diff --git a/src/app/auth-debug/page.tsx b/src/app/auth-debug/page.tsx
new file mode 100644
index 0000000..7bf624b
--- /dev/null
+++ b/src/app/auth-debug/page.tsx
@@ -0,0 +1,65 @@
+import { cookies } from "next/headers";
+import { createClient } from "@/lib/supabase/server";
+
+export const dynamic = "force-dynamic";
+export const runtime = "nodejs";
+
+export default async function AuthDebugPage() {
+  const cookieStore = await cookies();
+  const allCookies = cookieStore.getAll();
+  const sbCookies = allCookies.filter((c) => c.name.startsWith("sb-"));
+
+  let session: any = null;
+  let user: any = null;
+  let getSessionError: string | null = null;
+  let getUserError: string | null = null;
+
+  try {
+    const supabase = await createClient();
+    const sessRes = await supabase.auth.getSession();
+    session = sessRes.data?.session;
+    if (sessRes.error) getSessionError = sessRes.error.message;
+    const userRes = await supabase.auth.getUser();
+    user = userRes.data?.user;
+    if (userRes.error) getUserError = userRes.error.message;
+  } catch (e: any) {
+    getSessionError = e?.message || String(e);
+  }
+
+  return (
+    <pre style={{ padding: 20, fontFamily: "monospace", whiteSpace: "pre-wrap", background: "#111", color: "#ddd", minHeight: "100vh" }}>
+{JSON.stringify(
+  {
+    note: "Server-side view of auth state for the request that loaded this page.",
+    cookies_total: allCookies.length,
+    sb_cookies: sbCookies.map((c) => ({ name: c.name, value_prefix: c.value.slice(0, 40) + (c.value.length > 40 ? "…" : "") })),
+    other_cookie_names: allCookies.filter((c) => !c.name.startsWith("sb-")).map((c) => c.name),
+    auth_getSession_error: getSessionError,
+    auth_getUser_error: getUserError,
+    has_session: !!session,
+    session: session
+      ? {
+          access_token_len: session.access_token?.length,
+          refresh_token_len: session.refresh_token?.length,
+          expires_in: session.expires_in,
+          expires_at: session.expires_at,
+          token_type: session.token_type,
+          user_id: session.user?.id,
+          user_email: session.user?.email,
+        }
+      : null,
+    user: user
+      ? {
+          id: user.id,
+          email: user.email,
+          aud: user.aud,
+          role: user.role,
+        }
+      : null,
+  },
+  null,
+  2,
+)}
+    </pre>
+  );
+}