fix: automated commit detection

ref: N25B-241

.githooks/check-commit-msg.sh

@@ -23,6 +23,37 @@ NC='\033[0m' # No Color
 # The first argument to the hook is the path to the file containing the commit message
 COMMIT_MSG_FILE=$1
 
+# --- Automated Commit Detection ---
+
+# Git directory (.git/)
+GIT_DIR=$(git rev-parse --git-dir)
+# Check for a merge commit
+if [ -f "$GIT_DIR/MERGE_HEAD" ]; then
+  echo "Hook: Detected a merge commit."
+  # Ensure the message follows a 'Merge branch...' pattern.
+  first_line=$(head -n1 "$COMMIT_MSG_FILE")
+  if [[ ! "$first_line" =~ ^Merge.* ]]; then
+    echo "Error: Merge commit message should start with 'Merge'." >&2
+    exit 1
+  fi
+  exit 0
+
+# Check for a squash commit (from git merge --squash)
+elif [ -f "$GIT_DIR/SQUASH_MSG" ]; then
+  echo "Hook: Detected a squash commit. Skipping validation."
+  exit 0
+
+# Check for a revert commit
+elif [ -f "$GIT_DIR/REVERT_HEAD" ]; then
+  echo "Hook: Detected a revert commit. Skipping validation."
+  exit 0
+
+# Check for a cherry-pick commit
+elif [ -f "$GIT_DIR/CHERRY_PICK_HEAD" ]; then
+  echo "Hook: Detected a cherry-pick commit. Skipping validation."
+  exit 0
+fi
+
 # --- Validation Functions ---
 
 # Function to print an error message and exit