Only the running camera can preview — is framing with the ultra-wide worth a lens switch? #115

Description

@liversedge

From PinPointStudio's preview handover, 28 August 2026, §4.6 — filed as their words have it: "a product question, not a bug". It needs a decision before it needs code.

What the device can actually do

This handset has one AVCaptureSession. CORE 5.6d gives each lens its own Source, and PinPointStudio asks about every camera Source at declare — but only one of them can be previewing at any moment, because only one camera is running.

Until 2f604b1, AppModel.livePreview was a single slot and the second request stopped the first. src:camera:wide is asked for first, so wide — the lens an operator actually watches — was destroyed milliseconds after being created, and both Sources were acked opened. A Source that is not the running camera is now refused with a reason, which is legitimate under E18 clause 1c and which Studio handles.

The lens is never switched to satisfy a preview request.Lens.captureRank makes a lens change calibration-affecting, and changing it mid-session is currently forbidden.

The question

If an operator wants to frame with the ultra-wide, the only way to show it to them is to switch the active lens — which is calibration-affecting.

  • Leave it as it is. Preview follows the capture lens. Framing on a different lens is not offered, and the host's request is refused with a reason. Costs nothing; an operator who wants the ultra-wide's field of view cannot see it before committing to it.
  • Allow a lens switch for framing, before arming only. Preview follows whichever lens is asked for while the session is unarmed; arming pins it and any calibration is re-taken or invalidated. Needs a rule for what happens to calibration, and a reason it cannot happen mid-session.
  • Something narrower — e.g. the host may name a preferred preview Source at declare, chosen once, before anything is calibrated.

⚠ Whichever it is, 5.6d still lets Studio ask about every Source, so the refusal path stays regardless. This decides only whether a request can ever cause a switch.

Exit criterion

An answer recorded here, and if it is anything but the first option, an issue against E3 with the calibration rule written down.

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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

      Only the running camera can preview — is framing with the ultra-wide worth a lens switch? #115

      Description

      @liversedge

      From PinPointStudio's preview handover, 28 August 2026, §4.6 — filed as their words have it: "a product question, not a bug". It needs a decision before it needs code.

      What the device can actually do

      This handset has one AVCaptureSession. CORE 5.6d gives each lens its own Source, and PinPointStudio asks about every camera Source at declare — but only one of them can be previewing at any moment, because only one camera is running.

      Until 2f604b1, AppModel.livePreview was a single slot and the second request stopped the first. src:camera:wide is asked for first, so wide — the lens an operator actually watches — was destroyed milliseconds after being created, and both Sources were acked opened. A Source that is not the running camera is now refused with a reason, which is legitimate under E18 clause 1c and which Studio handles.

      The lens is never switched to satisfy a preview request.Lens.captureRank makes a lens change calibration-affecting, and changing it mid-session is currently forbidden.

      The question

      If an operator wants to frame with the ultra-wide, the only way to show it to them is to switch the active lens — which is calibration-affecting.

      • Leave it as it is. Preview follows the capture lens. Framing on a different lens is not offered, and the host's request is refused with a reason. Costs nothing; an operator who wants the ultra-wide's field of view cannot see it before committing to it.
      • Allow a lens switch for framing, before arming only. Preview follows whichever lens is asked for while the session is unarmed; arming pins it and any calibration is re-taken or invalidated. Needs a rule for what happens to calibration, and a reason it cannot happen mid-session.
      • Something narrower — e.g. the host may name a preferred preview Source at declare, chosen once, before anything is calibrated.

      ⚠ Whichever it is, 5.6d still lets Studio ask about every Source, so the refusal path stays regardless. This decides only whether a request can ever cause a switch.

      Exit criterion

      An answer recorded here, and if it is anything but the first option, an issue against E3 with the calibration rule written down.

