diff --git a/plugins/memory/openviking/__init__.py b/plugins/memory/openviking/__init__.py
index f46d71321..1777d423b 100644
--- a/plugins/memory/openviking/__init__.py
+++ b/plugins/memory/openviking/__init__.py
@@ -509,19 +509,24 @@ class OpenVikingMemoryProvider(MemoryProvider):
         result = resp.get("result", {})
 
         # Format results for the model — keep it concise
-        formatted = []
+        scored_entries = []
         for ctx_type in ("memories", "resources", "skills"):
             items = result.get(ctx_type, [])
             for item in items:
+                raw_score = item.get("score")
+                sort_score = raw_score if raw_score is not None else 0.0
                 entry = {
                     "uri": item.get("uri", ""),
                     "type": ctx_type.rstrip("s"),
-                    "score": round(item.get("score", 0), 3),
+                    "score": round(raw_score, 3) if raw_score is not None else 0.0,
                     "abstract": item.get("abstract", ""),
                 }
                 if item.get("relations"):
                     entry["related"] = [r.get("uri") for r in item["relations"][:3]]
-                formatted.append(entry)
+                scored_entries.append((sort_score, entry))
+
+        scored_entries.sort(key=lambda x: x[0], reverse=True)
+        formatted = [entry for _, entry in scored_entries]
 
         return json.dumps({
             "results": formatted,
diff --git a/tests/plugins/memory/test_openviking_provider.py b/tests/plugins/memory/test_openviking_provider.py
new file mode 100644
index 000000000..c2408f0ae
--- /dev/null
+++ b/tests/plugins/memory/test_openviking_provider.py
@@ -0,0 +1,62 @@
+import json
+from unittest.mock import MagicMock
+
+from plugins.memory.openviking import OpenVikingMemoryProvider
+
+
+def test_tool_search_sorts_by_raw_score_across_buckets():
+    provider = OpenVikingMemoryProvider()
+    provider._client = MagicMock()
+    provider._client.post.return_value = {
+        "result": {
+            "memories": [
+                {"uri": "viking://memories/1", "score": 0.9003, "abstract": "memory result"},
+            ],
+            "resources": [
+                {"uri": "viking://resources/1", "score": 0.9004, "abstract": "resource result"},
+            ],
+            "skills": [
+                {"uri": "viking://skills/1", "score": 0.8999, "abstract": "skill result"},
+            ],
+            "total": 3,
+        }
+    }
+
+    result = json.loads(provider._tool_search({"query": "ranking"}))
+
+    assert [entry["uri"] for entry in result["results"]] == [
+        "viking://resources/1",
+        "viking://memories/1",
+        "viking://skills/1",
+    ]
+    assert [entry["score"] for entry in result["results"]] == [0.9, 0.9, 0.9]
+    assert result["total"] == 3
+
+
+def test_tool_search_sorts_missing_raw_score_after_negative_scores():
+    provider = OpenVikingMemoryProvider()
+    provider._client = MagicMock()
+    provider._client.post.return_value = {
+        "result": {
+            "memories": [
+                {"uri": "viking://memories/missing", "abstract": "missing score"},
+            ],
+            "resources": [
+                {"uri": "viking://resources/negative", "score": -0.25, "abstract": "negative score"},
+            ],
+            "skills": [
+                {"uri": "viking://skills/positive", "score": 0.1, "abstract": "positive score"},
+            ],
+            "total": 3,
+        }
+    }
+
+    result = json.loads(provider._tool_search({"query": "ranking"}))
+
+    assert [entry["uri"] for entry in result["results"]] == [
+        "viking://skills/positive",
+        "viking://memories/missing",
+        "viking://resources/negative",
+    ]
+    assert [entry["score"] for entry in result["results"]] == [0.1, 0.0, -0.25]
+    assert result["total"] == 3