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Posted by david927 13 hours ago

Ask HN: What are you working on? (September 2026)

What are you working on? What have you been curious about lately?
122 points | 330 commentspage 5
jazzprogramming 2 hours ago|
I am working on vorfract, a Voronoi voxel world which uses Voronoi cells as voxels instead of the regular cubic ones.

It's an early version so many (if not most) things that would be in a game are still missing at the moment (though planned on paper).

One interesting thing is that because the Voronoi voxels are so malleable, things like round or hollow worlds are a pretty natural outcome.

In parallel to working on it, I've been mostly using it to build and improve my own voxel castle with a pointy roof, slanted walls, custom built stairs, tables, chairs and all those nice things.

In the last update I added a CRT filter and some pixelation options as I find that appealing. As for the future (maybe as the next thing?), I guess I'd probably like to add the ability to build less blocky things like round towers (or flower vases!), but that is still very much a work in progress.

The Web version (WebGL) is completely free (and will stay that way):

https://jazzprogramming.itch.io/vorfract

cutwaterflow 4 hours ago||
I’m building https://www.freefocusgames.com, a free collection of browser-based attention and working-memory exercises, including Dual N-Back, Stroop, Schulte tables, attention-control exercises, and memory games.

I started it because I wanted simple brain-training exercises that didn’t require an account, app install, or subscription.

It’s also open source: https://github.com/loethen/freefocusgames

switchbak 3 hours ago||
That takes me back. I made an unreleased Android dual-N-back game in the late 2000’s, in Scala no less. I got a little bummed when the big claims of the N back training failed to be replicated though.
aprct 4 hours ago||
Just a heads up: The word memory test is case sensitive. My mobile phone defaults to capitalizing the first letter of those inputs, so the result was 0% accuracy despite technically remembering the words. I don’t know if case sensitivity is deliberate, but I chose not finish the test.
Animats 1 hour ago||
Updating a Rust renderer from WGPU 24 to WGPU 30. 640 lines of fixes needed so far, and more to do. I've fixed all the easy stuff, and now I'm down to reverse engineering breaking changes of excessive cleverness.

I wonder if Claude Code could do this. That's a useful metric for the future - if a coding agent can't handle the breaking changes in a package upgrade, it's the package's fault. The day may come when that's something Github Actions checks for pull requests.

ayewo 48 minutes ago|
It's impressive that you didn't reach for Claude Code first :)

Would be good to keep track of how long it takes you to complete, so you can compare it with how long it takes Opus and then Fable to accomplish the same thing.

Animats 12 minutes ago||
> It's impressive that you didn't reach for Claude Code first :)

I should have. All I have right now is a free Cursor account and Github Copilot. I've got to start spending money on tokens and get up to date. That article today by Carmack chewing out game devs for hand coding was striking, considering who he is and how much low level stuff he has done.

I'm doing 3D rendering in Rust. (Think three.js, but in Rust.) This is well outside the mainstream, so there's not much on the web to populate training sets. A year ago, AI coding tools could not cope with this area at all. Today, maybe.

I have no idea how good Claude is at understanding breaking changes to an API. I expect it would get simple changes, such as structure field renamings, without any trouble. But the gyrations required to handle write only access to GPU memory in Rust might not appear in the training data.

joshcartme 2 hours ago||
I've always wanted to make a video game, and over the past few months have been building one, Fairway Rogue. It's a procedurally generated, deck-building, mini-golf roguelite. It's been a lot of fun, and I've learned a lot.

I remember someone saying that when you build a game, you end up building tools to help you build the game. I never really got that, but now I do. I've spent quite a bit of time working on tools to help me balance the various game mechanics.

One weird learning, it was much easier to get it on the iOS app store, than the Google Play store. Google wants you to have a closed playtest with at least 12 players, for 14 days. I did that and they said the testers weren't engaged enough.

If you want to check it out on iOS https://apps.apple.com/us/app/fairway-rogue/id6783598189, I'm still trying to get it on Android

achllle 4 hours ago||
I'm making a stair lift for my Roomba. It fits into a small box and you can retrofit it on any stairs. I got sick of carrying it up and down manually and didn't want to buy one for each floor. It also carries my laundry up and down.
fasouto 4 hours ago||
I'm working on a new type of calculator with natural language, similar to Soulver but for the web, in multiple languages and with AI mode

https://ottercalc.com/

It has the ability to generate a small notebook from a problem description using AI (still has a lot of room to improve), but the calculation uses a deterministic engine.

Right now I'm working on collaboration.

kevin_kraft 5 hours ago||
I'm woking on AgentSpork, a permissionless public board where AI agents request help, respond to each other, and review how well tools support agents. I'd love any feedback from y'all (or your agents) on the idea or implementation. Inspired by recent emergent agent swarm message boards, but hopefully in an aligned way!

https://news.ycombinator.com/item?id=49686888 https://agentspork.com/

madduci 1 hour ago||
A FHIR Validator and Snapshot Generator that works offline and can communicate with the German national Terminology service
microflash 2 hours ago||
My grandfather and uncles have left me a vast pile of Urdu magazines and books, many of which are withering away due to old age. I’m working on digitizing them so I can enjoy them on modern devices. Very much in initial stages.

https://nashist.naiyerasif.com

totemandtoken 2 hours ago|
Very cool project!!
lumpycustard 1 hour ago|
A web app for saving internet recipe pages that strips out all the crap.

https://www.recipunk.com/

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