Real AI agent use cases, with sources and setup prompts

Replace an abandoned Mac app with one you vibe code in 30 minutes

Claude helped him clean old software off his Mac, including apps not built for Apple Silicon. Canon never released an Apple Silicon version of his scanner app, so Codex one-shotted a replacement with a better UI.

$10 in / $50 out per 1M tokens30 minutesBeginnerSource linked

Source

@MrQuiyst on X · 2026-10-18

Written in our own words. Credit to the original author. Link checked 2026-10-19.

What they did

Claude helped him clean old software off his Mac, including apps not built for Apple Silicon. Canon never released an Apple Silicon version of his scanner app, so Codex one-shotted a replacement with a better UI.

Result (as claimed)

A working scanner app in 30 minutes.

Tools they used

Cost: GPT-6 Astra: from $10 in / $50 out per 1M tokens; OpenAI Codex: free plan, paid from $8/mo.

Set it up

  1. Define the job

    Say exactly what you want done and what the agent may and may not do on your behalf.

  2. Share only what is needed

    Give Claude the minimum files or access required. Avoid sharing passwords in chat when a safer login flow exists.

  3. Review the plan

    Ask the agent to show its plan or draft before it acts, and approve each step that has real consequences.

  4. Check the result

    Confirm the outcome yourself (order placed, request sent, document understood) and keep a record.

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: Replace an abandoned Mac app with one you vibe code in 30 minutes
What the original author did: Claude helped him clean old software off his Mac, including apps not built for Apple Silicon. Canon never released an Apple Silicon version of his scanner app, so Codex one-shotted a replacement with a better UI.
Reported result (as claimed by the author): A working scanner app in 30 minutes.
Source: https://x.com/MrQuiyst/status/2111923199038693538
Tools they used: Claude, GPT-6 Astra, OpenAI Codex
Category: Personal & life

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 run multiple coding agents together

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