.fake.callsOf('picker.pick')[0].args;
+  assert.deepEqual([screen.x, screen.y], [512, 384]);
+});
+
+test('a fresh frame for capture comes from the engine render loop', async () => {
+  const previous = globalThis.document;
+  try {
+    globalThis.document = { hidden: false };
+    const engine = engineOverAustin({ kind: 'navara' });
+    engine.fake.resetCalls();
+    const fresh = renderFreshFrame(engine);
+    assert.equal(engine.fake.renderRequests, 1);
+    engine.fake.frame();
+    assert.equal(await fresh, true);
+    globalThis.document = { hidden: true };
+    assert.equal(await renderFreshFrame(engine), false);
+    assert.equal(engine.fake.renderRequests, 1, 'no render while hidden');
+  } finally {
+    globalThis.document = previous;
+  }
+});

src/voice/gevRealtime.js

@@ -5,6 +5,7 @@ import { createVoiceCommands } from './commands.js';
 import { cameraPoseKey, createPointerTracker } from './pointerContext.js';
 import { createPointerPicker } from './pointerPick.js';
 import { createReferentRegistry } from './referents.js';
+import { engineFromViewer } from '../globe/cesium/engineFromViewer.js';
 export * from './realtimeController.js';
 
 const ACTION_NAMES = new Set(GEV_ACTION_SCHEMAS.map((schema) => schema.name));
@@ -30,10 +31,15 @@ export function withToolCatalog(runner, loadCatalog) {
   return runGevTool;
 }
 
-/** Compose the standalone action runner with the voice controls. */
+/**
+ * Compose the standalone action runner with the voice controls, on the globe
+ * `engine` (by default the one registered for `options.viewer`). Without a
+ * viewer (the Navara engine) the runner refuses the viewer-only tools.
+ */
 export function initGevVoiceCommands(options) {
-  const canvas = options.viewer?.scene?.canvas || null;
-  const cameraKey = () => cameraPoseKey(options.viewer);
+  const engine = options.engine ?? engineFromViewer(options.viewer);
+  const canvas = engine?.host.canvas || null;
+  const cameraKey = () => cameraPoseKey(engine);
   // Point-and-ask: the tracker and referents are shared by the runner (which
   // resolves 'pointer' and referent:n) and the controls (which snapshot the
   // pointer at turn start and clear both when the session ends).
@@ -42,7 +48,7 @@ export function initGevVoiceCommands(options) {
         element: canvas,
         cameraKey,
         pick: createPointerPicker({
-          viewer: options.viewer,
+          engine,
           dataManager: options.dataManager,
         }),
       })
@@ -55,7 +61,7 @@ export function initGevVoiceCommands(options) {
     pointer,
     referents,
     runner: withToolCatalog(
-      createGevActionRunner({ ...options, deixis }),
+      createGevActionRunner({ ...options, engine, deixis }),
       options.toolCatalog,
     ),
   });

src/voice/pointerContext.js

@@ -19,6 +19,8 @@
  * Provider-neutral and Cesium-free: the pick is injected.
  */
 
+import { isGlobeEngine } from '../globe/contract.js';
+
 /** Movement below this many CSS pixels is still the same dwell. */
 export const POINTER_DWELL_PX = 12;
 /** Stillness that makes a dwell point. */
@@ -57,11 +59,16 @@ const finite = finiteOrNull;
  * Camera pose identity: position to 1 m, orientation to about 0.06 degrees.
  * A pixel read under one key names nothing under another. Reads plain
  * numbers only, so it needs no Cesium import.
- * @param {object} viewer Cesium viewer.
+ * @param {object} globe The globe engine (its camera pose), or a Cesium
+ *   viewer.
  * @returns {string|null}
  */
-export function cameraPoseKey(viewer) {
-  const camera = viewer?.camera;
+export function cameraPoseKey(globe) {
+  let camera = globe?.camera;
+  if (isGlobeEngine(globe)) {
+    const pose = camera.pose();
+    camera = { ...pose, positionWC: pose.position };
+  }
   const p = camera?.positionWC;
   if (!p || !Number.isFinite(p.x)) return null;
   const angle = (value) => Math.round((Number(value) || 0) * 1000);

src/voice/pointerPick.js

@@ -11,37 +11,35 @@ export function pointerRadiusKm(cameraHeightM) {
 }
 
 /**
- * The Cesium side of point-and-ask: one entity pick and one depth-aware world
- * pick at canvas CSS pixels. Called lazily by the pointer tracker (dwell and
- * snapshot only), never per mouse move.
+ * The globe side of point-and-ask: one object pick (engine.picker.pick) and
+ * one depth-aware world pick at canvas CSS pixels, on either engine. Called
+ * lazily by the pointer tracker (dwell and snapshot only), never per mouse
+ * move.
  * @param {object} options
- * @param {object} options.viewer Cesium viewer.
+ * @param {object} options.engine The globe engine.
  * @param {object} [options.dataManager] Layer lifecycle.
  * @param {Function} [options.pickWorldFromScreen] Normalized-pixel world pick.
  * @returns {(x: number, y: number) => {entity: object|null, ground: object|null, radiusKm: number}|null}
  */
 export function createPointerPicker({
-  viewer,
+  engine,
   dataManager = null,
   pickWorldFromScreen = defaultAnnotationResolver.pickWorldFromScreen,
 }) {
   return function pickPointer(x, y) {
-    const scene = viewer?.scene;
-    const canvas = scene?.canvas;
-    if (!scene || !canvas) return null;
-    const width = canvas.clientWidth || canvas.width || 0;
-    const height = canvas.clientHeight || canvas.height || 0;
+    if (!engine || engine.isDestroyed?.()) return null;
+    const { width, height } = engine.host.size();
     if (!width || !height) return null;
     let picked = null;
     try {
-      picked = scene.pick(geo.cartesian2.create(x, y));
+      picked = engine.picker.pick(geo.cartesian2.create(x, y)) ?? null;
     } catch {
       picked = null;
     }
     const entity = resolvePickedContext(picked, { dataManager });
     let ground = null;
     try {
-      const hit = pickWorldFromScreen(viewer, x / width, y / height);
+      const hit = pickWorldFromScreen(engine, x / width, y / height);
       if (hit && Number.isFinite(hit.lat) && Number.isFinite(hit.lon))
         ground = {
           lat: hit.lat,
@@ -54,8 +52,8 @@ export function createPointerPicker({
     return {
       entity,
       ground,
-      radiusKm: pointerRadiusKm(viewer.camera?.positionCartographic?.height),
-      cameraKey: cameraPoseKey(viewer),
+      radiusKm: pointerRadiusKm(engine.camera.height()),
+      cameraKey: cameraPoseKey(engine),
     };
   };
 }

