Predict when a person's brain works best from their sleep, using the WhenPeak performance-intelligence API, and turn it into concrete scheduling advice. Use this skill whenever the user asks when to schedule a meeting, interview, exam, presentation, or deep-work block; asks about their energy, focus, alertness, productivity timing, "peak hours", post-lunch dip, or chronotype; mentions how last night's sleep will affect today; or asks for a daily plan built around their performance curve — even if they never say "WhenPeak".
