diff --git a/tests/runtime-flow.test.ts b/tests/runtime-flow.test.ts
index 0e6324d..3dc2a3e 100644
--- a/tests/runtime-flow.test.ts
+++ b/tests/runtime-flow.test.ts
@@ -479,4 +479,114 @@ describe("Yonexus.Client runtime flow", () => {
     expect(runtime.state.pendingPairing).toBeDefined();
     expect(runtime.state.lastPairingFailure).toBe("invalid_code");
   });
+
+  it("PF-10: restart during pending pairing resumes waiting for out-of-band code", async () => {
+    const now = 1_710_000_000;
+    const storeState = createMockStateStore({
+      identifier: "client-a",
+      updatedAt: now
+    });
+
+    const firstTransportState = createMockTransport();
+    const firstRuntime = createYonexusClientRuntime({
+      config: {
+        mainHost: "ws://localhost:8787",
+        identifier: "client-a",
+        notifyBotToken: "stub-token",
+        adminUserId: "admin-user"
+      },
+      transport: firstTransportState.transport,
+      stateStore: storeState.store,
+      now: () => now
+    });
+
+    await firstRuntime.start();
+    firstRuntime.handleTransportStateChange("connected");
+    await firstRuntime.handleMessage(
+      encodeBuiltin(
+        buildPairRequest(
+          {
+            identifier: "client-a",
+            expiresAt: now + 300,
+            ttlSeconds: 300,
+            adminNotification: "sent",
+            codeDelivery: "out_of_band"
+          },
+          { requestId: "req-pair", timestamp: now }
+        )
+      )
+    );
+
+    expect(firstRuntime.state.phase).toBe("waiting_pair_confirm");
+    expect(firstRuntime.state.pendingPairing).toMatchObject({
+      expiresAt: now + 300,
+      ttlSeconds: 300,
+      adminNotification: "sent"
+    });
+
+    await firstRuntime.stop();
+
+    const secondTransportState = createMockTransport();
+    const secondRuntime = createYonexusClientRuntime({
+      config: {
+        mainHost: "ws://localhost:8787",
+        identifier: "client-a",
+        notifyBotToken: "stub-token",
+        adminUserId: "admin-user"
+      },
+      transport: secondTransportState.transport,
+      stateStore: storeState.store,
+      now: () => now + 5
+    });
+
+    await secondRuntime.start();
+    secondRuntime.handleTransportStateChange("connected");
+
+    const hello = decodeBuiltin(secondTransportState.sent[0]);
+    expect(hello.type).toBe("hello");
+    expect(hello.payload).toMatchObject({
+      identifier: "client-a",
+      hasSecret: false,
+      hasKeyPair: true
+    });
+
+    await secondRuntime.handleMessage(
+      encodeBuiltin(
+        buildHelloAck(
+          {
+            identifier: "client-a",
+            nextAction: "waiting_pair_confirm"
+          },
+          { requestId: "req-hello-resume", timestamp: now + 5 }
+        )
+      )
+    );
+
+    await secondRuntime.handleMessage(
+      encodeBuiltin(
+        buildPairRequest(
+          {
+            identifier: "client-a",
+            expiresAt: now + 300,
+            ttlSeconds: 295,
+            adminNotification: "sent",
+            codeDelivery: "out_of_band"
+          },
+          { requestId: "req-pair-resume", timestamp: now + 5 }
+        )
+      )
+    );
+
+    expect(secondRuntime.state.phase).toBe("waiting_pair_confirm");
+    expect(secondRuntime.state.pendingPairing).toMatchObject({
+      expiresAt: now + 300,
+      ttlSeconds: 295,
+      adminNotification: "sent"
+    });
+    expect(secondRuntime.submitPairingCode("PAIR-CODE-123", "req-pair-resume")).toBe(true);
+
+    const pairConfirm = decodeBuiltin(secondTransportState.sent.at(-1)!);
+    expect(pairConfirm.type).toBe("pair_confirm");
+    expect((pairConfirm.payload as PairConfirmPayload).pairingCode).toBe("PAIR-CODE-123");
+  });
 });