finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport #6578

Closed
Task
#7305
Closed
finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport#6578
Task
#7305
Assignees
yinlianghui
Labels
domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo

Description

@claude
claude
bot
opened on Aug 26, 2026

Found while establishing step 1 of #6570 (premise check). Recording the measurement; not proposing an implementation.

The rule

e2e/console-boot-indicator.spec.ts (Console boot continuity) defines coverage as:

constel=document.elementFromPoint(cx,cy);constok=!!el&&!!(el.closest('#root')||el.closest('#boot-splash'));

That rule reads an open modal dialog as a blank viewport, and it does so on every sample for as long as the modal is open.

The mechanism, measured

A Radix Dialog renders DialogOverlay (fixed inset-0 z-50) and DialogContent through DialogPortal, i.e. as body-level siblings of #root. So the centre hit test lands on a div that is outside both #root and #boot-splash — the exact signature the campaign treats as a blank viewport.

Both obvious repairs fail:

  • Reading the whole hit stack (document.elementsFromPoint) does not help. Radix's DismissableLayer parks pointer-events: none on <body> while a modal is open, and elements with pointer-events: none are skipped by hit testing — so #root and its whole subtree leave the stack entirely. Measured on 20/20 boots of finding(console): /organizations leaves the viewport centre uncovered for ~453ms after the org gate has handed off #6570's fixture: body { pointer-events: none }, #root with 2 child elements, a 1280x720 box and 196 characters of rendered text, and not one element of it anywhere in the hit stack.
  • aria-hidden is not a tell either: #root's aria-hidden read null on every sample.

Reproduced deliberately with two synthetic control arms on a signed-out /login boot (n=3 each, production bundle, Chromium 141):

armuncovered (top rule)uncovered (full-stack rule)white frames
untouched (control: covered)000/31
#root emptied + splash removed (control: really blank)34-3634-366/34, min channel 246
body-level overlay, app hit-testable underneath33-3800/34
body-level overlay + body{pointer-events:none} (Radix modal shape)38-4238-420/33

The last row is a fully rendered, fully visible app that both DOM rules call empty.

What separates them

The pixel ledger does, and only it. CDP Page.startScreencast at everyNthFrame: 1 with objectui#6378's white rule (no colour channel below 242) fires on the genuinely blank arm (min channel 246 — the bare page background is white) and never on the modal/overlay arms (min channel 0 — the 80%-black overlay).

Why it matters

#6569 recorded the false-NEGATIVE direction: this probe cannot fail for a gate that decides after a session exists. This is the false-POSITIVE direction of the same instrument, and it bites exactly where the campaign wants to go next. Any signed-in scenario added to this spec that lands on a surface with an auto-opened dialog — /organizations for a zero-org user is one such surface, and it is the first one anyone tried — reports a multi-hundred-millisecond uncovered window with no defect present. That already happened once: it is the whole content of #6570.

What is NOT established

  • Whether a cheap DOM-only discriminator exists at all. Geometry plus rendered-text on #root would separate these cases in the samples above, but it was not built or exercised, and it has not been shown to stay red on the genuinely blank arm.
  • Whether any other body-level portal in this codebase (toasts, popovers, tooltips, command palette) produces the same reading. Only the Radix dialog shape was measured.
  • Any rate for the false positive across surfaces. One surface, one fixture.

Measurement detail, the control-arm table and the 20-boot distribution are on #6570.

Generated by Claude Code

Generated by Claude Code

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    , 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
     blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

