diff --git a/docs/qa/ClaudeQAPlan.md b/docs/qa/ClaudeQAPlan.md
index 4005abb..ccbb5e0 100644
--- a/docs/qa/ClaudeQAPlan.md
+++ b/docs/qa/ClaudeQAPlan.md
@@ -82,7 +82,7 @@ confidence about *how much*, without measuring.
 So, before filing a UI defect and before acting on one:
 
 ```bash
-node scripts/qa-browser.mjs                       # production, five pages, five widths
+node scripts/qa-browser.mjs                       # production, every page in its sitemap, four widths
 node scripts/qa-browser.mjs --url http://localhost:3099 --viewports 320,768
 ```
 
diff --git a/scripts/qa-browser.mjs b/scripts/qa-browser.mjs
index 0e424ea..4e46978 100755
--- a/scripts/qa-browser.mjs
+++ b/scripts/qa-browser.mjs
@@ -51,6 +51,7 @@
 import { createRequire } from 'node:module'
 import { execSync } from 'node:child_process'
 import path from 'node:path'
+import { parseSitemap } from './lib/html-audit.js'
 
 const args = process.argv.slice(2)
 const opt = (name, dflt) => {
@@ -70,9 +71,30 @@ const collect = (name, dflt) => {
   for (let j = i + 1; j < args.length && !args[j].startsWith('--'); j++) out.push(args[j])
   return out.length ? out : dflt
 }
-const PATHS = collect('paths', ['/', '/about', '/services', '/contact', '/support'])
 const SHOTS = opt('shots', null)
 
+// The default path list used to be five hand-typed pages: the home page, about,
+// services, contact and support. That is 5 of the 18 this site serves, and it
+// included none of the service or industry pages, so a defect on any of them was
+// invisible to the tool that exists to find defects. The default is now whatever
+// the target itself says it serves.
+//
+// Failing to read the sitemap exits 2. "I checked nothing" must never look like
+// "I found nothing".
+let PATHS = collect('paths', null)
+if (!PATHS) {
+  try {
+    const response = await fetch(`${URL_BASE}/sitemap.xml`, { signal: AbortSignal.timeout(20000) })
+    if (!response.ok) throw new Error(`HTTP ${response.status}`)
+    PATHS = parseSitemap(await response.text()).map((entry) => entry.path)
+    if (!PATHS.length) throw new Error('it lists no pages')
+  } catch (e) {
+    console.error(`qa-browser: could not read ${URL_BASE}/sitemap.xml (${e.message}), so NOTHING was checked.`)
+    console.error('            Pass --paths to check specific pages instead.')
+    process.exit(2)
+  }
+}
+
 // playwright is global here. Resolve it explicitly rather than failing with a
 // bare MODULE_NOT_FOUND, which reads as "the script is broken" rather than
 // "install this".
@@ -115,6 +137,14 @@ for (const p of PATHS) {
       if (r.request().resourceType() === 'image' && r.status() >= 400) httpFailed.push(`${r.status()} ${r.url()}`)
     })
 
+    // A page that throws still paints, so every measurement below can look
+    // healthy while the page is broken. React reported a hydration mismatch on
+    // every page of this site for months and nothing here noticed, because
+    // nothing here was listening.
+    const consoleErrors = []
+    page.on('pageerror', e => consoleErrors.push(String(e).split('\n')[0]))
+    page.on('console', msg => { if (msg.type() === 'error') consoleErrors.push(msg.text().split('\n')[0]) })
+
     let resp
     try {
       resp = await page.goto(URL_BASE + p, { waitUntil: 'networkidle', timeout: 45000 })
@@ -179,6 +209,7 @@ for (const p of PATHS) {
     if (m.cls > 0.1)          { bits.push(`CLS ${m.cls}`);                     findings.push(`${p} @${width}: CLS ${m.cls} (>0.1)`) }
     if (m.lcp > 2500)         { bits.push(`LCP ${m.lcp}ms`);                   findings.push(`${p} @${width}: LCP ${m.lcp}ms (>2500)`) }
     if (m.over.length)        { bits.push(`OVERFLOW ${m.over.length}`);        findings.push(`${p} @${width}: past the right edge — ${m.over.join('; ')}`) }
+    if (consoleErrors.length) { bits.push(`JS-ERROR ${consoleErrors.length}`);  findings.push(`${p} @${width}: the page logged an error — ${[...new Set(consoleErrors)].slice(0, 2).join(' | ')}`) }
 
     say(`  ${p.padEnd(12)} @${String(width).padEnd(5)} imgs=${String(m.images).padEnd(3)} cls=${String(m.cls).padEnd(7)} lcp=${String(m.lcp + 'ms').padEnd(8)} ${bits.length ? '‼ ' + bits.join('  ') : 'ok'}`)
 
@@ -196,6 +227,6 @@ if (findings.length) {
   process.exit(1)
 }
 say(`qa-browser: nothing found across ${PATHS.length} path(s) x ${VIEWPORTS.length} viewport(s).`)
-say('            That is not "the UI is correct" — it is these five measurements,')
+say('            That is not "the UI is correct" — it is these six measurements,')
 say('            on these pages, at these widths. Nothing here opens a menu or')
 say('            uses a keyboard.')