diff --git a/src/main/c/rule/tag/wsstags.c b/src/main/c/rule/tag/wsstags.c
new file mode 100644
index 0000000..267d74b
--- /dev/null
+++ b/src/main/c/rule/tag/wsstags.c
@@ -0,0 +1,19 @@
+#ifndef _HDR_HYPERBUILD_RULE_WSSTAGS
+#define _HDR_HYPERBUILD_RULE_WSSTAGS
+
+#include "../../ext/nicehash/set/str.h"
+#include "../../util/hbchar.h"
+
+static nh_set_str_t hb_r_wsstags_set;
+
+void hb_r_wsstags_init(void) {
+  hb_r_wsstags_set = nh_set_str_create();
+  nh_set_str_add(hb_r_wsstags_set, "code");
+  nh_set_str_add(hb_r_wsstags_set, "pre");
+}
+
+int hb_r_wsstags_check(hb_char_t *tag) {
+  return nh_set_str_has(hb_r_wsstags_set, (char *) tag);
+}
+
+#endif // _HDR_HYPERBUILD_RULE_WSSTAGS