App Builder

Intermediate

Booking System

Build a real booking system with availability, slot selection, and double-booking prevention.

6 steps19 verify checks60-120 minutesWorks with: emergent · chatgpt · claude · cursor

Start Guided Walkthrough

#booking #appointments #calendar #scheduling #slots

The Route

0/6 verified

Define the booking model

Slots, durations, and conflict rules must be explicit before building UI.

3 checks 02

Build availability display

Show real availability computed from actual bookings.

3 checks 03

Implement booking creation

Booking must persist and re-verify the slot server-side at submit time.

3 checks 04

Prevent double booking under race

Two users clicking the same slot must not both succeed.

3 checks 05

Build my-bookings with cancel

Users must see and manage their bookings; cancel must free slots.

3 checks 06

Booking QA pass

Verify the full lifecycle and edge cases with evidence.

4 checks

Every step ends at a Verify Gate. Do not continue until every check passes.

Context Pack

Paste this first. It briefs the AI on requirements, constraints, and the Definition of Done before your first build prompt.

Context Pack

PROJECT CONTEXT:
I am building an app where users book time slots (appointments, reservations, or services).

GOAL:
Implement working availability display, slot booking, double-booking prevention, and booking management.

REQUIREMENTS:
- Bookable services/resources with defined time slots
- Availability view that reflects existing bookings
- Booking creation with confirmation
- Double-booking prevention enforced server-side
- My-bookings view with cancel

CONSTRAINTS:
- A booked slot must become unavailable for everyone
- Enforce conflicts on the server, not just the UI
- Past dates must not be bookable

DEFINITION OF DONE:
- Available slots display correctly for a chosen date
- Booking a slot persists and confirms
- The same slot cannot be booked twice
- Cancel frees the slot again

COMMON FAILURES TO AVOID:
- A calendar UI where every slot always shows available
- Bookings stored in local state only
- Two users able to book the same slot
- Cancel that does not free the slot

Paste this into your AI builder first. It teaches the AI what you want before you give it the build prompt.

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