diff --git a/infra/docs-gen/package.json b/infra/docs-gen/package.json
index de6aa64c6..e56195386 100644
--- a/infra/docs-gen/package.json
+++ b/infra/docs-gen/package.json
@@ -14,9 +14,11 @@
     }
   },
   "scripts": {
-    "build": "node src/generate-docs.mjs && yfm -i ../../tmp/docs-src -o ../../dist/docs"
+    "build": "node src/generate-docs.mjs && yfm -i ../../tmp/docs-src -o ../../dist/docs",
+    "test": "node --test src/*.test.mjs"
   },
   "dependencies": {
-    "@diplodoc/cli": "5.43.0"
+    "@diplodoc/cli": "5.43.0",
+    "typescript": "catalog:ts"
   }
 }
diff --git a/infra/docs-gen/src/extension-ast.mjs b/infra/docs-gen/src/extension-ast.mjs
new file mode 100644
index 000000000..1bcf0ad78
--- /dev/null
+++ b/infra/docs-gen/src/extension-ast.mjs
@@ -0,0 +1,47 @@
+/* eslint-disable jsdoc/require-param, jsdoc/require-returns */
+import ts from 'typescript';
+
+import {EXTENSION_TYPE_NAMES} from './extension-config.mjs';
+
+/** Reads the visible name from a TypeScript type reference. */
+function getTypeReferenceName(typeName) {
+    if (ts.isIdentifier(typeName)) return typeName.text;
+    if (ts.isQualifiedName(typeName)) return typeName.right.text;
+
+    return null;
+}
+
+/** Checks that a type annotation references one of the configured names. */
+function isTypeReferenceTo(typeNode, names) {
+    return (
+        typeNode &&
+        ts.isTypeReferenceNode(typeNode) &&
+        names.has(getTypeReferenceName(typeNode.typeName))
+    );
+}
+
+/** Detects direct `export` modifiers on a top-level declaration statement. */
+function hasExportModifier(node) {
+    return ts.getModifiers(node)?.some((modifier) => modifier.kind === ts.SyntaxKind.ExportKeyword);
+}
+
+/** Reads extension export names from a TypeScript source file. */
+export function extractExtensionNamesFromSource(content, fileName = 'source.ts') {
+    const sourceFile = ts.createSourceFile(fileName, content, ts.ScriptTarget.Latest, true);
+    const names = [];
+
+    for (const statement of sourceFile.statements) {
+        if (!ts.isVariableStatement(statement) || !hasExportModifier(statement)) continue;
+
+        for (const declaration of statement.declarationList.declarations) {
+            if (
+                ts.isIdentifier(declaration.name) &&
+                isTypeReferenceTo(declaration.type, EXTENSION_TYPE_NAMES)
+            ) {
+                names.push(declaration.name.text);
+            }
+        }
+    }
+
+    return names;
+}
diff --git a/infra/docs-gen/src/extension-config.mjs b/infra/docs-gen/src/extension-config.mjs
new file mode 100644
index 000000000..29f4e1aff
--- /dev/null
+++ b/infra/docs-gen/src/extension-config.mjs
@@ -0,0 +1,95 @@
+import {dirname, resolve} from 'node:path';
+import {fileURLToPath} from 'node:url';
+
+export const REPO_ROOT = resolve(dirname(fileURLToPath(import.meta.url)), '../../..');
+
+export const EXTENSION_WHITELIST = [
+    {name: 'BaseInputRules', entry: 'packages/editor/src/extensions/base/BaseInputRules/index.ts'},
+    {name: 'BaseKeymap', entry: 'packages/editor/src/extensions/base/BaseKeymap/index.ts'},
+    {name: 'BaseSchema', entry: 'packages/editor/src/extensions/base/BaseSchema/index.ts'},
+    {name: 'BaseStyles', entry: 'packages/editor/src/extensions/base/BaseStyles/index.ts'},
+    {name: 'Autocomplete', entry: 'packages/editor/src/extensions/behavior/Autocomplete/index.ts'},
+    {
