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janpio

6,975 karma · joined October 25, 2007

Product @ Omnia. Prev. Prisma ORM, Fastlane, Gameforge
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janpio··on Implementing Soft Deletion in Prisma with Client Extensions
It took me far to long to understand your pun for (8)... :)

Out of curiosity: How does this deal with referential actions? (See https://www.prisma.io/docs/orm/prisma-schema/data-model/rela...)

janpio··on Bullying Is Not Innovation
Related to this: https://news.ycombinator.com/item?id=45814461
janpio··on AI's Dial-Up Era
> I hope you got those chicks on Substack clapping for you, at least. Fast lane to getting laid for sure.

What is this about? Weird thing to say.

janpio··on Show HN: Product analytics with zero instrumentation (using vision models)
Instant feedback: Make it clearer where session replays can come from. I scrolled through the page looking for some product logos. Only found it when actually reading through the page.
janpio··on Show HN: Quibbler – A critic for your coding agent that learns what you want
The demo video in the GH page didn't work for me, but there is also one on Twitter/X: https://xcancel.com/fulcrumML/status/1984054489851310191
janpio··on Vibe-Spec: Generate Specifications from Coding Agent Logs
Have you tried to "vibe recreate" one of your projects based on the generated spec?
janpio··on Grammarly rebrands to 'Superhuman,' launches a new AI assistant
Data point 1: They get a TechCrunch post out of it.
janpio··on Show HN: 'Elon's X page without politics': LLM-based content filtering in Chrome
Interesting extension, have been thinking about building something similar for ages.

Shame that none of the built-in AI Chrome started to ship works for this: https://developer.chrome.com/docs/ai/built-in

janpio··on Show HN: My bootstrapped startup for co-parents was just featured in WIRED
Interesting project.

Can you share a bit of the SEO aspect of your marketing?

janpio··on FingerprintJS version 5.0 now MIT licensed
NPM has public download numbers, which can be used as a proxy for popularity and usage of library. The 2023 change is clearly visible: https://npmtrends.com/@fingerprintjs/fingerprintjs (Switch to "All time") Interestingly, it seems the downloads picked up earlier in 2025 again...
janpio··on FingerprintJS version 5.0 now MIT licensed
What allows them to switch back is hidden in the accordion at the bottom:

   Why are you making FingerprintJS v5.0 available under an MIT license now?
   [...]
   We have made substantial improvements to Fingerprint Pro so that competitors relying on FingerprintJS for browser fingerprinting is no longer a concern.
Comparison seems to be at https://fingerprint.com/github/, scroll to bottom for "Feature comparison" table.
janpio··on If You Need a New UI for Every AI Use Case, You're Doing It Wrong
Actual title: "The New Bottleneck in Agentic Systems: Domain Knowledge Capture"
janpio··on The Argument for Letting AI Burn It All Down
> There are many ways to forecast when a technology is becoming normal—price-to-earnings ratios and other boring stuff. The metric I use is the C/B ratio: conferences to blogging. If people are steadily attending conferences about a subject, it is not normal yet. If they’re mostly blogging about it, it is. I made this up, but I assure you it’s predictive.

Yeah, that sounds true.

janpio··on Show HN: Rethinking the Interface for Vibe Coding
I like the idea and execution.

Pretty similar to https://x.com/vibekanban/status/1975982415047950616 + https://github.com/BloopAI/vibe-kanban

janpio··on The GPL, the App Store, and You
(2011)
janpio··on Against SQL (2021)
(2021)
janpio··on Ask HN: Why do my friends' users hate the product? Is it worth finding out?
Sessions are just one "channel" to build up an understanding of the problem, so I try to prioritize the ones where I have prior indication that they might be interesting (churn, complaints in a conversation or feedback via some other channel). But sometimes it can also be interesting to just "surf" through some random ones.
janpio··on Ask HN: Why do my friends' users hate the product? Is it worth finding out?
I would find it _very_ valuable.

But I think this is also the hardest task of a PM, so I am skeptical. There is a lot less learning and training material for an AI to use (compared to for example writing code) - so it is no surprise that AI in its current state does often not lead to great results.

janpio··on Ask HN: How did you scale AI development?
Getting the agent to run tests definitely can have a very positive impact - it can actually realize itself that it broke something unrelated, and fix it (or easily be prompted if it gives up anyway).

Aside: I often remove some of the tests that seem superfluous to me, or explicitly ask for the minimal set of tests that still cover the functionality in the first place. Some models definitely can go "all in" on tests like a very eager intern that just learned about testing. For your cases where after a prompt you end up with broken functionality, just having an integration test that fails when the functionality breaks, might be enough.

janpio··on Ask HN: Why do my friends' users hate the product? Is it worth finding out?
Ok, then I underestimated your question a bit. Sorry.

In my personal experience (as a PM and working in software development), there are loads of ways to get data already. The bottleneck is processing and understanding that data to come to hypotheses and conclusions.

(Recently with AI there are some product that promise to help with that, but I have no personal revolutionary positive experiences with them.)

janpio··on Code Like a Surgeon
Previous submission that HN did not catch to deduplicate: https://news.ycombinator.com/item?id=45695621
janpio··on Ask HN: How did you scale AI development?
Is the breaking functionality fully covered with tests, and the agent can and does run those tests when adding or changing things already? If not, that would be a promising approach to help the AI to not mess up. If yes, can that loop be further tightened to support the AI?
janpio··on Ask HN: Why do my friends' users hate the product? Is it worth finding out?
A Product Manager would probably try talking to some of these users. Surprisingly often a bunch of conversations will already give a rough idea what might be going on - which then could be confirmed with another look at the session recordings or other existing data.

Or is that now what you are asking?

janpio··on The app I built to launch my app
> So basically I built a link tree which alerts people by text when new links are posted. These links are framed as tasks for my friends to complete, such as "like a tweet". If you complete tasks you earn points to get merch.

Wouldn't it make sense to add that information to the site itself? Without your comment here, I would have had no idea at all what this is about.

janpio··on Fedora Council approves AI-assisted contributions policy
Better link probably: https://discussion.fedoraproject.org/t/council-policy-propos... (Links directly to msg about decision, not just the "page" it is on in the discussion)
janpio··on Next.js AI Model Performance Evaluations
Launch tweet with some context and future plans: https://x.com/rauchg/status/1981037270624076092
janpio··on We Raised $5.7M to Launch Cto.new Completely for Free
(Actual domain is cto.new, but Hacker News seems to look at the `canonical` link tag to update the domain :shrug:)
janpio··on Amp Free
This submission didn't get picked up, but I still wanted to leave a link to this Cline April Fools joke that someone on Twitter/X dug up: https://x.com/cline/status/1907235395018088727

There is also quite a bit of general discussion about Amp Free in the replies and feeds of the Amp related people on Twitter/X that might be interesting to look at.

janpio··on Zed is now available on Windows
These ones actually: https://github.com/microsoft/winget-pkgs/issues/304075
janpio··on Zed is now available on Windows

  > winget search zed
  Name                             Id                                Version     Match                             Source
  -----------------------------------------------------------------------------------------------------------------------
  Zed Preview                      ZedIndustries.Zed                 0.208.4-pre Moniker: zed                      winget
So not fully updated yet it seems.
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