Claude Code's skillListingBudgetFraction: The Undocumented Setting Silently Killing Half Your Skills
There is an undocumented setting in Claude Code 2.1.129 called skillListingBudgetFraction that controls what percentage of the context window is allocated to skill listings each turn. The default is conservative — and if you have more than 15-20 skills installed, half of them are silently not loading.