frontpage.
newsnewestaskshowjobs

Made with ♥ by @iamnishanth

Open Source @Github

fp.

Affinity Studio now free

https://www.affinity.studio/get-affinity
514•dagmx•4h ago•404 comments

The ear does not do a Fourier transform

https://www.dissonances.blog/p/the-ear-does-not-do-a-fourier-transform
205•izhak•3h ago•74 comments

Jujutsu at Google [video]

https://www.youtube.com/watch?v=v9Ob5yPpC0A
51•Lanedo•7h ago•12 comments

TruthWave – A platform for corporate whistleblowers

https://www.truthwave.com
31•mannuch•1h ago•9 comments

Minecraft HDL, an HDL for Redstone

https://github.com/itsfrank/MinecraftHDL
49•sleepingreset•1h ago•5 comments

Springs and bounces in native CSS

https://www.joshwcomeau.com/animation/linear-timing-function/
33•feross•2d ago•3 comments

987654321 / 123456789

https://www.johndcook.com/blog/2025/10/26/987654321/
418•ColinWright•4d ago•77 comments

Launch HN: Propolis (YC X25) – Browser agents that QA your web app autonomously

https://app.propolis.tech/#/launch
69•mpapazian•4h ago•18 comments

Show HN: I made a heatmap diff viewer for code reviews

https://0github.com
117•lawrencechen•6h ago•33 comments

Free software scares normal people

https://danieldelaney.net/normal/
288•cryptophreak•5h ago•208 comments

Learn Multiplatform Z80 Assembly Programming with Vampires

https://www.chibiakumas.com/z80/
29•surprisetalk•4d ago•2 comments

Independently verifying Go's reproducible builds

https://www.agwa.name/blog/post/verifying_go_reproducible_builds
65•speckx•1d ago•2 comments

NPM flooded with malicious packages downloaded more than 86k times

https://arstechnica.com/security/2025/10/npm-flooded-with-malicious-packages-downloaded-more-than...
49•jnord•20h ago•16 comments

Taking money off the table

https://zachholman.com/posts/money-off-the-table
61•holman•1h ago•57 comments

Some people can't see mental images

https://www.newyorker.com/magazine/2025/11/03/some-people-cant-see-mental-images-the-consequences...
89•petalmind•2h ago•193 comments

Israel demanded Google and Amazon use secret 'wink' to sidestep legal orders

https://www.theguardian.com/us-news/2025/oct/29/google-amazon-israel-contract-secret-code
422•skilled•1d ago•158 comments

Zig's New Async I/O

https://andrewkelley.me/post/zig-new-async-io-text-version.html
178•todsacerdoti•1d ago•49 comments

ZOZO's Contact Solver for physics-based simulations

https://github.com/st-tech/ppf-contact-solver
50•vintagedave•5h ago•26 comments

I have released a 69.0MB version of Windows 7 x86

https://twitter.com/XenoPanther/status/1983477707968291075
86•rvnx•2h ago•39 comments

Show HN: Run a GitHub Actions step in a gVisor sandbox

https://github.com/geomys/sandboxed-step
12•FiloSottile•6d ago•0 comments

Show HN: In a single HTML file, an app to encourage my children to invest

https://roberdam.com/en/dinversiones.html
163•roberdam•10h ago•312 comments

US declines to join more than 70 countries in signing UN cybercrime treaty

https://therecord.media/us-declines-signing-cybercrime-treaty?
260•pcaharrier•6h ago•169 comments

Show HN: Meals You Love – AI-powered meal planning and grocery shopping

https://mealsyoulove.com
10•tylertreat•3d ago•7 comments

Tweakcc

https://github.com/Piebald-AI/tweakcc
8•handfuloflight•1w ago•0 comments

Qt Creator 18 Released

https://www.qt.io/blog/qt-creator-18-released
106•jrepinc•4h ago•15 comments

Frozen DuckLakes for Multi-User, Serverless Data Access

https://ducklake.select/2025/10/24/frozen-ducklake/
35•g0xA52A2A•5d ago•2 comments

