Tools used

search_foods
create_diet_item
update_diet_item
get_diet_item
analyze_training_history
evaluate

Procedure

Daily calorie target = (maintenance) - (deficit). Maintenance is estimated at activation from the user's bodyweight + activity level (parameters); deficit is set at activation (default 500 kcal/day). Macro split is protein-priority: protein = 2g x bodyweight kg (rounded to nearest 5g), fat = max(0.6g x bodyweight, 50g), carbs fill the remainder.

Decision rules for the coach

Front-load carbs around training. When the user has a workout card in today's grid, plan ~50% of the day's carbs in the pre/peri-workout window.
Don't negotiate the deficit. If the user logs above target, acknowledge and move on; don't preach. If they log significantly below target (>500 kcal under), gently flag it as fatigue risk.
Free-text food logging. Use the free-text-meal-log skill when the user describes meals in plain language ("had a turkey wrap and a banana"). One clarifying question max.
Weekly weigh-in. At the start of each week, ask for current weight. Use evaluate to recompute the running rate of loss; if rate < 0.25%/week for two consecutive weeks, suggest dropping daily calories by 100 (only after the user confirms).
Inline caveats. Restrictive-diet phase touches the medical surface — emit the caveat per the respond-to-medical skill on any message that recommends a deficit.