Make the cold-start comparison wait for the same data and attribute it

Both pages now get the same deterministic SATCAT, NASA image and wildlife
data and advance animation clocks alike; the scenario waits until each
display has published and the registries stay unchanged for two seconds,
and late-created content is attributed to its registered owner. Known
allocation counters are normalised; every slot, count and visibility is
still compared.

Infrastructure drew on attach before the camera was restored, seeding its
level of detail at the incoming engine's default view; it now draws when
the view is restored.

scripts/qa-switch-equals-cold-start.mjs

@@ -11,6 +11,7 @@ import { drawLedger } from './qa/ledger.mjs';
 import {
   COLD_START_GROUPS,
   coldStartUrl,
+  coldStartReady,
   compareColdStart,
   probeSnapshot,
   sessionExclusion,
@@ -51,42 +52,26 @@ const evidence = (strict.extra.coldStart = {
 
 async function settle(page, cold = false) {
   await whenSettled(page, { timeoutMs: 30000 });
+  await page.evaluate(() => {
+    window.__coldStartStable = null;
+  });
   await page.waitForFunction(
-    (layers, cold) => {
-      const { dataManager, engine } = window.__godsEyeView;
-      engine.render.request('qa-cold-start-readiness');
-      return layers.every((id) => {
-        const entry = dataManager.layers.get(id),
-          module = entry?.module;
-        if (!entry) return false;
-        if (cold && module.sessionState?.includes('enabled'))
-          return !entry.enabled;
-        if (
-          !entry.enabled ||
-          !entry.initialized ||
-          entry.sceneDetached ||
-          entry.refreshing
-        )
-          return false;
-        const stats = module.getStats?.() ?? {};
-        if (stats.loading || stats.refreshing) return false;
-        // These layers can be enabled with no search, route or selected subject.
-        if (
-          [
-            'directions',
-            'military-awareness',
-            'osm-places',
-            'sea-marks',
-            'ski-pistes',
-          ].includes(id)
-        )
-          return true;
-        return stats.count > 0;
-      });
-    },
+    `(() => {
+      if (!(${coldStartReady})(${JSON.stringify(layers)}, ${cold})) {
+        window.__coldStartStable = null;
+        return false;
+      }
+      const { engine } = window.__godsEyeView;
+      const key = JSON.stringify(['movers', 'lines', 'ground', 'imagery', 'meshes']
+        .flatMap((family) => engine[family].list().map(({ id, kind, count, shown }) =>
+          [family, id, kind, count, shown])).sort());
+      const now = performance.now();
+      const last = window.__coldStartStable;
+      if (!last || last.key !== key) window.__coldStartStable = { key, at: now };
+      // Cover the 450 ms infrastructure walk and deferred feed/geometry publication.
+      return last?.key === key && now - last.at >= 2000;
+    })()`,
     { timeout: 30000, polling: 100 },
-    layers,
-    cold,
   );
   await whenSettled(page, { frames: 5, timeoutMs: 30000 });
 }
@@ -328,6 +313,26 @@ await strict.run({}, async (browser) => {
       sample.failureSnapshot = await probeSnapshot(page, layers).catch(
         () => null,
       );
+      sample.readiness = await page
+        ?.evaluate(
+          (layers) =>
+            Object.fromEntries(
+              layers.map((id) => {
+                const module =
+                  window.__godsEyeView.dataManager.layers.get(id)?.module;
+                return [
+                  id,
+                  {
+                    stats: module?.getStats?.(),
+                    loading: module?.getLoadingDiagnostics?.(),
+                    lod: module?.getLodDiagnostics?.(),
+                  },
+                ];
+              }),
+            ),
+          layers,
+        )
+        .catch(() => null);
       evidence.differences.push({
         layer: layers.join(', '),
         direction,

scripts/qa/coldStart.mjs

@@ -68,6 +68,71 @@ export function coldStartUrl(href, engine) {
   return url.href;
 }
 
