diff --git a/vite.config.js b/vite.config.js
index 6a53196..5a607bb 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -9,18 +9,10 @@ function dailyVersioning() {
     name: 'daily-versioning',
     enforce: 'post',
     writeBundle(options, bundle) {
-      const now = new Date()
-      const date = now.getFullYear()
-        + String(now.getMonth() + 1).padStart(2, '0')
-        + String(now.getDate()).padStart(2, '0')
-      
-      const oldPath = join(options.dir || 'dist', 'index.html')
-      const newName = `grandclaw-archtype-${date}.html`
-      const newPath = join(options.dir || 'dist', newName)
-      
-      if (bundle['index.html']) {
-        renameSync(oldPath, newPath)
-      }
+      if (!bundle['index.html']) return
+      const dir = options.dir || 'dist'
+      const date = new Date().toISOString().slice(0, 10).replace(/-/g, '')
+      renameSync(join(dir, 'index.html'), join(dir, `grandclaw-archtype-${date}.html`))
     }
   }
 }