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OpenCiv3: Open-source, cross-platform reimagining of Civilization III

https://openciv3.org/
624•klaussilveira•12h ago•182 comments

The Waymo World Model

https://waymo.com/blog/2026/02/the-waymo-world-model-a-new-frontier-for-autonomous-driving-simula...
926•xnx•18h ago•548 comments

What Is Ruliology?

https://writings.stephenwolfram.com/2026/01/what-is-ruliology/
32•helloplanets•4d ago•24 comments

How we made geo joins 400× faster with H3 indexes

https://floedb.ai/blog/how-we-made-geo-joins-400-faster-with-h3-indexes
109•matheusalmeida•1d ago•27 comments

Jeffrey Snover: "Welcome to the Room"

https://www.jsnover.com/blog/2026/02/01/welcome-to-the-room/
9•kaonwarb•3d ago•7 comments

Unseen Footage of Atari Battlezone Arcade Cabinet Production

https://arcadeblogger.com/2026/02/02/unseen-footage-of-atari-battlezone-cabinet-production/
40•videotopia•4d ago•1 comments

Show HN: Look Ma, No Linux: Shell, App Installer, Vi, Cc on ESP32-S3 / BreezyBox

https://github.com/valdanylchuk/breezydemo
219•isitcontent•13h ago•25 comments

Monty: A minimal, secure Python interpreter written in Rust for use by AI

https://github.com/pydantic/monty
210•dmpetrov•13h ago•103 comments

Show HN: I spent 4 years building a UI design tool with only the features I use

https://vecti.com
322•vecti•15h ago•143 comments

Sheldon Brown's Bicycle Technical Info

https://www.sheldonbrown.com/
370•ostacke•18h ago•94 comments

Microsoft open-sources LiteBox, a security-focused library OS

https://github.com/microsoft/litebox
358•aktau•19h ago•181 comments

Hackers (1995) Animated Experience

https://hackers-1995.vercel.app/
477•todsacerdoti•20h ago•232 comments

Show HN: If you lose your memory, how to regain access to your computer?

https://eljojo.github.io/rememory/
272•eljojo•15h ago•160 comments

An Update on Heroku

https://www.heroku.com/blog/an-update-on-heroku/
402•lstoll•19h ago•271 comments

Dark Alley Mathematics

https://blog.szczepan.org/blog/three-points/
85•quibono•4d ago•20 comments

Vocal Guide – belt sing without killing yourself

https://jesperordrup.github.io/vocal-guide/
14•jesperordrup•2h ago•6 comments

Delimited Continuations vs. Lwt for Threads

https://mirageos.org/blog/delimcc-vs-lwt
25•romes•4d ago•3 comments

PC Floppy Copy Protection: Vault Prolok

https://martypc.blogspot.com/2024/09/pc-floppy-copy-protection-vault-prolok.html
56•kmm•5d ago•3 comments

Start all of your commands with a comma

https://rhodesmill.org/brandon/2009/commands-with-comma/
3•theblazehen•2d ago•0 comments

Was Benoit Mandelbrot a hedgehog or a fox?

https://arxiv.org/abs/2602.01122
12•bikenaga•3d ago•2 comments

How to effectively write quality code with AI

https://heidenstedt.org/posts/2026/how-to-effectively-write-quality-code-with-ai/
244•i5heu•15h ago•188 comments

Introducing the Developer Knowledge API and MCP Server

https://developers.googleblog.com/introducing-the-developer-knowledge-api-and-mcp-server/
52•gfortaine•10h ago•21 comments

I spent 5 years in DevOps – Solutions engineering gave me what I was missing

https://infisical.com/blog/devops-to-solutions-engineering
140•vmatsiiako•17h ago•63 comments

Understanding Neural Network, Visually

https://visualrambling.space/neural-network/
280•surprisetalk•3d ago•37 comments

I now assume that all ads on Apple news are scams

https://kirkville.com/i-now-assume-that-all-ads-on-apple-news-are-scams/
1058•cdrnsf•22h ago•433 comments

Why I Joined OpenAI

https://www.brendangregg.com/blog/2026-02-07/why-i-joined-openai.html
132•SerCe•8h ago•117 comments

