From 257d14f60b7a3b697cb6ee9bca18a2de2d6b27ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E2=80=9CKangShinGyu=E2=80=9D?= <“rkdtlseb@naver.com”>
Date: Tue, 6 Oct 2026 14:09:14 +0900
Subject: [PATCH] =?UTF-8?q?hotfitx(join):=EC=B9=B4=ED=86=A1=EC=97=90?=
 =?UTF-8?q?=EC=84=9C=20=EC=B4=88=EB=8C=80=EC=8B=9C=20=EB=B9=88=20=ED=99=94?=
 =?UTF-8?q?=EB=A9=B4=20=EC=98=A4=EB=A5=98?=
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---
 src/proxy.test.ts | 17 ++++++++++++++++-
 src/proxy.ts      |  2 +-
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/src/proxy.test.ts b/src/proxy.test.ts
index 05ea7925..e68b793c 100644
--- a/src/proxy.test.ts
+++ b/src/proxy.test.ts
@@ -33,13 +33,15 @@ describe("invite preview proxy indexing contract", () => {
   it.each([
     "Discordbot/2.0",
     "KAKAOTALK-SCRAP/1.0",
+    "facebookexternalhit/1.1; kakaotalk-scrap/1.0; +https://devtalk.kakao.com/t/scrap/33984",
     "Slackbot-LinkExpanding 1.0 (+https://api.slack.com/robots)",
     "facebookexternalhit/1.1",
     "Twitterbot/1.0",
     "LinkedInBot/1.0",
     "TelegramBot (like TwitterBot)",
     "WhatsApp/2.23",
-    "Line/13.0",
+    "line-poker/1.0",
+    "facebookexternalhit/1.1;line-poker/1.0",
   ])("rewrites supported social preview UA %s with noindex headers", async (ua) => {
     const response = await proxy(inviteRequest(ua));
 
@@ -62,6 +64,19 @@ describe("invite preview proxy indexing contract", () => {
     expect(response.headers.get("x-middleware-next")).toBe("1");
     expect(verifySessionWithOptionalRefresh).toHaveBeenCalledOnce();
   });
+
+  it.each([
+    "Mozilla/5.0 (iPhone; CPU iPhone OS 17_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 KAKAOTALK 10.8.0",
+    "Mozilla/5.0 (Linux; Android 14; SM-S918N Build/UP1A.231005.007; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/124.0.6367.82 Mobile Safari/537.36;KAKAOTALK 2410800",
+    "Mozilla/5.0 (iPhone; CPU iPhone OS 17_5 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Mobile/15E148 Safari Line/14.8.0",
+    "Mozilla/5.0 (Linux; Android 14; SM-S918N Build/UP1A.231005.007; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/124.0.6367.82 Mobile Safari/537.36 Line/14.8.0/IAB",
+  ])("serves the app page to in-app browser UA %s", async (ua) => {
+    const response = await proxy(inviteRequest(ua));
+
+    expect(response.headers.get("x-middleware-rewrite")).toBeNull();
+    expect(response.headers.get("x-middleware-next")).toBe("1");
+    expect(verifySessionWithOptionalRefresh).toHaveBeenCalledOnce();
+  });
 });
 
 describe("protected route redirect indexing contract", () => {
diff --git a/src/proxy.ts b/src/proxy.ts
index a5113a52..902ef09e 100644
--- a/src/proxy.ts
+++ b/src/proxy.ts
@@ -7,7 +7,7 @@ import { verifySessionWithOptionalRefresh } from "@/lib/auth-server";
 import { isProtectedAppPath } from "@/lib/auth-session";
 
 const LINK_PREVIEW_BOT_UA =
-  /facebookexternalhit|kakaotalk|twitterbot|slackbot|discordbot|linkedinbot|telegrambot|whatsapp|(?:^|[\s;(])line(?:\/|[\s;)])/i;
+  /facebookexternalhit|kakaotalk-scrap|line-poker|twitterbot|slackbot|discordbot|linkedinbot|telegrambot|whatsapp/i;
 
 function isInvitePreviewRequest(request: NextRequest): boolean {
   const { pathname } = request.nextUrl;