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A simple declaration exporter for Lean 4 using the Lean 4 NDJSON export format

How to Run

  1. Build lean4export with lake build

  2. Call the lean4export binary with the correct lake env set up.

lake env <path to lean4export binary><lean file without .lean suffix>+

For example, let's assume we're working in the mathlib4 directory, with the following structure:

|__ mathlib4 (*we are here)
|__ lean4export

We can invoke the exporter on the "top level" mathlib file and export mathlib with the following command:

lake env ../.lake/build/bin/lean4export Mathlib > out.ndjson

This exports the contents of the given Lean module (here just the top level Mathlib module in the Mathlib.lean file), and its transitive dependencies. A specific list of declarations to be exported from these modules can be given after a separating --, and more than one module can be passed to the initial invocation by including more than one name (separted with a space).

Options

The option --export-unsafe can be used to include unsafe declarations in the export file. This may be useful for testing and debugging other tools, where unsafe declarations can serve as negative examples.

The option --export-mdata" can be used to include Expr.mdata items in the export file, which are removed by default as they should not have an effect on type checking.

About

Plain-text declaration export for Lean 4

Resources

Readme
Apache-2.0 license
Activity
Custom properties

Stars

39 stars

Watchers

11 watching

Forks

24 forks
Report repository

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Used by

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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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A simple declaration exporter for Lean 4 using the Lean 4 NDJSON export format
How to Run
  1. Build lean4export with lake build
  2. Call the lean4export binary with the correct lake env set up.
lake env <path to lean4export binary><lean file without .lean suffix>+
For example, let's assume we're working in the mathlib4 directory, with the following structure:
|__ mathlib4 (*we are here)
|__ lean4export

We can invoke the exporter on the "top level" mathlib file and export mathlib with the following command:
lake env ../.lake/build/bin/lean4export Mathlib > out.ndjson
This exports the contents of the given Lean module (here just the top level Mathlib module in the Mathlib.lean file), and its transitive dependencies. A specific list of declarations to be exported from these modules can be given after a separating --, and more than one module can be passed to the initial invocation by including more than one name (separted with a space).
Options
The option --export-unsafe can be used to include unsafe declarations in the export file. This may be useful for testing and debugging other tools, where unsafe declarations can serve as negative examples.
The option --export-mdata" can be used to include Expr.mdata items in the export file, which are removed by default as they should not have an effect on type checking.
About
Plain-text declaration export for Lean 4
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
39 stars
Watchers
11 watching
Forks
24 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, '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('^' + ".*" + '

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A simple declaration exporter for Lean 4 using the Lean 4 NDJSON export format
How to Run
  1. Build lean4export with lake build
  2. Call the lean4export binary with the correct lake env set up.
lake env <path to lean4export binary><lean file without .lean suffix>+
For example, let's assume we're working in the mathlib4 directory, with the following structure:
|__ mathlib4 (*we are here)
|__ lean4export

We can invoke the exporter on the "top level" mathlib file and export mathlib with the following command:
lake env ../.lake/build/bin/lean4export Mathlib > out.ndjson
This exports the contents of the given Lean module (here just the top level Mathlib module in the Mathlib.lean file), and its transitive dependencies. A specific list of declarations to be exported from these modules can be given after a separating --, and more than one module can be passed to the initial invocation by including more than one name (separted with a space).
Options
The option --export-unsafe can be used to include unsafe declarations in the export file. This may be useful for testing and debugging other tools, where unsafe declarations can serve as negative examples.
The option --export-mdata" can be used to include Expr.mdata items in the export file, which are removed by default as they should not have an effect on type checking.
About
Plain-text declaration export for Lean 4
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
39 stars
Watchers
11 watching
Forks
24 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, '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
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A simple declaration exporter for Lean 4 using the Lean 4 NDJSON export format
How to Run
  1. Build lean4export with lake build
  2. Call the lean4export binary with the correct lake env set up.
lake env <path to lean4export binary><lean file without .lean suffix>+
For example, let's assume we're working in the mathlib4 directory, with the following structure:
|__ mathlib4 (*we are here)
|__ lean4export

We can invoke the exporter on the "top level" mathlib file and export mathlib with the following command:
lake env ../.lake/build/bin/lean4export Mathlib > out.ndjson
This exports the contents of the given Lean module (here just the top level Mathlib module in the Mathlib.lean file), and its transitive dependencies. A specific list of declarations to be exported from these modules can be given after a separating --, and more than one module can be passed to the initial invocation by including more than one name (separted with a space).
Options
The option --export-unsafe can be used to include unsafe declarations in the export file. This may be useful for testing and debugging other tools, where unsafe declarations can serve as negative examples.
The option --export-mdata" can be used to include Expr.mdata items in the export file, which are removed by default as they should not have an effect on type checking.
About
Plain-text declaration export for Lean 4
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
39 stars
Watchers
11 watching
Forks
24 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, '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
BranchesTags
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A simple declaration exporter for Lean 4 using the Lean 4 NDJSON export format
How to Run
  1. Build lean4export with lake build
  2. Call the lean4export binary with the correct lake env set up.
lake env <path to lean4export binary><lean file without .lean suffix>+
For example, let's assume we're working in the mathlib4 directory, with the following structure:
|__ mathlib4 (*we are here)
|__ lean4export

