refactor: move DEPRECATION_HEADING_REGEX to legacy-html constants, drop apiStem check

Author: cursoragent

src/generators/legacy-html/constants.mjs

@@ -0,0 +1,5 @@
+'use strict';
+
+// Matches deprecation headings (e.g., "DEP0001: some title") and captures
+// the deprecation code (e.g., "DEP0001") as the first group
+export const DEPRECATION_HEADING_REGEX = /^(DEP\d+):/;

src/generators/legacy-html/utils/__tests__/slugger.test.mjs

@@ -38,7 +38,7 @@ describe('createLegacySlugger', () => {
   });
 
   describe('deprecation headings', () => {
-    it('returns the DEP code for deprecation headings in the deprecations doc', () => {
+    it('returns the DEP code for a deprecation heading', () => {
       const getLegacySlug = createLegacySlugger();
       assert.strictEqual(
         getLegacySlug(
@@ -59,13 +59,5 @@ describe('createLegacySlugger', () => {
         'DEP0190'
       );
     });
-
-    it('does not apply deprecation special-casing outside the deprecations doc', () => {
-      const getLegacySlug = createLegacySlugger();
-      assert.notStrictEqual(
-        getLegacySlug('DEP0190: some heading', 'child_process'),
-        'DEP0190'
-      );
-    });
   });
 });

src/generators/legacy-html/utils/slugger.mjs

@@ -1,26 +1,23 @@
 'use strict';
 
-// Matches headings in the deprecations API doc (e.g., "DEP0001: some title")
-// and captures the deprecation code (e.g., "DEP0001") as the first group
-const DEPRECATION_HEADING_REGEX = /^(DEP\d+):/;
+import { DEPRECATION_HEADING_REGEX } from '../constants.mjs';
 
 /**
  * Creates a stateful slugger for legacy anchor links.
  *
  * Generates underscore-separated slugs in the form `{apiStem}_{text}`,
  * appending `_{n}` for duplicates to preserve historical anchor compatibility.
  *
- * For the deprecations API doc, headings matching the `DEP####:` pattern use
- * just the deprecation code (e.g., `DEP0001`) as the anchor, matching the
- * behavior of the old tooling and preserving existing external links.
+ * Headings matching the `DEP####:` pattern return just the deprecation code
+ * (e.g., `DEP0001`) as the anchor, matching the behavior of the old tooling
+ * and preserving existing external links.
  *
  * @returns {(text: string, apiStem: string) => string}
  */
 export const createLegacySlugger =
   (counters = {}) =>
   (text, apiStem) => {
-    const depMatch =
-      apiStem === 'deprecations' && DEPRECATION_HEADING_REGEX.exec(text);
+    const depMatch = DEPRECATION_HEADING_REGEX.exec(text);
 
     if (depMatch) {
       return depMatch[1];