fix(codex): restore collaborative browser handoff - #436

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t3code/diagnose-browser-collaboration
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fix(codex): restore collaborative browser handoff#436
patroza wants to merge 2 commits into
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t3code/diagnose-browser-collaboration

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@patroza

@patrozapatroza commented Sep 1, 2026•
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Summary

  • teach Codex Code Mode to discover deferred T3 preview tools through ALL_TOOLS
  • require a requested floating preview to be visibly attached before preview_open reports success
  • cover deferred discovery in both collaboration modes and the preview presentation readiness rule

Root cause

Two independent gaps compounded. Codex 5.6 Code Mode currently omits the normal deferred tool_search primitive even though T3 preview tools remain callable through ALL_TOOLS, and T3 did not document that fallback. After discovery, T3 could create a desktop webview and return its tab metadata while visible remained false because readiness only checked the automation bridge. Claude Code is unaffected by the discovery gap because its MCP tools are exposed normally.

The captured turn demonstrated the second gap directly: preview_open returned tab_1, the iCloud URL and title, and visible: false; subsequent snapshot and evaluate operations failed. The agent therefore knew the backing tab existed, but no browser surface had attached to the thread.

Validation

  • vp test run apps/server/src/provider/Layers/CodexSessionRuntime.test.ts (39 passed)
  • vp test run apps/web/src/components/preview/previewAutomationOpenReadiness.test.ts (10 passed)
  • full agent ship gate passed on the first published commit; the follow-up push will rerun it

@github-actions
fix(codex): discover deferred preview tools
3e4d044
Codex 5.6 Code Mode can defer MCP tools without exposing tool_search, leaving them reachable only through ALL_TOOLS. Teach T3's Codex instructions to use that fallback before declaring browser collaboration unavailable.
Model: gpt-5.6-sol
Harness: T3 Code Codex
@patroza
patroza marked this pull request as ready for review September 1, 2026 08:26
@github-actions
fix(web): require visible collaborative previews
e2153b3
Do not report preview_open as ready when the requested floating preview has not actually attached to a visible browser surface.
Model: GPT-5.6 Sol\nHarness: Codex via T3 Code
@patrozapatroza changed the title fix(codex): discover deferred preview toolsfix(codex): restore collaborative browser handoffSep 1, 2026
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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
fix(codex): restore collaborative browser handoff - #436
Open
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Open
fix(codex): restore collaborative browser handoff#436
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Conversation
@patroza
@patrozapatroza
commented
Sep 1, 2026•

edited

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Owner
Summary
  • teach Codex Code Mode to discover deferred T3 preview tools through ALL_TOOLS
  • require a requested floating preview to be visibly attached before preview_open reports success
  • cover deferred discovery in both collaboration modes and the preview presentation readiness rule
Root cause
Two independent gaps compounded. Codex 5.6 Code Mode currently omits the normal deferred tool_search primitive even though T3 preview tools remain callable through ALL_TOOLS, and T3 did not document that fallback. After discovery, T3 could create a desktop webview and return its tab metadata while visible remained false because readiness only checked the automation bridge. Claude Code is unaffected by the discovery gap because its MCP tools are exposed normally.
The captured turn demonstrated the second gap directly: preview_open returned tab_1, the iCloud URL and title, and visible: false; subsequent snapshot and evaluate operations failed. The agent therefore knew the backing tab existed, but no browser surface had attached to the thread.
Validation
  • vp test run apps/server/src/provider/Layers/CodexSessionRuntime.test.ts (39 passed)
  • vp test run apps/web/src/components/preview/previewAutomationOpenReadiness.test.ts (10 passed)
  • full agent ship gate passed on the first published commit; the follow-up push will rerun it
@github-actions
fix(codex): discover deferred preview tools
3e4d044
Codex 5.6 Code Mode can defer MCP tools without exposing tool_search, leaving them reachable only through ALL_TOOLS. Teach T3's Codex instructions to use that fallback before declaring browser collaboration unavailable.
Model: gpt-5.6-sol
Harness: T3 Code Codex
@patroza
patroza
marked this pull request as ready for review
September 1, 2026 08:26
@github-actions
fix(web): require visible collaborative previews
e2153b3
Do not report preview_open as ready when the requested floating preview has not actually attached to a visible browser surface.
Model: GPT-5.6 Sol\nHarness: Codex via T3 Code
@patrozapatroza
changed the title
fix(codex): discover deferred preview toolsfix(codex): restore collaborative browser handoffSep 1, 2026
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@patroza

