This is xnu-10002.1.13. See this file in:
Directory listing for xnu-10002.1.13//bsd/skywalk
Makefile
channel/
core/
lib/
mem/
module.modulemap
namespace/
nexus/
os_skywalk.h
os_skywalk_private.h
os_stats_private.h
os_sysctls_private.h
packet/
skywalk.codes