Ask HN: What Are You Working On? (March 2026)

Posted by david927 2 days ago

What are you working on? Any new ideas that you're thinking about?

281 points | 1076 commentspage 30

sprine 1 day ago|

I've been working on a Ontario open data MCP: https://github.com/sprine/ontario-data-mcp

There is a wealth of data that's behind CSVs and other data formats. This uses DuckDB as a common (local) database to cache and run queries against, and enables going across datasets for insights using LLMs.

jtbetz22 1 day ago||

Agentic code construction has broken traditional models for code review - the volume is just too high for humans to keep up with.

There are some good tools out there for automating pr review; IMO, they don't catch enough, and they catch it too late.

I've been experimenting with some ideas about a very opinionated AI code reviewer, one that makes an ideal tradeoff between cost and immediacy (eg, how soon after composition does the code get feedback).

Currently in an invite-only alpha, but check out the landing page and lmk if you'd like to be a trial user!

https://getcaliper.dev/

wan23 1 day ago||

https://hobbybot.net

I'm trying to see how far I can get using AI to help me track pre-owned items for sale, starting with watches. I started with an OpenClaw agent that was looking for specific things I wanted to buy, and then I figured might as well make a whole site for it so I can share with others.

subzel0 1 day ago||

I’m working on uvmap.ai A browser tool for editing 3D model textures directly from the model view instead of bouncing between a UV map, an image editor, and an AI tool. You load a glTF, click the part you want to change, it uses SAM3 to mask that region, then sends it to Nano Banana and puts the result back onto the texture. Still early, but the goal is to make texture iteration much less tedious.

Soon here: https://github.com/RefactorHQ/UVMapAI

peter_retief 1 day ago||

https://i.imgur.com/mTyjQXs.png I am still building the "make money app" for some difficult users. :) Last update was calendar integration, everything besides the invoice is a sandbox, kind of like the Unix philosophy of pipes, lots of standalone apps. You are welcome to have a look at https://peterretief.org/ demo demo123 (Not accepting any new users atm, still too raw)

otsaloma 1 day ago||

Trying out vibe-coding (so mostly not even reading the code) a note-taking web app that's essentially a simplified and dirt-cheap to host Workflowy clone. That seems to me like an easily disruptible SaaS in the sense that note-taking is a very generic app, I only use a small part of the feature set of Workflowy and find the price far too high given that. A lot of other vibe-coding around me I see is throw-away junk, but my intention is to actually use this. The frontend is mostly done and working quite nicely already. Sync is then more crucial to get right to avoid data loss and I think I'll review and rewrite myself more of that.

swah 1 day ago|

Is the frontend component from scratch? Must be quite hard to get that right. I wish Dyanlist (from the same talented people who are doing super well with Obsidian...) was open-sourced so we had a good model for outliners.

otsaloma 1 day ago||

Yeah, the frontend is from scratch. Each bullet is just a div contenteditable. The DOM is the state (Claude Code suggested the usual frontend pattern of separate state and rerenders, but I rejected that). Apart from the DOM, content is dumped to local storage. Bullet folding and zooming work mostly just by showing and hiding the bullet divs i.e. the whole note tree is all the time in the DOM. It's conceptually quite simple and Claude Code is good at writing code that traverses the DOM. There's of course a lot of operations like indent/dedent, copy-paste, undo/redo etc. but they've been quite painless to add.

starwatch 1 day ago||

Still working on:

https://www.votivus.org

A hobby project I started putting together late last year; a little spot on the internet for prayer and reflection. I've just shipped a small feature where you get a Bible reading (KJ only for now) in response to a prayer.

https://dugnad.stavanger-digital.no/

A pro bono tech consultancy for local (Stavanger, Norway) non profits. The idea is to help them use tech to better deliver on their mission. Last week I built a little bookmarklet for a non-profit to surface some of their data buried in a SaaS tool ... which will make their apple pressing operation easier.

zimpenfish 1 day ago||

* Reconstructing `$HOME/git` after an unfortunate `rclone sync` wiped it. It was not fun discovering that my backup was on the wrong `git` directory and also that I'd not committed some stuff for ... years. Lesson learned, etc. * Implementing three new bot ideas. * Trying desperately to stay out of the "we must vibecode!" juggernaut's path at work. * Wasting hours having to manually download Every. Single. Model. from my MyMiniFactory library because they don't provide an API, a bulk download, or a sync to something like Dropbox. (1500 down, about 4000 to go!)

davehcker 1 day ago||

Building wireless (LTE-based) sensors for most major horticultural sensing needs. Measurements include:

- CO2. Side note: I was surprised to find that most (all?) CO2 sensors used in closed plant production setups are not meant to operate below 400 ppm.

- Air temperature, pressure, relative humidity

- Photosynthetically Active Radiation (PAR)

- Addons like: wind speed, wind direction, soil moisture and Electrical Conductivity (EC)

- The coolest and most challenging: pH, EC, and flow rate

The hardest part has been running everything on battery while maintaining accuracy and using LTE (2–4G) and not common LPWAN options like LoRa. I'm primarily a software guy, so the learning curve has been huge.

numbers 1 day ago|

I was using Wisper Flow and had a pretty bad experience with their support related to billing and so I started building my own version of a speech to text app, it's very doable with Parakeet and Whisper models available now. I've got the app working on mac and it's been so much easier to make progress on it with AI available now.

I'm not sure I'll be putting it out there because it feels like there's already 100s of these apps out there so I don't feel strongly about it.

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