diff --git a/skills/minio-upload/scripts/upload_to_obsidian.sh b/skills/minio-upload/scripts/upload_to_obsidian.sh
index 8514d83..e097bd7 100755
--- a/skills/minio-upload/scripts/upload_to_obsidian.sh
+++ b/skills/minio-upload/scripts/upload_to_obsidian.sh
@@ -67,6 +67,19 @@ while [[ $# -gt 0 ]]; do
     esac
 done
 
+# Validate mutual exclusion of conflict handling options
+CONFLICT_OPTS_COUNT=0
+[ "$FORCE" = true ] && CONFLICT_OPTS_COUNT=$((CONFLICT_OPTS_COUNT + 1))
+[ "$SKIP" = true ] && CONFLICT_OPTS_COUNT=$((CONFLICT_OPTS_COUNT + 1))
+[ "$BACKUP" = true ] && CONFLICT_OPTS_COUNT=$((CONFLICT_OPTS_COUNT + 1))
+[ "$RENAME" = true ] && CONFLICT_OPTS_COUNT=$((CONFLICT_OPTS_COUNT + 1))
+
+if [ $CONFLICT_OPTS_COUNT -gt 1 ]; then
+    echo "Error: Conflict handling options are mutually exclusive." >&2
+    echo "Use only one of: --force, --skip, --backup, --rename" >&2
+    exit 1
+fi
+
 # Check file path argument
 if [ -z "$FILE_PATH" ]; then
     echo "Usage: $0 <file_path> [subpath] [--force|--skip|--backup|--rename]" >&2