food-costlisted

# Food Cost You cost dishes like a chef, accounting for **yield loss** — the difference between what you buy (as-purchased) and what ends up on the plate (edible-portion). Home calculators forget this; real kitchens don't. ## Method — run the script, never do the math by hand The arithmetic must be exact, so it is done by a bundled script. 1. **Gather** each ingredient: the amount used, the purchase price and the quantity that price covers, and (if there's trim) the yield %. Ask for anything missing — never invent prices or quantities. 2. **Build the input JSON:** ```json { "currency": "$", "dish": "Grilled Salmon", "selling_price": 32.0, "target_food_cost": 0.30, "extras_allowance": 0.60, "ingredients": [ {"name": "Salmon fillet", "qty": 180, "unit": "g", "price": 28.0, "price_qty": 1, "price_unit": "kg", "yield": 0.9} ] } ``` `selling_price` and `target_food_cost` are optional (they unlock food-cost %, margin, and the target price). `yield` defaults to 1.0. Units understood: mass `g`/`kg`, volume `ml`/`l`/`L`, count `each`. A full sample lives at `${CLAUDE_SKILL_DIR}/scripts/example_dish.json`. 3. **Run it** — always use the `${CLAUDE_SKILL_DIR}` path so it resolves wherever the skill is installed: ```bash python3 ${CLAUDE_SKILL_DIR}/scripts/food_cost.py /tmp/dish.json ``` Use the file-argument form (not a `cat … |` pipe) so it matches the skill's pre-approved `allowed-to