+        name: 'ClicksOnEdges',
+        entry: 'packages/editor/src/extensions/behavior/ClicksOnEdges/ClicksOnEdges.ts',
+    },
+    {name: 'Clipboard', entry: 'packages/editor/src/extensions/behavior/Clipboard/index.ts'},
+    {name: 'CommandMenu', entry: 'packages/editor/src/extensions/behavior/CommandMenu/index.ts'},
+    {name: 'Cursor', entry: 'packages/editor/src/extensions/behavior/Cursor/index.ts'},
+    {
+        name: 'EditorModeKeymap',
+        entry: 'packages/editor/src/extensions/behavior/EditorModeKeymap/index.ts',
+    },
+    {name: 'FilePaste', entry: 'packages/editor/src/extensions/behavior/FilePaste/index.ts'},
+    {name: 'History', entry: 'packages/editor/src/extensions/behavior/History/index.ts'},
+    {name: 'Placeholder', entry: 'packages/editor/src/extensions/behavior/Placeholder/index.ts'},
+    {
+        name: 'ReactRendererExtension',
+        entry: 'packages/editor/src/extensions/behavior/ReactRenderer/index.ts',
+    },
+    {name: 'Search', entry: 'packages/editor/src/extensions/behavior/Search/Search.ts'},
+    {name: 'Selection', entry: 'packages/editor/src/extensions/behavior/Selection/index.ts'},
+    {
+        name: 'SelectionContext',
+        entry: 'packages/editor/src/extensions/behavior/SelectionContext/index.ts',
+    },
+    {
+        name: 'SharedState',
+        entry: 'packages/editor/src/extensions/behavior/SharedState/SharedState.ts',
+    },
+    {
+        name: 'WidgetDecoration',
+        entry: 'packages/editor/src/extensions/behavior/WidgetDecoration/index.ts',
+    },
+    {name: 'Bold', entry: 'packages/editor/src/extensions/markdown/Bold/index.ts'},
+    {name: 'Blockquote', entry: 'packages/editor/src/extensions/markdown/Blockquote/index.ts'},
+    {name: 'Breaks', entry: 'packages/editor/src/extensions/markdown/Breaks/index.ts'},
+    {name: 'Code', entry: 'packages/editor/src/extensions/markdown/Code/index.ts'},
+    {name: 'CodeBlock', entry: 'packages/editor/src/extensions/markdown/CodeBlock/index.ts'},
+    {name: 'Deflist', entry: 'packages/editor/src/extensions/markdown/Deflist/index.ts'},
+    {name: 'Heading', entry: 'packages/editor/src/extensions/markdown/Heading/index.ts'},
+    {
+        name: 'HorizontalRule',
+        entry: 'packages/editor/src/extensions/markdown/HorizontalRule/index.ts',
+    },
+    {name: 'Html', entry: 'packages/editor/src/extensions/markdown/Html/index.ts'},
+    {name: 'Image', entry: 'packages/editor/src/extensions/markdown/Image/index.ts'},
+    {name: 'Italic', entry: 'packages/editor/src/extensions/markdown/Italic/index.ts'},
+    {name: 'Link', entry: 'packages/editor/src/extensions/markdown/Link/index.ts'},
+    {name: 'Lists', entry: 'packages/editor/src/extensions/markdown/Lists/index.ts'},
+    {name: 'Mark', entry: 'packages/editor/src/extensions/markdown/Mark/index.ts'},
+    {name: 'Strike', entry: 'packages/editor/src/extensions/markdown/Strike/index.ts'},
+    {name: 'Subscript', entry: 'packages/editor/src/extensions/markdown/Subscript/index.ts'},
+    {name: 'Superscript', entry: 'packages/editor/src/extensions/markdown/Superscript/index.ts'},
+    {name: 'Table', entry: 'packages/editor/src/extensions/markdown/Table/index.ts'},
+    {name: 'Underline', entry: 'packages/editor/src/extensions/markdown/Underline/index.ts'},
+    {name: 'Checkbox', entry: 'packages/editor/src/extensions/yfm/Checkbox/index.ts'},
