Ask HN: What Are You Working On? (December 2025)

thecutline.ai , a Product Management Suite. I call it "A Product Manager That Says No", which stems from previous challenges I had using AI that was too sycophantic and optimistic to help with product decisions.

Working heavily right now on Customer Personas to use in validating/invalidating , which are configured with viewpoints, biases, and tendencies. Coming very soon will be Persona Journeys, in which you can get live, goal-oriented evaluation of your web app by a Persona.

Refresh Agent is an AI Agent for SEO and Marketing Analysis.

If you've ever tried to use Google Analytics (GA4) and Google Search Console (GSC) to figure out what's working with your marketing, and what to do next to grow, you have probably got frustrated at some point.

It acts as a Marketing Strategist. You can ask questions like "why is my SEO traffic down this week" and it will give you a clear answer based on your site's performance data, as well as a checklist to improve.

https://refreshagent.com

Working on promptfoo, an open-source (MIT) CLI and framework for eval-ing and red-teaming LLM apps. Think of it like pytest but for prompts - you define test cases, run evals against any model (OpenAI, Anthropic, local models, whatever), and catch regressions before they hit prod.

Currently building out support for multi-agent evals, better tracing, voice, and static code analysis for AI security use cases. So many fun sub-problems in this space - LLM testing is deceptively hard.

If you end up checking it out and pick up an issue, I'll happily send swag. We're also hiring if you want to work on this stuff full-time.

https://github.com/promptfoo/promptfoo

Still working on Librario, a simple book metadata aggregation API written in Go. It fetches information about books from multiple sources, merges everything intelligently, and then saves it all to a PostgreSQL database for future lookups.

You can think of it as a data source, or a knowledgeable companion that can provide comprehensive book information for online booksellers, libraries, book-related startups, bookworms, and more.

I got a pre-alpha build running for those that want to test it out and the code is out on SourceHut[1].

Been really tough to find time to work on it because I have a baby that only sleeps in my lap, but I’m making progress very slowly.

I recently hired someone to rewrite the entire database layer, as that was written with the help of an LLM for the prototype, which should improve things too.

Feedback is very welcome :)

[1]: https://sr.ht/~pagina394/librario/