Gate the installability probe on every condition LAUNCH.md claims (Maestro 2c8f8887, F1-F3)

F1: the probe now gates each page on manifest HTTP 200, name, display,
start_url, 192x192 and 512x512 icons, a maskable icon, and a service
worker that is ready, registered and activated. It prints a PASS/FAIL
line per condition and exits 1 if any condition fails on any page.
LAUNCH.md lists exactly these gates; the unchecked claim that the worker
controls the page is removed.

F2: navigator.serviceWorker.ready is raced against a 10 second timeout;
expiry fails the "service worker ready" condition.

F3: the browser context uses Playwright's Pixel 5 mobile emulation
(viewport, touch, isMobile, user agent), and LAUNCH.md says so.

Re-run against production mealquest:743a155 on 2026-10-11: every
condition PASS on all four pages, exit 0.

Maestro task: 2c8f8887-85e5-4734-b90f-9678f17d3778

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

AGENTS.md

@@ -85,7 +85,7 @@ behaviour, exercise it (hit the endpoint, render the page).
 | `migrations/` | SQL migrations (planned). |
 | `web/` | React PWA source. |
 | `deploy/` | Deployment files (planned). |
-| `docs/` | Project documentation, including [ARCHITECTURE.md](docs/ARCHITECTURE.md). |
+| `docs/` | Project documentation, including [ARCHITECTURE.md](docs/ARCHITECTURE.md), launch evidence in [LAUNCH.md](docs/LAUNCH.md), and Lighthouse reports in `docs/lighthouse/`. |
 | `design/` | Requirements and UI handoff. **Read-only reference** — do not edit. |
 | `Dockerfile` | Multi-stage image build, at the repository root. |
 | `Makefile` | `dev`, `test`, `build`, `docker`. |

docs/LAUNCH.md

@@ -0,0 +1,54 @@
+# Launch evidence
+
+Evidence that the production PWA meets the launch gates. The raw reports and
+the check script are committed under [lighthouse/](lighthouse/).
+
+## Run conditions
+
+| | |
+| --- | --- |
+| Target | Production, <https://mealquest.cubecraftlabs.com> |
+| Build | `mealquest:743a155` |
+| Session | Signed in (household session cookie, supplied at run time) |
+| Date | 2026-10-11 |
+| Tool | Lighthouse 13.5.0, mobile form factor |
+
+The session cookie value is redacted from the committed reports
+(`configSettings.extraHeaders`); nothing else in them is changed.
+
+## Lighthouse
+
+Reports: [lighthouse/2026-10-11/](lighthouse/2026-10-11/) — one
+`.report.json` and one `.report.html` per page.
+
+| Page | Route | Performance | Accessibility | Best practices |
+| --- | --- | --- | --- | --- |
+| Home | `/` | 71 | 100 | 100 |
+| Plan | `/plan` | 72 | 100 | 100 |
+| Discover | `/discover` | 66 | 100 | 100 |
+| Dinner detail | `/dinner/<id>` | 70 | 100 | 100 |
+
+**Gate: accessibility ≥ 95 on every page — met** (100 on all four).
+Performance is recorded for reference but is not gated.
+
+## Installability
+
+Lighthouse 10 and later removed the PWA category, so installability was checked
+directly with a Playwright probe:
+[installability-check.mjs](lighthouse/2026-10-11/installability-check.mjs).
+It loads each of the four pages above in a signed-in Chrome session with
+Playwright's Pixel 5 mobile emulation (viewport, touch, `isMobile` and mobile
+user agent; the cookie comes from the `CK` environment variable, never the
+file) and gates every page on all of:
+
+- **Manifest** — the linked manifest is fetched with HTTP 200 and has
+  `name` "MealQuest", `display` "standalone", a `start_url`, and icons at
+  192x192, 512x512 and one with `maskable` purpose.
+- **Service worker** — `navigator.serviceWorker.ready` resolves within 10
+  seconds (expiry is a failure), and a registration exists whose active worker
+  is `activated`.
+
+It prints a PASS or FAIL line per condition per page and exits 1 if any
+condition fails on any page.
+
+**Result: PASS on all four pages.**

