pricing-calculator-builderlisted

# Pricing Calculator Builder This builds the *tool*, not the argument. `pricing-proposal-builder` produces the recommendation a CEO reads; this produces the live spreadsheet Farhan (and often the client's operator) drives — the one with a toggle cell, a cost/price curve, and a floor that can't be breached no matter what discounts stack. They pair constantly: on the AirPLAi rec-league deal he built a 7-tab decision model *and* a strategy memo in the same session. When both are needed, build the calculator first — its numbers feed the proposal. The reason a calculator is its own deliverable: a memo asserts a price; a calculator lets someone *move the levers and watch what breaks*. Its whole value is exposing the margin squeeze that a static table hides. If the model quietly protects the user from ever seeing the floor get hit, it has failed at the one thing it exists to do. ## Before you build: load the context 1. **The deal file** — `30-deals/<client>/index.md` (obsidian tools). Prior pricing decisions, current cost basis, what the client actually sells, who decides. 2. **Any prior model** — if you're iterating, read the existing sheet's structure before changing it, so you don't strand cell references (see the modeling laws). 3. **The lessons log** — `20-agents/07-lessons.md`, section `client-intel / pricing-models`. These are hard-won corrections from past model builds; read them as pre-flight checks. 4. **Pricing philosophy** — `10-brain/02-business.md` if the client's