FrontMatter — Jackson YAML typed view #7

Open
Open
FrontMatter — Jackson YAML typed view#7

Description

@roxspring
roxspring
opened on Aug 24, 2026

Implement a typed accessor for front matter values backed by Jackson YAML.

Scope

  • FrontMatter — wraps the raw front matter string, provides typed get/set access via Jackson YAMLMapper
  • MarkdownDocument.frontMatter: FrontMatter? extension or property
  • Support reading arbitrary keys as String, List<String>, Int, Boolean
  • Support writing back a modified value and obtaining the updated raw YAML string (for writing back into the opaque AST node)

Notes

  • Jackson YAML is already a dependency — use YAMLMapper directly, no extra libraries
  • Nested YAML structures should be accessible but are not a primary use case

Acceptance criteria

  • frontMatter["title"] returns the title string
  • frontMatter["tags"] returns a List<String>
  • Modified front matter can be serialised back to a valid YAML string and round-tripped through the opaque node

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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
      FrontMatter — Jackson YAML typed view #7
      Open
      Open
      FrontMatter — Jackson YAML typed view#7
      Description
      @roxspring
      roxspring
      opened on Aug 24, 2026
      Implement a typed accessor for front matter values backed by Jackson YAML.
      Scope
      • FrontMatter — wraps the raw front matter string, provides typed get/set access via Jackson YAMLMapper
      • MarkdownDocument.frontMatter: FrontMatter? extension or property
      • Support reading arbitrary keys as String, List<String>, Int, Boolean
      • Support writing back a modified value and obtaining the updated raw YAML string (for writing back into the opaque AST node)
      Notes
      • Jackson YAML is already a dependency — use YAMLMapper directly, no extra libraries
      • Nested YAML structures should be accessible but are not a primary use case
      Acceptance criteria
      • frontMatter["title"] returns the title string
      • frontMatter["tags"] returns a List<String>
      • Modified front matter can be serialised back to a valid YAML string and round-tripped through the opaque node
      Metadata
      Metadata
      Assignees
      No one assigned
        Labels
        No labels
        No labels
        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
          FrontMatter — Jackson YAML typed view #7
          Open
          Open
          FrontMatter — Jackson YAML typed view#7
          Description
          @roxspring
          roxspring
          opened on Aug 24, 2026
          Implement a typed accessor for front matter values backed by Jackson YAML.
          Scope
          • FrontMatter — wraps the raw front matter string, provides typed get/set access via Jackson YAMLMapper
          • MarkdownDocument.frontMatter: FrontMatter? extension or property
          • Support reading arbitrary keys as String, List<String>, Int, Boolean
          • Support writing back a modified value and obtaining the updated raw YAML string (for writing back into the opaque AST node)
          Notes
          • Jackson YAML is already a dependency — use YAMLMapper directly, no extra libraries
          • Nested YAML structures should be accessible but are not a primary use case
          Acceptance criteria
          • frontMatter["title"] returns the title string
          • frontMatter["tags"] returns a List<String>
          • Modified front matter can be serialised back to a valid YAML string and round-tripped through the opaque node
          Metadata
          Metadata
          Assignees
          No one assigned
            Labels
            No labels
            No labels
            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
              FrontMatter — Jackson YAML typed view #7
              Open
              Open
              FrontMatter — Jackson YAML typed view#7
              Description
              @roxspring
              roxspring
              opened on Aug 24, 2026
              Implement a typed accessor for front matter values backed by Jackson YAML.
              Scope
              • FrontMatter — wraps the raw front matter string, provides typed get/set access via Jackson YAMLMapper
              • MarkdownDocument.frontMatter: FrontMatter? extension or property
              • Support reading arbitrary keys as String, List<String>, Int, Boolean
              • Support writing back a modified value and obtaining the updated raw YAML string (for writing back into the opaque AST node)
              Notes
              • Jackson YAML is already a dependency — use YAMLMapper directly, no extra libraries
              • Nested YAML structures should be accessible but are not a primary use case
              Acceptance criteria
              • frontMatter["title"] returns the title string
              • frontMatter["tags"] returns a List<String>
              • Modified front matter can be serialised back to a valid YAML string and round-tripped through the opaque node
              Metadata
              Metadata
              Assignees
              No one assigned
                Labels
                No labels
                No labels
                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
                  FrontMatter — Jackson YAML typed view #7
                  Open
                  Open
                  FrontMatter — Jackson YAML typed view#7
                  Description
                  @roxspring
                  roxspring
                  opened on Aug 24, 2026
                  Implement a typed accessor for front matter values backed by Jackson YAML.
                  Scope
                  • FrontMatter — wraps the raw front matter string, provides typed get/set access via Jackson YAMLMapper
                  • MarkdownDocument.frontMatter: FrontMatter? extension or property
                  • Support reading arbitrary keys as String, List<String>, Int, Boolean
                  • Support writing back a modified value and obtaining the updated raw YAML string (for writing back into the opaque AST node)
                  Notes
                  • Jackson YAML is already a dependency — use YAMLMapper directly, no extra libraries
                  • Nested YAML structures should be accessible but are not a primary use case
                  Acceptance criteria
                  • frontMatter["title"] returns the title string
                  • frontMatter["tags"] returns a List<String>
                  • Modified front matter can be serialised back to a valid YAML string and round-tripped through the opaque node
                  Metadata
                  Metadata
                  Assignees
                  No one assigned
                    Labels
                    No labels
                    No labels
                    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
                      FrontMatter — Jackson YAML typed view #7
                      Open
                      Open
                      FrontMatter — Jackson YAML typed view#7
                      Description
                      @roxspring
                      roxspring
                      opened on Aug 24, 2026
                      Implement a typed accessor for front matter values backed by Jackson YAML.
                      Scope
                      • FrontMatter — wraps the raw front matter string, provides typed get/set access via Jackson YAMLMapper
                      • MarkdownDocument.frontMatter: FrontMatter? extension or property
                      • Support reading arbitrary keys as String, List<String>, Int, Boolean
                      • Support writing back a modified value and obtaining the updated raw YAML string (for writing back into the opaque AST node)
                      Notes
                      • Jackson YAML is already a dependency — use YAMLMapper directly, no extra libraries
                      • Nested YAML structures should be accessible but are not a primary use case
                      Acceptance criteria
                      • frontMatter["title"] returns the title string
                      • frontMatter["tags"] returns a List<String>
                      • Modified front matter can be serialised back to a valid YAML string and round-tripped through the opaque node
                      Metadata
                      Metadata
                      Assignees
                      No one assigned
                        Labels
                        No labels
                        No labels
                        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
                          FrontMatter — Jackson YAML typed view #7
                          Open
                          Open
                          FrontMatter — Jackson YAML typed view#7
                          Description
                          @roxspring
                          roxspring
                          opened on Aug 24, 2026
                          Implement a typed accessor for front matter values backed by Jackson YAML.
                          Scope
                          • FrontMatter — wraps the raw front matter string, provides typed get/set access via Jackson YAMLMapper
                          • MarkdownDocument.frontMatter: FrontMatter? extension or property
                          • Support reading arbitrary keys as String, List<String>, Int, Boolean
                          • Support writing back a modified value and obtaining the updated raw YAML string (for writing back into the opaque AST node)
                          Notes
                          • Jackson YAML is already a dependency — use YAMLMapper directly, no extra libraries
                          • Nested YAML structures should be accessible but are not a primary use case
                          Acceptance criteria
                          • frontMatter["title"] returns the title string
                          • frontMatter["tags"] returns a List<String>
                          • Modified front matter can be serialised back to a valid YAML string and round-tripped through the opaque node
                          Metadata
                          Metadata
                          Assignees
                          No one assigned
                            Labels
                            No labels
                            No labels
                            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
                              FrontMatter — Jackson YAML typed view #7
                              Open
                              Open
                              FrontMatter — Jackson YAML typed view#7
                              Description
                              @roxspring
                              roxspring
                              opened on Aug 24, 2026
                              Implement a typed accessor for front matter values backed by Jackson YAML.
                              Scope
                              • FrontMatter — wraps the raw front matter string, provides typed get/set access via Jackson YAMLMapper
                              • MarkdownDocument.frontMatter: FrontMatter? extension or property
                              • Support reading arbitrary keys as String, List<String>, Int, Boolean
                              • Support writing back a modified value and obtaining the updated raw YAML string (for writing back into the opaque AST node)
                              Notes
                              • Jackson YAML is already a dependency — use YAMLMapper directly, no extra libraries
                              • Nested YAML structures should be accessible but are not a primary use case
                              Acceptance criteria
                              • frontMatter["title"] returns the title string
                              • frontMatter["tags"] returns a List<String>
                              • Modified front matter can be serialised back to a valid YAML string and round-tripped through the opaque node
                              Metadata
                              Metadata
                              Assignees
                              No one assigned
                                Labels
                                No labels
                                No labels
                                Projects
                                No projects
                                  Milestone
                                  No milestone
                                  Relationships
                                  None yet
                                  Development
                                  No branches or pull requests
                                  Issue actions