From 405c8b3f938e3bc5b1eec9501d2ba203734c8253 Mon Sep 17 00:00:00 2001
From: Jeffrey Alan Scudder <me@jas.life>
Date: Mon, 23 Mar 2026 19:47:23 -0700
Subject: [PATCH] oven: expose os-image layout headers to browser

---
 oven/server.mjs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/oven/server.mjs b/oven/server.mjs
index b414a4fdc1..131f420b36 100644
--- a/oven/server.mjs
+++ b/oven/server.mjs
@@ -359,6 +359,10 @@ app.use((req, res, next) => {
   res.setHeader('Access-Control-Allow-Origin', '*');
   res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
   res.setHeader('Access-Control-Allow-Headers', 'Content-Type, Authorization');
+  res.setHeader(
+    'Access-Control-Expose-Headers',
+    'Content-Length, Content-Disposition, X-AC-OS-Requested-Layout, X-AC-OS-Layout, X-AC-OS-Fallback, X-AC-OS-Fallback-Reason',
+  );
   if (req.method === 'OPTIONS') {
     return res.sendStatus(200);
   }
-- 
2.51.2