diff --git a/src/components/ApiDocViewer.tsx b/src/components/ApiDocViewer.tsx
index 5f30ad5..ec48f0e 100644
--- a/src/components/ApiDocViewer.tsx
+++ b/src/components/ApiDocViewer.tsx
@@ -71,13 +71,25 @@ export const ApiDocViewer = ({ onDocsPathChange, showAddModal, onCloseAddModal }
       
       setExternalDocs(docs)
       
+      const dirs = new Set(docs.map(d => {
+        const parts = d.relativePath.split('/')
+        return parts.length >= 2 ? parts.slice(0, -1).join('/') : ''
+      }))
+
+      const dirsWithSubdirs = new Set(
+        docs
+          .filter(d => d.relativePath.split('/').length >= 3)
+          .map(d => d.relativePath.split('/').slice(0, -1).join('/'))
+      )
+
+      const leafDirs = new Set([...dirs].filter(d => !dirsWithSubdirs.has(d)))
+
       const fileList = docs
         .filter(doc => {
           const parts = doc.relativePath.split('/')
           if (parts.length < 2) return true
-          const filename = parts[parts.length - 1].replace(/\.md$/, '')
-          const parentFolder = parts[parts.length - 2]
-          return filename !== parentFolder
+          const parentDir = parts.slice(0, -1).join('/')
+          return !leafDirs.has(parentDir)
         })
         .map(d => d.relativePath)
       const tree = buildFileTree(fileList, '/')