fix: support multiple keys per action and harden runtime/parsing

tests/event-feed.test.ts

@@ -64,3 +64,30 @@ test("decodeEvent returns null for unrelated or malformed events", () => {
   assert.equal(decodeEvent({ event: "message", data: JSON.stringify({ type: "logData", data: "{}" }) }), null);
   assert.equal(decodeEvent({ event: "message", data: "not json" }), null);
 });
+
+test("decodeEvent returns null when modelStatus data is not an array", () => {
+  const msg: SseMessage = {
+    event: "message",
+    data: JSON.stringify({
+      type: "modelStatus",
+      data: JSON.stringify({ id: "DeepSeek-V4-Flash-0731", state: "ready" }),
+    }),
+  };
+  assert.equal(decodeEvent(msg), null);
+});
+
+test("decodeEvent handles inflight with a non-array requests field and no request field", () => {
+  const msg: SseMessage = {
+    event: "message",
+    data: JSON.stringify({
+      type: "inflight",
+      data: JSON.stringify({ operation: "snapshot", requests: "oops" }),
+    }),
+  };
+  const ev = decodeEvent(msg);
+  assert.ok(ev && ev.type === "inflight");
+  if (ev && ev.type === "inflight") {
+    assert.equal(ev.operation, "snapshot");
+    assert.deepEqual(ev.requests, []);
+  }
+});