Real AI agent use cases, with sources and setup prompts

Design a device UI with ChatGPT sprites and port it to LVGL with agents

A hardware builder made the screens and sprites for his Capy device in ChatGPT, exported a transparent sprite sheet so nothing had to be cut out by hand, and had Codex and Claude Code slice the art and port the UI to the LVGL embedded graphics library.

$17/mo1 dayIntermediateSource linked

Source

@zathvarun on X · 2026-10-12

Written in our own words. Credit to the original author. Link checked 2026-10-22.

What they did

A hardware builder made the screens and sprites for his Capy device in ChatGPT, exported a transparent sprite sheet so nothing had to be cut out by hand, and had Codex and Claude Code slice the art and port the UI to the LVGL embedded graphics library.

Result (as claimed)

The Capy UI runs on the device; he shared the steps after people asked how it was made.

Tools they used

ChatGPTOpenAI CodexClaude CodeLVGL

Cost: OpenAI Codex: free plan, paid from $8/mo; Claude Code: from $17/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 ChatGPT 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: Design a device UI with ChatGPT sprites and port it to LVGL with agents
What the original author did: A hardware builder made the screens and sprites for his Capy device in ChatGPT, exported a transparent sprite sheet so nothing had to be cut out by hand, and had Codex and Claude Code slice the art and port the UI to the LVGL embedded graphics library.
Reported result (as claimed by the author): The Capy UI runs on the device; he shared the steps after people asked how it was made.
Source: https://x.com/zathvarun/status/2109604995909791757
Tools they used: ChatGPT, OpenAI Codex, Claude Code, LVGL
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 port code to another language with AI · How to run multiple coding agents together · How to vibe code an app with Claude Code · How to use Claude Code and Codex together

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