docs/lighthouse/2026-10-11/installability-check.mjs

@@ -0,0 +1,53 @@
+import { chromium, devices } from 'playwright';
+const ck = process.env.CK;
+if (!ck) { console.error('CK (session cookie) is not set'); process.exit(2); }
+const origin = 'https://mealquest.cubecraftlabs.com';
+const pages = [['home','/'],['plan','/plan'],['discover','/discover'],['dinner','/dinner/01M4PKT9QYA6C4JCF67XE7RA6R']];
+const SW_READY_TIMEOUT_MS = 10000;
+const browser = await chromium.launch({ executablePath: '/usr/bin/google-chrome', args: ['--no-sandbox'] });
+// Mobile emulation: Pixel 5 viewport, device scale, touch, isMobile and user agent.
+const ctx = await browser.newContext({ ...devices['Pixel 5'] });
+await ctx.addCookies([{ name: '__Host-mealquest_session', value: ck, url: origin + '/' }]);
+let fail = 0;
+for (const [name, path] of pages) {
+  const page = await ctx.newPage();
+  page.on('console', m => { if (/sw|service|error/i.test(m.text())) console.log('  [console]', m.text().slice(0,120)); });
+  page.on('pageerror', e => console.log('  [pageerror]', String(e).slice(0,120)));
+  await page.goto(origin + path, { waitUntil: 'networkidle', timeout: 30000 });
+  const href = await page.evaluate(() => document.querySelector('link[rel="manifest"]')?.href || null);
+  const sw = await page.evaluate(async (ms) => {
+    const ready = await Promise.race([
+      navigator.serviceWorker.ready.then(() => 'ready', e => 'error: ' + String(e)),
+      new Promise(r => setTimeout(() => r('timeout after ' + ms + ' ms'), ms)),
+    ]);
+    const regs = await navigator.serviceWorker.getRegistrations();
+    return { ready, registrations: regs.length, state: regs[0]?.active?.state || null };
+  }, SW_READY_TIMEOUT_MS);
+  const manifest = href
+    ? await page.evaluate(async (h) => { const r = await fetch(h); return { status: r.status, body: r.ok ? await r.json() : {} }; }, href)
+    : { status: 'no manifest link', body: {} };
+  const m = manifest.body;
+  const icons = m.icons || [];
+  const hasSize = (s) => icons.some(i => (i.sizes || '').split(/\s+/).includes(s));
+  const checks = [
+    ['manifest HTTP 200', manifest.status === 200, manifest.status],
+    ['manifest name "MealQuest"', m.name === 'MealQuest', m.name],
+    ['manifest display "standalone"', m.display === 'standalone', m.display],
+    ['manifest start_url present', !!m.start_url, m.start_url],
+    ['icon 192x192', hasSize('192x192'), icons.map(i => i.sizes).join(',')],
+    ['icon 512x512', hasSize('512x512'), icons.map(i => i.sizes).join(',')],
+    ['icon purpose maskable', icons.some(i => (i.purpose || '').split(/\s+/).includes('maskable')), icons.map(i => i.purpose || 'any').join(',')],
+    ['service worker ready', sw.ready === 'ready', sw.ready],
+    ['service worker registered', sw.registrations > 0, sw.registrations],
+    ['service worker activated', sw.state === 'activated', sw.state],
+  ];
+  console.log(`${name} (${path}) url=${page.url().replace(origin, '')}:`);
+  for (const [label, ok, actual] of checks) console.log(`  ${ok ? 'PASS' : 'FAIL'} ${label} (got ${JSON.stringify(actual ?? null)})`);
+  const pass = checks.every(([, ok]) => ok);
+  if (!pass) fail++;
+  console.log(`  => ${pass ? 'INSTALLABLE' : 'NOT INSTALLABLE'}`);
+  await page.close();
+}
+await browser.close();
+console.log(fail ? `FAILED on ${fail} of ${pages.length} pages` : `PASS on all ${pages.length} pages`);
+process.exit(fail ? 1 : 0);