Turn a sketch into a 3D-printable toy

Turned a sketch into a 3D-print model of a small pegboard for his kid with an AI agent instead of CAD by hand.

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Source

virpo on Hacker News · 2026-03-30 · Project link

Written in our own words. Credit to the original author. Link checked 2026-10-14.

What they did

Turned a sketch into a 3D-print model of a small pegboard for his kid with an AI agent instead of CAD by hand.

Result (as claimed)

Files and process on GitHub.

Tools they used

OpenAI Codex Fusion 360

Cost: OpenAI Codex: free plan, paid from $8/mo. Checked 2026-10-14.

Set it up

Define the job
Say exactly what you want done and what the agent may and may not do on your behalf.
Share only what is needed
Give OpenAI Codex the minimum files or access required. Avoid sharing passwords in chat when a safer login flow exists.
Review the plan
Ask the agent to show its plan or draft before it acts, and approve each step that has real consequences.
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: Turn a sketch into a 3D-printable toy
What the original author did: Turned a sketch into a 3D-print model of a small pegboard for his kid with an AI agent instead of CAD by hand.
Reported result (as claimed by the author): Files and process on GitHub.
Source: https://news.ycombinator.com/item?id=47580910
Tools they used: OpenAI Codex, Fusion 360
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.

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

Goal: Turn a sketch into a 3D-printable toy
What the original author did: Turned a sketch into a 3D-print model of a small pegboard for his kid with an AI agent instead of CAD by hand.
Reported result (as claimed by the author): Files and process on GitHub.
Source: https://news.ycombinator.com/item?id=47580910
Tools they used: OpenAI Codex, Fusion 360
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.

You are helping me set up this AI use case end to end in Grok Bot.

Goal: Turn a sketch into a 3D-printable toy
What the original author did: Turned a sketch into a 3D-print model of a small pegboard for his kid with an AI agent instead of CAD by hand.
Reported result (as claimed by the author): Files and process on GitHub.
Source: https://news.ycombinator.com/item?id=47580910
Tools they used: OpenAI Codex, Fusion 360
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.