diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index b63b381b..d8972778 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -128,6 +128,7 @@ jobs:
           node test-issue-1438-marker-css-vars.js
           node test-issue-1562-observers-summary.js
           node test-live.js
+          node test-issue-1532-live-fullscreen.js
           node test-xss-escape-sinks.js
           node test-preflight-xss-gate.js
 
diff --git a/test-all.sh b/test-all.sh
index 5d16a2b3..3a9f6992 100755
--- a/test-all.sh
+++ b/test-all.sh
@@ -48,6 +48,7 @@ node test-issue-1456-score-labels.js
 node test-issue-1461-mobile-page-actions.js
 node test-issue-1470-node-tile-helper.js
 node test-issue-1485-live-anim-z.js
+node test-issue-1532-live-fullscreen.js
 node test-issue-1473-reserved-prefixes.js
 node test-issue-1473-prefix-generator.js
 
diff --git a/test-issue-1532-live-fullscreen.js b/test-issue-1532-live-fullscreen.js
new file mode 100644
index 00000000..b901e2a6
--- /dev/null
+++ b/test-issue-1532-live-fullscreen.js
@@ -0,0 +1,190 @@
+/**
+ * #1532 — Live page: fullscreen toggle + collapse controls by default.
+ *
+ * Per triage fix path (Kpa-clawbot/CoreScope#1532):
+ *   1. `.live-controls` is collapsed by default on desktop too, not just
+ *      mobile (existing `#liveControlsToggle` reveals it).
+ *   2. A new `#liveFullscreenToggle` button sits next to ⚙ — toggles a
+ *      `body.live-fullscreen` class. CSS under that class hides
+ *      `.live-header-body`, `.live-controls-body`, `.vcr-controls`, and
+ *      `.bottom-nav`; `.live-stats-row` stays pinned (top-right).
+ *   3. Pin-icon parity with the map-controls accordion in map.js.
+ *
+ * Plus: keyboard shortcut `F` toggles fullscreen, with focus-in-input
+ * guard so it doesn't fire while typing in the node-filter.
+ *
+ * Source-invariant assertions on public/live.js + public/live.css. Same
+ * approach as test-issue-1485-live-anim-z.js so the test runs in the JS
+ * unit-test gate (no playwright/server needed).
+ */
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+let passed = 0, failed = 0;
+function assert(cond, msg) {
+  if (cond) { passed++; console.log('  ✓ ' + msg); }
+  else { failed++; console.error('  ✗ ' + msg); }
+}
+
+const liveJs  = fs.readFileSync(path.join(__dirname, 'public', 'live.js'),  'utf8');
+const liveCss = fs.readFileSync(path.join(__dirname, 'public', 'live.css'), 'utf8');
+
+// ─────────────────────────────────────────────────────────────────────
+console.log('\n=== #1532 A: #liveFullscreenToggle button declared ===');
+
+assert(
+  /id=["']liveFullscreenToggle["']/.test(liveJs),
+  '#liveFullscreenToggle id appears in live.js init() HTML template'
+);
+
+assert(
+  /liveFullscreenToggle[\s\S]{0,400}aria-label/.test(liveJs),
+  '#liveFullscreenToggle has an aria-label attribute (a11y)'
+);
+
+// Button sits *next to* the existing settings (⚙) toggle. Cheap proxy:
+// both ids appear within ~600 chars of each other in the source.
+{
+  const cIdx = liveJs.indexOf('liveControlsToggle');
+  const fIdx = liveJs.indexOf('liveFullscreenToggle');
+  assert(
+    cIdx > 0 && fIdx > 0 && Math.abs(cIdx - fIdx) < 1200,
+    '#liveFullscreenToggle is co-located with #liveControlsToggle in the header template'
+  );
+}
+
+// ─────────────────────────────────────────────────────────────────────
+console.log('\n=== #1532 B: fullscreen toggle wires body.live-fullscreen ===');
+
+// A click handler + a body class toggle. The handler must reference
+// 'live-fullscreen' (the class name CSS hangs hides off of).
+assert(
+  /liveFullscreenToggle[\s\S]{0,800}addEventListener\(\s*['"]click['"]/.test(liveJs),
+  '#liveFullscreenToggle has a click listener'
+);
+assert(
+  /document\.body\.classList\.toggle\(\s*['"]live-fullscreen['"]/.test(liveJs),
+  'click handler toggles document.body.classList["live-fullscreen"]'
+);
+
+// Persist via localStorage so the choice survives reloads.
+assert(
+  /localStorage[\s\S]{0,200}live-fullscreen/.test(liveJs),
+  'fullscreen state is persisted to localStorage (key contains "live-fullscreen")'
+);
+
+// ─────────────────────────────────────────────────────────────────────
+console.log('\n=== #1532 C: keyboard shortcut F toggles fullscreen ===');
+
+// keydown listener gated on the 'f'/'F' key, with input/textarea guard
+// so the shortcut doesn't fire while focus is in the node-filter input.
+assert(
+  /addEventListener\(\s*['"]keydown['"]/.test(liveJs),
+  'a keydown listener is registered'
+);
+assert(
+  /(key\s*===?\s*['"]f['"]|key\s*===?\s*['"]F['"]|toLowerCase\(\)\s*===?\s*['"]f['"])/.test(liveJs),
+  'keydown handler matches the F key'
+);
+// Guard: don't fire when focus is in an input/textarea/contenteditable.
