From 34b78c0e16086b9d38caa5c44c7127d1a344951a Mon Sep 17 00:00:00 2001
From: Ming Wen <moonbingbing@gmail.com>
Date: Mon, 13 Jul 2026 16:16:38 +0800
Subject: [PATCH] fix(install.sh): guard rm -rf with ${SKILLS_DIR:?}
 (shellcheck SC2115)

Defense-in-depth against an empty SKILLS_DIR expanding to a root-level path.
Empty values are already rejected upstream; this makes it impossible by
construction. One-char change, behavior otherwise identical.
---
 install.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/install.sh b/install.sh
index add0ce4..a8c5b13 100755
--- a/install.sh
+++ b/install.sh
@@ -67,7 +67,7 @@ count=0
 for dir in "$SRC"/*/; do
   [ -f "${dir}SKILL.md" ] || continue
   name="$(basename "$dir")"
-  rm -rf "${SKILLS_DIR}/${name}"
+  rm -rf "${SKILLS_DIR:?}/${name}"
   cp -R "$dir" "${SKILLS_DIR}/${name}"
   count=$((count + 1))
 done