Run the layer acceptance under a default-deny network policy with per-layer assertion manifests and strict switch contracts

Every scenario runs through scripts/qa-strict-harness.mjs: each page, frame and worker gets an ordered block list before it runs (paid hosts and routes first, then only the preview, declared fixtures, keyless probes and cached free tile hosts), switches with real input on the picker, and records its assertions per layer and engine. The runner reads the catalog from the live page, fails any layer without an assertion on either engine, can build and serve a keyless checkout itself, and adds rapid, hidden-tab, context-loss, failure-injection, cold-chunk and soak scenarios. The main chunk gets a 1% size budget.

scripts/qa-nepal-locator-switch.mjs

@@ -1,27 +1,18 @@
 import { fromDegrees } from '../src/geo/cartesian3.js';
 import sharp from 'sharp';
-import puppeteer from 'puppeteer';
 import assert from 'node:assert/strict';
-import { blockPaidQaMaps } from './qa-map-policy.mjs';
+import { createStrict, localPreview } from './qa-strict-harness.mjs';
 
-const base = new URL(process.argv[2]);
-if (
-  !['localhost', '127.0.0.1'].includes(base.hostname) ||
-  ['', '4173', '4185', '4186', '4187', '4188', '4189', '4194'].includes(
-    base.port,
-  )
-)
-  throw new Error('Supply an unreserved local keyless preview URL');
+const base = localPreview(process.argv[2]);
 base.search = '?engine=navara&welcome=0&look=cinematic';
 base.hash =
   'v=2&lat=28.3326&lon=85.4848&alt=18000&heading=0&pitch=-90&roll=0&map=sentinel2&l=';
-const b = await puppeteer.launch({
-  headless: true,
-  args: ['--use-angle=metal', '--enable-gpu'],
+const strict = createStrict({
+  origin: base.origin,
+  layers: ['bhote-koshi-locator'],
 });
-try {
+await strict.run({ args: ['--use-angle=metal', '--enable-gpu'] }, async (b) => {
   const p = await b.newPage();
-  await blockPaidQaMaps(p);
   await p.setViewport({ width: 1024, height: 768 });
   const errors = [];
   p.on('pageerror', (e) => {
@@ -36,7 +27,7 @@ try {
   const ready = async (kind) => {
     await p.waitForFunction(
       (k) =>
-        window.__godsEyeView?.engine.kind === k &&
+        window.__godsEyeView?.engine?.kind === k &&
         !document.querySelector('#globe-engine')?.disabled &&
         !document.querySelector('.engine-switch-frame') &&
         document.querySelector('#loading-screen.hidden'),
@@ -60,7 +51,7 @@ try {
   });
   for (const kind of ['navara', 'cesium', 'navara']) {
     if ((await p.evaluate(() => window.__godsEyeView.engine.kind)) !== kind) {
-      await p.select('#globe-engine', kind);
+      await strict.pick(p, kind);
       await ready(kind);
     }
     const { same, stats, params, at } = await p.evaluate(
@@ -114,9 +105,12 @@ try {
       added,
       at,
     );
-    assert.ok(
+    await strict.check(
+      p,
+      'bhote-koshi-locator',
+      'same model; the flood path adds more than 50 cyan pixels to the same scene without it',
       added > 50,
-      'visible river differs from the same scene without a path',
+      { added },
     );
     await p.evaluate(() =>
       window.qaLocator.setParams({ presentation: 'bhote-koshi-path-overview' }),
@@ -130,7 +124,21 @@ try {
       preview: true,
     });
   });
-  await new Promise((resolve) => setTimeout(resolve, 1000));
+  await new Promise((resolve) => setTimeout(resolve, 2500));
+  // The last of three quick presentation changes is the one that stays.
+  const last = await p.evaluate(() => ({
+    params: window.qaLocator.getParams(),
+    stats: window.qaLocator.getStats(),
+  }));
+  await strict.check(
+    p,
+    'bhote-koshi-locator',
+    'the last of three quick presentation changes is the one applied',
+    last.params.presentation === 'bhote-koshi-trigger-record' &&
+      last.stats.count === 1 &&
+      !last.stats.error,
+    { presentation: last.params.presentation, count: last.stats.count },
+  );
   await p.evaluate(() =>
     window.__godsEyeView.dataManager.setEnabled('bhote-koshi-locator', false, {
       origin: 'user',
@@ -140,6 +148,4 @@ try {
   console.log(
     'PASS Nepal locator flood path and presentation retained, trigger and places update; both engines',
   );
-} finally {
-  await b.close();
-}
+});