diff --git a/cmd_string.go b/cmd_string.go
new file mode 100644
index 0000000..c3206ec
--- /dev/null
+++ b/cmd_string.go
@@ -0,0 +1,26 @@
+// Code generated by "stringer -type cmd"; DO NOT EDIT.
+
+package main
+
+import "strconv"
+
+func _() {
+	// An "invalid array index" compiler error signifies that the constant values have changed.
+	// Re-run the stringer command to generate them again.
+	var x [1]struct{}
+	_ = x[undefinedCmd-0]
+	_ = x[addCmd-1]
+	_ = x[listCmd-2]
+	_ = x[flushCmd-3]
+}
+
+const _cmd_name = "undefinedCmdaddCmdlistCmdflushCmd"
+
+var _cmd_index = [...]uint8{0, 12, 18, 25, 33}
+
+func (i cmd) String() string {
+	if i < 0 || i >= cmd(len(_cmd_index)-1) {
+		return "cmd(" + strconv.FormatInt(int64(i), 10) + ")"
+	}
+	return _cmd_name[_cmd_index[i]:_cmd_index[i+1]]
+}