Ask HN: What are you working on? (September 2025) • Hacker News Board

Re: Ask HN: What are you working on? (September 2025)

#861

Post by takkatakka » Tue, Sep 30, 2025, 9:11 PM UTC

Working on a session recording app: https://scryspell.com

Currently it's meant to help devs fix UI and UX issues by seeing exactly what their users saw, including a log of the browser console and network traffic.

I say currently because it has preset analytics (charts for top entry page, top exit page, etc) but am working on letting users define their own trend and funnel charts. That will open it up to basic web/product analytics.

The goal is to be simple analytics + session recording w/ masking.

TechStack:

UI: React, ReactQuery, TypeScript

Backend: Java, SpringBoot, jOOQ, PostgreSQL

Using rrweb for the session recording.

Re: Ask HN: What are you working on? (September 2025)

#862

Post by drio » Tue, Sep 30, 2025, 9:33 PM UTC

I'm writing a minimal, educational WireGuard implementation to practice networking and cryptography: https://github.com/drio/miniwg. It's still in heavy development, but it's been a great learning experience. I've already been able to create tunnels between two miniwg instances and between miniwg and Jason's WireGuard from the Linux kernel.

Before that I wrote: https://github.com/drio/unboxing, a c/webassembly implementation of Danielle Navarro's beautiful IFS fractals.

Re: Ask HN: What are you working on? (September 2025)

#863

Post by nyantaro1 » Tue, Sep 30, 2025, 9:33 PM UTC

stevepotter wrote: post #716

nyantaro1 wrote: post #532

Earlier quoted context omitted.

This sounds awesome! Can you tell me more about what kind of expertise do you need to develop such a system? As in the most important knowledge one most have to be able to work on such a thing

Thanks, buddy! I'm having fun. There are a few sides to it. There are the actual physical surgical tools that you have to design, test, and manufacture. Then there's the robot that adjusts those tools. That stuff is a lot of CAD and 3D printing. The camera is a big deal and it's a ton of work to get that right. Then of course you have all the software, which is a slew of computer vision models that operate on a local…

That seems like a long journey. I think playing with Arduino is a perfect way to get started on the interaction between software-hardware. Thanks a lot for your answer!

Re: Ask HN: What are you working on? (September 2025)

#864

Post by kebsup » Tue, Sep 30, 2025, 9:42 PM UTC

eps wrote: post #755

kebsup wrote: post #648

I'm working on spaced-repetition language flashcards app, that shows you variety of card types (sentences, reverse, audio, definition...) and allows you to add vocabulary from content - youtube, ebooks, website reader. ios: https://apps.apple.com/us/app/vocabulary-flashcards-vocabuo/... android: https://play.google.com/store/apps/details?id=world.petr.vok...

Damn, another baseless subscription.

What’s baseless about it? The yearly subscription price is like 20 minutes of work for programmers and many users are spending tens of hours on the app.

Re: Ask HN: What are you working on? (September 2025)

#865

Post by eps » Tue, Sep 30, 2025, 9:46 PM UTC

scary-size wrote: post #482

Building a little dashboard for our solar system. Running on a mini PC in the office closest. Bun, React, DuckDB https://solar.franz.hamburg/

... solar power system.

Though a dashboard for the Solar system would've been neat to see too :)

Re: Ask HN: What are you working on? (September 2025)

#866

Post by eps » Tue, Sep 30, 2025, 9:54 PM UTC

ahmedgmurtaza wrote: post #656

I am building https://arabicworksheet.com v2.0 for foreigners to learn Saudi Arabic and speak like natives in days!

"in days" sounds exceedingly unrealistic.

Re: Ask HN: What are you working on? (September 2025)

#867

Post by genkoph » Tue, Sep 30, 2025, 10:22 PM UTC

epolanski wrote: post #102

genkoph wrote: post #52

I built an alternative to the Typescript package "neverthrow" called "no-exceptions" I found neverthrow's api to be not very ergonomic so I built my own little version. https://www.npmjs.com/package/no-exceptions

Serious question, not dismissing any of your work but why implement it yourself when there's plenty of such implementations in TS land already. fp-ts has an Either type e.g. but there's plenty of such libraries. https://gcanti.github.io/fp-ts/modules/Either.ts.html

Hi, no worries, I understand your question.

I thought that most of the use cases for such a library could be boiled down to a single function that can wrap throwable pieces of code and convert their result to a Result type and that's exactly what I implemented.

I also wanted minimal amount of methods for the Result variant classes and delightful method names so I tried to do that and I'm happy with the results! (no pun intended)

It's just a little side project, not much thought has been put inside of it except the core idea behind it that I just explained.

Re: Ask HN: What are you working on? (September 2025)

#868

Post by reincoder » Tue, Sep 30, 2025, 10:33 PM UTC

asteroidburger wrote: post #455

coreylane wrote: post #452

I've been building https://resolver.one - a DNS server that returns GeoIP data as TXT records. Query an IP directly as the hostname (e.g. dig TXT 8.8.8.8.rslvr.one) and get back country, ASN, etc. Always been fascinated by repurposing established protocols for unintended uses - DNS is everywhere, passes through firewalls, and has built-in caching. Seemed like a fun way to deliver location data without HTTP APIs. Supe…

Neat idea, even if it doesn't end up going anywhere. Out of curiosity, are you able to share what your source of data is? Isn't GeoIP data typically licensed?

I work for IPinfo, focusing on data adoption and supporting the wider use of our free services.

The dataset the user is accessing (IPinfo Lite) is licensed under CC-BY-SA 4.0 and does not come with an End User License Agreement (EULA).

Most free IP geolocation databases in the market do include restrictive EULAs. These usually require each individual user to register, obtain their own copy of the database, and limit usage to themselves only. In many cases, sharing the data or keys outside of the original intended scope is considered a violation of license agreement. Because of these restrictions, some providers also offer paid redistribution licenses, which can be expensive and typically targeted at enterprises.

Our approach is different. By licensing IPinfo Lite under CC-BY-SA 4.0 WITHOUT an EULA, we allow anyone to share or redistribute the data freely, as long as proper attribution is given. The goal is twofold:

  - Make it easier for projects to use the data without legal barriers.
  - Ensure that any questions or issues about the data are directed to us rather than to project maintainers.

Some large open-source projects, major global enterprises, and governement institutes are already using IPinfo Lite right now.

Re: Ask HN: What are you working on? (September 2025)

#869

Post by agentcooper » Tue, Sep 30, 2025, 10:38 PM UTC

Playing around with Rust, WebAssembly, and WASI. Made a formatter for Tree-sitter queries: https://github.com/agentcooper/tree-sitter-query-formatter.

Re: Ask HN: What are you working on? (September 2025)

#870

Post by deepvibrations » Tue, Sep 30, 2025, 10:46 PM UTC

vasilzhigilei wrote: post #344

https://pleasetrymyapp.com I've been working on a map that shows which neighborhoods in a city are nice/not nice with a short description. Whenever I visit a new city, just looking at Google Maps is pretty meaningless - it's just a bunch of gray land and streets. I end up looking up Reddit posts for where to go, searching for crime maps, trying to find annotated maps, etc. to get a better idea of where to visit in a…

Very cool idea, accurate for London & Bristol.