+/** Feed completion alone does not mean its deferred display has been drawn. */
+export function coldStartReady(layers, cold = false) {
+  const { dataManager, engine } = window.__godsEyeView;
+  engine.render.request('qa-cold-start-readiness');
+  const movers = engine.movers.list();
+  return layers.every((id) => {
+    const entry = dataManager.layers.get(id),
+      module = entry?.module;
+    if (!entry) return false;
+    if (cold && module.sessionState?.includes('enabled')) return !entry.enabled;
+    if (
+      !entry.enabled ||
+      !entry.initialized ||
+      entry.sceneDetached ||
+      entry.refreshing
+    )
+      return false;
+    const stats = module.getStats?.() ?? {};
+    if (stats.loading || stats.refreshing) return false;
+    if (id === 'local-dams' || id === 'local-datacenters')
+      return (
+        module.getLodDiagnostics().computed && engine.surface.tilesLoaded()
+      );
+    if (id === 'wildlife-sightings')
+      return (
+        movers.some((row) => row.id === id && row.count === 4) &&
+        movers.some((row) => row.id === `${id}-density` && row.count === 3)
+      );
+    if (id === 'bhote-koshi-locator')
+      return movers.some(
+        (row) =>
+          row.id === `${id}-bhote-koshi-incident-halo` &&
+          row.count === 1 &&
+          row.shown,
+      );
+    if (id === 'traffic')
+      return (
+        stats.count > 0 &&
+        movers.some(
+          (row) =>
+            row.id === 'traffic-fill' && row.count === stats.count && row.shown,
+        )
+      );
+    if (['flights', 'military', 'transit'].includes(id))
+      return (
+        stats.count > 0 &&
+        movers.some(
+          (row) => row.id.startsWith(id + '-') && row.count > 0 && row.shown,
+        )
+      );
+    // These layers can be enabled with no search, route or selected subject.
+    if (
+      [
+        'directions',
+        'military-awareness',
+        'osm-places',
+        'sea-marks',
+        'ski-pistes',
+      ].includes(id)
+    )
+      return true;
+    return stats.count > 0;
+  });
+}
+
 // Share addresses round the camera to 0.0001 degrees and whole metres/degrees.
 // World positions must still match within a metre; projected positions allow
 // two CSS pixels for that camera quantization. Counts and identities are exact.
@@ -168,19 +233,69 @@ export async function probeSnapshot(page, layers) {
   return { ...probe, ledger: await drawLedger(page) };
 }
 
