01 — The machine

AI takes the lead

Agents do the heavy lifting everywhere — workshopping design, drafting specs, writing the tests, and shipping code.

J

Jemma

We need patients to book GP appointments online — up to 30 days out, and they should be able to cancel right up to the start time.

W

Workhorse

Good. A few things to nail down: should patients be able to reschedule as well as cancel, and if so up to how close to the start time?

W

Workhorse

Drafting spec changes

02 — The driver

Humans shape the product

People decide what to build, and define the spec that drives everything else.

Specifying4

BK1

Online booking flow for patients

BK2

Provider availability calendar

BK3

Reschedule and cancellation rules

BK6

Reminder SMS before appointment

03 — The source of truth

Specs are king

Clear specs are the key human output, and the key input to everything downstream — tests, code, release notes, and user manuals.

Appointment booking

Patients book, reschedule, and cancel appointments with a GP online, within the provider's available calendar.

Booking window

−Bookings can be made up to 14 days in advance.

+Bookings can be made up to 30 days in advance.

Only slots within the provider's declared availability are offered.

+Patients can cancel or reschedule right up to the appointment's start time.

04 — UX/UI

Design is the fun part

Workshop screens in conversation — three takes in three minutes, anchored to the design system, native in HTML and CSS.

Slot picker — variations

Calendar grid

Time pills

Vertical list

05 — In parallel

Always multi-tasking

Stay in flow, jump in wherever you're needed.

Recent

BK1Online booking flow

BK5Provider availability edge cases

BK2Provider calendar sync

BK3Reschedule window rules

BK6SMS reminder copy

BK7Waitlist for fully-booked days

06 — Open by default

No lock-in

Use your favourite design tool, IDE, or external agent at any step with easy handoff.

J

Jemma

Can we build the booking confirmation step in Cursor instead?

W

Workhorse

Sure — I'll prep a briefing prompt with the spec, the current code, and open questions so you can paste it straight in.

Implement this

Handoff to Cursor

Draft spec changes

Review spec

Tech design

Mock this up

Workshop this

Continue the conversation…

Welcome to the new way of building software.

The thinking behind Workhorse: building software in the agent era