fix(companion): clear disconnect metadata after reconnect

README.md

@@ -1190,7 +1190,7 @@ Methods:
 - `system.capabilities` returns gateway protocol and node policy snapshot.
 
 Companion runtime helper:
-- `src/companion/runtimeClient.ts` provides a typed Node/WebSocket client for companion runtimes (macOS/iOS/Android workers) with wrappers for `node.register`, `node.capabilities.get`, `node.location.set/get`, `node.status.set`, `node.push_token.set`, `system.capabilities`, `system.nodes`, and canvas artifact RPCs (`canvas.put/get/list/delete/clear`), plus convenience helpers (`bootstrapNode`, optional `autoConnect`, `dispose()`, `waitForIdle()` for pending-work drain synchronization) and event helpers (`subscribeEvents()`, `subscribeEvent()`, `subscribeAgentStream()`, `subscribeAgentTyping()`, `subscribeContextWarning()`, `waitForEvent()` with timeout/predicate/abort support plus event-name/timeout validation and deterministic teardown cancellation including socket-close rejection, `waitForAnyEvent()` with event-list/timeout validation, `waitForAgentStream()`, `waitForAgentTyping()`, `waitForContextWarning()`, `clearEventSubscriptions()` returning cleared-subscription/cancelled-wait counts, `cancelPendingEventWaits()` returning cancelled waiter count, `listKnownEventNames()`, `eventSubscriptionCount`) plus in-flight observability via `pendingRequestCount`, `pendingEventWaitCount`, `hasPendingWork`, `idle`, `lastDisconnectCode`, `lastDisconnectReason`, `getPendingWorkSnapshot()`, `getEventSurfaceSnapshot()`, and `getConnectionSnapshot()` (including disconnect metadata).
+- `src/companion/runtimeClient.ts` provides a typed Node/WebSocket client for companion runtimes (macOS/iOS/Android workers) with wrappers for `node.register`, `node.capabilities.get`, `node.location.set/get`, `node.status.set`, `node.push_token.set`, `system.capabilities`, `system.nodes`, and canvas artifact RPCs (`canvas.put/get/list/delete/clear`), plus convenience helpers (`bootstrapNode`, optional `autoConnect`, `dispose()`, `waitForIdle()` for pending-work drain synchronization) and event helpers (`subscribeEvents()`, `subscribeEvent()`, `subscribeAgentStream()`, `subscribeAgentTyping()`, `subscribeContextWarning()`, `waitForEvent()` with timeout/predicate/abort support plus event-name/timeout validation and deterministic teardown cancellation including socket-close rejection, `waitForAnyEvent()` with event-list/timeout validation, `waitForAgentStream()`, `waitForAgentTyping()`, `waitForContextWarning()`, `clearEventSubscriptions()` returning cleared-subscription/cancelled-wait counts, `cancelPendingEventWaits()` returning cancelled waiter count, `listKnownEventNames()`, `eventSubscriptionCount`) plus in-flight observability via `pendingRequestCount`, `pendingEventWaitCount`, `hasPendingWork`, `idle`, `lastDisconnectCode`, `lastDisconnectReason`, `getPendingWorkSnapshot()`, `getEventSurfaceSnapshot()`, and `getConnectionSnapshot()` (including disconnect metadata, cleared on successful reconnect).
 - `src/companion/platformClients.ts` provides platform-focused wrappers:
   - `MacOSCompanionClient` (`platform: "macos"`, APNs push registration)
   - `IOSCompanionClient` (`platform: "ios"`, APNs push registration)

docs/plans/state.json

@@ -1252,6 +1252,19 @@
       ],
       "test_status": "pnpm test:run src/companion/runtimeClient.test.ts src/companion/platformClients.test.ts src/companion/platformClients.integration.test.ts src/companion/heartbeatLoop.test.ts + pnpm typecheck passing"
     },
+    "companion-runtime-reconnect-clears-disconnect-metadata": {
+      "status": "completed",
+      "date": "2026-02-17",
+      "updated": "2026-02-17",
+      "summary": "Cleared stale disconnect metadata on successful reconnect (`connect`) so `lastDisconnectCode`/`lastDisconnectReason` reflect only the latest completed disconnection lifecycle.",
+      "files_modified": [
+        "src/companion/runtimeClient.ts",
+        "src/companion/runtimeClient.test.ts",
+        "README.md",
+        "docs/plans/state.json"
+      ],
+      "test_status": "pnpm test:run src/companion/runtimeClient.test.ts src/companion/platformClients.test.ts src/companion/platformClients.integration.test.ts src/companion/heartbeatLoop.test.ts + pnpm typecheck passing"
+    },
     "browser-tools-activation-clarity": {
       "status": "completed",
       "date": "2026-02-17",
@@ -5050,7 +5063,7 @@
     }
   },
   "overall_progress": {
-    "total_test_count": 1881,
+    "total_test_count": 1882,
     "all_tests_passing": true,
     "p0_completion": "3/3 (100%)",
     "p1_completion": "4/4 (100%)",

src/companion/runtimeClient.test.ts

@@ -886,6 +886,44 @@ describe('CompanionRuntimeClient', () => {
     });
   });
 
+  it('connect clears stale disconnect metadata from prior sessions', async () => {
+    class FakeWebSocket extends EventEmitter {
+      readyState: number = WebSocket.CONNECTING;
+
+      constructor() {
+        super();
+        queueMicrotask(() => {
+          this.readyState = WebSocket.OPEN;
+          this.emit('open');
+        });
+      }
+
+      send(_payload: string, callback?: (error?: Error) => void): void {
+        callback?.();
+      }
+
+      close(code?: number, reason?: string): void {
+        this.readyState = WebSocket.CLOSED;
+        this.emit('close', code ?? 1000, Buffer.from(reason ?? ''));
+      }
+    }
+
+    const client = new CompanionRuntimeClient({
+      url: 'ws://127.0.0.1:1',
+      websocketFactory: () => new FakeWebSocket() as unknown as WebSocket,
+    });
+    await client.connect();
+    client.disconnect(4100, 'manual stop');
+
+    expect(client.lastDisconnectCode).toBe(4100);
+    expect(client.lastDisconnectReason).toBe('manual stop');
+
+    await client.connect();
+
+    expect(client.lastDisconnectCode).toBeUndefined();
+    expect(client.lastDisconnectReason).toBeUndefined();
+  });
+
   it('waitForIdle resolves immediately when no work is pending', async () => {
     const client = new CompanionRuntimeClient({
       url: 'ws://127.0.0.1:1',

src/companion/runtimeClient.ts

@@ -418,6 +418,8 @@ export class CompanionRuntimeClient {
         cleanup();
         settled = true;
         this.ws = ws;
+        this._lastDisconnectCode = undefined;
+        this._lastDisconnectReason = undefined;
         this.ws.on('message', (raw) => this.handleMessage(raw.toString()));
         this.ws.on('close', (code, reason) => {
           if (this.ws === ws) {