Claude Code session-start hook boosts skill firing to 62%

An analysis of Claude Code skill triggering reveals that original skill descriptions fire target skills on reworded requests only 15% of the time, while adding a "pushy" description sentence increases that rate to 20%. Introducing a session-start hook dramatically raises the firing rate to 62% without triggering target skills on near-miss boundary cases. The author tested 26 public skills across 1,872 automated runs using Haiku, Sonnet, and Opus models. Open article →