[FR] Render mermaid diagrams in chat answers (with explicit "Visualize" button) #1240

Description

@wilson101xx

The need
PMs and devs on our team frequently ask Sourcebot questions about how
specific services work end-to-end ("show me a visual of X service",
"what's the request flow through Y?"). The answer is always a long
markdown wall, which is great for devs but hard for PMs to skim.

Proposal
Two-path diagram rendering, in V1:

  1. Automatic — teach the agent to emit a ```mermaid fenced block in
    its markdown answer when the user asks for something visual
    (architecture, workflow, sequence). Render it inline in the answer
    card. No new tool, no new stream part type — just a renderer in the
    existing markdown pipeline.
  2. Explicit — add a "Visualize" button to the answer card that re-prompts
    the agent on the existing thread for a diagram view of the answer.

Diagrams render to a clickable inline SVG with a fullscreen pan/zoom
modal. Architecture is registry-based so a future react-flow engine
can be plugged in without changing the markdown wiring.

Version 2
After we have proof that people are using this feature i propose we can create a inline React Flow, where it can be built in, and interactive, drag and drop and clickable

Activity

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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

      [FR] Render mermaid diagrams in chat answers (with explicit "Visualize" button) #1240

      Description

      @wilson101xx

      The need
      PMs and devs on our team frequently ask Sourcebot questions about how
      specific services work end-to-end ("show me a visual of X service",
      "what's the request flow through Y?"). The answer is always a long
      markdown wall, which is great for devs but hard for PMs to skim.

      Proposal
      Two-path diagram rendering, in V1:

      1. Automatic — teach the agent to emit a ```mermaid fenced block in
        its markdown answer when the user asks for something visual
        (architecture, workflow, sequence). Render it inline in the answer
        card. No new tool, no new stream part type — just a renderer in the
        existing markdown pipeline.
      2. Explicit — add a "Visualize" button to the answer card that re-prompts
        the agent on the existing thread for a diagram view of the answer.

      Diagrams render to a clickable inline SVG with a fullscreen pan/zoom
      modal. Architecture is registry-based so a future react-flow engine
      can be plugged in without changing the markdown wiring.

      Version 2
      After we have proof that people are using this feature i propose we can create a inline React Flow, where it can be built in, and interactive, drag and drop and clickable

      Activity

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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

          [FR] Render mermaid diagrams in chat answers (with explicit "Visualize" button) #1240

          Description

          @wilson101xx

          The need
          PMs and devs on our team frequently ask Sourcebot questions about how
          specific services work end-to-end ("show me a visual of X service",
          "what's the request flow through Y?"). The answer is always a long
          markdown wall, which is great for devs but hard for PMs to skim.

          Proposal
          Two-path diagram rendering, in V1:

          1. Automatic — teach the agent to emit a ```mermaid fenced block in
            its markdown answer when the user asks for something visual
            (architecture, workflow, sequence). Render it inline in the answer
            card. No new tool, no new stream part type — just a renderer in the
            existing markdown pipeline.
          2. Explicit — add a "Visualize" button to the answer card that re-prompts
            the agent on the existing thread for a diagram view of the answer.

          Diagrams render to a clickable inline SVG with a fullscreen pan/zoom
          modal. Architecture is registry-based so a future react-flow engine
          can be plugged in without changing the markdown wiring.

          Version 2
          After we have proof that people are using this feature i propose we can create a inline React Flow, where it can be built in, and interactive, drag and drop and clickable

          Activity

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

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              No milestone

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              None yet

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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

              [FR] Render mermaid diagrams in chat answers (with explicit "Visualize" button) #1240

              Description

              @wilson101xx

              The need
              PMs and devs on our team frequently ask Sourcebot questions about how
              specific services work end-to-end ("show me a visual of X service",
              "what's the request flow through Y?"). The answer is always a long
              markdown wall, which is great for devs but hard for PMs to skim.

              Proposal
              Two-path diagram rendering, in V1:

              1. Automatic — teach the agent to emit a ```mermaid fenced block in
                its markdown answer when the user asks for something visual
                (architecture, workflow, sequence). Render it inline in the answer
                card. No new tool, no new stream part type — just a renderer in the
                existing markdown pipeline.
              2. Explicit — add a "Visualize" button to the answer card that re-prompts
                the agent on the existing thread for a diagram view of the answer.

              Diagrams render to a clickable inline SVG with a fullscreen pan/zoom
              modal. Architecture is registry-based so a future react-flow engine
              can be plugged in without changing the markdown wiring.

              Version 2
              After we have proof that people are using this feature i propose we can create a inline React Flow, where it can be built in, and interactive, drag and drop and clickable

              Activity

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

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              Assignees

              No one assigned

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                  None yet

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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

                  [FR] Render mermaid diagrams in chat answers (with explicit "Visualize" button) #1240

                  Description

                  @wilson101xx

                  The need
                  PMs and devs on our team frequently ask Sourcebot questions about how
                  specific services work end-to-end ("show me a visual of X service",
                  "what's the request flow through Y?"). The answer is always a long
                  markdown wall, which is great for devs but hard for PMs to skim.

