diff --git a/apps/web/src/app/tui.json/route.ts b/apps/web/src/app/tui.json/route.ts
new file mode 100644
index 000000000..db74ef18e
--- /dev/null
+++ b/apps/web/src/app/tui.json/route.ts
@@ -0,0 +1,30 @@
+import { NextResponse } from 'next/server';
+
+/**
+ * Serves the Kilo CLI TUI config JSON Schema at `app.kilo.ai/tui.json`.
+ *
+ * Proxies the upstream opencode schema. Cached at the CDN edge for 1 hour
+ * with stale-while-revalidate, so the actual upstream fetch happens at most
+ * once per hour per region.
+ */
+
+const UPSTREAM = 'https://opencode.ai/tui.json';
+const CACHE_SECONDS = 60 * 60; // 1 hour
+
+export async function GET() {
+  const res = await fetch(UPSTREAM, { next: { revalidate: CACHE_SECONDS } });
+  if (!res.ok) {
+    return NextResponse.json(
+      { error: `upstream ${UPSTREAM} returned ${res.status}` },
+      { status: 502 }
+    );
+  }
+  const schema = await res.json();
+
+  return NextResponse.json(schema, {
+    headers: {
+      'cache-control': `public, max-age=0, s-maxage=${CACHE_SECONDS}, stale-while-revalidate=${CACHE_SECONDS}`,
+      'access-control-allow-origin': '*',
+    },
+  });
+}