diff --git a/extensions/memory-lancedb/index.test.ts b/extensions/memory-lancedb/index.test.ts
index 712e87c8f6c..7b9465bbd50 100644
--- a/extensions/memory-lancedb/index.test.ts
+++ b/extensions/memory-lancedb/index.test.ts
@@ -165,6 +165,42 @@ describe("memory plugin e2e", () => {
     expect(config?.autoRecall).toBe(true);
   });
 
+  test("registers auto-recall on before_prompt_build instead of the legacy hook", async () => {
+    const on = vi.fn();
+    const mockApi = {
+      id: "memory-lancedb",
+      name: "Memory (LanceDB)",
+      source: "test",
+      config: {},
+      pluginConfig: {
+        embedding: {
+          apiKey: OPENAI_API_KEY,
+          model: "text-embedding-3-small",
+        },
+        dbPath: getDbPath(),
+        autoCapture: false,
+        autoRecall: true,
+      },
+      runtime: {},
+      logger: {
+        info: vi.fn(),
+        warn: vi.fn(),
+        error: vi.fn(),
+        debug: vi.fn(),
+      },
+      registerTool: vi.fn(),
+      registerCli: vi.fn(),
+      registerService: vi.fn(),
+      on,
+      resolvePath: (filePath: string) => filePath,
+    };
+
+    memoryPlugin.register(mockApi as any);
+
+    expect(on).toHaveBeenCalledWith("before_prompt_build", expect.any(Function));
+    expect(on).not.toHaveBeenCalledWith("before_agent_start", expect.any(Function));
+  });
+
   test("passes configured dimensions to OpenAI embeddings API", async () => {
     const embeddingsCreate = vi.fn(async () => ({
       data: [{ embedding: [0.1, 0.2, 0.3] }],
diff --git a/extensions/memory-lancedb/index.ts b/extensions/memory-lancedb/index.ts
index 82fac0fd7b1..bfe508fc90d 100644
--- a/extensions/memory-lancedb/index.ts
+++ b/extensions/memory-lancedb/index.ts
@@ -40,8 +40,6 @@ type MemorySearchResult = {
   score: number;
 };
 
-type LegacyBeforeAgentStartContext = { prependContext: string } | undefined;
-
 // ============================================================================
 // LanceDB Provider
 // ============================================================================
@@ -541,9 +539,9 @@ export default definePluginEntry({
     // Lifecycle Hooks
     // ========================================================================
 
-    // Auto-recall: inject relevant memories before agent starts
+    // Auto-recall: inject relevant memories during prompt build
     if (cfg.autoRecall) {
-      api.on("before_agent_start", async (event): Promise<LegacyBeforeAgentStartContext> => {
+      api.on("before_prompt_build", async (event) => {
         if (!event.prompt || event.prompt.length < 5) {
           return undefined;
         }