From cacef68313d6636d089d652625452a885751ab38 Mon Sep 17 00:00:00 2001
From: imjlk <i@m.junglei.kim>
Date: Mon, 20 Jul 2026 10:39:29 +0900
Subject: [PATCH] fix(ait): fail closed on missing Game Center support

---
 .../ait-host-game-center-support.md           |  7 ++++
 adapters/ait/src/host.test.ts                 | 36 +++++++++++++++++++
 adapters/ait/src/host.ts                      |  6 +++-
 3 files changed, 48 insertions(+), 1 deletion(-)
 create mode 100644 .sampo/changesets/ait-host-game-center-support.md

diff --git a/.sampo/changesets/ait-host-game-center-support.md b/.sampo/changesets/ait-host-game-center-support.md
new file mode 100644
index 00000000..d612f1e2
--- /dev/null
+++ b/.sampo/changesets/ait-host-game-center-support.md
@@ -0,0 +1,7 @@
+---
+npm/@mpgd/adapter-ait: patch (Fixed)
+---
+
+Treat a missing Apps in Toss operational-environment support constant as an unsupported Game
+Center capability instead of failing wrapper startup. Leaderboard submission and opening remain
+disabled until the host can verify the minimum native version.
diff --git a/adapters/ait/src/host.test.ts b/adapters/ait/src/host.test.ts
index 4e119989..d9679223 100644
--- a/adapters/ait/src/host.test.ts
+++ b/adapters/ait/src/host.test.ts
@@ -810,6 +810,42 @@ describe('AIT production host bridge', () => {
     expect(showCount).toBe(1);
   });
 
+  it('treats a missing Game Center environment constant as unsupported', async () => {
+    const diagnostic = vi.spyOn(console, 'debug').mockImplementation(() => {});
+    const submitScore = vi.fn(async () => ({ statusCode: 'SUCCESS' as const }));
+    const openLeaderboard = vi.fn(async () => {});
+
+    try {
+      const bridge = createAitHostBridge({
+        dependencies: createDependencies({
+          isMinVersionSupported: () => {
+            throw new Error('getOperationalEnvironment is not a constant handler');
+          },
+          submitGameCenterLeaderBoardScore: submitScore,
+          openGameCenterLeaderboard: openLeaderboard,
+        }),
+      });
+
+      await expect(request(bridge, 'runtime.getCapabilities', {})).resolves.toMatchObject({
+        nativeLeaderboard: false,
+      });
+      await expect(request(bridge, 'leaderboard.submitScore', { score: 42 })).resolves.toEqual({
+        submitted: false,
+      });
+      await expect(request(bridge, 'leaderboard.open', {})).resolves.toEqual({});
+      expect(submitScore).not.toHaveBeenCalled();
+      expect(openLeaderboard).not.toHaveBeenCalled();
+      expect(diagnostic).toHaveBeenCalledWith(
+        'AIT capability support check failed; disabling the feature.',
+        expect.objectContaining({
+          message: 'getOperationalEnvironment is not a constant handler',
+        }),
+      );
+    } finally {
+      diagnostic.mockRestore();
+    }
+  });
+
   it('delegates supported Game Center score submission and opening', async () => {
     const submittedScores: string[] = [];
     let openCount = 0;
diff --git a/adapters/ait/src/host.ts b/adapters/ait/src/host.ts
index 64d1f8e8..68098543 100644
--- a/adapters/ait/src/host.ts
+++ b/adapters/ait/src/host.ts
@@ -922,7 +922,11 @@ function toAitDeepLink(input: string, appName: string): string | undefined {
 }
 
 function isGameCenterSupported(dependencies: AitHostDependencies): boolean {
-  return dependencies.isMinVersionSupported({ android: '5.221.0', ios: '5.221.0' });
+  return isCapabilitySupported(() =>
+    dependencies.isMinVersionSupported({
+      android: '5.221.0',
+      ios: '5.221.0',
+    }));
 }
 
 function areFullScreenAdsSupported(dependencies: AitHostDependencies): boolean {