diff --git a/retrieval/retriever.js b/retrieval/retriever.js
index 5af1a98..023e2ea 100644
--- a/retrieval/retriever.js
+++ b/retrieval/retriever.js
@@ -2552,7 +2552,10 @@ function buildResult(graph, selectedNodeIds, schema, meta = {}) {
   const selectedSet = new Set(uniqueNodeIds(selectedNodeIds));
   const scopeContext = meta.scopeContext || {};
   const compareForResult = compareNodeRecallOrderWithContext(graph, scopeContext);
-  const summaryEntries = getActiveSummaryEntries(graph);
+  const summaryEntries =
+    typeof getActiveSummaryEntries === "function"
+      ? getActiveSummaryEntries(graph)
+      : [];
 
   // 常驻注入节点（alwaysInject=true 的类型）
   const alwaysInjectTypes = new Set(
diff --git a/tests/scoped-memory.mjs b/tests/scoped-memory.mjs
index ab3108f..519dd50 100644
--- a/tests/scoped-memory.mjs
+++ b/tests/scoped-memory.mjs
@@ -79,10 +79,11 @@ const legacyGraph = deserializeGraph({
   edges: [],
 });
 assert.equal(legacyGraph.nodes[0]?.scope?.layer, "objective");
-assert.equal(legacyGraph.version, 8);
+assert.equal(legacyGraph.version, 9);
 assert.equal(legacyGraph.knowledgeState?.version, 1);
 assert.equal(legacyGraph.regionState?.version, 1);
 assert.equal(legacyGraph.timelineState?.version, 1);
+assert.equal(legacyGraph.summaryState?.version, 1);
 assert.equal(legacyGraph.historyState?.activeRegionSource, "");
 assert.equal(legacyGraph.historyState?.activeStorySegmentId, "");
 assert.equal(legacyGraph.historyState?.activeStoryTimeLabel, "");