Have Claude Code build a treadmill running app overnight with competing 3D worlds
He asked Claude Code for a treadmill app at 22:05 and it was done by 07:05. When he called the 3D "a bit cheap" at 01:59, three agents each built a new world and a jury of agents picked the winner.
Source
@Nachoo0p on X · 2026-10-18
Written in our own words. Credit to the original author. Link checked 2026-10-18.
What they did
He asked Claude Code for a treadmill app at 22:05 and it was done by 07:05. When he called the 3D "a bit cheap" at 01:59, three agents each built a new world and a jury of agents picked the winner.
Result (as claimed)
He ran 45 minutes with it at the gym the next day.
Tools they used
Cost: Claude Code: from $17/mo; Claude Opus 5.5: from $4 in / $20 out per 1M tokens.
Set it up
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.
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.
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.
Test it like a user
Click through on desktop and phone. Ask the agent to add basic tests and fix anything that breaks.
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: Have Claude Code build a treadmill running app overnight with competing 3D worlds What the original author did: He asked Claude Code for a treadmill app at 22:05 and it was done by 07:05. When he called the 3D "a bit cheap" at 01:59, three agents each built a new world and a jury of agents picked the winner. Reported result (as claimed by the author): He ran 45 minutes with it at the gym the next day. Source: https://x.com/Nachoo0p/status/2111897838758047911 Tools they used: Claude Code, Claude Opus 5.5 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.
You are helping me set up this AI use case end to end in Codex. Goal: Have Claude Code build a treadmill running app overnight with competing 3D worlds What the original author did: He asked Claude Code for a treadmill app at 22:05 and it was done by 07:05. When he called the 3D "a bit cheap" at 01:59, three agents each built a new world and a jury of agents picked the winner. Reported result (as claimed by the author): He ran 45 minutes with it at the gym the next day. Source: https://x.com/Nachoo0p/status/2111897838758047911 Tools they used: Claude Code, Claude Opus 5.5 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.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Have Claude Code build a treadmill running app overnight with competing 3D worlds What the original author did: He asked Claude Code for a treadmill app at 22:05 and it was done by 07:05. When he called the 3D "a bit cheap" at 01:59, three agents each built a new world and a jury of agents picked the winner. Reported result (as claimed by the author): He ran 45 minutes with it at the gym the next day. Source: https://x.com/Nachoo0p/status/2111897838758047911 Tools they used: Claude Code, Claude Opus 5.5 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 run multiple coding agents together · How to make 3D scenes and models with AI and Blender · How to use AI agents for fitness and health
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