+// Display allocations are not content identities. Keep every slot and its
+// generation, but number these allocator-local sequences within each family.
+// Raw evidence retains the original IDs. A lost or extra slot still differs.
+export function normalizeAllocations(snapshot) {
+  const patterns = [
+    ['imagery', /^(weather-)(\d+)$/],
+    ['imagery', /^(wind-field-)(\d+)$/],
+    ['imagery', /^(bhote-koshi-imagery-)(\d+)(-(?:left|right))$/],
+    ['lines', /^(satellites-orbit-)(\d+)$/],
+    ['movers', /^(satellites-points-)(\d+)(-\d+)$/],
+  ];
+  const ids = new Map();
+  for (const [family, pattern] of patterns) {
+    const rows = snapshot.ledger.filter(
+      (row) => row.family === family && pattern.test(row.id),
+    );
+    const sequence = [
+      ...new Set(rows.map((row) => Number(row.id.match(pattern)[2]))),
+    ].sort((a, b) => a - b);
+    for (const row of rows) {
+      const [, prefix, number, suffix = ''] = row.id.match(pattern);
+      ids.set(
+        `${family}:${row.id}`,
+        `${prefix}${sequence.indexOf(Number(number)) + 1}${suffix}`,
+      );
+    }
+  }
+  const rename = (row, family) => ({
+    ...row,
+    id: ids.get(`${family}:${row.id}`) ?? row.id,
+  });
+  return {
+    ...snapshot,
+    ledger: snapshot.ledger.map((row) => rename(row, row.family)),
+    movers: snapshot.movers.map((row) => rename(row, 'movers')),
+  };
+}
+
 /** Keep raw samples and declared exclusions beside the complete difference list. */
 export function compareColdStart(
   switched,
   cold,
   { direction, owners = {}, allow = [], sessionState = true },
 ) {
+  const ownership = normalizeAllocations({
+    ledger: Object.entries(owners).map(([key, layer]) => {
+      const colon = key.indexOf(':');
+      return { family: key.slice(0, colon), id: key.slice(colon + 1), layer };
+    }),
+    movers: [],
+  });
+  switched = normalizeAllocations(switched);
+  cold = normalizeAllocations(cold);
   const differences = [],
     skipped = [];
   const add = (layer, family, id, rows) =>
     differences.push(
       ...rows.map((row) => ({ layer, direction, family, id, ...row })),
     );
-  const layerOf = (family, id) => owners[`${family}:${id}`] ?? '[page]';
+  const layerOf = (family, id) =>
+    [...switched.ledger, ...cold.ledger, ...ownership.ledger].find(
+      (row) => row.family === family && row.id === id && row.layer,
+    )?.layer ?? '[page]';
   const ledger = compareLedgers(switched.ledger, cold.ledger, allow);
   for (const [side, rows] of [
     ['switch', ledger.onlyBefore],

scripts/qa/coldStart.test.mjs

@@ -11,6 +11,8 @@ import {
   compareColdStart,
   sessionExclusion,
   probeSnapshot,
+  normalizeAllocations,
+  coldStartReady,
 } from './coldStart.mjs';
 
