Fail fast on head identifier in syntax-tree class - #810

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jackfirth merged 1 commit into
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fix-800-flattening-perf
Jul 11, 2026
Merged

Fail fast on head identifier in syntax-tree class#810
jackfirth merged 1 commit into
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fix-800-flattening-perf

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Fixes#800.

The syntax-tree class parsed every subform recursively before checking the head identifier, so the four flattening rules descended entire subtrees only to reject most forms afterward. Moving the free-identifier=? check ahead of the subtree parse lets non-matching forms fail immediately.

@jackfirth@claude
Fail fast on head identifier in syntax-tree class
f56e3e0
Check the branch identifier before recursively parsing subtrees, so
forms whose head isn't the branch identifier no longer descend the
entire subtree only to be rejected afterward.
Fixes#800
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Resyntax analyzed 1 file in this pull request and found no issues.

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Docs preview: https://resyntax.notjack.space/preview/810/

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coverage: 95.319%. remained the same — fix-800-flattening-perf into master

@jackfirth
jackfirth merged commit e32da9f into masterJul 11, 2026
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jackfirth deleted the fix-800-flattening-perf branch July 11, 2026 21:05
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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" + '

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Fail fast on head identifier in syntax-tree class - #810
Merged
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
Jul 11, 2026
Merged
Fail fast on head identifier in syntax-tree class#810
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
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@jackfirth
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Jul 11, 2026

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Fixes#800.
The syntax-tree class parsed every subform recursively before checking the head identifier, so the four flattening rules descended entire subtrees only to reject most forms afterward. Moving the free-identifier=? check ahead of the subtree parse lets non-matching forms fail immediately.
@jackfirth@claude
Fail fast on head identifier in syntax-tree class
f56e3e0
Check the branch identifier before recursively parsing subtrees, so
forms whose head isn't the branch identifier no longer descend the
entire subtree only to be rejected afterward.
Fixes#800
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
github-actions[bot]
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approved these changes
Jul 11, 2026
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Resyntax analyzed 1 file in this pull request and found no issues.
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Docs preview: https://resyntax.notjack.space/preview/810/
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Coverage Status
coverage: 95.319%. remained the same — fix-800-flattening-perf into master
@jackfirth
jackfirth
merged commit e32da9f
into
masterJul 11, 2026

12 checks passed

@jackfirth
jackfirth
deleted the

fix-800-flattening-perf

branch
July 11, 2026 21:05
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syntax-tree-based flattening rules dominate rule-checking time


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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
Fail fast on head identifier in syntax-tree class - #810
Merged
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
Jul 11, 2026
Merged
Fail fast on head identifier in syntax-tree class#810
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
Conversation
@jackfirth
@jackfirthjackfirth
commented
Jul 11, 2026

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Fixes#800.
The syntax-tree class parsed every subform recursively before checking the head identifier, so the four flattening rules descended entire subtrees only to reject most forms afterward. Moving the free-identifier=? check ahead of the subtree parse lets non-matching forms fail immediately.
@jackfirth@claude
Fail fast on head identifier in syntax-tree class
f56e3e0
Check the branch identifier before recursively parsing subtrees, so
forms whose head isn't the branch identifier no longer descend the
entire subtree only to be rejected afterward.
Fixes#800
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
github-actions[bot]
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approved these changes
Jul 11, 2026
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Resyntax analyzed 1 file in this pull request and found no issues.
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Docs preview: https://resyntax.notjack.space/preview/810/
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Jul 11, 2026

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Coverage Status
coverage: 95.319%. remained the same — fix-800-flattening-perf into master
@jackfirth
jackfirth
merged commit e32da9f
into
masterJul 11, 2026

12 checks passed

@jackfirth
jackfirth
deleted the

fix-800-flattening-perf

branch
July 11, 2026 21:05
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syntax-tree-based flattening rules dominate rule-checking time


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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
Fail fast on head identifier in syntax-tree class - #810
Merged
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
Jul 11, 2026
Merged
Fail fast on head identifier in syntax-tree class#810
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
Conversation
@jackfirth
@jackfirthjackfirth
commented
Jul 11, 2026

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Owner
Fixes#800.
The syntax-tree class parsed every subform recursively before checking the head identifier, so the four flattening rules descended entire subtrees only to reject most forms afterward. Moving the free-identifier=? check ahead of the subtree parse lets non-matching forms fail immediately.
@jackfirth@claude
Fail fast on head identifier in syntax-tree class
f56e3e0
Check the branch identifier before recursively parsing subtrees, so
forms whose head isn't the branch identifier no longer descend the
entire subtree only to be rejected afterward.
Fixes#800
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
github-actions[bot]
github-actionsBot
approved these changes
Jul 11, 2026
View reviewed changes
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Resyntax analyzed 1 file in this pull request and found no issues.
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Jul 11, 2026

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Docs preview: https://resyntax.notjack.space/preview/810/
@coveralls
coveralls
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Jul 11, 2026

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Coverage Status
coverage: 95.319%. remained the same — fix-800-flattening-perf into master
@jackfirth
jackfirth
merged commit e32da9f
into
masterJul 11, 2026

12 checks passed

@jackfirth
jackfirth
deleted the

fix-800-flattening-perf

branch
July 11, 2026 21:05
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syntax-tree-based flattening rules dominate rule-checking time