    Skip to content
    finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport #6578
    Closed
    Task
    #7305
    Closed
    finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport#6578
    Task
    #7305
    Assignees
    yinlianghui
    Labels
    domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
    Description
    @claude
    claude
    bot
    opened on Aug 26, 2026
    Found while establishing step 1 of #6570 (premise check). Recording the measurement; not proposing an implementation.
    The rule
    e2e/console-boot-indicator.spec.ts (Console boot continuity) defines coverage as:
    constel=document.elementFromPoint(cx,cy);constok=!!el&&!!(el.closest('#root')||el.closest('#boot-splash'));
    That rule reads an open modal dialog as a blank viewport, and it does so on every sample for as long as the modal is open.
    The mechanism, measured
    A Radix Dialog renders DialogOverlay (fixed inset-0 z-50) and DialogContent through DialogPortal, i.e. as body-level siblings of #root. So the centre hit test lands on a div that is outside both #root and #boot-splash — the exact signature the campaign treats as a blank viewport.
    Both obvious repairs fail:
    • Reading the whole hit stack (document.elementsFromPoint) does not help. Radix's DismissableLayer parks pointer-events: none on <body> while a modal is open, and elements with pointer-events: none are skipped by hit testing — so #root and its whole subtree leave the stack entirely. Measured on 20/20 boots of finding(console): /organizations leaves the viewport centre uncovered for ~453ms after the org gate has handed off #6570's fixture: body { pointer-events: none }, #root with 2 child elements, a 1280x720 box and 196 characters of rendered text, and not one element of it anywhere in the hit stack.
    • aria-hidden is not a tell either: #root's aria-hidden read null on every sample.
    Reproduced deliberately with two synthetic control arms on a signed-out /login boot (n=3 each, production bundle, Chromium 141):
    armuncovered (top rule)uncovered (full-stack rule)white frames
    untouched (control: covered)000/31
    #root emptied + splash removed (control: really blank)34-3634-366/34, min channel 246
    body-level overlay, app hit-testable underneath33-3800/34
    body-level overlay + body{pointer-events:none} (Radix modal shape)38-4238-420/33
    The last row is a fully rendered, fully visible app that both DOM rules call empty.
    What separates them
    The pixel ledger does, and only it. CDP Page.startScreencast at everyNthFrame: 1 with objectui#6378's white rule (no colour channel below 242) fires on the genuinely blank arm (min channel 246 — the bare page background is white) and never on the modal/overlay arms (min channel 0 — the 80%-black overlay).
    Why it matters
    #6569 recorded the false-NEGATIVE direction: this probe cannot fail for a gate that decides after a session exists. This is the false-POSITIVE direction of the same instrument, and it bites exactly where the campaign wants to go next. Any signed-in scenario added to this spec that lands on a surface with an auto-opened dialog — /organizations for a zero-org user is one such surface, and it is the first one anyone tried — reports a multi-hundred-millisecond uncovered window with no defect present. That already happened once: it is the whole content of #6570.
    What is NOT established
    • Whether a cheap DOM-only discriminator exists at all. Geometry plus rendered-text on #root would separate these cases in the samples above, but it was not built or exercised, and it has not been shown to stay red on the genuinely blank arm.
    • Whether any other body-level portal in this codebase (toasts, popovers, tooltips, command palette) produces the same reading. Only the Radix dialog shape was measured.
    • Any rate for the false positive across surfaces. One surface, one fixture.
    Measurement detail, the control-arm table and the 20-boot distribution are on #6570.
    Generated by Claude Code
    Generated by Claude Code
    Metadata
    Metadata
    Assignees
    Labels
    domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
    Type
    Task
    Projects
    No projects
      Milestone
      No milestone
      Relationships
      None yet
      Development
      No branches or pull requests
      Issue actions
      