 const snapshot = () => ({
@@ -256,3 +258,153 @@ test('the production probe captures all requested fields and releases its frame
   assert.equal(engine.frames.postRender.numberOfListeners, listeners);
   engine.destroy();
 });
+
+test('display allocation counters do not become content identities or hide lost slots', () => {
+  const a = snapshot(),
+    b = snapshot();
+  for (const [family, left, right, layer] of [
+    ['imagery', 'weather-4', 'weather-1', 'weather-radar'],
+    ['imagery', 'wind-field-2', 'wind-field-1', 'wind'],
+    [
+      'imagery',
+      'bhote-koshi-imagery-2-left',
+      'bhote-koshi-imagery-1-left',
+      'bhote-koshi-2026',
+    ],
+    [
+      'imagery',
+      'bhote-koshi-imagery-2-right',
+      'bhote-koshi-imagery-1-right',
+      'bhote-koshi-2026',
+    ],
+    ['lines', 'satellites-orbit-5', 'satellites-orbit-4', 'satellites'],
+    ['movers', 'satellites-points-4-4', 'satellites-points-5-4', 'satellites'],
+  ]) {
+    a.ledger.push({ family, id: left, layer, shown: true });
+    b.ledger.push({ family, id: right, layer, shown: true });
+    if (family === 'movers') {
+      a.movers.push({ id: left, count: 10, capacity: 8192 });
+      b.movers.push({ id: right, count: 10, capacity: 8192 });
+    }
+  }
+  assert.deepEqual(compareColdStart(a, b, options).differences, []);
+  assert.equal(
+    a.ledger[1].id,
+    'weather-4',
+    'raw samples retain allocation IDs',
+  );
+  b.ledger.find((row) => row.id === 'weather-1').shown = false;
+  b.ledger = b.ledger.filter((row) => row.id !== 'bhote-koshi-imagery-1-right');
+  b.movers.at(-1).count--;
+  const differences = compareColdStart(a, b, options).differences;
+  assert.deepEqual(differences.map(({ field }) => field).sort(), [
+    'count',
+    'present',
+    'shown',
+  ]);
+  assert.ok(differences.every(({ layer }) => layer !== '[page]'));
+  a.ledger.push({
+    family: 'lines',
+    id: 'satellites-orbit-7',
+    layer: 'satellites',
+    shown: false,
+  });
+  assert.equal(
+    compareColdStart(a, b, options).differences.filter(
+      ({ family }) => family === 'lines',
+    ).length,
+    1,
+  );
+  assert.equal(
+    normalizeAllocations(a).ledger.filter(({ family }) => family === 'lines')
+      .length,
+    2,
+  );
+});
+
+test('asynchronously created CCTV lines are attributed even when absent at enable', async () => {
+  const engine = createFakeEngine();
+  engine.lines.createLine({
+    id: 'cctv-camera-ray-tl',
+    widthPx: 1,
+    color: [1, 1, 1, 1],
+  });
+  const context = vm.createContext({
+    window: {
+      __godsEyeView: {
+        engine,
+        dataManager: { layers: new Map([['cctv', { module: {} }]]) },
+      },
+    },
+  });
+  const page = {
+    evaluate: async (code) =>
+      vm.runInContext(typeof code === 'string' ? code : `(${code})()`, context),
+  };
+  const capture = await probeSnapshot(page, ['cctv']);
+  assert.equal(capture.ledger[0].layer, 'cctv');
+  engine.destroy();
+});
+
+test('readiness waits for fixture publications, LOD and the locator reveal', () => {
+  const engine = createFakeEngine();
+  const dataManager = { layers: new Map() };
+  const context = vm.createContext({
+    window: { __godsEyeView: { engine, dataManager } },
+  });
+  const ready = (id) =>
+    vm.runInContext(`(${coldStartReady})([${JSON.stringify(id)}])`, context);
+  const entry = (id, extra = {}) =>
+    dataManager.layers.set(id, {
+      enabled: true,
+      initialized: true,
+      module: { getStats: () => ({ count: 10 }), ...extra },
+    });
+  entry('local-dams', { getLodDiagnostics: () => ({ computed: false }) });
+  assert.equal(ready('local-dams'), false);
+  dataManager.layers.get('local-dams').module.getLodDiagnostics = () => ({
+    computed: true,
+  });
+  assert.equal(ready('local-dams'), true);
+  entry('wildlife-sightings');
+  const animals = engine.movers.createSet({
+    id: 'wildlife-sightings',
+    kind: 'point',
+    capacity: 4,
+    point: { sizePx: 4 },
+  });
+  animals.setCount(3);
+  assert.equal(ready('wildlife-sightings'), false);
+  animals.setCount(4);
+  const density = engine.movers.createSet({
+    id: 'wildlife-sightings-density',
+    kind: 'point',
+    capacity: 3,
+    point: { sizePx: 4 },
+  });
+  density.setCount(3);
+  assert.equal(ready('wildlife-sightings'), true);
+  entry('bhote-koshi-locator');
+  const halo = engine.movers.createSet({
+    id: 'bhote-koshi-locator-bhote-koshi-incident-halo',
+    kind: 'point',
+    capacity: 1,
+    point: { sizePx: 4 },
+  });
+  assert.equal(ready('bhote-koshi-locator'), false);
+  halo.setCount(1);
+  assert.equal(ready('bhote-koshi-locator'), true);
+  entry('transit');
+  const bus = engine.movers.createSet({
+    id: 'transit-1',
+    kind: 'point',
+    capacity: 1,
+    point: { sizePx: 4 },
+  });
+  bus.set(0, { show: false });
+  bus.setCount(1);
+  assert.equal(ready('transit'), false);
+  bus.set(0, { show: true });
+  assert.equal(ready('transit'), true);
+  engine.destroy();
+});

scripts/qa/coldStartFixtures.mjs

@@ -19,8 +19,8 @@ import {
 } from '../../src/bench/satelliteFixture.js';
 import { launchFixture } from '../../src/bench/launchFixture.js';
 
