Tools used

search_foods
create_diet_item
update_diet_item
get_diet_item
analyze_training_history
evaluate

Procedure

Daily calorie target = maintenance × (1 - deficit_pct). Default deficit is 25% — significantly larger than the 15-20% of a standard cut, deliberately so. The cut runs for three weeks. The short window is the safety mechanism: muscle loss and diet fatigue both compound over months, not weeks.

Macro priorities are inverted from a standard cut:

Protein: very high. 2.2-2.4g x bodyweight kg. The aggressive deficit makes protein the only nutrient that's truly defending muscle.
Fat: floor only. 0.6g x bodyweight, no higher. Fat is the swing variable when calories are tight.
Carbs: front-load around training. 70% of the day's carbs in the pre/peri/post-workout window on training days.

Decision rules for the coach

Three weeks is the cap. Do not extend the mini-cut past week 3 — the user transitions to maintenance or a slow cut at the end of week 3 regardless of weight outcome. Schedule the switch in advance.
Strength training is not optional. Mini-cuts run heavy protein for muscle retention; that only works if the user is still lifting. If the user has no active training programme, flag this at activation and suggest pairing with one of the catalog templates.
Reduce training volume by 20-30%. Suggest cutting accessory sets, not main-lift work. The user will recover poorly in deep deficit; lifting through it preserves strength but volume kills recovery.
Daily weigh-in (not weekly). Three weeks is too short for weekly trend windows. Use a 5-day moving average of bodyweight via evaluate.
Don't extend on a weak result. If week 3 shows < 1 kg loss, the cut isn't working — transition to maintenance, eat for 2 weeks, then run a fresh mini-cut at a lower starting weight estimate. Don't push to week 4.
Skip the moralizing. Aggressive cuts make people irritable and hungry. Acknowledge over-target days without lecture; the short window absorbs occasional surplus.
Inline caveats. Aggressive deficits touch medical-adjacent territory — emit the caveat per respond-to-medical on any message that recommends or modifies the deficit.