                  Proposal
                  Two-path diagram rendering, in V1:

                  1. Automatic — teach the agent to emit a ```mermaid fenced block in
                    its markdown answer when the user asks for something visual
                    (architecture, workflow, sequence). Render it inline in the answer
                    card. No new tool, no new stream part type — just a renderer in the
                    existing markdown pipeline.
                  2. Explicit — add a "Visualize" button to the answer card that re-prompts
                    the agent on the existing thread for a diagram view of the answer.

                  Diagrams render to a clickable inline SVG with a fullscreen pan/zoom
                  modal. Architecture is registry-based so a future react-flow engine
                  can be plugged in without changing the markdown wiring.

                  Version 2
                  After we have proof that people are using this feature i propose we can create a inline React Flow, where it can be built in, and interactive, drag and drop and clickable

                  Activity

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

                  Metadata

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                  Assignees

                  No one assigned

                    Labels

                    Type

                    No type

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                    No projects

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                      No milestone

                      Relationships

                      None yet

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                      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

                      [FR] Render mermaid diagrams in chat answers (with explicit "Visualize" button) #1240

                      Description

                      @wilson101xx

                      The need
                      PMs and devs on our team frequently ask Sourcebot questions about how
                      specific services work end-to-end ("show me a visual of X service",
                      "what's the request flow through Y?"). The answer is always a long
                      markdown wall, which is great for devs but hard for PMs to skim.

                      Proposal
                      Two-path diagram rendering, in V1:

                      1. Automatic — teach the agent to emit a ```mermaid fenced block in
                        its markdown answer when the user asks for something visual
                        (architecture, workflow, sequence). Render it inline in the answer
                        card. No new tool, no new stream part type — just a renderer in the
                        existing markdown pipeline.
                      2. Explicit — add a "Visualize" button to the answer card that re-prompts
                        the agent on the existing thread for a diagram view of the answer.

                      Diagrams render to a clickable inline SVG with a fullscreen pan/zoom
                      modal. Architecture is registry-based so a future react-flow engine
                      can be plugged in without changing the markdown wiring.

                      Version 2
                      After we have proof that people are using this feature i propose we can create a inline React Flow, where it can be built in, and interactive, drag and drop and clickable

                      Activity

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

                      Metadata

                      Metadata

                      Assignees

                      No one assigned

                        Labels

                        Type

                        No type

                        Projects

                        No projects

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                          No milestone

                          Relationships

                          None yet

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                          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

                          [FR] Render mermaid diagrams in chat answers (with explicit "Visualize" button) #1240

                          Description

                          @wilson101xx

                          The need
                          PMs and devs on our team frequently ask Sourcebot questions about how
                          specific services work end-to-end ("show me a visual of X service",
                          "what's the request flow through Y?"). The answer is always a long
                          markdown wall, which is great for devs but hard for PMs to skim.

                          Proposal
                          Two-path diagram rendering, in V1:

                          1. Automatic — teach the agent to emit a ```mermaid fenced block in
                            its markdown answer when the user asks for something visual
                            (architecture, workflow, sequence). Render it inline in the answer
                            card. No new tool, no new stream part type — just a renderer in the
                            existing markdown pipeline.
                          2. Explicit — add a "Visualize" button to the answer card that re-prompts
                            the agent on the existing thread for a diagram view of the answer.

                          Diagrams render to a clickable inline SVG with a fullscreen pan/zoom
                          modal. Architecture is registry-based so a future react-flow engine
                          can be plugged in without changing the markdown wiring.

                          Version 2
                          After we have proof that people are using this feature i propose we can create a inline React Flow, where it can be built in, and interactive, drag and drop and clickable

                          Activity

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

                          Metadata

                          Metadata

                          Assignees

                          No one assigned

                            Labels

                            Type

                            No type

                            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

                              [FR] Render mermaid diagrams in chat answers (with explicit "Visualize" button) #1240

                              Description

                              @wilson101xx

                              The need
                              PMs and devs on our team frequently ask Sourcebot questions about how
                              specific services work end-to-end ("show me a visual of X service",
                              "what's the request flow through Y?"). The answer is always a long
                              markdown wall, which is great for devs but hard for PMs to skim.

                              Proposal
                              Two-path diagram rendering, in V1:

                              1. Automatic — teach the agent to emit a ```mermaid fenced block in
                                its markdown answer when the user asks for something visual
                                (architecture, workflow, sequence). Render it inline in the answer
                                card. No new tool, no new stream part type — just a renderer in the
                                existing markdown pipeline.
                              2. Explicit — add a "Visualize" button to the answer card that re-prompts
                                the agent on the existing thread for a diagram view of the answer.

                              Diagrams render to a clickable inline SVG with a fullscreen pan/zoom
                              modal. Architecture is registry-based so a future react-flow engine
                              can be plugged in without changing the markdown wiring.

                              Version 2
                              After we have proof that people are using this feature i propose we can create a inline React Flow, where it can be built in, and interactive, drag and drop and clickable

                              Activity

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

                              Metadata

                              Metadata

                              Assignees

                              No one assigned

                                Labels

                                Type

                                No type

                                Projects

                                No projects

                                  Milestone

                                  No milestone

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                                  None yet

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                                  No branches or pull requests

                                  Issue actions