-// These are the feeds used by the strict switching scenarios, with motion and
-// timestamps held fixed so page startup duration cannot change the sample.
+// These are the feeds used by the strict switching scenarios. Feed timestamps
+// stay fixed; wall time must advance for visibility throttles and fade-in.
 export async function coldStartFixtures(origin, group) {
   const epoch =
     group === 'space'
@@ -41,7 +41,8 @@ export async function coldStartFixtures(origin, group) {
   const routes = [];
   const fixtures = [];
   const route = (pattern, respond) => routes.push({ pattern, respond });
-  if (group === 'wildlife') routes.push(...wildlifeRoutes(origin).routes);
+  if (group === 'wildlife')
+    routes.push(...wildlifeRoutes(origin, { now: () => epoch }).routes);
   if (group === 'open') {
     route('https://tiles.openseamap.org/*', image);
     route('https://www.opensnowmap.org/*', image);
@@ -286,12 +287,15 @@ export async function coldStartFixtures(origin, group) {
 
 function installFeeds({ group, epoch, groups, ghost, launches, firms }) {
   const RealDate = Date;
+  const started = performance.now();
+  const now = () =>
+    group === 'space' ? epoch : epoch + performance.now() - started;
   globalThis.Date = class extends RealDate {
     constructor(...args) {
-      super(...(args.length ? args : [epoch]));
+      super(...(args.length ? args : [now()]));
     }
     static now() {
-      return epoch;
+      return Math.floor(now());
     }
   };
   localStorage.setItem('gev:first-run-mission:v1', 'suppressed');
@@ -558,6 +562,18 @@ function installFeeds({ group, epoch, groups, ghost, launches, firms }) {
       return Promise.resolve(
         new Response(groups[path.split('/').pop()] ?? groups.stations),
       );
+    if (path.startsWith('/api/celestrak-satcat/')) {
+      const tle = groups[path.split('/').pop()];
+      if (tle) {
+        const lines = tle.trim().split('\n');
+        const rows = [
+          'OBJECT_NAME,NORAD_CAT_ID,OBJECT_TYPE,OPS_STATUS_CODE,OWNER',
+        ];
+        for (let i = 0; i < lines.length; i += 3)
+          rows.push(`${lines[i]},${Number(lines[i + 1].slice(2, 7))},PAY,+,US`);
+        return Promise.resolve(new Response(rows.join('\n')));
+      }
+    }
     if (path === '/api/launches') return json(launches);
     if (path === '/api/firms') return json(firms);
     if (path === '/api/route') {
@@ -588,7 +604,7 @@ function installFeeds({ group, epoch, groups, ghost, launches, firms }) {
       });
     // Same-origin proxies must not silently turn this into a live-feed test.
     // Delegate only routes answered by the fixtures above or the strict harness.
-    if (path.startsWith('/api/')) {
+    if (url.origin === location.origin && path.startsWith('/api/')) {
       if (path === '/api/google/nearby-places') return json({ places: [] });
       if (path === '/api/setup/status') return json({ ready: true });
       if (/^\/api\/(firms|mapillary)\/status$/.test(path) && group !== 'street')

scripts/qa/coldStartFixtures.test.mjs

@@ -3,6 +3,11 @@ import test from 'node:test';
 import vm from 'node:vm';
 import { coldStartFixtures } from './coldStartFixtures.mjs';
 import { COLD_START_GROUPS } from './coldStart.mjs';
+import { createSatelliteSource } from '../../src/layers/satellites/source.js';
+import { parseSatcatCsv } from '../../src/layers/satellites/classes.js';
+import { createFakeEngine } from '../../src/globe/testing/fakeEngine.js';
+import { createTrafficDisplay } from '../../src/layers/traffic/render/display.js';
+import { createAnimation } from '../../src/layers/traffic/animation.js';
 
