diff --git a/extensions/lobster/src/lobster-taskflow.ts b/extensions/lobster/src/lobster-taskflow.ts
index 1dfd2f8e488..04c7e62a854 100644
--- a/extensions/lobster/src/lobster-taskflow.ts
+++ b/extensions/lobster/src/lobster-taskflow.ts
@@ -101,6 +101,8 @@ function toJsonLike(value: unknown, seen = new WeakSet<object>()): JsonLike {
       seen.delete(value);
       return jsonObject;
     }
+    default:
+      return null;
   }
   return null;
 }
diff --git a/src/agents/tools/video-generate-tool.test.ts b/src/agents/tools/video-generate-tool.test.ts
index fb33305ade9..9608d1535c2 100644
--- a/src/agents/tools/video-generate-tool.test.ts
+++ b/src/agents/tools/video-generate-tool.test.ts
@@ -147,6 +147,7 @@ describe("createVideoGenerateTool", () => {
       provider: "qwen",
       model: "wan2.6-t2v",
       attempts: [],
+      ignoredOverrides: [],
       videos: [
         {
           buffer: Buffer.from("video-bytes"),