Hacker News: Jemm

New comment by Jemm in "Ask HN: Should I be polite to my agent or should I treat it like shit?"

Jemm — Thu, 29 Oct 2026 16:21:31 +0000

I don't want to waste tokens on politeness but I'll tell the AI if it is doing a shit job.

New comment by Jemm in "My Students Can't Read"

Jemm — Thu, 29 Oct 2026 16:20:06 +0000

Send someone a message with two questions. Almost all people only respond to one of those questions.

New comment by Jemm in "Ask HN: CAD for wood working with LLM support?"

Jemm — Thu, 15 Oct 2026 06:35:53 +0000

RapidCAM.app (https://rapidcam.app) has excellent support for AI. The file format specs are published and open source so AI can easily write an ".rcam" file.

RapidCAM.app is a parametric 2.5D CAD/CAM for CNC and laser with support for rotary axis. RapidCAM.app runs in the browser or as desktop apps. There is no login required. The app is free to use. Privacy is respected. rcamhub.com is the sharing site for .rcam files.

Within the App, you can define your project and then use the built in prompt generator. This creates a prompt with all the details AI could need. Once the AI replies with the file, you can paste it back into the app which will then verify the file for you.

Desktop versions of the app have MCP server built in so AI can control the app directly if that is a route you prefer.

I started RapidCAM for my own use as I found that the CNC was sitting idle simply because firing up a full CAD/CAM package took too long. The idea with RapidCAM is that you can quickly sketch out your job from as simple as you need to as advanced as you want going from unconstrained to full parametric/constrained as required.

New comment by Jemm in "Jury finds Facebook liable for deceiving users in Cambridge Analytica case"

Jemm — Sat, 26 Sep 2026 10:30:02 +0000

Prolong is a legal tactic

New comment by Jemm in "FAA debuts its AI-powered tool for managing flight traffic"

Jemm — Tue, 22 Sep 2026 10:31:03 +0000

Well that can't be good.

New comment by Jemm in "Show HN: Ax-check.com – Can agents use your product?"

Jemm — Sat, 19 Sep 2026 05:01:19 +0000

Rapidcam.app is a CAD / CAM for CNC and laser. The file format is designed for LLMs and for version control. The app has a in-built prompt generator and solver so you can use your own LLM.

New comment by Jemm in "Ask HN: What are you working on? (September 2026)"

Jemm — Mon, 14 Sep 2026 09:50:52 +0000

https://rapidcam.app CNC and laser CAD/CAM for both quick designs and full 2.5D parametric models. Free and runs entirely client side in the browser with no log in required.

The file format is open source, designed for LLMs and for source control. The app has a visual diff system built in.

I designed RapidCAM for me as none of the available options really met my needs. Happy to see that other people are now using it.

New comment by Jemm in "Show HN: ProofOfDonation, replace CAPTCHAs with charity donations"

Jemm — Sun, 13 Sep 2026 09:50:58 +0000

Fuck that shit

New comment by Jemm in "Benchmark: CadQuery vs. OpenSCAD for agentic CAD work"

Jemm — Sat, 12 Sep 2026 22:07:55 +0000

I've been making Rapidcam.app. The file schema is open source and json format designed for AI to be able to write directly. The format is also designed for version control. The focus is 2.5D parametric mostly for 3 or 4 axis CNC.

New comment by Jemm in "DeepSeek v4.1 Flash Uncensored"

Jemm — Fri, 11 Sep 2026 10:23:24 +0000

You could say the same thing about libraries and education.

New comment by Jemm in "The Gemini app is now available for Windows"

Jemm — Fri, 11 Sep 2026 10:18:31 +0000

What is the point of the app if it cannot do anything other than cloud based tasks?

New comment by Jemm in "Show HN: I missed the moving blocks, so I built a real Linux disk defragmenter"

Jemm — Sun, 30 Aug 2026 07:55:39 +0000

I had a job going to various store locations and running defragment on point of sale computers. It was incredibly zen.

New comment by Jemm in "Will you have spent more of your life with computers than your family?"

Jemm — Mon, 17 Aug 2026 21:09:43 +0000

If I am luchky, yes!

New comment by Jemm in "The Legend of the Novell NE2000 [video]"

Jemm — Fri, 14 Aug 2026 13:34:16 +0000

Ah, the glory days of finding interrupts, network cards that literally caught on fire, hunting down that one screamer that took down the whole LAN. I don't know why we glorify nostalgia, it was cool at the time but not great. Especially horrible was the Novell 'priesthood' who refused to share any information for fear of giving up power.

New comment by Jemm in "France to ban unsolicited telemarketing calls"

Jemm — Tue, 11 Aug 2026 13:39:45 +0000

'unsolicited', means every contract or click will include accepting calls.

Canada tried this years ago and it has barely made a dent. What we really need is a secure telephone system but our regulators refuse to consider doing so

New comment by Jemm in "Ask HN: What are you working on? (August 2026)"

Jemm — Mon, 10 Aug 2026 04:48:04 +0000

RapidCAM.app is still taking up all my time. It is a 2.5D, parametric CAD/CAM program for CNC and laser with flat or 4th axis. Open source, free, run completely in browser.

This is a passion project that I want for my own use but am happy if other's find it useful and very open to feedback and collaboration.

The file system is open and very well defined so that AI can write files. There is an AI Assistant dialog that helps you to write prompts and then takes the AI file and runs the file through a solver and checks.

New comment by Jemm in "ScreenWall – Turn old phones into synced widgets for your space"

Jemm — Wed, 22 Jul 2026 12:32:24 +0000

The flight sim community is going to love this project for home cockpits.

New comment by Jemm in "Biohacker seeking immortality afflicted with incurable 'stomach eating' disease"

Jemm — Wed, 08 Jul 2026 17:01:41 +0000

I completely support people who want to be guinea pigs for health science.

New comment by Jemm in "Show HN: RapidCam – Browser-based, parametric 2D CAD/CAM app for CNC and laser"

Jemm — Sat, 27 Jun 2026 12:16:01 +0000

RapidCam solves the problem I had where I wanted to make parts without having to fully 3D model them first. There are other apps that work in 2d but they tend to be either complicated or not parametric. My initial task was to cut out and pocket cabinet doors and drawer fronts of various sizes. Now I can design the shapes and assign toolpaths for the CNC; then for the next door, I just need to change a few variable values and the design adjusts.

App is open source: GitHub: https://github.com/jennib/rapidcam

Currently no login or signup needed.

Contributions, suggestions, testers are all welcome.

Show HN: RapidCam – Browser-based, parametric 2D CAD/CAM app for CNC and laser