before functional changes by Codex

test/basic/mode-and-input.basic.test.js

@@ -33,3 +33,12 @@ test('handleInput ignores disallowed source/action combination', async () => {
 
   assert.equal(before, after);
 });
+
+test('warmingup is treated as active for prediction updates', () => {
+  const machine = new Machine(
+    makeMachineConfig(),
+    makeStateConfig({ state: { current: 'warmingup' } })
+  );
+
+  assert.equal(machine._isOperationalState(), true);
+});