      Activity

      Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

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          , '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

          Only the running camera can preview — is framing with the ultra-wide worth a lens switch? #115

          Description

          @liversedge

          From PinPointStudio's preview handover, 28 August 2026, §4.6 — filed as their words have it: "a product question, not a bug". It needs a decision before it needs code.

          What the device can actually do

          This handset has one AVCaptureSession. CORE 5.6d gives each lens its own Source, and PinPointStudio asks about every camera Source at declare — but only one of them can be previewing at any moment, because only one camera is running.

          Until 2f604b1, AppModel.livePreview was a single slot and the second request stopped the first. src:camera:wide is asked for first, so wide — the lens an operator actually watches — was destroyed milliseconds after being created, and both Sources were acked opened. A Source that is not the running camera is now refused with a reason, which is legitimate under E18 clause 1c and which Studio handles.

          The lens is never switched to satisfy a preview request.Lens.captureRank makes a lens change calibration-affecting, and changing it mid-session is currently forbidden.

          The question

          If an operator wants to frame with the ultra-wide, the only way to show it to them is to switch the active lens — which is calibration-affecting.

          • Leave it as it is. Preview follows the capture lens. Framing on a different lens is not offered, and the host's request is refused with a reason. Costs nothing; an operator who wants the ultra-wide's field of view cannot see it before committing to it.
          • Allow a lens switch for framing, before arming only. Preview follows whichever lens is asked for while the session is unarmed; arming pins it and any calibration is re-taken or invalidated. Needs a rule for what happens to calibration, and a reason it cannot happen mid-session.
          • Something narrower — e.g. the host may name a preferred preview Source at declare, chosen once, before anything is calibrated.

          ⚠ Whichever it is, 5.6d still lets Studio ask about every Source, so the refusal path stays regardless. This decides only whether a request can ever cause a switch.

          Exit criterion

          An answer recorded here, and if it is anything but the first option, an issue against E3 with the calibration rule written down.

          Activity

          Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

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              , '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

              Only the running camera can preview — is framing with the ultra-wide worth a lens switch? #115

              Description

              @liversedge

              From PinPointStudio's preview handover, 28 August 2026, §4.6 — filed as their words have it: "a product question, not a bug". It needs a decision before it needs code.

              What the device can actually do

              This handset has one AVCaptureSession. CORE 5.6d gives each lens its own Source, and PinPointStudio asks about every camera Source at declare — but only one of them can be previewing at any moment, because only one camera is running.

              Until 2f604b1, AppModel.livePreview was a single slot and the second request stopped the first. src:camera:wide is asked for first, so wide — the lens an operator actually watches — was destroyed milliseconds after being created, and both Sources were acked opened. A Source that is not the running camera is now refused with a reason, which is legitimate under E18 clause 1c and which Studio handles.

              The lens is never switched to satisfy a preview request.Lens.captureRank makes a lens change calibration-affecting, and changing it mid-session is currently forbidden.

              The question

              If an operator wants to frame with the ultra-wide, the only way to show it to them is to switch the active lens — which is calibration-affecting.

              • Leave it as it is. Preview follows the capture lens. Framing on a different lens is not offered, and the host's request is refused with a reason. Costs nothing; an operator who wants the ultra-wide's field of view cannot see it before committing to it.
              • Allow a lens switch for framing, before arming only. Preview follows whichever lens is asked for while the session is unarmed; arming pins it and any calibration is re-taken or invalidated. Needs a rule for what happens to calibration, and a reason it cannot happen mid-session.
              • Something narrower — e.g. the host may name a preferred preview Source at declare, chosen once, before anything is calibrated.

              ⚠ Whichever it is, 5.6d still lets Studio ask about every Source, so the refusal path stays regardless. This decides only whether a request can ever cause a switch.

              Exit criterion

              An answer recorded here, and if it is anything but the first option, an issue against E3 with the calibration rule written down.

              Activity

              Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

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                  , '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

                  Only the running camera can preview — is framing with the ultra-wide worth a lens switch? #115

                  Description

                  @liversedge

                  From PinPointStudio's preview handover, 28 August 2026, §4.6 — filed as their words have it: "a product question, not a bug". It needs a decision before it needs code.

