Nucleus

diff --git a/include/nucleus/lib.h b/include/nucleus/lib.h
new file mode 100644
index 0000000..a352728
--- /dev/null
+++ b/include/nucleus/lib.h
@@ -0,0 +1,21 @@
+#ifndef _NUCLEUS_LIB_H
+#define _NUCLEUS_LIB_H
+
+#include <stdarg.h>
+#include <stddef.h>
+
+int vsprintf(char *buf, const char *fmt, va_list args);
+int sprintf(char *buf, const char *fmt, ...);
+
+void *memset(void *dest, int byte, size_t len);
+int memcmp(void *s1, void *s2, size_t n);
+void *memcpy(void *dest, const void *src, size_t n);
+
+int strcmp(const char *s1, const char *s2);
+int strncmp(const char *s1, const char *s2, size_t n);
+char *strcpy(char *dest, const char *src);
+char *strncpy(char *dest, const char *src, size_t n);
+size_t strlen(const char *str);
+size_t strnlen(const char *str, size_t n);
+
+#endif