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

      Skip to content
      finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport #6578
      Closed
      Task
      #7305
      Closed
      finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport#6578
      Task
      #7305
      Assignees
      yinlianghui
      Labels
      domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
      Description
      @claude
      claude
      bot
      opened on Aug 26, 2026
      Found while establishing step 1 of #6570 (premise check). Recording the measurement; not proposing an implementation.
      The rule
      e2e/console-boot-indicator.spec.ts (Console boot continuity) defines coverage as:
      constel=document.elementFromPoint(cx,cy);constok=!!el&&!!(el.closest('#root')||el.closest('#boot-splash'));
      That rule reads an open modal dialog as a blank viewport, and it does so on every sample for as long as the modal is open.
      The mechanism, measured
      A Radix Dialog renders DialogOverlay (fixed inset-0 z-50) and DialogContent through DialogPortal, i.e. as body-level siblings of #root. So the centre hit test lands on a div that is outside both #root and #boot-splash — the exact signature the campaign treats as a blank viewport.
      Both obvious repairs fail:
      • Reading the whole hit stack (document.elementsFromPoint) does not help. Radix's DismissableLayer parks pointer-events: none on <body> while a modal is open, and elements with pointer-events: none are skipped by hit testing — so #root and its whole subtree leave the stack entirely. Measured on 20/20 boots of finding(console): /organizations leaves the viewport centre uncovered for ~453ms after the org gate has handed off #6570's fixture: body { pointer-events: none }, #root with 2 child elements, a 1280x720 box and 196 characters of rendered text, and not one element of it anywhere in the hit stack.
      • aria-hidden is not a tell either: #root's aria-hidden read null on every sample.
      Reproduced deliberately with two synthetic control arms on a signed-out /login boot (n=3 each, production bundle, Chromium 141):
      armuncovered (top rule)uncovered (full-stack rule)white frames
      untouched (control: covered)000/31
      #root emptied + splash removed (control: really blank)34-3634-366/34, min channel 246
      body-level overlay, app hit-testable underneath33-3800/34
      body-level overlay + body{pointer-events:none} (Radix modal shape)38-4238-420/33
      The last row is a fully rendered, fully visible app that both DOM rules call empty.
      What separates them
      The pixel ledger does, and only it. CDP Page.startScreencast at everyNthFrame: 1 with objectui#6378's white rule (no colour channel below 242) fires on the genuinely blank arm (min channel 246 — the bare page background is white) and never on the modal/overlay arms (min channel 0 — the 80%-black overlay).
      Why it matters
      #6569 recorded the false-NEGATIVE direction: this probe cannot fail for a gate that decides after a session exists. This is the false-POSITIVE direction of the same instrument, and it bites exactly where the campaign wants to go next. Any signed-in scenario added to this spec that lands on a surface with an auto-opened dialog — /organizations for a zero-org user is one such surface, and it is the first one anyone tried — reports a multi-hundred-millisecond uncovered window with no defect present. That already happened once: it is the whole content of #6570.
      What is NOT established
      • Whether a cheap DOM-only discriminator exists at all. Geometry plus rendered-text on #root would separate these cases in the samples above, but it was not built or exercised, and it has not been shown to stay red on the genuinely blank arm.
      • Whether any other body-level portal in this codebase (toasts, popovers, tooltips, command palette) produces the same reading. Only the Radix dialog shape was measured.
      • Any rate for the false positive across surfaces. One surface, one fixture.
      Measurement detail, the control-arm table and the 20-boot distribution are on #6570.
      Generated by Claude Code
      Generated by Claude Code
      Metadata
      Metadata
      Assignees
      Labels
      domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
      Type
      Task
      Projects
      No projects
        Milestone
        No milestone
        Relationships
        None yet
        Development
        No branches or pull requests
        Issue actions
        
