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

It started as a way to fix audio drift in my multi-room setup without using large jitter buffers, but it turned into a standalone project where I started learning more about NIC driver latency. I found that if you isolate a specific CPU core (isolcpus), disable all interrupt coalescing and busy-poll the RX ring buffer with a custom AF_XDP socket, you can characterize the PHY and PCIe bus latency jitter to within a standard deviation of few ns on generic realtek hardware.

I'm using this disciplined clock to do TDOA (time difference of arrival) triangulation of RF signals inside my home. I have three anchor nodes running this stack connected to SDRs. I can currently track the physical location of my dog's collar to within 15cm in 3D space by correlating the signal peaks. The hardest part is writing the solver for the multipath interference. I'm implementing a custom unscented kalman filter to reject the signal reflections bouncing off my refrigerator and radiators. I know what you're thinking. Yes, it sounds totally excessive but getting sub-microsecond synchronization without an FPGA switch feels like magic.

https://captainzero.ai

The game engine I work on (link in bio) developed a custom language for engine customization, but it never had any runtime debugging capabilities. I've been adding that over the last couple weeks.

The language compiles to a bytecode, which is what the engine runs. But the bytecode has no source information.

The easy part was getting source locations for stack traces (associating each generated bytecode with an originating source line of code).

Harder was getting scopes information for displaying function names in those stack frames, and for associating runtime variables per-scope (stack variables, globals, class fields, etc.)

Now I just need to create an expression parser for evaluating expressions at runtime based on the current scope, add breakpoints and step over/into/etc. capability to the engine, then wrap it all together in a VSCode extension.

https://web.zquestclassic.com/zscript/ (this doesn't show what I'm working on, it's just a basic web text editor to quickly test the language. can't run it from here).

If you love reading, want to have an easy way to access your collection, and share it with a few people, this is for you.

https://github.com/colibri-hq/colibri

I’m looking for contributors who would like to help shape Colibri into a counter-approach to big tech; it’s specifically meant to never get monetised, and explore what such software can become.

I have been working on Wait: https://github.com/tanin47/wait, a self-hostable CORS-enabled headless waitlist system that connects to Google Sheets.

I have many landing pages hosted for free on Netlify and Github Pages as static pages. All of them have waitlist forms that send cross-domain AJAX requests to the Wait server, which then writes the emails to Google Sheets. Since there's no iframe, it's easier for me to style the form and customize the after actions.

The Wait server is hosted on OVHCloud for $4/month. It's probably the most economical option for a waitlist system.