                  What the device can actually do

                  This handset has one AVCaptureSession. CORE 5.6d gives each lens its own Source, and PinPointStudio asks about every camera Source at declare — but only one of them can be previewing at any moment, because only one camera is running.

                  Until 2f604b1, AppModel.livePreview was a single slot and the second request stopped the first. src:camera:wide is asked for first, so wide — the lens an operator actually watches — was destroyed milliseconds after being created, and both Sources were acked opened. A Source that is not the running camera is now refused with a reason, which is legitimate under E18 clause 1c and which Studio handles.

                  The lens is never switched to satisfy a preview request.Lens.captureRank makes a lens change calibration-affecting, and changing it mid-session is currently forbidden.

                  The question

                  If an operator wants to frame with the ultra-wide, the only way to show it to them is to switch the active lens — which is calibration-affecting.

                  • Leave it as it is. Preview follows the capture lens. Framing on a different lens is not offered, and the host's request is refused with a reason. Costs nothing; an operator who wants the ultra-wide's field of view cannot see it before committing to it.
                  • Allow a lens switch for framing, before arming only. Preview follows whichever lens is asked for while the session is unarmed; arming pins it and any calibration is re-taken or invalidated. Needs a rule for what happens to calibration, and a reason it cannot happen mid-session.
                  • Something narrower — e.g. the host may name a preferred preview Source at declare, chosen once, before anything is calibrated.

                  ⚠ Whichever it is, 5.6d still lets Studio ask about every Source, so the refusal path stays regardless. This decides only whether a request can ever cause a switch.

                  Exit criterion

                  An answer recorded here, and if it is anything but the first option, an issue against E3 with the calibration rule written down.

                  Activity

                  Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

                  Metadata

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                  No one assigned

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                      , '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

                      Only the running camera can preview — is framing with the ultra-wide worth a lens switch? #115

                      Description

                      @liversedge

                      From PinPointStudio's preview handover, 28 August 2026, §4.6 — filed as their words have it: "a product question, not a bug". It needs a decision before it needs code.

                      What the device can actually do

                      This handset has one AVCaptureSession. CORE 5.6d gives each lens its own Source, and PinPointStudio asks about every camera Source at declare — but only one of them can be previewing at any moment, because only one camera is running.

                      Until 2f604b1, AppModel.livePreview was a single slot and the second request stopped the first. src:camera:wide is asked for first, so wide — the lens an operator actually watches — was destroyed milliseconds after being created, and both Sources were acked opened. A Source that is not the running camera is now refused with a reason, which is legitimate under E18 clause 1c and which Studio handles.

                      The lens is never switched to satisfy a preview request.Lens.captureRank makes a lens change calibration-affecting, and changing it mid-session is currently forbidden.

                      The question

                      If an operator wants to frame with the ultra-wide, the only way to show it to them is to switch the active lens — which is calibration-affecting.

                      • Leave it as it is. Preview follows the capture lens. Framing on a different lens is not offered, and the host's request is refused with a reason. Costs nothing; an operator who wants the ultra-wide's field of view cannot see it before committing to it.
                      • Allow a lens switch for framing, before arming only. Preview follows whichever lens is asked for while the session is unarmed; arming pins it and any calibration is re-taken or invalidated. Needs a rule for what happens to calibration, and a reason it cannot happen mid-session.
                      • Something narrower — e.g. the host may name a preferred preview Source at declare, chosen once, before anything is calibrated.

                      ⚠ Whichever it is, 5.6d still lets Studio ask about every Source, so the refusal path stays regardless. This decides only whether a request can ever cause a switch.

                      Exit criterion

                      An answer recorded here, and if it is anything but the first option, an issue against E3 with the calibration rule written down.

