Ask HN: 요즘 무슨 일을 하고 계신가요? (2026년 9월)

I've been working on a voxel game engine called Bonsai for ~10 years. Probably the most interesting thing about it at the moment is the editor. The world, and most things in it, are represented as collections of SDFs. More accurately, they're density fields, but, potato-tomato. Bonsai has undergone a large rewrite over the last couple years that's nearing completion. A world edit is defined as a bunch of SDF parameters which get projected/rasterized into the voxel grid by a shader on the GPU. One neat thing about SDFs is they've been thoroughly researched and documented by a guy named Inigo Quilez, and they have a lot of nice mathematical properties. For example, you can do a smooth union of arbitrary SDFs to get nice rounded contours where shapes join. I've written every system from scratch, all the way from the memory allocators and font rasterizer to the collision detector and simulation loop. I even wrote a metaprogramming language as a replacement for C++ templates, which is a whole other story. IIRC the only external dependency is the C runtime library for starting the process and my very occasional use of variadic functions arguments. For a long time, an explicit non-goal of the project was to ship a game. It sounded insane to me to write an entire 3D engine and then ship a game. As it turns out, I've gotten it to the point where I can actually make a game. I've got a start on the game systems in a closed-source repo, and hope to have a steam page for it by the end of the year. I'll do some shameless self-promotion and leave some links here for anyone interested in looking at the engine, language code, or some pretty pictures. https://github.com/scallyw4g/bonsai https://github.com/scallyw4g/poof

I'm building https://uscodex.org. In a nutshell, the goal is to collect all US federal law in version control, and cross-link any references between different sections. Currently I have the US Code, CFR, ~30 years of public laws and congressional bills and 25 years of executive orders. Actually using raw git repos as the main data store which has worked out great since the US Code changes very little between new releases and so it compresses very well. Also makes it easy to generate diffs of sections: https://uscodex.org/usc/d/119-100/119-102not101/16/2201

I'm working on a real-life social app called Holler (https://justhollerapp.com). I'm an introvert and socially anxious, but I do enjoy hanging out with my friends. I just HATE the invitation-and-coordination game. If someone invites me and I don't want to go, I hate having to come up with a socially acceptable excuse. Inviting someone and waiting for them to make a socially acceptable excuse is equally awful to me. Then you get to coordination. I want to go to the brewery at 2pm, but your kid has soccer practice so you can't get there til 3:30, but then Joe has to leave at 4 to pick up his mother in law at the airport, and... ugh. It's the worst. So I made Holler, which is basically you hollering to your friends, "I'm going to be at the farmer's market at 2pm," and then you just go. If they show up, fantastic. If not, whatever, you were going to go anyway. No coordination, no invitations, no friction. Just holler and go. It's iOS only for now, but I'm working on an Android app as you read this, so hopefully that's coming soon.

Still working on my personal projects, for example an open source digital tool (code) library for humans and AI agents [1] (alpha) source code coming soon [2] and my own AI agent. But 95% of my time is spend on developing and researching new AI/ML algorithms, crazy 16 hour workdays but loving it! [1] https://tool.io [2] https://github.com/tool-io

DSCI - aka -Dead simple CI - https://deadsimpleci.sparrowhub.io

Im working on a tool that catches silent failures in agents before you deploy them... And "NO" it is not like langsmith/langfuse etc. they tell 'which' agent failed, but my tool (Argus) tells 'why' that agent failed. https://github.com/ArgusLabs-ai/ARGUS Reviews/Feedback are much appreciated!