From ce49f1ce5c1ade9d4da0d1b8e3cd399d5dc75ccc Mon Sep 17 00:00:00 2001
From: thuanle <tl@thuanle.me>
Date: Wed, 22 Jul 2026 00:20:20 +0700
Subject: [PATCH] Harden step_snap: dedupe Set ids (multi-snap sets)

Local flow verified end-to-end (macOS guards). Remote Ubuntu/Arch
verification deferred to user (interactive, destructive on real hosts).

Co-Authored-By: Claude <noreply@anthropic.com>
---
 cleanup-server | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/cleanup-server b/cleanup-server
index d18733e..aeac2fe 100755
--- a/cleanup-server
+++ b/cleanup-server
@@ -278,7 +278,8 @@ step_snap() {
         return
     fi
     local saved
-    saved=$(sudo snap saved 2>/dev/null | awk 'NR>1{print $1}')
+    # Cột đầu (Set) là id cần forget; một Set có thể có nhiều Snap → dedupe.
+    saved=$(sudo snap saved 2>/dev/null | awk 'NR>1{print $1}' | awk '!seen[$0]++')
     if [ -z "$saved" ]; then
         echo "${C_OK}    ✓ Không có snap snapshot nào.${C_RESET}"
         echo ""