diff --git a/scripts/build-extension.js b/scripts/build-extension.js
index 8ea87192..6119ec12 100644
--- a/scripts/build-extension.js
+++ b/scripts/build-extension.js
@@ -14,6 +14,7 @@
 import fs from 'fs';
 import path from 'path';
 import { fileURLToPath } from 'url';
+import { ANTIPATTERNS } from '../src/detect-antipatterns.mjs';
 
 const __dirname = path.dirname(fileURLToPath(import.meta.url));
 const ROOT = path.resolve(__dirname, '..');
@@ -54,22 +55,14 @@ console.log(`Generated ${path.relative(ROOT, DETECTOR_OUTPUT)} (${(output.length
 
 // --- 2. Extract antipatterns.json ---
 
-const rawSource = fs.readFileSync(SOURCE, 'utf-8');
-const apMatch = rawSource.match(/const ANTIPATTERNS = \[([\s\S]*?)\n\];/);
-if (apMatch) {
-  // Convert JS object literals to JSON. Include description so the
-  // devtools panel can show the full rule explanation in tooltips —
-  // previously this dropped description and the panel had nothing to display.
-  const antipatterns = new Function(`return [${apMatch[1]}]`)();
-  const apJson = antipatterns.map(({ id, name, category, description }) => ({
-    id,
-    name,
-    category: category || 'quality',
-    description: description || '',
-  }));
-  fs.writeFileSync(AP_OUTPUT, JSON.stringify(apJson, null, 2) + '\n');
-  console.log(`Generated ${path.relative(ROOT, AP_OUTPUT)} (${antipatterns.length} rules)`);
-}
+const apJson = ANTIPATTERNS.map(({ id, name, category, description }) => ({
+  id,
+  name,
+  category: category || 'quality',
+  description: description || '',
+}));
+fs.writeFileSync(AP_OUTPUT, JSON.stringify(apJson, null, 2) + '\n');
+console.log(`Generated ${path.relative(ROOT, AP_OUTPUT)} (${ANTIPATTERNS.length} rules)`);
 
 // --- 3. Zip packaging ---
 
diff --git a/scripts/build.js b/scripts/build.js
index 53f50610..e546e238 100644
--- a/scripts/build.js
+++ b/scripts/build.js
@@ -21,6 +21,7 @@ import { readSourceFiles, readPatterns } from './lib/utils.js';
 import { createTransformer, PROVIDERS } from './lib/transformers/index.js';
 import { createAllZips } from './lib/zip.js';
 import { generateSubPages } from './build-sub-pages.js';
+import { ANTIPATTERNS } from '../src/detect-antipatterns.mjs';
 
 /**
  * Generate authoritative counts from source data and write to public/js/generated/counts.js.
@@ -112,14 +113,6 @@ function generateCounts(rootDir, skills, buildDir) {
  * Returns the number of validation errors. Build fails if > 0.
  */
 function validateAntipatternRules(rootDir) {
-  const detectPath = path.join(rootDir, 'src/detect-antipatterns.mjs');
-  const src = fs.readFileSync(detectPath, 'utf-8');
-  const apMatch = src.match(/const ANTIPATTERNS = \[([\s\S]*?)\n\];/);
-  if (!apMatch) {
-    console.error('  ❌ Could not extract ANTIPATTERNS from detect-antipatterns.mjs');
-    return 1;
-  }
-  const antipatterns = new Function(`return [${apMatch[1]}]`)();
   const { antipatterns: skillSections } = readPatterns(rootDir);
 
   // Build section -> joined-DON'T-text lookup for substring matching.
@@ -134,7 +127,7 @@ function validateAntipatternRules(rootDir) {
 
   let errors = 0;
   let validated = 0;
-  for (const rule of antipatterns) {
+  for (const rule of ANTIPATTERNS) {
     if (!rule.skillGuideline) continue;
     if (!rule.skillSection) {
       console.error(`  ❌ Rule '${rule.id}' declares skillGuideline but no skillSection`);
@@ -158,7 +151,7 @@ function validateAntipatternRules(rootDir) {
   if (errors > 0) {
     console.error(`\n❌ ${errors} anti-pattern rule(s) drift between src/detect-antipatterns.mjs and source/skills/impeccable/SKILL.md`);
   } else {
-    console.log(`✓ Validated ${validated}/${antipatterns.length} anti-pattern rules against impeccable SKILL.md`);
+    console.log(`✓ Validated ${validated}/${ANTIPATTERNS.length} anti-pattern rules against impeccable SKILL.md`);
   }
   return errors;
 }
diff --git a/scripts/lib/sub-pages-data.js b/scripts/lib/sub-pages-data.js
index 61246f93..7ad876bb 100644
--- a/scripts/lib/sub-pages-data.js
+++ b/scripts/lib/sub-pages-data.js
@@ -14,6 +14,7 @@ import fs from 'node:fs';
 import path from 'node:path';
 import { pathToFileURL } from 'node:url';
 import { readSourceFiles, parseFrontmatter } from './utils.js';
+import { ANTIPATTERNS } from '../../src/detect-antipatterns.mjs';
 import {
   DETECTION_LAYERS,
   VISUAL_EXAMPLES,
@@ -92,19 +93,11 @@ export const CATEGORY_DESCRIPTIONS = {
 };
 
 /**
- * Parse the ANTIPATTERNS array out of src/detect-antipatterns.mjs.
- * Mirrors the trick in scripts/build.js validateAntipatternRules() so we
- * don't have to run the browser-only module.
+ * Returns the ANTIPATTERNS array from src/detect-antipatterns.mjs.
+ * Previously extracted via regex + new Function(); now uses a direct ESM import.
  */
-export function readAntipatternRules(rootDir) {
-  const detectPath = path.join(rootDir, 'src/detect-antipatterns.mjs');
-  const src = fs.readFileSync(detectPath, 'utf-8');
-  const match = src.match(/const ANTIPATTERNS = \[([\s\S]*?)\n\];/);
-  if (!match) {
-    throw new Error(`Could not extract ANTIPATTERNS from ${detectPath}`);
-  }
-  // eslint-disable-next-line no-new-func
-  return new Function(`return [${match[1]}]`)();
+export function readAntipatternRules(_rootDir) {
+  return ANTIPATTERNS;
 }
 
 /**