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

        Skip to content
        finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport #6578
        Closed
        Task
        #7305
        Closed
        finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport#6578
        Task
        #7305
        Assignees
        yinlianghui
        Labels
        domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
        Description
        @claude
        claude
        bot
        opened on Aug 26, 2026
        Found while establishing step 1 of #6570 (premise check). Recording the measurement; not proposing an implementation.
        The rule
        e2e/console-boot-indicator.spec.ts (Console boot continuity) defines coverage as:
        constel=document.elementFromPoint(cx,cy);constok=!!el&&!!(el.closest('#root')||el.closest('#boot-splash'));
        That rule reads an open modal dialog as a blank viewport, and it does so on every sample for as long as the modal is open.
        The mechanism, measured
        A Radix Dialog renders DialogOverlay (fixed inset-0 z-50) and DialogContent through DialogPortal, i.e. as body-level siblings of #root. So the centre hit test lands on a div that is outside both #root and #boot-splash — the exact signature the campaign treats as a blank viewport.
        Both obvious repairs fail:
        • Reading the whole hit stack (document.elementsFromPoint) does not help. Radix's DismissableLayer parks pointer-events: none on <body> while a modal is open, and elements with pointer-events: none are skipped by hit testing — so #root and its whole subtree leave the stack entirely. Measured on 20/20 boots of finding(console): /organizations leaves the viewport centre uncovered for ~453ms after the org gate has handed off #6570's fixture: body { pointer-events: none }, #root with 2 child elements, a 1280x720 box and 196 characters of rendered text, and not one element of it anywhere in the hit stack.
        • aria-hidden is not a tell either: #root's aria-hidden read null on every sample.
        Reproduced deliberately with two synthetic control arms on a signed-out /login boot (n=3 each, production bundle, Chromium 141):
        armuncovered (top rule)uncovered (full-stack rule)white frames
        untouched (control: covered)000/31
        #root emptied + splash removed (control: really blank)34-3634-366/34, min channel 246
        body-level overlay, app hit-testable underneath33-3800/34
        body-level overlay + body{pointer-events:none} (Radix modal shape)38-4238-420/33
        The last row is a fully rendered, fully visible app that both DOM rules call empty.
        What separates them
        The pixel ledger does, and only it. CDP Page.startScreencast at everyNthFrame: 1 with objectui#6378's white rule (no colour channel below 242) fires on the genuinely blank arm (min channel 246 — the bare page background is white) and never on the modal/overlay arms (min channel 0 — the 80%-black overlay).
        Why it matters
        #6569 recorded the false-NEGATIVE direction: this probe cannot fail for a gate that decides after a session exists. This is the false-POSITIVE direction of the same instrument, and it bites exactly where the campaign wants to go next. Any signed-in scenario added to this spec that lands on a surface with an auto-opened dialog — /organizations for a zero-org user is one such surface, and it is the first one anyone tried — reports a multi-hundred-millisecond uncovered window with no defect present. That already happened once: it is the whole content of #6570.
        What is NOT established
        • Whether a cheap DOM-only discriminator exists at all. Geometry plus rendered-text on #root would separate these cases in the samples above, but it was not built or exercised, and it has not been shown to stay red on the genuinely blank arm.
        • Whether any other body-level portal in this codebase (toasts, popovers, tooltips, command palette) produces the same reading. Only the Radix dialog shape was measured.
        • Any rate for the false positive across surfaces. One surface, one fixture.
        Measurement detail, the control-arm table and the 20-boot distribution are on #6570.
        Generated by Claude Code
        Generated by Claude Code
        Metadata
        Metadata
        Assignees
        Labels
        domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
        Type
        Task
        Projects
        No projects
          Milestone
          No milestone
          Relationships
          None yet
          Development
          No branches or pull requests
          Issue actions
          
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

          Skip to content
          finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport #6578
          Closed
          Task
          #7305
          Closed
          finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport#6578
          Task
          #7305
          Assignees
          yinlianghui
          Labels
          domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
          Description
          @claude
          claude
          bot
          opened on Aug 26, 2026
          Found while establishing step 1 of #6570 (premise check). Recording the measurement; not proposing an implementation.
          The rule
          e2e/console-boot-indicator.spec.ts (Console boot continuity) defines coverage as:
          constel=document.elementFromPoint(cx,cy);constok=!!el&&!!(el.closest('#root')||el.closest('#boot-splash'));
          That rule reads an open modal dialog as a blank viewport, and it does so on every sample for as long as the modal is open.
          The mechanism, measured
          A Radix Dialog renders DialogOverlay (fixed inset-0 z-50) and DialogContent through DialogPortal, i.e. as body-level siblings of #root. So the centre hit test lands on a div that is outside both #root and #boot-splash — the exact signature the campaign treats as a blank viewport.
          Both obvious repairs fail:
          • Reading the whole hit stack (document.elementsFromPoint) does not help. Radix's DismissableLayer parks pointer-events: none on <body> while a modal is open, and elements with pointer-events: none are skipped by hit testing — so #root and its whole subtree leave the stack entirely. Measured on 20/20 boots of finding(console): /organizations leaves the viewport centre uncovered for ~453ms after the org gate has handed off #6570's fixture: body { pointer-events: none }, #root with 2 child elements, a 1280x720 box and 196 characters of rendered text, and not one element of it anywhere in the hit stack.
          • aria-hidden is not a tell either: #root's aria-hidden read null on every sample.
          Reproduced deliberately with two synthetic control arms on a signed-out /login boot (n=3 each, production bundle, Chromium 141):
          armuncovered (top rule)uncovered (full-stack rule)white frames
          untouched (control: covered)000/31
          #root emptied + splash removed (control: really blank)34-3634-366/34, min channel 246
          body-level overlay, app hit-testable underneath33-3800/34
          body-level overlay + body{pointer-events:none} (Radix modal shape)38-4238-420/33
          The last row is a fully rendered, fully visible app that both DOM rules call empty.
          What separates them
          The pixel ledger does, and only it. CDP Page.startScreencast at everyNthFrame: 1 with objectui#6378's white rule (no colour channel below 242) fires on the genuinely blank arm (min channel 246 — the bare page background is white) and never on the modal/overlay arms (min channel 0 — the 80%-black overlay).
          Why it matters
          #6569 recorded the false-NEGATIVE direction: this probe cannot fail for a gate that decides after a session exists. This is the false-POSITIVE direction of the same instrument, and it bites exactly where the campaign wants to go next. Any signed-in scenario added to this spec that lands on a surface with an auto-opened dialog — /organizations for a zero-org user is one such surface, and it is the first one anyone tried — reports a multi-hundred-millisecond uncovered window with no defect present. That already happened once: it is the whole content of #6570.
          What is NOT established
          • Whether a cheap DOM-only discriminator exists at all. Geometry plus rendered-text on #root would separate these cases in the samples above, but it was not built or exercised, and it has not been shown to stay red on the genuinely blank arm.
          • Whether any other body-level portal in this codebase (toasts, popovers, tooltips, command palette) produces the same reading. Only the Radix dialog shape was measured.
          • Any rate for the false positive across surfaces. One surface, one fixture.
          Measurement detail, the control-arm table and the 20-boot distribution are on #6570.
          Generated by Claude Code
          Generated by Claude Code
          Metadata
          Metadata
          Assignees
          Labels
          domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
          Type
          Task
          Projects
          No projects
            Milestone
            No milestone
            Relationships
            None yet
            Development
            No branches or pull requests
            Issue actions
            
