feat(companion): add waitForAnyEvent runtime helper

src/companion/runtimeClient.test.ts

@@ -416,6 +416,72 @@ describe('CompanionRuntimeClient', () => {
     await expect(awaited).resolves.toEqual({ thresholdPct: 75, estimatedPct: 88 });
   });
 
+  it('waitForAnyEvent resolves with event envelope for first matching event', async () => {
+    const client = new CompanionRuntimeClient({
+      url: 'ws://127.0.0.1:1',
+    });
+    const awaited = client.waitForAnyEvent<{ active?: boolean; token?: string }>(
+      ['agent.typing', 'agent.stream'],
+      { timeoutMs: 2000 },
+    );
+
+    (client as unknown as { handleMessage: (raw: string) => void }).handleMessage(
+      JSON.stringify({
+        id: 58,
+        event: 'agent.typing',
+        data: { active: true },
+      }),
+    );
+
+    await expect(awaited).resolves.toEqual({
+      event: 'agent.typing',
+      data: { active: true },
+    });
+  });
+
+  it('waitForAnyEvent supports per-event predicate filtering', async () => {
+    const client = new CompanionRuntimeClient({
+      url: 'ws://127.0.0.1:1',
+    });
+    const awaited = client.waitForAnyEvent<{ token?: string }>(
+      ['agent.stream'],
+      {
+        timeoutMs: 2000,
+        predicate: (_event, data) => data.token === 'accept',
+      },
+    );
+
+    (client as unknown as { handleMessage: (raw: string) => void }).handleMessage(
+      JSON.stringify({
+        id: 59,
+        event: 'agent.stream',
+        data: { token: 'skip' },
+      }),
+    );
+    (client as unknown as { handleMessage: (raw: string) => void }).handleMessage(
+      JSON.stringify({
+        id: 60,
+        event: 'agent.stream',
+        data: { token: 'accept' },
+      }),
+    );
+
+    await expect(awaited).resolves.toEqual({
+      event: 'agent.stream',
+      data: { token: 'accept' },
+    });
+  });
+
+  it('waitForAnyEvent validates input event list', () => {
+    const client = new CompanionRuntimeClient({
+      url: 'ws://127.0.0.1:1',
+    });
+
+    expect(() => client.waitForAnyEvent([])).toThrow(
+      'eventNames must contain at least one event name',
+    );
+  });
+
   it('connects and performs node registration + capability discovery', async () => {
     if (!LISTEN_ALLOWED) {
       return;