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

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

#341

Post by tamnd »

I am working on the little book of algorithms: https://github.com/little-book-of/algorithms

A project to implement 1000 algorithms. I have finished around 400 so far and I am now focusing on adding test cases, writing implementations in Python and C, and creating formal proofs in Lean.

It has been a fun way to dive deeper into how algorithms work and to see the differences between practical coding and formal reasoning. The long-term goal is to make it a solid reference and learning resource that covers correctness, performance, and theory in one place.

The project is still in its draft phase and will be heavily edited over the next few months and years as it grows and improves.

If anyone has thoughts on how to structure the proofs or improve the testing setup, I would love to hear ideas or feedback.

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

#343

Post by all2 »

chouchinhua wrote: post #332

Working on an dedicated offline space. Screen device are stored to a locker. Serves coffee and beverages and light food. (There will be a small separate space for occasional screen/internet access in case of need) I've been working on the idea for about a year now. I have put up the funds and set up the corporation. Been busy designing the menu, scouting an ideal location and finding the right front-end staff.

This sounds like my retirement plan: coffee shop + book store. I tend to buy old engineering and mathematics textbooks (my collection has suffered losses through multiple moves, unfortunately) and I find that these are typically overlooked at normal bookstores and even libraries.

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

#344

Post by mrdazm »

block_dagger wrote: post #323
mrdazm wrote: post #188

I’ve got a side project going that’s a browser extension (starting with Safari + Sign in with Apple) intended to add a comment layer to the internet as a whole. I’m calling it Chaffiti ( https://chaffiti.com ). The idea is to enable a comment section on any webpage, right as you’re browsing. Viewing a Zillow listing? See what people are excited about with the property. Wonder what people think about a tourist attract…

Great idea but wouldn’t you run into storage issues pretty quickly without massive budget for large database clusters? The web is a big and constantly changing place. Covering it in useful comments seems prohibitively expensive.

I’ll cross that bridge if I get there! That would be a great problem to have if it sees such interest/usage.

Keep in mind I’d only be storing comments and the references to where they’re posted. I don’t need to know the webpages ahead of time at all.

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

#345

Post by ilusion »

I've struggled with adding evals to my AI agents for last few months, and felt that vibe evals should have a path to building a robust system down the line.

Working on a plugin for langfuse to create evals functions and dataset from ingested traces automatically, based on ad-hoc user feedback.

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

#346

Post by langitbiru »

Franklinjobs617 wrote: post #289

I’m currently building YTVidHub—a tool that focuses on solving a very specific, repetitive workflow pain for researchers and content analysts. The Pain Point: If you are analyzing a large YouTube channel (e.g., for language study, competitive analysis, or data modeling), you often need the subtitle files for 50, 100, or more videos. The current process is agonizing: copy-paste URL, click, download, repeat dozens of t…

I did consider building a tool like this before I pivot to something else. I'm learning materials in Chinese Mandarin language from a YouTube playlist. NotebookLLM doesn't support Chinese language yet so you must make sure your app supports Chinese Mandarin so I can use it. :)

A way to find specific materials would be nice. Think of converting the whole playlist into something like RAG then you can search anything from this playlist.

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

#347

Post by mrdazm »

shlomo_z wrote: post #225
mrdazm wrote: post #188

I’ve got a side project going that’s a browser extension (starting with Safari + Sign in with Apple) intended to add a comment layer to the internet as a whole. I’m calling it Chaffiti ( https://chaffiti.com ). The idea is to enable a comment section on any webpage, right as you’re browsing. Viewing a Zillow listing? See what people are excited about with the property. Wonder what people think about a tourist attract…

What an idea!

More than that. It’s past proof of concept! Now to just build out the bits to get it to pass app review…
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