test(companion): cover pending event wait count lifecycle

docs/plans/state.json

@@ -873,6 +873,18 @@
       ],
       "test_status": "pnpm test:run src/companion/runtimeClient.test.ts src/companion/platformClients.test.ts src/companion/heartbeatLoop.test.ts src/companion/platformClients.integration.test.ts + pnpm typecheck passing"
     },
+    "companion-pending-event-wait-count-lifecycle-coverage": {
+      "status": "completed",
+      "date": "2026-02-17",
+      "updated": "2026-02-17",
+      "summary": "Added lifecycle coverage for `pendingEventWaitCount` across runtime and platform wait flows, including `waitForAnyEvent()` increment/decrement and clear-subscription rejection teardown.",
+      "files_modified": [
+        "src/companion/runtimeClient.test.ts",
+        "src/companion/platformClients.integration.test.ts",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run src/companion/runtimeClient.test.ts src/companion/platformClients.test.ts src/companion/heartbeatLoop.test.ts src/companion/platformClients.integration.test.ts + pnpm typecheck passing"
+    },
     "browser-tools-activation-clarity": {
       "status": "completed",
       "date": "2026-02-17",

src/companion/platformClients.integration.test.ts

@@ -131,6 +131,25 @@ describe('platform clients integration', () => {
     expect(client.eventSubscriptionCount).toBe(0);
   });
 
+  it('platform pendingEventWaitCount tracks waitForAnyEvent lifecycle', async () => {
+    if (!LISTEN_ALLOWED) {
+      return;
+    }
+
+    const runtime = createRuntime();
+    const client = new IOSCompanionClient({ runtime, nodeId: 'ios-wait-count-e2e' });
+
+    expect(client.pendingEventWaitCount).toBe(0);
+    const awaited = expect(
+      client.waitForAnyEvent(['agent.stream'], { timeoutMs: 10_000 }),
+    ).rejects.toThrow('Event subscriptions cleared');
+    expect(client.pendingEventWaitCount).toBe(1);
+
+    client.clearEventSubscriptions();
+    await awaited;
+    expect(client.pendingEventWaitCount).toBe(0);
+  });
+
   it('platform connected reflects runtime connection lifecycle', async () => {
     if (!LISTEN_ALLOWED) {
       return;

src/companion/runtimeClient.test.ts

@@ -528,10 +528,12 @@ describe('CompanionRuntimeClient', () => {
     const client = new CompanionRuntimeClient({
       url: 'ws://127.0.0.1:1',
     });
+    expect(client.pendingEventWaitCount).toBe(0);
     const awaited = client.waitForAnyEvent<{ active?: boolean; token?: string }>(
       ['agent.typing', 'agent.stream'],
       { timeoutMs: 2000 },
     );
+    expect(client.pendingEventWaitCount).toBe(1);
 
     (client as unknown as { handleMessage: (raw: string) => void }).handleMessage(
       JSON.stringify({
@@ -545,6 +547,7 @@ describe('CompanionRuntimeClient', () => {
       event: 'agent.typing',
       data: { active: true },
     });
+    expect(client.pendingEventWaitCount).toBe(0);
   });
 
   it('waitForAnyEvent supports per-event predicate filtering', async () => {