I'm continuing the work on Cellm, an Excel extension that let's you call LLMs in cell formulas like =PROMPT(A1, "Rate the sentiment of the customer feedback as positive, neutral, or negative"), and then drag the formula down to apply the same prompt to thousands of rows. I built it after my girlfriend had to manually classify 7,500 research papers. Cellm automates that kind of repetitive work. Since we added MCP and…
Ask HN: What are you working on? (July 2025)
511–520 of 900 posts
Re: Ask HN: What are you working on? (July 2025)
#512But I'm focused on building a good reading experience overall - which helps you learn and understand the content more easily. Imagine Macos preview integrated with llms. Currently, the web app uses the llm apis but eventually will add support for local llms as well.
I'm aware of other apps that have done something similar, but want to see this through for myself.
Re: Ask HN: What are you working on? (July 2025)
#513Re: Ask HN: What are you working on? (July 2025)
#514I’m working on a free & open-source invoice generator: - Live PDF preview - 100% client-side - No sign-up required - Includes a Stripe-style invoice template - Built with modern web tech – simple to self-host or fork Repo: https://github.com/VladSez/easy-invoice-pdf Demo: https://easyinvoicepdf.com Would love feedback, contributions, or ideas for other templates/features!
Seems to work well. The live preview workflow is nice. I like data URLs but not sure how other people feel handling several-hundred character URLs. Only minor gripe is that the "support my work" popup is a bit aggressive.
The long URL is a compromise that lets the service work without requiring sign-ups or storing user data.
I’ll definitely try to make the “support my work” popup less aggressive.
Re: Ask HN: What are you working on? (July 2025)
#515Given a database[1] and a set of DDL statements/migrations you want to check, pglockanalyze will open a transaction, execute the statements, read the pg_locks view to analyze the locks they acquire and rollback (or commit, depending on the flags you passed) the transaction. Then, it will output the results for each statement.
I think there's merit in this idea, that said it's very much an experiment so there could be flaws and/or corner cases that this strategy won't work well for.
It's meant to act as a complement, not a replacement, to things like static analysis and the official Postgres docs.
https://github.com/agis/pglockanalyze
[1] typically an ephemeral database spawned by your CI pipeline
Re: Ask HN: What are you working on? (July 2025)
#516Working on https://ts.coach , a free guide to Typescript that runs entirely in the browser.
Re: Ask HN: What are you working on? (July 2025)
#517Re: Ask HN: What are you working on? (July 2025)
#518It's a motivated video introduction to Elliptic curve arithmetic where in 10 minutes we write (in the C language) a legal bitcoin wallet bruteforcer.
Video edit: https://leetarxiv.substack.com/p/a-programmers-introduction-... Bruteforce bitcoin puzzle wallet in C : https://leetarxiv.substack.com/p/hacking-dormant-bitcoin-wal...
Re: Ask HN: What are you working on? (July 2025)
#519Re: Ask HN: What are you working on? (July 2025)
#520Bit of context, I have background building authentication systems and almost all the time its built as just another feature even though its THE FEATURE which gates all other features.