Build a booking app over a weekend with Claude Code and Codex

Try it yourself

What you get

A simple public booking page you own, built overnight by coding agents instead of buying a scheduler.

Tools

• Claude Code
• Codex
• Hosting for a small web app

Time / cost: Author: Saturday idea → Sunday live

Steps

1. Write the booking rules and what “done” means (confirm email, buffer, timezone).
2. Have Claude Code implement; ask Codex to review overnight.
3. Book a real slot yourself, cancel it, and check the reminder path.
4. Publish the link only after those three checks pass.

Copy-ready prompt

Build a minimal booking app for [SERVICE].
Requirements: [HOURS], [BUFFER], [TIMEZONE], email confirmation, cancel link, no accounts required for guests.
Stack: [STACK]. Overnight: implement, then open a PR and review it for timezone bugs, double-booking and missing cancel. Do not add payments yet.

Prompt written by AgentPlays, based on @Explosion5000’s post. Check the output yourself and approve before anything is sent or bought.

Watch out: Verify availability and cancel paths yourself before sharing with clients. Timeline is the author’s claim.

Proof / source

Self-reported Author’s Oct 14 post plus live URL meet.explosion5000.ai and a walkthrough video.