wellbeing

Proactive coaching across hydration, breaks, meals AND posture. Use when an [activity] event fires (message starts with [activity] Activity detected: <labels>. — labels include drink, break, celebrate, the fatigue label "yawning", or sedentary raw labels like "using computer"; sedentary events may also carry a [posture_summary: {...}] block when the user has been at the computer long enough for posture to drift), or…