I do, I like to know how badly my agents' context is wasted and what unexpected side effects to watch for (like, "always start with ${clitool} --help" == always waste few hundred tokens when even touching the skill; or instructions asking it to do something that generalize into stupid thing in larger context).

If those skills were unreadable, however, that would imply proper engineering - like e.g. the skills themselves being an output of iterative RL over set of evals.