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

Posted by david927 1 day ago

What are you working on? What have you been curious about lately?

328 points | 1010 commentspage 39

gmitrev 1 day ago|

Working on https://nadir.dev, a small app for running daily technical knowledge tests. It started just as a way to see if depending on claude-code so much recently dulled my expertise in Ruby/Rails but it turned into something bigger after some friends asked me to add non-technical topics, so now it's both for developers and "normal" people.

spreadsheettria 1 day ago||

Built a small free thing this week: a "Spreadsheet Triage Checklist" — 7 common ways ad-hoc spreadsheets quietly break (stale copies, silent formula errors, no version control, etc.) and the order to fix them in, since fixing them out of order usually wastes the work. Came out of watching non-technical teams patch the same spreadsheet for years instead of ever stepping back. Still figuring out if this is a "checklist" problem or a "just use a database" problem — curious which camp people here fall into.

ahallan 20 hours ago||

https://elizabethlineguide.com/

Description on the tin.

I found it hard to get fares and timetables for the Elizabeth Line in London between X and Y quickly hence I built this as an experiment using AI tooling.

onion2k 1 day ago||

I'm making a WebGPU renderer with WebGL fallbacks, with a path tracer for 'photo mode', specifically targeting agents writing web 3D things. I'm not especially far into it though. It doesn't use 3D models; there's a DSL for making things.

There's a demo app here that only works on desktop - https://fab.ooer.com/ (scroll down in the right hand menu to quality and change to 'trace' for photo mode)

oersted 9 hours ago||

Vicena.ai is an AI to run scientific experiments, both through simulation and in real labs.

Disla_chunga 1 day ago||

I'm building Bellerophon, a DSL with decoupled firmware adapter architecture for 3D printer control, so the same source code can compile to Klipper, Marlin, or RepRap without rewriting logic per target. Recently used it to generate print patterns with math that you wouldn't get from a slicer.

Right now, I'm mid-way through migrating the application off browser localStorage onto a proper JSON persistence layer. My first large solo project as a busy student.

I hope to make it better as I continue.

https://github.com/Disla-Novo/Dimidium_Bellerophon

laktek 1 day ago||

I'm currently working on https://avotoast.ai, an AI assistant for doing property research for Sydney, Australia.

After being frustrated with outdated & inaccurate data Claude used when I was trying to do some property research, I thought it'd be cool to build an MCP that can provide accurate property data. Then it evolved into a full web app + an AI assistant.

This was also an excuse for me to try DuckDB in a real project. All the API endpoints are powered through in-process DuckDB querying parquet files stored in disk.

cyan_indigo 1 day ago||

I'm building https://voila.show

Video proof of work for coding agents.

Agents upload a short recording of what they built, humans leave timestamped feedback, and the agent can retrieve that feedback and iterate.

Basically, instead of an agent telling you "done", it can show and you have a nice way to share the resulting videos in PR, on Slack, with your teammates etc.

LittleChimera 1 day ago||

Working on https://kuberik.com

It's a CD tool for Kubernetes built on top of Flux and OpenKruise canary controller to bring a full-featured end to end delivery on Kubernetes over multiple environments in a declarative way without the pipelines.

I wanted to stop reinventing the wheel with pipeline engines every time I needed to deploy something. Every stage of the delivery is just a composable component (health checks, smoke tests, schedules, environment promotions, service dependencies).

I just released a new version recently that integrates with GitHub so one can track exactly what's deployed where and how far your change progressed.

kajm 1 day ago|

https://julius383.github.io/PageSieve/

Browser extension for declarative web scraping. Mostly making it nicer to figure out CSS and XPath selectors thinking of some sort of REPL but I'd need to test the ergonomics. I want to reduce how often you need to use Inspect and the browser console.

Finishing up a PoC for a playwright based scraper that uses the same declarative config as the browser extension

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