how subagent activate the skill

[jixian01]

Hey all,
in cc official docu https://code.claude.com/docs/en/sub-agents, it state:
"skills No Comma-separated list of skill names to auto-load when the subagent starts. Skills are loaded into the subagent’s context automatically"
my understand if the skills listed frontmatter will be auto loaded and subagent could use the skill during conversation session. not listed skills are unknown in the subagent context and can't be used.

i saw almost all of the subagents in this repo don't have skills config in frontmatter. does the subagent works with skill? or the subagents don't need skill.

BR