                      Activity

                      Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

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                          , '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

                          Only the running camera can preview — is framing with the ultra-wide worth a lens switch? #115

                          Description

                          @liversedge

                          From PinPointStudio's preview handover, 28 August 2026, §4.6 — filed as their words have it: "a product question, not a bug". It needs a decision before it needs code.

                          What the device can actually do

                          This handset has one AVCaptureSession. CORE 5.6d gives each lens its own Source, and PinPointStudio asks about every camera Source at declare — but only one of them can be previewing at any moment, because only one camera is running.

                          Until 2f604b1, AppModel.livePreview was a single slot and the second request stopped the first. src:camera:wide is asked for first, so wide — the lens an operator actually watches — was destroyed milliseconds after being created, and both Sources were acked opened. A Source that is not the running camera is now refused with a reason, which is legitimate under E18 clause 1c and which Studio handles.

                          The lens is never switched to satisfy a preview request.Lens.captureRank makes a lens change calibration-affecting, and changing it mid-session is currently forbidden.

                          The question

                          If an operator wants to frame with the ultra-wide, the only way to show it to them is to switch the active lens — which is calibration-affecting.

                          • Leave it as it is. Preview follows the capture lens. Framing on a different lens is not offered, and the host's request is refused with a reason. Costs nothing; an operator who wants the ultra-wide's field of view cannot see it before committing to it.
                          • Allow a lens switch for framing, before arming only. Preview follows whichever lens is asked for while the session is unarmed; arming pins it and any calibration is re-taken or invalidated. Needs a rule for what happens to calibration, and a reason it cannot happen mid-session.
                          • Something narrower — e.g. the host may name a preferred preview Source at declare, chosen once, before anything is calibrated.

                          ⚠ Whichever it is, 5.6d still lets Studio ask about every Source, so the refusal path stays regardless. This decides only whether a request can ever cause a switch.

                          Exit criterion

                          An answer recorded here, and if it is anything but the first option, an issue against E3 with the calibration rule written down.

                          Activity

                          Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

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                          No one assigned

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                              Only the running camera can preview — is framing with the ultra-wide worth a lens switch? #115

                              Description

                              @liversedge

                              From PinPointStudio's preview handover, 28 August 2026, §4.6 — filed as their words have it: "a product question, not a bug". It needs a decision before it needs code.

                              What the device can actually do

                              This handset has one AVCaptureSession. CORE 5.6d gives each lens its own Source, and PinPointStudio asks about every camera Source at declare — but only one of them can be previewing at any moment, because only one camera is running.

                              Until 2f604b1, AppModel.livePreview was a single slot and the second request stopped the first. src:camera:wide is asked for first, so wide — the lens an operator actually watches — was destroyed milliseconds after being created, and both Sources were acked opened. A Source that is not the running camera is now refused with a reason, which is legitimate under E18 clause 1c and which Studio handles.

                              The lens is never switched to satisfy a preview request.Lens.captureRank makes a lens change calibration-affecting, and changing it mid-session is currently forbidden.

                              The question

                              If an operator wants to frame with the ultra-wide, the only way to show it to them is to switch the active lens — which is calibration-affecting.

                              • Leave it as it is. Preview follows the capture lens. Framing on a different lens is not offered, and the host's request is refused with a reason. Costs nothing; an operator who wants the ultra-wide's field of view cannot see it before committing to it.
                              • Allow a lens switch for framing, before arming only. Preview follows whichever lens is asked for while the session is unarmed; arming pins it and any calibration is re-taken or invalidated. Needs a rule for what happens to calibration, and a reason it cannot happen mid-session.
                              • Something narrower — e.g. the host may name a preferred preview Source at declare, chosen once, before anything is calibrated.

                              ⚠ Whichever it is, 5.6d still lets Studio ask about every Source, so the refusal path stays regardless. This decides only whether a request can ever cause a switch.

                              Exit criterion

                              An answer recorded here, and if it is anything but the first option, an issue against E3 with the calibration rule written down.

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