diff --git a/wwwroot/knowledge_bases_list/delete_kb.dspy b/wwwroot/knowledge_bases_list/delete_kb.dspy
index d18b091..0cfab5d 100644
--- a/wwwroot/knowledge_bases_list/delete_kb.dspy
+++ b/wwwroot/knowledge_bases_list/delete_kb.dspy
@@ -9,10 +9,10 @@ if not kb_id:
 
 env = request._run_ns
 userorgid = await env.get_userorgid()
-deleted = {"documents": 0, "chunks": 0, "tags": 0, "media_tags": 0, "files": 0}
+deleted = {"documents": 0, "chunks": 0, "tags": 0, "media_tags": 0,
+           "files": 0, "vdb": 0, "graph": 0, "entities": 0}
 
 async with get_sor_context(env, 'rag') as sor:
-    # Check owner
     kb = await sor.sqlExe(
         "SELECT id, name FROM knowledge_bases WHERE id=${id}$ AND (org_id=${org_id}$ OR org_id IS NULL)",
         {"id": kb_id, "org_id": userorgid})
@@ -20,52 +20,78 @@ async with get_sor_context(env, 'rag') as sor:
         return {"widgettype": "urlwidget",
                 "options": {"url": entire_url('/rag/knowledge_bases_list/index.ui')}}
 
-    # Get all doc IDs and file paths for physical cleanup
     docs = await sor.sqlExe(
         "SELECT id, file_path FROM documents WHERE kb_id=${kb_id}$",
         {"kb_id": kb_id})
     doc_ids = [d.id for d in docs]
 
+    # 1. VDB cleanup
     if doc_ids:
-        # Delete chunks
-        await sor.sqlExe(
-            "DELETE FROM document_chunks WHERE doc_id IN (${ids}$)",
+        chunks = await sor.sqlExe(
+            "SELECT vector_id FROM document_chunks WHERE doc_id IN (${ids}$) AND vector_id IS NOT NULL AND vector_id != ''",
             {"ids": doc_ids})
-        deleted["chunks"] = len(doc_ids)
+        vector_ids = [c.vector_id for c in chunks]
+        if vector_ids:
+            try:
+                client = StreamHttpClient()
+                await client.request('POST',
+                    'https://vectordb.opencomputing.net:10443/v1/delete',
+                    json={"colname": kb_id, "ids": vector_ids})
+                deleted["vdb"] = len(vector_ids)
+            except Exception as e:
+                info(f'delete_kb vdb error: {e}')
 
-    # Delete media_tags
-    mt = await sor.sqlExe(
-        "SELECT COUNT(*) AS cnt FROM media_tags WHERE kb_id=${kb_id}$",
-        {"kb_id": kb_id})
-    await sor.sqlExe(
-        "DELETE FROM media_tags WHERE kb_id=${kb_id}$",
-        {"kb_id": kb_id})
+        # 2. Graph DB cleanup
+        try:
+            client2 = StreamHttpClient()
+            await client2.request('POST',
+                'https://graph.opencomputing.net:10443/api/graph/delete',
+                json={"graph": kb_id})
+            deleted["graph"] = 1
+        except Exception as e:
+            info(f'delete_kb graph error: {e}')
+
+        # 3. Entities & relations
+        er = await sor.sqlExe(
+            "SELECT COUNT(*) AS cnt FROM entity_relations WHERE kb_id=${kb_id}$",
+            {"kb_id": kb_id})
+        await sor.sqlExe("DELETE FROM entity_relations WHERE kb_id=${kb_id}$", {"kb_id": kb_id})
+        deleted["entities"] += er[0].cnt if er else 0
+
+        ent = await sor.sqlExe(
+            "SELECT COUNT(*) AS cnt FROM entities WHERE kb_id=${kb_id}$",
+            {"kb_id": kb_id})
+        await sor.sqlExe("DELETE FROM entities WHERE kb_id=${kb_id}$", {"kb_id": kb_id})
+        deleted["entities"] += ent[0].cnt if ent else 0
+
+        # 4. Chunks
+        ch = await sor.sqlExe(
+            "SELECT COUNT(*) AS cnt FROM document_chunks WHERE doc_id IN (${ids}$)",
+            {"ids": doc_ids})
+        await sor.sqlExe("DELETE FROM document_chunks WHERE doc_id IN (${ids}$)", {"ids": doc_ids})
+        deleted["chunks"] = ch[0].cnt if ch else 0
+
+    # Media tags
+    mt = await sor.sqlExe("SELECT COUNT(*) AS cnt FROM media_tags WHERE kb_id=${kb_id}$", {"kb_id": kb_id})
+    await sor.sqlExe("DELETE FROM media_tags WHERE kb_id=${kb_id}$", {"kb_id": kb_id})
     deleted["media_tags"] = mt[0].cnt if mt else 0
 
-    # Delete tags
-    t = await sor.sqlExe(
-        "SELECT COUNT(*) AS cnt FROM tags WHERE kb_id=${kb_id}$",
-        {"kb_id": kb_id})
-    await sor.sqlExe(
-        "DELETE FROM tags WHERE kb_id=${kb_id}$",
-        {"kb_id": kb_id})
+    # Tags
+    t = await sor.sqlExe("SELECT COUNT(*) AS cnt FROM tags WHERE kb_id=${kb_id}$", {"kb_id": kb_id})
+    await sor.sqlExe("DELETE FROM tags WHERE kb_id=${kb_id}$", {"kb_id": kb_id})
     deleted["tags"] = t[0].cnt if t else 0
 
-    # Delete documents
-    await sor.sqlExe(
-        "DELETE FROM documents WHERE kb_id=${kb_id}$",
-        {"kb_id": kb_id})
+    # Documents
+    await sor.sqlExe("DELETE FROM documents WHERE kb_id=${kb_id}$", {"kb_id": kb_id})
     deleted["documents"] = len(doc_ids)
 
-    # Delete the KB itself
-    await sor.sqlExe(
-        "DELETE FROM knowledge_bases WHERE id=${id}$",
-        {"id": kb_id})
+    # KB itself
+    await sor.sqlExe("DELETE FROM knowledge_bases WHERE id=${id}$", {"id": kb_id})
 
-# Delete physical files
+# Physical files — paths are like /44/126/174/61/file.mp4
 for d in docs:
     fp = d.file_path or ''
-    if fp and fp.startswith("/idfile/"):
+    if fp and fp.startswith("/"):
         try:
             real_path = env.realpath(fp)
             if os.path.exists(real_path):
@@ -74,5 +100,6 @@ for d in docs:
         except Exception:
             pass
 
+info(f'delete_kb {kb_id}: {deleted}')
 return {"widgettype": "urlwidget",
         "options": {"url": entire_url('/rag/knowledge_bases_list/index.ui')}}