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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
Fail fast on head identifier in syntax-tree class - #810
Merged
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
Jul 11, 2026
Merged
Fail fast on head identifier in syntax-tree class#810
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
Conversation
@jackfirth
@jackfirthjackfirth
commented
Jul 11, 2026

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Owner
Fixes#800.
The syntax-tree class parsed every subform recursively before checking the head identifier, so the four flattening rules descended entire subtrees only to reject most forms afterward. Moving the free-identifier=? check ahead of the subtree parse lets non-matching forms fail immediately.
@jackfirth@claude
Fail fast on head identifier in syntax-tree class
f56e3e0
Check the branch identifier before recursively parsing subtrees, so
forms whose head isn't the branch identifier no longer descend the
entire subtree only to be rejected afterward.
Fixes#800
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
github-actions[bot]
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approved these changes
Jul 11, 2026
View reviewed changes
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Resyntax analyzed 1 file in this pull request and found no issues.
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Docs preview: https://resyntax.notjack.space/preview/810/
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Coverage Status
coverage: 95.319%. remained the same — fix-800-flattening-perf into master
@jackfirth
jackfirth
merged commit e32da9f
into
masterJul 11, 2026

12 checks passed

@jackfirth
jackfirth
deleted the

fix-800-flattening-perf

branch
July 11, 2026 21:05
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syntax-tree-based flattening rules dominate rule-checking time


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@jackfirth@coveralls

, '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
Fail fast on head identifier in syntax-tree class - #810
Merged
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
Jul 11, 2026
Merged
Fail fast on head identifier in syntax-tree class#810
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
Conversation
@jackfirth
@jackfirthjackfirth
commented
Jul 11, 2026

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Owner
Fixes#800.
The syntax-tree class parsed every subform recursively before checking the head identifier, so the four flattening rules descended entire subtrees only to reject most forms afterward. Moving the free-identifier=? check ahead of the subtree parse lets non-matching forms fail immediately.
@jackfirth@claude
Fail fast on head identifier in syntax-tree class
f56e3e0
Check the branch identifier before recursively parsing subtrees, so
forms whose head isn't the branch identifier no longer descend the
entire subtree only to be rejected afterward.
Fixes#800
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
github-actions[bot]
github-actionsBot
approved these changes
Jul 11, 2026
View reviewed changes
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Resyntax analyzed 1 file in this pull request and found no issues.
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Docs preview: https://resyntax.notjack.space/preview/810/
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Coverage Status
coverage: 95.319%. remained the same — fix-800-flattening-perf into master
@jackfirth
jackfirth
merged commit e32da9f
into
masterJul 11, 2026

12 checks passed

@jackfirth
jackfirth
deleted the

fix-800-flattening-perf

branch
July 11, 2026 21:05
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syntax-tree-based flattening rules dominate rule-checking time


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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
Fail fast on head identifier in syntax-tree class - #810
Merged
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
Jul 11, 2026
Merged
Fail fast on head identifier in syntax-tree class#810
jackfirth merged 1 commit into
masterfrom 
fix-800-flattening-perf
Conversation
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commented
Jul 11, 2026

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Owner
Fixes#800.
The syntax-tree class parsed every subform recursively before checking the head identifier, so the four flattening rules descended entire subtrees only to reject most forms afterward. Moving the free-identifier=? check ahead of the subtree parse lets non-matching forms fail immediately.
@jackfirth@claude
Fail fast on head identifier in syntax-tree class
f56e3e0
Check the branch identifier before recursively parsing subtrees, so
forms whose head isn't the branch identifier no longer descend the
entire subtree only to be rejected afterward.
Fixes#800
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
github-actions[bot]
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approved these changes
Jul 11, 2026
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Resyntax analyzed 1 file in this pull request and found no issues.
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Docs preview: https://resyntax.notjack.space/preview/810/
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Coverage Status
coverage: 95.319%. remained the same — fix-800-flattening-perf into master
@jackfirth
jackfirth
merged commit e32da9f
into
masterJul 11, 2026

12 checks passed

@jackfirth
jackfirth
deleted the

fix-800-flattening-perf

branch
July 11, 2026 21:05
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syntax-tree-based flattening rules dominate rule-checking time


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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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Fail fast on head identifier in syntax-tree class - #810
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jackfirth merged 1 commit into
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fix-800-flattening-perf
Jul 11, 2026
Merged
Fail fast on head identifier in syntax-tree class#810
jackfirth merged 1 commit into
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fix-800-flattening-perf
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Jul 11, 2026

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Fixes#800.
The syntax-tree class parsed every subform recursively before checking the head identifier, so the four flattening rules descended entire subtrees only to reject most forms afterward. Moving the free-identifier=? check ahead of the subtree parse lets non-matching forms fail immediately.
@jackfirth@claude
Fail fast on head identifier in syntax-tree class
f56e3e0
Check the branch identifier before recursively parsing subtrees, so
forms whose head isn't the branch identifier no longer descend the
entire subtree only to be rejected afterward.
Fixes#800
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Resyntax analyzed 1 file in this pull request and found no issues.
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Docs preview: https://resyntax.notjack.space/preview/810/
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Coverage Status
coverage: 95.319%. remained the same — fix-800-flattening-perf into master
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syntax-tree-based flattening rules dominate rule-checking time


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