 const origin = 'http://127.0.0.1:4309';
 test('every group has valid strict fixture routes', async () => {
@@ -62,7 +67,8 @@ test('independent pages receive identical stationary aircraft and timestamps thr
       URL,
       Response,
       EventTarget,
-      location: { href: origin },
+      performance: { now: () => 0 },
+      location: { href: origin, origin },
       localStorage: { setItem() {} },
       window: {
         EventSource: class {},
@@ -95,3 +101,179 @@ test('independent pages receive identical stationary aircraft and timestamps thr
     '/api/unexpected-feed',
   );
 });
+
+async function installedPage(group) {
+  const fixture = await coldStartFixtures(origin, group);
+  const scripts = [];
+  await fixture.install({
+    evaluateOnNewDocument: async (fn, args) => scripts.push({ fn, args }),
+  });
+  let elapsed = 0;
+  const forwarded = [];
+  const context = vm.createContext({
+    URL,
+    Response,
+    EventTarget,
+    performance: { now: () => elapsed },
+    location: { href: origin, origin },
+    localStorage: { setItem() {} },
+    window: {
+      EventSource: class {},
+      async fetch(input) {
+        const url = new URL(input.url ?? input, origin).href;
+        forwarded.push(url);
+        const route = fixture.routes.find(({ pattern }) =>
+          new URLPattern(pattern).test(url),
+        );
+        assert.ok(route, url);
+        const response = await route.respond({ url });
+        return new Response(response.body, {
+          status: response.status ?? 200,
+          headers: { 'content-type': response.contentType },
+        });
+      },
+    },
+  });
+  for (const { fn, args } of scripts)
+    vm.runInContext(`(${fn})(${JSON.stringify(args)})`, context);
+  return {
+    fixture,
+    context,
+    forwarded,
+    advance: (ms) => {
+      elapsed += ms;
+    },
+    fetch: (url) =>
+      vm.runInContext(`window.fetch(${JSON.stringify(url)})`, context),
+  };
+}
+
+test('the page fetch guard delegates NASA snapshot APIs to their image fixture', async () => {
+  const page = await installedPage('imagery');
+  const response = await page.fetch(
+    'https://wvs.earthdata.nasa.gov/api/v1/snapshot?WIDTH=256',
+  );
+  assert.equal(response.headers.get('content-type'), 'image/png');
+  assert.ok((await response.arrayBuffer()).byteLength > 0);
+  assert.equal(page.context.window.__coldStartUnexpectedApi.length, 0);
+  await assert.rejects(page.fetch('/api/v1/snapshot'), /No cold-start fixture/);
+});
+
+test('every TLE group has matching deterministic SATCAT records on both pages', async () => {
+  const a = await installedPage('space'),
+    b = await installedPage('space');
+  for (const group of [
+    'stations',
+    'visual',
+    'gps-ops',
+    'glo-ops',
+    'galileo',
+    'geo',
+    'starlink',
+    'resource',
+    'weather',
+    'planet',
+    'sar',
+    'science',
+  ]) {
+    const source = createSatelliteSource({ fetchImpl: a.fetch });
+    const catalog = await source.readSatcat(group);
+    assert.equal(catalog.ok, true);
+    assert.equal(
+      catalog.text,
+      await (await b.fetch(`/api/celestrak-satcat/${group}`)).text(),
+    );
+    const tle = (await source.readGroup(group)).text;
+    assert.equal(
+      parseSatcatCsv(catalog.text).size,
+      tle.trim().split('\n').length / 3,
+    );
+  }
+  assert.equal(a.context.window.__coldStartUnexpectedApi.length, 0);
+});
+
+test('wall time advances for fades and visibility while the orbit epoch stays fixed', async () => {
+  for (const group of ['aircraft', 'traffic', 'space']) {
+    const page = await installedPage(group);
+    const before = vm.runInContext('Date.now()', page.context);
+    page.advance(2000);
+    assert.equal(
+      vm.runInContext('Date.now()', page.context) - before,
+      group === 'space' ? 0 : 2000,
+    );
+    assert.equal(
+      vm.runInContext('+new Date()', page.context),
+      vm.runInContext('Date.now()', page.context),
+    );
+  }
+});
+
+test('traffic uses deterministic road and flow tiles', async () => {
+  const page = await installedPage('traffic');
+  assert.equal(
+    (await (await page.fetch('/api/tomtom/status')).json()).hasKey,
+    true,
+  );
+  for (const url of [
+    'https://tiles.openfreemap.org/qa-traffic/14/3743/6745.pbf',
+    '/api/tomtom/flow/12/935/1686.pbf',
+  ])
+    assert.ok((await (await page.fetch(url)).arrayBuffer()).byteLength > 0);
+});
+
+test('traffic dots finish their birth fade with the fixture clock', async (t) => {
+  const page = await installedPage('traffic');
+  t.mock.method(Date, 'now', () => vm.runInContext('Date.now()', page.context));
+  const engine = createFakeEngine();
+  const display = createTrafficDisplay(engine);
+  t.after(() => {
+    display.destroy();
+    engine.destroy();
+  });
+  const point = {
+    position: { x: 6378137, y: 0, z: 0 },
+    show: true,
+    pixelSize: 6,
+    color: { red: 1, green: 1, blue: 1, alpha: 1 },
+    outlineWidth: 0,
+  };
+  const dot = {
+    point,
+    born: Date.now(),
+    nominalSize: 6,
+    direction: 1,
+    segIdx: 0,
+    numSegments: 1,
+    t: 0.5,
+    mps: 1,
+    stoppedUntil: 0,
+    segmentDist: [1000],
+    waypoints: [point.position, { x: 6378137, y: 1000, z: 0 }],
+  };
+  const animation = createAnimation({
+    state: {
+      _enabled: true,
+      _renderHeld: true,
+      _engine: engine,
+      _display: display,
+      _dots: [dot],
+      _lastAnimTime: Date.now(),
+      _animFrame: 0,
+    },
+    services: {},
+    parts: { rendering: {}, retention: { easeHeights() {} } },
+  });
+  animation.animate();
+  animation.drawDots();
+  assert.equal(
+    engine.movers.list().find(({ id }) => id === 'traffic-fill').count,
+    0,
+  );
+  page.advance(200);
+  animation.animate();
+  animation.drawDots();
+  assert.equal(
+    engine.movers.list().find(({ id }) => id === 'traffic-fill').count,
+    1,
+  );
+});

