diff --git a/CLAUDE.md b/CLAUDE.md
index 483d9573..716f13eb 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -48,7 +48,7 @@ Capability drives presentation. Content for everyone, interactivity for those wh
 
 1. **No CSS preprocessors.** Raw CSS only. CSS custom properties for theming. No LESS, no SASS, no PostCSS.
 2. **CSS Grid only.** No flexbox, no floats. CSS Grid for all layout.
-3. **No jQuery.** Vanilla JavaScript only. Create `custom.js` for shared utilities.
+3. **No jQuery.** Vanilla JavaScript only. Create `ajax.js` for shared utilities.
 4. **No framework bloat.** No Bootstrap, no Tailwind. Semantic HTML + minimal CSS.
 5. **Progressive enhancement.** `<noscript>` fallbacks. `js-only` class pattern. Native HTML5 elements (`<details>`, `<dialog>`, `<datalist>`).
 6. **Mako server-side rendering.** Keep it. It works.
diff --git a/rhodecode/public/js/custom.js b/rhodecode/public/js/ajax.js
similarity index 99%
rename from rhodecode/public/js/custom.js
rename to rhodecode/public/js/ajax.js
index e2eb5d3f..f43653bd 100644
--- a/rhodecode/public/js/custom.js
+++ b/rhodecode/public/js/ajax.js
@@ -1,4 +1,4 @@
-/* custom.js — Vanilla JS utilities, zero dependencies */
+/* ajax.js — Vanilla JS utilities, zero dependencies */
 /* Replaces jQuery patterns with modern DOM APIs */
 
 (function(window, document) {
diff --git a/rhodecode/templates/styleguide/index.mako b/rhodecode/templates/styleguide/index.mako
index 1ce4ddbe..09b53db4 100644
--- a/rhodecode/templates/styleguide/index.mako
+++ b/rhodecode/templates/styleguide/index.mako
@@ -726,7 +726,7 @@
     </main>
 </div>
 
-<script src="${h.asset('js/custom.js')}"></script>
+<script src="${h.asset('js/ajax.js')}"></script>
 
 <script>
     // Sidebar active state on scroll