We can invoke the exporter on the "top level" mathlib file and export mathlib with the following command:
lake env ../.lake/build/bin/lean4export Mathlib > out.ndjson
This exports the contents of the given Lean module (here just the top level Mathlib module in the Mathlib.lean file), and its transitive dependencies. A specific list of declarations to be exported from these modules can be given after a separating --, and more than one module can be passed to the initial invocation by including more than one name (separted with a space).
Options
The option --export-unsafe can be used to include unsafe declarations in the export file. This may be useful for testing and debugging other tools, where unsafe declarations can serve as negative examples.
The option --export-mdata" can be used to include Expr.mdata items in the export file, which are removed by default as they should not have an effect on type checking.
About
Plain-text declaration export for Lean 4
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
39 stars
Watchers
11 watching
Forks
24 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, '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
BranchesTags
Repository files navigation
A simple declaration exporter for Lean 4 using the Lean 4 NDJSON export format
How to Run
  1. Build lean4export with lake build
  2. Call the lean4export binary with the correct lake env set up.
lake env <path to lean4export binary><lean file without .lean suffix>+
For example, let's assume we're working in the mathlib4 directory, with the following structure:
|__ mathlib4 (*we are here)
|__ lean4export

We can invoke the exporter on the "top level" mathlib file and export mathlib with the following command:
lake env ../.lake/build/bin/lean4export Mathlib > out.ndjson
This exports the contents of the given Lean module (here just the top level Mathlib module in the Mathlib.lean file), and its transitive dependencies. A specific list of declarations to be exported from these modules can be given after a separating --, and more than one module can be passed to the initial invocation by including more than one name (separted with a space).
Options
The option --export-unsafe can be used to include unsafe declarations in the export file. This may be useful for testing and debugging other tools, where unsafe declarations can serve as negative examples.
The option --export-mdata" can be used to include Expr.mdata items in the export file, which are removed by default as they should not have an effect on type checking.
About
Plain-text declaration export for Lean 4
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
39 stars
Watchers
11 watching
Forks
24 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, '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
BranchesTags
Repository files navigation
A simple declaration exporter for Lean 4 using the Lean 4 NDJSON export format
How to Run
  1. Build lean4export with lake build
  2. Call the lean4export binary with the correct lake env set up.
lake env <path to lean4export binary><lean file without .lean suffix>+
For example, let's assume we're working in the mathlib4 directory, with the following structure:
|__ mathlib4 (*we are here)
|__ lean4export

We can invoke the exporter on the "top level" mathlib file and export mathlib with the following command:
lake env ../.lake/build/bin/lean4export Mathlib > out.ndjson
This exports the contents of the given Lean module (here just the top level Mathlib module in the Mathlib.lean file), and its transitive dependencies. A specific list of declarations to be exported from these modules can be given after a separating --, and more than one module can be passed to the initial invocation by including more than one name (separted with a space).
Options
The option --export-unsafe can be used to include unsafe declarations in the export file. This may be useful for testing and debugging other tools, where unsafe declarations can serve as negative examples.
The option --export-mdata" can be used to include Expr.mdata items in the export file, which are removed by default as they should not have an effect on type checking.
About
Plain-text declaration export for Lean 4
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
39 stars
Watchers
11 watching
Forks
24 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, '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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A simple declaration exporter for Lean 4 using the Lean 4 NDJSON export format
How to Run
  1. Build lean4export with lake build
  2. Call the lean4export binary with the correct lake env set up.
lake env <path to lean4export binary><lean file without .lean suffix>+
For example, let's assume we're working in the mathlib4 directory, with the following structure:
|__ mathlib4 (*we are here)
|__ lean4export

We can invoke the exporter on the "top level" mathlib file and export mathlib with the following command:
lake env ../.lake/build/bin/lean4export Mathlib > out.ndjson
This exports the contents of the given Lean module (here just the top level Mathlib module in the Mathlib.lean file), and its transitive dependencies. A specific list of declarations to be exported from these modules can be given after a separating --, and more than one module can be passed to the initial invocation by including more than one name (separted with a space).
Options
The option --export-unsafe can be used to include unsafe declarations in the export file. This may be useful for testing and debugging other tools, where unsafe declarations can serve as negative examples.
The option --export-mdata" can be used to include Expr.mdata items in the export file, which are removed by default as they should not have an effect on type checking.
About
Plain-text declaration export for Lean 4
Resources
Readme
Apache-2.0 license
Activity
Custom properties
Stars
39 stars
Watchers
11 watching
Forks
24 forks
Report repository
Releases
Packages
Used by
Contributors
Languages