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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)

#511

Post by tamnd »

kragen wrote: post #378
tamnd wrote: post #341

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 reasonin…

That's a cool project! I feel like the presentation of Lomuto's algorithm on p.110 would be improved by moving the i++ after the swap and making the corresponding adjustments to the accesses to i outside the loop. Also mentioning that it's Lomuto's algorithm. These comments are probably too broad in scope to be useful this late in the project, so consider them a note to myself. C as the language for presenting the al…

To reduce the current monomorphism, I might add a generic version using void* and a comparator, or generate code for a few key types, while keeping the simple monomorphic listings for readability. (Though this would make the code a bit more complex)

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

#512

Post by quaintdev »

nhatcher wrote: post #429

I am working on https://www.ironcalc.com , a spreadsheet engine. I have been working on it for the last two years as a side project, but starting March will be my full time job! Kind of excited and scared at the same time

This looks great! r/selfhosted will love this.

Could you please provide a Docker image?

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

#515

Post by tamnd »

kragen wrote: post #378
tamnd wrote: post #341

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 reasonin…

That's a cool project! I feel like the presentation of Lomuto's algorithm on p.110 would be improved by moving the i++ after the swap and making the corresponding adjustments to the accesses to i outside the loop. Also mentioning that it's Lomuto's algorithm. These comments are probably too broad in scope to be useful this late in the project, so consider them a note to myself. C as the language for presenting the al…

For visualization, I'm considering using the awesome Manim library by 3Blue1Brown (https://3b1b.github.io/manim/getting_started/quickstart.html). I'm not very good at visual design, but let see what I can come up with.

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

#516

Post by rhubarbtree »

bastien-barn wrote: post #405

I am working on Tiny Finch, a livechat connected with Slack. There is nothing special comparing to other livechats, the goals is to offer an affordable and unlimited livechat for small projects and companies. https://tinyfinch.chat

Intercom is awful. There is a huge market here, and chatwoot haven’t done a great job.

Our company would love a well designed chat button linked to Slack, combined with a helpdesk that supports email queries and also allows people to raise issues via the web.

That’s it, that’s all we need. Happy to pay.

It’s hard to express how badly intercom is designed and engineered. It’s also very expensive and constantly upsold, despite being rubbish. If no one fixes this it will be my next startup.

Too many companies have gone down the road of “AI support”, without understanding that AI must rest on the foundation of great infrastructure. Intercom are pushing their AI so hard it’s absolutely infuriating.

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

#517

Post by bandana »

I'm making an OpenAI API proxy to stay within a spending limit (like 1$ per hour then a 429), AFAIK they only support "budget alerts" and I'm not comfortable releasing anything without a hard limit on the spend. https://github.com/goverture/goxy - Still a work in progress, I plan to support streaming as well and might support other providers if there's a demand for it.

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

#518

Post by WilcoKruijer »

I’ve noticed that a lot of work is duplicated across projects that use the same libraries or SDKs (e.g., Stripe). Developers write a lot of glue code to shuffle data between the Stripe API and the app’s frontend or admin dashboard, as well as to handle incoming webhooks and persist data to the app’s database.

That’s why I’ve been building 'Fragno', a framework for creating full-stack libraries. It allows library authors to define backend routes and provides reactive primitives for building frontend logic around those routes. All of this integrates seamlessly into the user’s application.

With this approach, providers like Stripe can greatly improve the developer experience and integration speed for their users.

https://fragno.dev

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

#519

Post by paulmbw »

We’re working on Fibre - secure file uploads for Intercom/Crisp, and uploads sent straight to your storage.

I noticed a gap - our customers are required to upload sensitive documents but often hesitate at the thought of uploading documents in the intercom/crisp interface, citing privacy concerns.

I thought, how difficult would it be to build an app that sends documents to your own Google drive - turns out it’s very easy. In a week, we built an app that renders an iframe in the intercom chat interface and sends documents straight to our google drive folder, bypassing intercom all together.

We’re now investigating uploading to s3 or azure blob storage and generating summaries of documents that are sent to the intercom conversation thread so ops teams can triage quicker.

Let me know what you think!

https://www.fibrehq.com/

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