Estimating the perceived 'claustrophobia' of New York City's streets (2024)

http://mfranchi.net/posts/claustrophobic-streets/
56•jxmorris12•7h ago•52 comments

Replacing EBS and Rethinking Postgres Storage from First Principles

https://www.tigerdata.com/blog/fluid-storage-forkable-ephemeral-durable-infrastructure-age-of-agents
86•mfreed•1d ago•41 comments

PlanetScale Offering $5 Databases

https://planetscale.com/blog/5-dollar-planetscale
33•ryanvogel•5h ago•2 comments

Aisuru botnet shifts from DDoS to residential proxies

https://krebsonsecurity.com/2025/10/aisuru-botnet-shifts-from-ddos-to-residential-proxies/
12•feross•1d ago•1 comments
Open in hackernews

Launch HN: Propolis (YC X25) – Browser agents that QA your web app autonomously

https://app.propolis.tech/#/launch
69•mpapazian•4h ago
Hi HN, we're Marc and Matt, and we're building Propolis (app.propolis.tech/#/launch). We use browser agents to simulate users in order to report bugs and write e2e tests. Today, you can launch 10s-100s of agents that collaboratively explore a website and report back on pain points + propose e2e tests that can run as part of your CI.

You can try an initial run (two minute set up) to get a feel for the product for free here: app.propolis.tech/#/launch. Or watch our demo video: https://www.tella.tv/video/autonomous-qa-system-walkthrough-...

The Problem

Both Matt and I have been thinking about software quality for the last 10 years. While at Airtable Matt worked on the infrastructure team responsible for deploys and thought a lot about how to catch bugs before users did. Deterministic tests are incredibly effective at ensuring pre-defined behavior continues to function, but it's hard to get meaningful coverage & easy to "stub/mock" so much that it's no longer representative of real usage.

I like to pitch what we're building now as a set of “users” you can treat like a canary group without worrying about impacting real users.

What we do: Propolis runs "swarms" of browser agents that collaborate to come up with user journeys, flag points of friction, and propose e2e tests that can then be run more cheaply on any trigger you'd like. We have customers from public companies to startups running "swarms" regularly to massively increase the breadth of their automated testing + running the produced tests as part of their CI pipeline to ensure that more specific flows stay working without needing to worry about updating playwright/selenium tests.

One thing that really excites me about this approach is how flexible "checks" can be since they're evaluated partially via LLM, for example we've caught bugs related to the quality of non-deterministic output (think a shopping assistant recommending a product that the user then searches for and can’t find).

Pricing and Availability

It's production-ready today at $1000/month unlimited-use + active support for early users willing to give feedback and request features. We're also happy to work with you for capped-use / hobby plans at lower prices if you'd like to use it for smaller or personal projects.

We'd love to hear from the HN community - especially curious if folks have thoughts on what else autonomous agents could validate beyond bugs and functional correctness. Try it out and let us know what you think!

Comments

ttamslam•3h ago
Hey I'm Matt! Really excited to answer any questions.

To elaborate a little bit on the "canary" comment --

For a while at Airtable I was on the infra team that managed the deploy (basically click run and then sit and triage issues for a day), One of my first contributions on the team was adding a new canary analysis framework that made it easier to catch and rollback bugs automatically. Two things always bothered me about the standard canary release process:

1) It necessarily treats some users as lower value, and thus more acceptable to risk exposing bugs to (this makes sense for things like free-tier, etc. but the more you segment out, the less representative and thus less effective your canary is). When every customer interaction matters (as is the case for so many types of businesses) this approach is harder to justify

2) Low frequency / high impact bugs are really difficult to catch in canary analysis. While it’s easy to write metrics that catch glaring drops/spikes in metrics, more subtle high impact regressions are much harder and often require user reports (which we did not factor in as part of our canary). Example: how do you write a canary metric that auto rolls back when an enterprise account owner (small % of overall users) logs in and a broken modal prevents them from interacting with your website.