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

            Skip to content
            finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport #6578
            Closed
            Task
            #7305
            Closed
            finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport#6578
            Task
            #7305
            Assignees
            yinlianghui
            Labels
            domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
            Description
            @claude
            claude
            bot
            opened on Aug 26, 2026
            Found while establishing step 1 of #6570 (premise check). Recording the measurement; not proposing an implementation.
            The rule
            e2e/console-boot-indicator.spec.ts (Console boot continuity) defines coverage as:
            constel=document.elementFromPoint(cx,cy);constok=!!el&&!!(el.closest('#root')||el.closest('#boot-splash'));
            That rule reads an open modal dialog as a blank viewport, and it does so on every sample for as long as the modal is open.
            The mechanism, measured
            A Radix Dialog renders DialogOverlay (fixed inset-0 z-50) and DialogContent through DialogPortal, i.e. as body-level siblings of #root. So the centre hit test lands on a div that is outside both #root and #boot-splash — the exact signature the campaign treats as a blank viewport.
            Both obvious repairs fail:
            • Reading the whole hit stack (document.elementsFromPoint) does not help. Radix's DismissableLayer parks pointer-events: none on <body> while a modal is open, and elements with pointer-events: none are skipped by hit testing — so #root and its whole subtree leave the stack entirely. Measured on 20/20 boots of finding(console): /organizations leaves the viewport centre uncovered for ~453ms after the org gate has handed off #6570's fixture: body { pointer-events: none }, #root with 2 child elements, a 1280x720 box and 196 characters of rendered text, and not one element of it anywhere in the hit stack.
            • aria-hidden is not a tell either: #root's aria-hidden read null on every sample.
            Reproduced deliberately with two synthetic control arms on a signed-out /login boot (n=3 each, production bundle, Chromium 141):
            armuncovered (top rule)uncovered (full-stack rule)white frames
            untouched (control: covered)000/31
            #root emptied + splash removed (control: really blank)34-3634-366/34, min channel 246
            body-level overlay, app hit-testable underneath33-3800/34
            body-level overlay + body{pointer-events:none} (Radix modal shape)38-4238-420/33
            The last row is a fully rendered, fully visible app that both DOM rules call empty.
            What separates them
            The pixel ledger does, and only it. CDP Page.startScreencast at everyNthFrame: 1 with objectui#6378's white rule (no colour channel below 242) fires on the genuinely blank arm (min channel 246 — the bare page background is white) and never on the modal/overlay arms (min channel 0 — the 80%-black overlay).
            Why it matters
            #6569 recorded the false-NEGATIVE direction: this probe cannot fail for a gate that decides after a session exists. This is the false-POSITIVE direction of the same instrument, and it bites exactly where the campaign wants to go next. Any signed-in scenario added to this spec that lands on a surface with an auto-opened dialog — /organizations for a zero-org user is one such surface, and it is the first one anyone tried — reports a multi-hundred-millisecond uncovered window with no defect present. That already happened once: it is the whole content of #6570.
            What is NOT established
            • Whether a cheap DOM-only discriminator exists at all. Geometry plus rendered-text on #root would separate these cases in the samples above, but it was not built or exercised, and it has not been shown to stay red on the genuinely blank arm.
            • Whether any other body-level portal in this codebase (toasts, popovers, tooltips, command palette) produces the same reading. Only the Radix dialog shape was measured.
            • Any rate for the false positive across surfaces. One surface, one fixture.
            Measurement detail, the control-arm table and the 20-boot distribution are on #6570.
            Generated by Claude Code
            Generated by Claude Code
            Metadata
            Metadata
            Assignees
            Labels
            domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
            Type
            Task
            Projects
            No projects
              Milestone
              No milestone
              Relationships
              None yet
              Development
              No branches or pull requests
              Issue actions
              
