diff --git a/frontend.go b/frontend.go
index daabfc0..316e4c2 100644
--- a/frontend.go
+++ b/frontend.go
@@ -67,6 +67,7 @@ var knownNonProtoFetches = map[string]bool{
 	"/api/ai/chat/stream":  true, // AI chat SSE streaming (EventSource/fetch — ConnectRPC doesn't support SSE)
 	"/api/support/":        true, // CMS helpdesk widget: multipart attachment upload to the Chi proxy — connect-query can't send FormData
 	"/api/helpdesk/upload": true, // Orchestrator helpdesk: multipart attachment upload — same FormData limitation
+	"/.well-known/skills/": true, // Public well-known skill discovery index (instance-derived skill name) — no proto service
 }
 
 var (