I view what we’re building at Propolis as an answer to both of these things. I envision a deploy process (very soon) that lets us roll out to simulated traffic and canary on THAT before you actually hit real users (and then do a traditional staged release, etc.)

mritchie712•3h ago
I've been looking for this exact thing. A couple questions:

Are your agents good at testing other agents? e.g. I want your agent to ask our agent a few questions and complete a few UI interactions with the results.

How do you handle testing onboarding flows? e.g. I want your agent to create a new account in our app (https://www.definite.app/) and go thru the onboarding flow (e.g. add Stripe and Hubspot as integrations).

ttamslam•3h ago
> Are your agents good at testing other agents? e.g. I want your agent to ask our agent a few questions and complete a few UI interactions with the results.

I'd say this is one of our strong suits I think, specifically the UIs tend to be easy to navigate for browser agents, and the LLM as a judge offers pretty good feedback on chat quality and it can inform later actions. (I'd be remiss not to mention though that a good LLM eval framework like Braintrust is probably the best first line though)

> How do you handle testing onboarding flows?

We can step through most onboarding flows if you start from logged out state & give the context it'll need (i.e. a stripe test card, etc.) That said though, setting up integrations that require multi-page hops is still a pain point in our system and leaves a lot to be desired.

Would love to talk more about your specific case and see if we can help! founders@propolis.tech

8note•3h ago
fraud/abuse/compliance is a good usecase for this kinda thing - an abuse vector is kinda like a bug, except that the system does what its expected to do.

testing for abuse stuff ive always found quite difficult, since to work well, you need to both create some real resources so you can delete/clean them up, and also you need to create a new test identity, since your abuse detection system should be deny listing found bad actors. the difficulty is that those sessions probably want to be open for like a week, so they can process both payments and refunds.

can the agents check their email? other notification methods?

ttamslam•3h ago
This is interesting, I think we've shied away a bit from security-ish use cases since it's outside of our personal core competencies, do you have examples of what tools exist today for catching things like that? Or is it totally adhoc?

> can the agents check their email? other notification methods?

Yes to email (for paying customers agents spin up with unique addresses), no to other notifications, but as soon as a paying customer has a use case for SMS, etc. we'll build it.

dfsegoat•3h ago
OTP protected flow verification
dfsegoat•3h ago
Really good call out re: email and other 'side-flows' - hopefully there is integration with something like Mailosaur.

https://mailosaur.com/email-testing

rvz•2h ago
Looks like a great idea. Does this fully automate QA testing of websites including removing the human in the loop during testing?

Once again, great product.

mpapazian•2h ago
Great question! The swarm takes a first pass to generate tests and can continuously add as it runs again over time.

In the off chance it misses specific tests - we have tools to let you build them directly with ai support, either by giving them objectives or dropping in a video of the actions you're taking!

mhb•2h ago
Good video, but it looks like it plays twice. Should be ~3.5 minutes...
mpapazian•2h ago
ah good catch! Fixed :)
ekarabeg•1h ago
This seems really interesting. I tried running a swarm on my landing page but didn't get a completed email. I'll try it again, though!
mpapazian•1h ago
hi! Looking at your swarm results, you might not have given the swarm login credentials to use, which is why most of the runs are failing out. Please feel free to try it again and give them access.
GeorgyM•1h ago
Sounds interesting. Is this handling mobile as well?
mpapazian•1h ago
We don't handle mobile yet, but we might get to it at a future date!
cloudflare728•1h ago
Can it find broken UI?

Human can find and report broken UI easily by using common sense.

Even though it is simple for human. Computer has no common sense and I am a machine learning expert. I tried and mostly failed to build a broken UI detector in my previous company. They had automated plugin upgradable process. That periodically broke UI.

I tried to detect it my taking long screenshot, and you could select a image as working version, then later finding diff between 2 images. I kind of worked but not satisfactory.

mpapazian•56m ago
The agents can definitely detect when something is off, given they're using VLMs. They don't necessarily compare it to previous versions, rather they have opinionated takes on whether something looks broken / off. So - yes!
orliesaurus•50m ago
Does it output playwright scripts?