src/voice/realtimeViewport.js

@@ -3,10 +3,22 @@ import {
   hasStructuredViewIdentity,
 } from './realtimeProtocol.js';
 import { cameraPoseKey } from './pointerContext.js';
+import { isGlobeEngine } from '../globe/contract.js';
 
-/** The live viewer's camera pose identity (Cesium-free read). */
+/** The page's globe engine (both engines), else its Cesium viewer. */
+function pageGlobe() {
+  const debug = globalThis.window?.__godsEyeView;
+  return debug?.engine ?? debug?.viewer ?? null;
+}
+
+/** The map canvas: the engine's host canvas, else the viewer's. */
+function pageCanvas(globe) {
+  return isGlobeEngine(globe) ? globe.host.canvas : globe?.scene?.canvas;
+}
+
+/** The live camera pose identity (Cesium-free read). */
 export function readViewerCameraKey() {
-  return cameraPoseKey(globalThis.window?.__godsEyeView?.viewer);
+  return cameraPoseKey(pageGlobe());
 }
 // Viewport-screenshot size guards (M13). The old code clamped WIDTH only, so a
 // tall portrait window produced an oversized capture whose dc.send could throw.
@@ -18,16 +30,18 @@ export const VIEWPORT_MAX_PIXELS = 1200 * 900;
 export const VIEWPORT_MAX_ENCODED_BYTES = 200 * 1024;
 
 export async function captureViewportImage() {
-  const viewer = window.__godsEyeView?.viewer;
+  // Both engines draw with preserveDrawingBuffer (Cesium's contextOptions;
+  // Navara's own WebGL2 canvas, S4), so the canvas holds the last frame.
+  const globe = pageGlobe();
   const source =
-    viewer?.scene?.canvas ||
+    pageCanvas(globe) ||
     document.querySelector('#cesiumContainer .cesium-widget canvas');
   if (!source || !source.width || !source.height) return null;
   // No fresh frame (hidden, or the bounded render wait timed out) → no
   // capture. The caller labels this image "Current"; a stale preserved
   // frame would feed the model old entities as current context. (perf
   // wave 2 fix)
-  const fresh = await renderFreshCesiumFrame(viewer);
+  const fresh = await renderFreshFrame(globe);
   if (!fresh) return null;
 
   // Clamp BOTH dimensions by a total-pixel budget so tall portrait windows are
@@ -129,10 +143,10 @@ export function pointerCropRect({
  *   the crop's normalized bounds in the full canvas, or null.
  */
 export async function capturePointerCrop(screenPx) {
-  const viewer = window.__godsEyeView?.viewer;
-  const source = viewer?.scene?.canvas;
+  const globe = pageGlobe();
+  const source = pageCanvas(globe);
   if (!source?.width || !source?.height || !screenPx) return null;
-  const fresh = await renderFreshPointerFrame(viewer);
+  const fresh = await renderFreshPointerFrame(globe);
   if (!fresh) return null;
   const rect = pointerCropRect({
     x: screenPx.x,
@@ -186,10 +200,10 @@ export async function capturePointerCrop(screenPx) {
  * Pointer crops get one bounded recovery request for a slow render loop.
  * Full-viewport captures intentionally keep their single 400 ms attempt.
  */
-export async function renderFreshPointerFrame(viewer) {
-  if (await renderFreshCesiumFrame(viewer)) return true;
+export async function renderFreshPointerFrame(globe) {
+  if (await renderFreshFrame(globe)) return true;
   if (typeof document !== 'undefined' && document.hidden) return false;
-  return renderFreshCesiumFrame(viewer);
+  return renderFreshFrame(globe);
 }
 
 // Scale (w, h) down so w*h <= maxPixels while preserving aspect ratio. Never
@@ -228,8 +242,14 @@ export function estimateDataUrlBytes(dataUrl) {
  *   when the bounded wait timed out. Callers must not label a non-fresh
  *   canvas as current. (perf wave 2)
  */
-export async function renderFreshCesiumFrame(viewer) {
-  const scene = viewer?.scene;
+export async function renderFreshFrame(globe) {
+  // The engine's frame events and render request, else the viewer's scene.
+  const scene = isGlobeEngine(globe)
+    ? {
+        postRender: globe.frames.postRender,
+        requestRender: () => globe.render.request('voice-capture'),
+      }
+    : globe?.scene;
   if (!scene) return false;
   // While the document is hidden the render loop is suspended — don't
   // secretly restart rendering for an optional screenshot, and don't pass
@@ -488,3 +508,6 @@ export class RealtimeViewport {
     return true;
   }
 }
+
+/** renderFreshFrame for callers that hold a Cesium viewer. */
+export const renderFreshCesiumFrame = renderFreshFrame;