Update active dev checkout with system

bin/omarchy-update-available

@@ -1,9 +1,25 @@
 #!/bin/bash
 
-# omarchy:summary=Check whether Omarchy package updates are available.
+# omarchy:summary=Check whether Omarchy updates are available.
 
 set -euo pipefail
 
+updates=()
+
+if [[ $OMARCHY_PATH != "/usr/share/omarchy" ]]; then
+  upstream=$(git -C "$OMARCHY_PATH" rev-parse --abbrev-ref --symbolic-full-name '@{upstream}' 2>/dev/null || true)
+  if [[ -n $upstream ]]; then
+    GIT_TERMINAL_PROMPT=0 timeout 10 git -C "$OMARCHY_PATH" fetch --quiet 2>/dev/null || true
+
+    behind=$(git -C "$OMARCHY_PATH" rev-list --count "HEAD..$upstream" 2>/dev/null || echo 0)
+    if (( behind > 0 )); then
+      commit_label=commits
+      (( behind == 1 )) && commit_label=commit
+      updates+=("omarchy-dev-checkout $behind new $commit_label on $upstream")
+    fi
+  fi
+fi
+
 package=""
 if pacman -Qq omarchy-dev >/dev/null 2>&1; then
   package=omarchy-dev
@@ -16,7 +32,11 @@ if [[ -n $package ]]; then
 fi
 
 if [[ -n ${update:-} ]]; then
-  printf '%s\n' "$update"
+  updates+=("$update")
+fi
+
+if (( ${#updates[@]} > 0 )); then
+  printf '%s\n' "${updates[@]}"
   exit 0
 else
   echo "Omarchy is up to date"