+assert(
+  /(tagName[\s\S]{0,80}(INPUT|TEXTAREA)|isContentEditable|matches\([^)]*input)/i.test(liveJs),
+  'keydown handler skips when focus is in an INPUT/TEXTAREA/contenteditable'
+);
+
+// ─────────────────────────────────────────────────────────────────────
+console.log('\n=== #1532 D: CSS hides chrome under body.live-fullscreen ===');
+
+function cssHides(selector) {
+  // Match: body.live-fullscreen <whitespace> <selector> { ... display: none ... }
+  // OR a comma-list containing the selector.
+  const re = new RegExp(
+    'body\\.live-fullscreen[^{}]*' + selector.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&') +
+    '[\\s\\S]{0,600}?display\\s*:\\s*none'
+  );
+  return re.test(liveCss);
+}
+
+assert(cssHides('.live-header-body'),
+  'body.live-fullscreen hides .live-header-body (display:none)');
+assert(cssHides('.live-controls-body'),
+  'body.live-fullscreen hides .live-controls-body (display:none)');
+assert(cssHides('.vcr-controls'),
+  'body.live-fullscreen hides .vcr-controls (display:none)');
+assert(cssHides('.bottom-nav'),
+  'body.live-fullscreen hides .bottom-nav (display:none)');
+
+// .live-stats-row must remain visible AND get pinned positioning.
+// Negative: no `body.live-fullscreen .live-stats-row { display: none }`.
+{
+  const re = /body\.live-fullscreen[^{}]*\.live-stats-row[\s\S]{0,400}?display\s*:\s*none/;
+  assert(!re.test(liveCss),
+    '.live-stats-row is NOT hidden by body.live-fullscreen (must stay visible)');
+}
+// Positive: pinned positioning under fullscreen.
+assert(
+  /body\.live-fullscreen[\s\S]{0,800}?\.live-stats-row[\s\S]{0,400}?position\s*:\s*(fixed|absolute)/.test(liveCss),
+  '.live-stats-row gets fixed/absolute positioning under body.live-fullscreen'
+);
+
+// ─────────────────────────────────────────────────────────────────────
+console.log('\n=== #1532 E: .live-controls collapsed by default on desktop ===');
+
+// The pre-#1532 collapse rule lived inside @media (max-width: 768px).
+// Post-#1532 the body-toggle / hidden-attribute path must apply
+// regardless of viewport. We detect this by asserting that the
+// applyForViewport() function does NOT condition the "default collapsed"
+// behavior on narrowMql.matches alone — i.e. the unconditional path
+// also calls setExpanded(p, false) for the controls pair, OR an
+// equivalent .is-collapsed default is asserted on #liveControls.
+{
+  // Heuristic: the code path that handles wide viewports must NOT
+  // force the controls panel to always-expanded. Either both branches
+  // collapse by default (preferred), or a dedicated initial collapse
+  // is applied to liveControls regardless of MQL.
+  //
+  // We assert one of:
+  //   (a) setExpanded called with the controls pair AND false in the
+  //       unconditional / wide branch.
+  //   (b) An explicit "liveControls" / .live-controls .is-collapsed
+  //       initialization that runs at all viewports.
+  const wideBranch = /narrowMql\.matches[\s\S]{0,2000}/.exec(liveJs);
+  const elseBlockHasAlwaysExpanded =
+    /else\s*\{[\s\S]{0,800}?removeAttribute\(\s*['"]hidden['"]\s*\);[\s\S]{0,200}?remove\(\s*['"]is-collapsed['"]/.test(liveJs);
+
+  // Acceptable: code has been updated so the controls pair defaults
+  // collapsed even on desktop. We pass if either the explicit "always
+  // expanded" else-branch no longer applies to liveControls, or a
+  // separate desktop-default-collapse step is present.
+  const desktopCollapseHook =
+    /liveControls[\s\S]{0,400}?(is-collapsed|setAttribute\(\s*['"]hidden['"])/.test(liveJs) ||
+    /setExpanded\(\s*pairs\[1\][\s\S]{0,80}?,\s*false\s*\)/.test(liveJs) ||
+    /defaultCollapsed[\s\S]{0,80}?true/.test(liveJs);
+
+  assert(desktopCollapseHook,
+    '.live-controls defaults to collapsed at all viewports (not just ≤768px)');
+}
+
+// CSS supporting rule: the .is-collapsed → hide body rule must NOT be
+// gated to ≤768px any more. Detect a top-level (non-media-scoped) rule.
+{
+  // Find first top-level occurrence of `.live-controls.is-collapsed .live-controls-body`
+  // outside an @media block. Cheap test: split on @media and search the
+  // pre-media chunk.
+  const beforeFirstMedia = liveCss.split(/@media/)[0];
+  const ruleRe = /\.live-controls\.is-collapsed\s+\.live-controls-body[\s\S]{0,200}?display\s*:\s*none/;
+  // Either the rule exists outside any @media, OR the body class path
+  // (body.live-fullscreen) is what does the hiding (which the D-block
+  // already asserts). We accept the body-class path AND additionally
+  // a non-mobile-gated .is-collapsed rule for the pin-only default.
+  const collapsedOutsideMedia = ruleRe.test(beforeFirstMedia);
+  assert(collapsedOutsideMedia,
+    '.live-controls.is-collapsed → hides .live-controls-body at all viewports (rule lives outside @media max-width)');
+}
+
+// ─────────────────────────────────────────────────────────────────────
+console.log('\n=== #1532 results ===');
+console.log(`  ${passed} passed, ${failed} failed`);
+if (failed > 0) process.exit(1);