, '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
fix(codex): restore collaborative browser handoff - #436
Open
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Open
fix(codex): restore collaborative browser handoff#436
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Conversation
@patroza
@patrozapatroza
commented
Sep 1, 2026•

edited

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Owner
Summary
  • teach Codex Code Mode to discover deferred T3 preview tools through ALL_TOOLS
  • require a requested floating preview to be visibly attached before preview_open reports success
  • cover deferred discovery in both collaboration modes and the preview presentation readiness rule
Root cause
Two independent gaps compounded. Codex 5.6 Code Mode currently omits the normal deferred tool_search primitive even though T3 preview tools remain callable through ALL_TOOLS, and T3 did not document that fallback. After discovery, T3 could create a desktop webview and return its tab metadata while visible remained false because readiness only checked the automation bridge. Claude Code is unaffected by the discovery gap because its MCP tools are exposed normally.
The captured turn demonstrated the second gap directly: preview_open returned tab_1, the iCloud URL and title, and visible: false; subsequent snapshot and evaluate operations failed. The agent therefore knew the backing tab existed, but no browser surface had attached to the thread.
Validation
  • vp test run apps/server/src/provider/Layers/CodexSessionRuntime.test.ts (39 passed)
  • vp test run apps/web/src/components/preview/previewAutomationOpenReadiness.test.ts (10 passed)
  • full agent ship gate passed on the first published commit; the follow-up push will rerun it
@github-actions
fix(codex): discover deferred preview tools
3e4d044
Codex 5.6 Code Mode can defer MCP tools without exposing tool_search, leaving them reachable only through ALL_TOOLS. Teach T3's Codex instructions to use that fallback before declaring browser collaboration unavailable.
Model: gpt-5.6-sol
Harness: T3 Code Codex
@patroza
patroza
marked this pull request as ready for review
September 1, 2026 08:26
@github-actions
fix(web): require visible collaborative previews
e2153b3
Do not report preview_open as ready when the requested floating preview has not actually attached to a visible browser surface.
Model: GPT-5.6 Sol\nHarness: Codex via T3 Code
@patrozapatroza
changed the title
fix(codex): discover deferred preview toolsfix(codex): restore collaborative browser handoffSep 1, 2026
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@patroza

, '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
fix(codex): restore collaborative browser handoff - #436
Open
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Open
fix(codex): restore collaborative browser handoff#436
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Conversation
@patroza
@patrozapatroza
commented
Sep 1, 2026•

edited

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Owner
Summary
  • teach Codex Code Mode to discover deferred T3 preview tools through ALL_TOOLS
  • require a requested floating preview to be visibly attached before preview_open reports success
  • cover deferred discovery in both collaboration modes and the preview presentation readiness rule
Root cause
Two independent gaps compounded. Codex 5.6 Code Mode currently omits the normal deferred tool_search primitive even though T3 preview tools remain callable through ALL_TOOLS, and T3 did not document that fallback. After discovery, T3 could create a desktop webview and return its tab metadata while visible remained false because readiness only checked the automation bridge. Claude Code is unaffected by the discovery gap because its MCP tools are exposed normally.
The captured turn demonstrated the second gap directly: preview_open returned tab_1, the iCloud URL and title, and visible: false; subsequent snapshot and evaluate operations failed. The agent therefore knew the backing tab existed, but no browser surface had attached to the thread.
Validation
  • vp test run apps/server/src/provider/Layers/CodexSessionRuntime.test.ts (39 passed)
  • vp test run apps/web/src/components/preview/previewAutomationOpenReadiness.test.ts (10 passed)
  • full agent ship gate passed on the first published commit; the follow-up push will rerun it
@github-actions
fix(codex): discover deferred preview tools
3e4d044
Codex 5.6 Code Mode can defer MCP tools without exposing tool_search, leaving them reachable only through ALL_TOOLS. Teach T3's Codex instructions to use that fallback before declaring browser collaboration unavailable.
Model: gpt-5.6-sol
Harness: T3 Code Codex
@patroza
patroza
marked this pull request as ready for review
September 1, 2026 08:26
@github-actions
fix(web): require visible collaborative previews
e2153b3
Do not report preview_open as ready when the requested floating preview has not actually attached to a visible browser surface.
Model: GPT-5.6 Sol\nHarness: Codex via T3 Code
@patrozapatroza
changed the title
fix(codex): discover deferred preview toolsfix(codex): restore collaborative browser handoffSep 1, 2026
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1 participant