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport #6578
              Closed
              Task
              #7305
              Closed
              finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport#6578
              Task
              #7305
              Assignees
              yinlianghui
              Labels
              domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
              Description
              @claude
              claude
              bot
              opened on Aug 26, 2026
              Found while establishing step 1 of #6570 (premise check). Recording the measurement; not proposing an implementation.
              The rule
              e2e/console-boot-indicator.spec.ts (Console boot continuity) defines coverage as:
              constel=document.elementFromPoint(cx,cy);constok=!!el&&!!(el.closest('#root')||el.closest('#boot-splash'));
              That rule reads an open modal dialog as a blank viewport, and it does so on every sample for as long as the modal is open.
              The mechanism, measured
              A Radix Dialog renders DialogOverlay (fixed inset-0 z-50) and DialogContent through DialogPortal, i.e. as body-level siblings of #root. So the centre hit test lands on a div that is outside both #root and #boot-splash — the exact signature the campaign treats as a blank viewport.
              Both obvious repairs fail:
              • Reading the whole hit stack (document.elementsFromPoint) does not help. Radix's DismissableLayer parks pointer-events: none on <body> while a modal is open, and elements with pointer-events: none are skipped by hit testing — so #root and its whole subtree leave the stack entirely. Measured on 20/20 boots of finding(console): /organizations leaves the viewport centre uncovered for ~453ms after the org gate has handed off #6570's fixture: body { pointer-events: none }, #root with 2 child elements, a 1280x720 box and 196 characters of rendered text, and not one element of it anywhere in the hit stack.
              • aria-hidden is not a tell either: #root's aria-hidden read null on every sample.
              Reproduced deliberately with two synthetic control arms on a signed-out /login boot (n=3 each, production bundle, Chromium 141):
              armuncovered (top rule)uncovered (full-stack rule)white frames
              untouched (control: covered)000/31
              #root emptied + splash removed (control: really blank)34-3634-366/34, min channel 246
              body-level overlay, app hit-testable underneath33-3800/34
              body-level overlay + body{pointer-events:none} (Radix modal shape)38-4238-420/33
              The last row is a fully rendered, fully visible app that both DOM rules call empty.
              What separates them
              The pixel ledger does, and only it. CDP Page.startScreencast at everyNthFrame: 1 with objectui#6378's white rule (no colour channel below 242) fires on the genuinely blank arm (min channel 246 — the bare page background is white) and never on the modal/overlay arms (min channel 0 — the 80%-black overlay).
              Why it matters
              #6569 recorded the false-NEGATIVE direction: this probe cannot fail for a gate that decides after a session exists. This is the false-POSITIVE direction of the same instrument, and it bites exactly where the campaign wants to go next. Any signed-in scenario added to this spec that lands on a surface with an auto-opened dialog — /organizations for a zero-org user is one such surface, and it is the first one anyone tried — reports a multi-hundred-millisecond uncovered window with no defect present. That already happened once: it is the whole content of #6570.
              What is NOT established
              • Whether a cheap DOM-only discriminator exists at all. Geometry plus rendered-text on #root would separate these cases in the samples above, but it was not built or exercised, and it has not been shown to stay red on the genuinely blank arm.
              • Whether any other body-level portal in this codebase (toasts, popovers, tooltips, command palette) produces the same reading. Only the Radix dialog shape was measured.
              • Any rate for the false positive across surfaces. One surface, one fixture.
              Measurement detail, the control-arm table and the 20-boot distribution are on #6570.
              Generated by Claude Code
              Generated by Claude Code
              Metadata
              Metadata
              Assignees
              Labels
              domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
              Type
              Task
              Projects
              No projects
                Milestone
                No milestone
                Relationships
                None yet
                Development
                No branches or pull requests
                Issue actions
                
, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

                Skip to content
                finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport #6578
                Closed
                Task
                #7305
                Closed
                finding(e2e): the boot-continuity coverage rule reads an open modal as a blank viewport#6578
                Task
                #7305
                Assignees
                yinlianghui
                Labels
                domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
                Description
                @claude
                claude
                bot
                opened on Aug 26, 2026
                Found while establishing step 1 of #6570 (premise check). Recording the measurement; not proposing an implementation.
                The rule
                e2e/console-boot-indicator.spec.ts (Console boot continuity) defines coverage as:
                constel=document.elementFromPoint(cx,cy);constok=!!el&&!!(el.closest('#root')||el.closest('#boot-splash'));
                That rule reads an open modal dialog as a blank viewport, and it does so on every sample for as long as the modal is open.
                The mechanism, measured
                A Radix Dialog renders DialogOverlay (fixed inset-0 z-50) and DialogContent through DialogPortal, i.e. as body-level siblings of #root. So the centre hit test lands on a div that is outside both #root and #boot-splash — the exact signature the campaign treats as a blank viewport.
                Both obvious repairs fail:
                • Reading the whole hit stack (document.elementsFromPoint) does not help. Radix's DismissableLayer parks pointer-events: none on <body> while a modal is open, and elements with pointer-events: none are skipped by hit testing — so #root and its whole subtree leave the stack entirely. Measured on 20/20 boots of finding(console): /organizations leaves the viewport centre uncovered for ~453ms after the org gate has handed off #6570's fixture: body { pointer-events: none }, #root with 2 child elements, a 1280x720 box and 196 characters of rendered text, and not one element of it anywhere in the hit stack.
                • aria-hidden is not a tell either: #root's aria-hidden read null on every sample.
                Reproduced deliberately with two synthetic control arms on a signed-out /login boot (n=3 each, production bundle, Chromium 141):
                armuncovered (top rule)uncovered (full-stack rule)white frames
                untouched (control: covered)000/31
                #root emptied + splash removed (control: really blank)34-3634-366/34, min channel 246
                body-level overlay, app hit-testable underneath33-3800/34
                body-level overlay + body{pointer-events:none} (Radix modal shape)38-4238-420/33
                The last row is a fully rendered, fully visible app that both DOM rules call empty.
                What separates them
                The pixel ledger does, and only it. CDP Page.startScreencast at everyNthFrame: 1 with objectui#6378's white rule (no colour channel below 242) fires on the genuinely blank arm (min channel 246 — the bare page background is white) and never on the modal/overlay arms (min channel 0 — the 80%-black overlay).
                Why it matters
                #6569 recorded the false-NEGATIVE direction: this probe cannot fail for a gate that decides after a session exists. This is the false-POSITIVE direction of the same instrument, and it bites exactly where the campaign wants to go next. Any signed-in scenario added to this spec that lands on a surface with an auto-opened dialog — /organizations for a zero-org user is one such surface, and it is the first one anyone tried — reports a multi-hundred-millisecond uncovered window with no defect present. That already happened once: it is the whole content of #6570.
                What is NOT established
                • Whether a cheap DOM-only discriminator exists at all. Geometry plus rendered-text on #root would separate these cases in the samples above, but it was not built or exercised, and it has not been shown to stay red on the genuinely blank arm.
                • Whether any other body-level portal in this codebase (toasts, popovers, tooltips, command palette) produces the same reading. Only the Radix dialog shape was measured.
                • Any rate for the false positive across surfaces. One surface, one fixture.
                Measurement detail, the control-arm table and the 20-boot distribution are on #6570.
                Generated by Claude Code
                Generated by Claude Code
                Metadata
                Metadata
                Assignees
                Labels
                domain:devxobjectui devx stream: fix lands on .github/, scripts/ or release pipeline — devx lane cross-repo
                Type
                Task
                Projects
                No projects
                  Milestone
                  No milestone
                  Relationships
                  None yet
                  Development
                  No branches or pull requests
                  Issue actions