+    {name: 'Color', entry: 'packages/editor/src/extensions/yfm/Color/index.ts'},
+    {name: 'ImgSize', entry: 'packages/editor/src/extensions/yfm/ImgSize/index.ts'},
+    {name: 'Monospace', entry: 'packages/editor/src/extensions/yfm/Monospace/index.ts'},
+    {name: 'Video', entry: 'packages/editor/src/extensions/yfm/Video/index.ts'},
+    {name: 'YfmConfigs', entry: 'packages/editor/src/extensions/yfm/YfmConfigs/index.ts'},
+    {name: 'YfmCut', entry: 'packages/editor/src/extensions/yfm/YfmCut/index.ts'},
+    {name: 'YfmFile', entry: 'packages/editor/src/extensions/yfm/YfmFile/index.ts'},
+    {name: 'YfmHeading', entry: 'packages/editor/src/extensions/yfm/YfmHeading/index.ts'},
+    {name: 'YfmNote', entry: 'packages/editor/src/extensions/yfm/YfmNote/index.ts'},
+    {name: 'YfmTable', entry: 'packages/editor/src/extensions/yfm/YfmTable/index.ts'},
+    {name: 'YfmTabs', entry: 'packages/editor/src/extensions/yfm/YfmTabs/index.ts'},
+    {
+        name: 'FoldingHeading',
+        entry: 'packages/editor/src/extensions/additional/FoldingHeading/FoldingHeading.ts',
+    },
+    {name: 'Math', entry: 'packages/editor/src/extensions/additional/Math/index.ts'},
+    {name: 'Mermaid', entry: 'packages/editor/src/extensions/additional/Mermaid/index.ts'},
+    {name: 'QuoteLink', entry: 'packages/editor/src/extensions/additional/QuoteLink/index.ts'},
+    {
+        name: 'YfmHtmlBlock',
+        entry: 'packages/editor/src/extensions/additional/YfmHtmlBlock/index.ts',
+    },
+    {
+        name: 'YfmPageConstructorExtension',
+        entry: 'packages/page-constructor-extension/src/extension/index.ts',
+    },
+];
+
+export const EXTENSION_TYPE_NAMES = new Set(['Extension', 'ExtensionAuto', 'ExtensionWithOptions']);
diff --git a/infra/docs-gen/src/extract-extension-data.mjs b/infra/docs-gen/src/extract-extension-data.mjs
new file mode 100644
index 000000000..9de968b2e
--- /dev/null
+++ b/infra/docs-gen/src/extract-extension-data.mjs
@@ -0,0 +1,25 @@
+/* eslint-disable jsdoc/require-param, jsdoc/require-returns */
+import {readFileSync} from 'node:fs';
+import {join} from 'node:path';
+
+import {extractExtensionNamesFromSource} from './extension-ast.mjs';
+import {EXTENSION_WHITELIST, REPO_ROOT} from './extension-config.mjs';
+
+function readWhitelistedExtensionName(repoRoot, {name, entry}) {
+    const filePath = join(repoRoot, entry);
+    const names = extractExtensionNamesFromSource(readFileSync(filePath, 'utf-8'), filePath);
+
+    if (!names.includes(name)) {
+        throw new Error(`Expected "${entry}" to export extension "${name}"`);
+    }
+
+    return name;
+}
+
+/** Reads extension names from the explicit documentation whitelist. */
+export function extractExtensionNames({
+    repoRoot = REPO_ROOT,
+    whitelist = EXTENSION_WHITELIST,
+} = {}) {
+    return whitelist.map((extension) => readWhitelistedExtensionName(repoRoot, extension));
+}
diff --git a/infra/docs-gen/src/extract-extension-data.test.mjs b/infra/docs-gen/src/extract-extension-data.test.mjs
new file mode 100644
index 000000000..f42d15e55
--- /dev/null
+++ b/infra/docs-gen/src/extract-extension-data.test.mjs
@@ -0,0 +1,102 @@
+import assert from 'node:assert/strict';
+import {mkdirSync, mkdtempSync, rmSync, writeFileSync} from 'node:fs';
+import {tmpdir} from 'node:os';
+import {dirname, join} from 'node:path';
+import {afterEach, test} from 'node:test';
+
+import {extractExtensionNamesFromSource} from './extension-ast.mjs';