@patroza

, '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
fix(codex): restore collaborative browser handoff - #436
Open
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Open
fix(codex): restore collaborative browser handoff#436
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Conversation
@patroza
@patrozapatroza
commented
Sep 1, 2026•

edited

Loading

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Owner
Summary
  • teach Codex Code Mode to discover deferred T3 preview tools through ALL_TOOLS
  • require a requested floating preview to be visibly attached before preview_open reports success
  • cover deferred discovery in both collaboration modes and the preview presentation readiness rule
Root cause
Two independent gaps compounded. Codex 5.6 Code Mode currently omits the normal deferred tool_search primitive even though T3 preview tools remain callable through ALL_TOOLS, and T3 did not document that fallback. After discovery, T3 could create a desktop webview and return its tab metadata while visible remained false because readiness only checked the automation bridge. Claude Code is unaffected by the discovery gap because its MCP tools are exposed normally.
The captured turn demonstrated the second gap directly: preview_open returned tab_1, the iCloud URL and title, and visible: false; subsequent snapshot and evaluate operations failed. The agent therefore knew the backing tab existed, but no browser surface had attached to the thread.
Validation
  • vp test run apps/server/src/provider/Layers/CodexSessionRuntime.test.ts (39 passed)
  • vp test run apps/web/src/components/preview/previewAutomationOpenReadiness.test.ts (10 passed)
  • full agent ship gate passed on the first published commit; the follow-up push will rerun it
@github-actions
fix(codex): discover deferred preview tools
3e4d044
Codex 5.6 Code Mode can defer MCP tools without exposing tool_search, leaving them reachable only through ALL_TOOLS. Teach T3's Codex instructions to use that fallback before declaring browser collaboration unavailable.
Model: gpt-5.6-sol
Harness: T3 Code Codex
@patroza
patroza
marked this pull request as ready for review
September 1, 2026 08:26
@github-actions
fix(web): require visible collaborative previews
e2153b3
Do not report preview_open as ready when the requested floating preview has not actually attached to a visible browser surface.
Model: GPT-5.6 Sol\nHarness: Codex via T3 Code
@patrozapatroza
changed the title
fix(codex): discover deferred preview toolsfix(codex): restore collaborative browser handoffSep 1, 2026
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1 participant

@patroza

, '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
fix(codex): restore collaborative browser handoff - #436
Open
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Open
fix(codex): restore collaborative browser handoff#436
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Conversation
@patroza
@patrozapatroza
commented
Sep 1, 2026•

edited

Loading

Copy link


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Owner
Summary
  • teach Codex Code Mode to discover deferred T3 preview tools through ALL_TOOLS
  • require a requested floating preview to be visibly attached before preview_open reports success
  • cover deferred discovery in both collaboration modes and the preview presentation readiness rule
Root cause
Two independent gaps compounded. Codex 5.6 Code Mode currently omits the normal deferred tool_search primitive even though T3 preview tools remain callable through ALL_TOOLS, and T3 did not document that fallback. After discovery, T3 could create a desktop webview and return its tab metadata while visible remained false because readiness only checked the automation bridge. Claude Code is unaffected by the discovery gap because its MCP tools are exposed normally.
The captured turn demonstrated the second gap directly: preview_open returned tab_1, the iCloud URL and title, and visible: false; subsequent snapshot and evaluate operations failed. The agent therefore knew the backing tab existed, but no browser surface had attached to the thread.
Validation
  • vp test run apps/server/src/provider/Layers/CodexSessionRuntime.test.ts (39 passed)
  • vp test run apps/web/src/components/preview/previewAutomationOpenReadiness.test.ts (10 passed)
  • full agent ship gate passed on the first published commit; the follow-up push will rerun it
@github-actions
fix(codex): discover deferred preview tools
3e4d044
Codex 5.6 Code Mode can defer MCP tools without exposing tool_search, leaving them reachable only through ALL_TOOLS. Teach T3's Codex instructions to use that fallback before declaring browser collaboration unavailable.
Model: gpt-5.6-sol
Harness: T3 Code Codex
@patroza
patroza
marked this pull request as ready for review
September 1, 2026 08:26
@github-actions
fix(web): require visible collaborative previews
e2153b3
Do not report preview_open as ready when the requested floating preview has not actually attached to a visible browser surface.
Model: GPT-5.6 Sol\nHarness: Codex via T3 Code
@patrozapatroza
changed the title
fix(codex): discover deferred preview toolsfix(codex): restore collaborative browser handoffSep 1, 2026
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1 participant

@patroza

, '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
fix(codex): restore collaborative browser handoff - #436
Open
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Open
fix(codex): restore collaborative browser handoff#436
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
Conversation
@patroza
@patrozapatroza
commented
Sep 1, 2026•

edited

Loading

Copy link


Copy Markdown

Owner
Summary
  • teach Codex Code Mode to discover deferred T3 preview tools through ALL_TOOLS
  • require a requested floating preview to be visibly attached before preview_open reports success
  • cover deferred discovery in both collaboration modes and the preview presentation readiness rule
Root cause
Two independent gaps compounded. Codex 5.6 Code Mode currently omits the normal deferred tool_search primitive even though T3 preview tools remain callable through ALL_TOOLS, and T3 did not document that fallback. After discovery, T3 could create a desktop webview and return its tab metadata while visible remained false because readiness only checked the automation bridge. Claude Code is unaffected by the discovery gap because its MCP tools are exposed normally.
The captured turn demonstrated the second gap directly: preview_open returned tab_1, the iCloud URL and title, and visible: false; subsequent snapshot and evaluate operations failed. The agent therefore knew the backing tab existed, but no browser surface had attached to the thread.
Validation
  • vp test run apps/server/src/provider/Layers/CodexSessionRuntime.test.ts (39 passed)
  • vp test run apps/web/src/components/preview/previewAutomationOpenReadiness.test.ts (10 passed)
  • full agent ship gate passed on the first published commit; the follow-up push will rerun it
@github-actions
fix(codex): discover deferred preview tools
3e4d044
Codex 5.6 Code Mode can defer MCP tools without exposing tool_search, leaving them reachable only through ALL_TOOLS. Teach T3's Codex instructions to use that fallback before declaring browser collaboration unavailable.
Model: gpt-5.6-sol
Harness: T3 Code Codex
@patroza
patroza
marked this pull request as ready for review
September 1, 2026 08:26
@github-actions
fix(web): require visible collaborative previews
e2153b3
Do not report preview_open as ready when the requested floating preview has not actually attached to a visible browser surface.
Model: GPT-5.6 Sol\nHarness: Codex via T3 Code
@patrozapatroza
changed the title
fix(codex): discover deferred preview toolsfix(codex): restore collaborative browser handoffSep 1, 2026
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, '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); }
})();
})();

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fix(codex): restore collaborative browser handoff - #436
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patroza wants to merge 2 commits into
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t3code/diagnose-browser-collaboration
Open
fix(codex): restore collaborative browser handoff#436
patroza wants to merge 2 commits into
fork/devfrom 
t3code/diagnose-browser-collaboration
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@patroza
@patrozapatroza
commented
Sep 1, 2026•

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Summary
  • teach Codex Code Mode to discover deferred T3 preview tools through ALL_TOOLS
  • require a requested floating preview to be visibly attached before preview_open reports success
  • cover deferred discovery in both collaboration modes and the preview presentation readiness rule
Root cause
Two independent gaps compounded. Codex 5.6 Code Mode currently omits the normal deferred tool_search primitive even though T3 preview tools remain callable through ALL_TOOLS, and T3 did not document that fallback. After discovery, T3 could create a desktop webview and return its tab metadata while visible remained false because readiness only checked the automation bridge. Claude Code is unaffected by the discovery gap because its MCP tools are exposed normally.
The captured turn demonstrated the second gap directly: preview_open returned tab_1, the iCloud URL and title, and visible: false; subsequent snapshot and evaluate operations failed. The agent therefore knew the backing tab existed, but no browser surface had attached to the thread.
Validation
  • vp test run apps/server/src/provider/Layers/CodexSessionRuntime.test.ts (39 passed)
  • vp test run apps/web/src/components/preview/previewAutomationOpenReadiness.test.ts (10 passed)
  • full agent ship gate passed on the first published commit; the follow-up push will rerun it
@github-actions
fix(codex): discover deferred preview tools
3e4d044
Codex 5.6 Code Mode can defer MCP tools without exposing tool_search, leaving them reachable only through ALL_TOOLS. Teach T3's Codex instructions to use that fallback before declaring browser collaboration unavailable.
Model: gpt-5.6-sol
Harness: T3 Code Codex
@patroza
patroza
marked this pull request as ready for review
September 1, 2026 08:26
@github-actions
fix(web): require visible collaborative previews
e2153b3
Do not report preview_open as ready when the requested floating preview has not actually attached to a visible browser surface.
Model: GPT-5.6 Sol\nHarness: Codex via T3 Code
@patrozapatroza
changed the title
fix(codex): discover deferred preview toolsfix(codex): restore collaborative browser handoffSep 1, 2026
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