scripts/qa/ledger.mjs

@@ -1,12 +1,25 @@
 /** The five public drawing registries, with no SDK objects or volatile fields. */
 export function drawLedger(page) {
   return page.evaluate(() => {
-    const { engine } = window.__godsEyeView;
+    const { engine, dataManager } = window.__godsEyeView;
+    const owners = [...(dataManager?.layers.keys() ?? [])].sort(
+      (a, b) => b.length - a.length,
+    );
+    const ownerOf = (id) =>
+      owners.find((owner) => id === owner || id.startsWith(owner + '-')) ??
+      (id.startsWith('wind-field-') ? 'wind' : undefined) ??
+      (id.startsWith('bhote-koshi-imagery-') ||
+      id.startsWith('bhote-koshi-flood-')
+        ? 'bhote-koshi-2026'
+        : undefined);
     return ['movers', 'lines', 'ground', 'imagery', 'meshes']
       .flatMap((family) =>
         engine[family].list().map((row) => ({
           id: String(row.id),
           family,
+          ...(ownerOf(String(row.id))
+            ? { layer: ownerOf(String(row.id)) }
+            : {}),
           ...(row.kind === undefined ? {} : { kind: row.kind }),
           ...(row.count === undefined ? {} : { count: row.count }),
           shown: row.shown ?? true,

src/layers/infrastructure/index.js

@@ -78,6 +78,7 @@ export function createInfrastructureSessionLayer(
     request = null,
     abort = null,
     display = null,
+    sceneContext = null,
     enabled = false,
     destroyed = false;
   let updated = null,
@@ -110,6 +111,8 @@ export function createInfrastructureSessionLayer(
     try {
       const next = await read();
       if (!enabled || destroyed) return;
+      if (sceneContext?.viewReady === false || sceneContext?.signal?.aborted)
+        return;
       const active = display;
       if (active) {
         error = null;
@@ -138,8 +141,10 @@ export function createInfrastructureSessionLayer(
     init(_viewer, options = {}) {
       if (options.engine) return this.attachRenderer(options);
     },
-    attachRenderer({ engine = null, signal = null } = {}) {
+    attachRenderer(options = {}) {
+      const { engine = null, signal = null } = options;
       if (display) throw Error('Infrastructure display already attached');
+      sceneContext = options;
       display = engine ? createDisplay(engine, config, services) : null;
       // The dataset load belongs to the session and keeps running; only this
       // scene's wait for it ends when the scene is released. A released
@@ -149,6 +154,10 @@ export function createInfrastructureSessionLayer(
           if (!signal?.aborted) throw error;
         });
     },
+    resumeViewport() {
+      // LOD keeps incumbents, so its first walk must use the restored camera.
+      if (enabled && display) return show();
+    },
     detachRenderer() {
       if (!display) return;
       const selected = services.getSelectedEntityContext?.();
@@ -158,6 +167,7 @@ export function createInfrastructureSessionLayer(
           : null;
       display.destroy();
       display = null;
+      sceneContext = null;
     },
     enable() {
       enabled = true;
@@ -196,6 +206,7 @@ export function createInfrastructureSessionLayer(
       abort?.abort();
       display?.destroy();
       display = data = null;
+      sceneContext = null;
     },
   };
 }

src/layers/infrastructure/session.test.mjs

@@ -8,6 +8,55 @@ import {
   selectEntityContext,
 } from '../../data/contextStore.js';
 import { layerFeedState } from '../../data/feedState.js';
+import { createLayerSceneContext } from '../../data/layerSceneBinding.js';
+
+test('reattached infrastructure first computes LOD at the restored camera', async (t) => {
+  t.mock.method(globalThis, 'fetch', async () => ({
+    ok: true,
+    text: async () =>
+      JSON.stringify({
+        type: 'Feature',
+        id: 'dam',
+        properties: {},
+        geometry: { type: 'Point', coordinates: [10, 20] },
+      }),
+  }));
+  const draws = [];
+  const layer = createInfrastructureSessionLayer(
+    { id: 'local-dams', url: '/dams' },
+    {},
+    (engine) => ({
+      show: () => draws.push(engine.camera.height()),
+      hide() {},
+      destroy() {},
+    }),
+  );
+  const engine = createFakeEngine();
+  t.after(() => {
+    layer.destroy();
+    engine.destroy();
+  });
+  layer.init(null, { engine });
+  await layer.enable();
+  layer.detachRenderer();
+  draws.length = 0;
+  let restore;
+  const context = createLayerSceneContext({
+    engine,
+    viewRestored: new Promise((resolve) => {
+      restore = resolve;
+    }),
+  });
+  await layer.attachRenderer(context);
+  engine.fake.frame();
+  assert.deepEqual(draws, [], 'the incoming default view never seeds LOD');
+  engine.fake.setPose({ height: 20000 });
+  restore();
+  await context.viewRestored;
+  await layer.resumeViewport();
+  assert.equal(draws.length, 1);
+  assert.ok(Math.abs(draws[0] - 20000) < 1e-6);
+});
 
 test('a bundled file delivered between planets keeps multipart IDs and is read only once', async (t) => {
   let deliver,