+import {extractExtensionNames} from './extract-extension-data.mjs';
+
+const cleanupDirs = [];
+
+function makeRepoRoot() {
+    const root = mkdtempSync(join(tmpdir(), 'docs-gen-repo-'));
+    cleanupDirs.push(root);
+
+    return root;
+}
+
+function addFile(root, filePath, content) {
+    const fullPath = join(root, filePath);
+
+    mkdirSync(dirname(fullPath), {recursive: true});
+    writeFileSync(fullPath, content);
+}
+
+afterEach(() => {
+    for (const dir of cleanupDirs.splice(0)) {
+        rmSync(dir, {recursive: true, force: true});
+    }
+});
+
+test('extractExtensionNamesFromSource reads exported extension names from AST', () => {
+    assert.deepEqual(
+        extractExtensionNamesFromSource(
+            [
+                'export const Bold: ExtensionAuto<BoldOptions> = () => {};',
+                'export const BoldSpecs = () => {};',
+                'export type BoldOptions = {};',
+                "export {boldMarkName} from './BoldSpecs';",
+            ].join('\n'),
+        ),
+        ['Bold'],
+    );
+});
+
+test('extractExtensionNames reads only whitelisted extension entry points', () => {
+    const repoRoot = makeRepoRoot();
+
+    addFile(
+        repoRoot,
+        'packages/editor/src/extensions/markdown/Bold/index.ts',
+        [
+            'export const Bold: ExtensionAuto<BoldOptions> = () => {};',
+            'export const BoldSpecs: ExtensionAuto = () => {};',
+        ].join('\n'),
+    );
+    addFile(
+        repoRoot,
+        'packages/editor/src/extensions/markdown/Heading/index.ts',
+        'export const Heading: ExtensionWithOptions<HeadingOptions> = () => {};',
+    );
+    addFile(
+        repoRoot,
+        'packages/editor/src/extensions/markdown/Italic/index.ts',
+        'export const Italic: ExtensionAuto = () => {};',
+    );
+
+    assert.deepEqual(
+        extractExtensionNames({
+            repoRoot,
+            whitelist: [
+                {name: 'Bold', entry: 'packages/editor/src/extensions/markdown/Bold/index.ts'},
+                {
+                    name: 'Heading',
+                    entry: 'packages/editor/src/extensions/markdown/Heading/index.ts',
+                },
+            ],
+        }),
+        ['Bold', 'Heading'],
+    );
+});
+
+test('extractExtensionNames fails when a whitelisted entry does not export the expected name', () => {
+    const repoRoot = makeRepoRoot();
+
+    addFile(
+        repoRoot,
+        'packages/editor/src/extensions/markdown/Bold/index.ts',
+        'export const NotBold: ExtensionAuto = () => {};',
+    );
+
+    assert.throws(
+        () =>
+            extractExtensionNames({
+                repoRoot,
+                whitelist: [
+                    {name: 'Bold', entry: 'packages/editor/src/extensions/markdown/Bold/index.ts'},
+                ],
+            }),
+        /Expected "packages\/editor\/src\/extensions\/markdown\/Bold\/index.ts" to export extension "Bold"/,
+    );
+});
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 410bbfebc..2dc15fbdd 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -306,6 +306,9 @@ importers:
       '@diplodoc/cli':
         specifier: 5.43.0
         version: 5.43.0(@types/markdown-it@13.0.9)(@types/node@25.2.1)(react@18.2.0)
+      typescript:
+        specifier: catalog:ts
+        version: 5.9.3
 
   infra/gulp-tasks:
     dependencies: