checkout-flow
Checkout orchestration — cart, payment rails, installments, quote negotiation, and outcome recovery.
Interactive HTML spec prototypes. Each one maps UI screens to state-machine states and adapter shapes, with the design reasoning kept beside the screen it explains.
Registry: Flows & State MachinesCheckout orchestration — cart, payment rails, installments, quote negotiation, and outcome recovery.
KYC/KYB instrument orchestration — consent, step picker, provider SDK shapes, and terminal outcomes.
CPA landing-page funnel — slot composition, page types, and the thin conversion state machine.
WithMe wishlist de-risking — a generative-UI gift concierge that turns a free-text wish into buyable, ship-able intent and prefills the form description in plain words.
Lagos street-food POS. The counter tablet loop — menu grid, modifier sheet, order pane, payment — plus 86'd items, manager void, and the four degraded connectivity modes.
The KDS across two surfaces: TV for awareness, station tablet for action. Density tested at 6/12/20 tickets, multi-cook ownership, per-line bump, and the solo single-screen fallback.
The money surfaces. Handing food to the right person at a crowded pass, and closing the day so the drawer, the debts, and the wasted food each stay separate.
A vendor's first hour: sign up, photograph the menu board, add staff codes, pair the tablet, open for business — then the ongoing menu, prices and sold-out management.
The three customer-facing artifacts: the status board, the thermal receipt, and the public phone lookup. Includes the order-number gap problem and a proposed fix.
79 screens across seven flows for a Nigerian mixed farm. Daily capture on a phone with no signal, corrections that reverse-and-repost instead of editing, sale on credit with aging, live sorting of fish and chicks, and the three costing archetypes — including the point-of-lay prompt without which a layer flock is mis-costed for its entire life. Role lens: press W to see the same 79 screens as a worker who cannot see money.