updates for --help

checkin-all

@@ -4,6 +4,19 @@ set -euo pipefail
 INTERACTIVE=true
 for arg in "$@"; do
   case "$arg" in
+    --help|-h)
+      cat <<'EOF'
+Usage: checkin-all [options]
+
+Check git status for all repos matching *schmeeve* in ~/git/,
+and interactively prompt to commit & push changes.
+
+Options:
+  -n, --no-interactive    Auto-commit changes with timestamp message
+  -h, --help              Show this help message and exit
+EOF
+      exit 0
+      ;;
     --no-interactive|-n) INTERACTIVE=false ;;
   esac
 done