Real AI agent use cases, with sources and setup prompts

Turn a 7-line game brief into a playable drifting game with Claude Code

A builder used Codex to shape the concept and gave Claude Code a seven-line product brief. Half an hour later he had a playable drifting game, then iterated for a few hours in the background.

$17/mo30 minutesBeginnerSource linked

Source

@froessell on X · 2026-10-19

Written in our own words. Credit to the original author. Link checked 2026-10-21.

What they did

A builder used Codex to shape the concept and gave Claude Code a seven-line product brief. Half an hour later he had a playable drifting game, then iterated for a few hours in the background.

Result (as claimed)

Drift Lane runs in the browser on phones and desktops in portrait and landscape.

Tools they used

Claude CodeOpenAI Codex

Cost: Claude Code: from $17/mo; OpenAI Codex: free plan, paid from $8/mo.

Set it up

  1. Write a one-page brief

    Describe the app in plain words: who it is for, the 3 core screens or actions, and what "done" looks like.

  2. Start the project with your agent

    Open Claude Code and paste the brief. Ask it to propose a stack and a file plan before writing code.

  3. Build one slice at a time

    Ship the smallest working flow first, run it, then add features one by one. Commit after each working step.

  4. Test it like a user

    Click through on desktop and phone. Ask the agent to add basic tests and fix anything that breaks.

  5. Check security and ship

    Keep keys in environment variables, check auth and database rules, then deploy and share the link.

Copy the full setup prompt

Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.

You are helping me set up this AI use case end to end in Claude Code.

Goal: Turn a 7-line game brief into a playable drifting game with Claude Code
What the original author did: A builder used Codex to shape the concept and gave Claude Code a seven-line product brief. Half an hour later he had a playable drifting game, then iterated for a few hours in the background.
Reported result (as claimed by the author): Drift Lane runs in the browser on phones and desktops in portrait and landscape.
Source: https://x.com/froessell/status/2112149849130864898
Tools they used: Claude Code, OpenAI Codex
Category: Vibe coding & apps

Please:
1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like).
2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure.
3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data.
4. Finish with a checklist to run it again next time.

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Guides for this use case

How to vibe code an app with Claude Code · How to use Claude Code and Codex together · How to vibe code a game with AI · How to run multiple coding agents together

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