Show HN: R3forth, a ColorForth-inspired language with a tiny VM

https://github.com/phreda4/r3
70•phreda4•12h ago•14 comments

Female Asian Elephant Calf Born at the Smithsonian National Zoo

https://www.si.edu/newsdesk/releases/female-asian-elephant-calf-born-smithsonians-national-zoo-an...
28•gmays•7h ago•11 comments

Learning from context is harder than we thought

https://hy.tencent.com/research/100025?langVersion=en
176•limoce•3d ago•96 comments

FORTH? Really!?

https://rescrv.net/w/2026/02/06/associative
63•rescrv•20h ago•22 comments
Open in hackernews

Show HN: Weather Watching

https://walzr.com/weather-watching
94•walz•7mo ago
I was walking around New York last month during some light rain and noticed about half the people had umbrellas open. When the rain picked up a few minutes later, that number jumped closer to 80%.

It got me thinking it'd be cool to track this somehow, so I built a website! I am taking a sidewalk livestream, feeding it into a YOLO model for people tracking, then sending a frame of each detected person to Gemini 2.0 Flash, which returns structured JSON about each person's clothing and if they're holding an umbrella. I also had fun making the site look like a TV weather channel.

I showed some friends this project and someone mentioned how the legendary Tasks xkcd comic (https://xkcd.com/1425) is out of date now. If you want to check whether a photo has birds in it (or if someone is holding an umbrella), you can just ask an inexpensive vision model for JSON.

Comments

cgsmith•7mo ago
Pretty neat test of image recognition. I don't know why but it bothers me to know that everyone everywhere is being watched by something.
roxolotl•7mo ago
Wild that less than 15 years after Person of Interest it’s so cheap to build such a system we’re using it to decide how to dress for the day.
jackthetab•7mo ago
Cool. Do you have write-up of the technical details or a tutorial on how you did this? I'm not familiar with the tech you mentioned but it'd be interesting to see how it's done and so...easily? cheaply? by non-mega-organizations?
scottmcdot•7mo ago
Yes please, would love this. Feel free to email me from profile. Thanks
keyle•7mo ago
This is cute, I saw someone walk past and the information showed what they were wearing correctly, or as correctly as can be.

For a while there I thought about recording cars driving in my quiet street, by colour, make, try to categorise them... Never got around to setting up the length needed for the camera cable and a good weather proofing solution.

I didn't realise you could get Gemini to respond that fast. We live in the science-fiction times.

What's amusing to me is that if a mugger was going to mug someone in front of the camera, your system would happily report what they're wearing, blissfully ignorant of the situation.

Consider open sourcing this mangled up solution!

okokwhatever•7mo ago
Who cares about privacy anymore, it's a lost battle this days.
1970-01-01•7mo ago
Filming a public street in NYC isn't pushing any limits.
tantalor•7mo ago
Say more about that.

What privacy standard is being broken here?

eber•7mo ago
I've kinda always wanted this.

I now luckily have a window that looks out into the city and I use what other people are wearing as an indicator for what to wear that day. Definitely helpful on the marginal days where it's maybe shorts, maybe pants, maybe light jacket, maybe sweater-weather. Temperature/wind/humidity tell most of the story, but there's cloud cover, wind direction, morning-to-night temperature swings, etc, that make the decision a bit more iffy.

Cool project! I may need to look into doing something similar.

dylan604•7mo ago
Based on the position of the camera and current time of day, the sun is over powering and the camera's exposure adjustment washes out so much detail. If the system is able to determine the information it is trying to discern from that image, I'm impressed. You can't even tell what the sky looks like from this image. I'd try hooding the lens to see if you could get a better image when the sun is shining directly into the lens like this.

What would happen if someone geolocates your camera and just plants a bunch of umbrellas in the frame? Does the counter require the umbrella to be held by a human? What if the same person walks past the camera multiple times? Are they considered unique counts, or are you recognizing people and logging that?

TL;DR how robust is your system against mischievousness?

wiether•7mo ago
Love the idea and made me thought immediately of the song Coton ouaté from Bleu Jeans Bleu!

The song: https://www.youtube.com/watch?v=_whvVXX0hCk A translation of the lyrics: https://lyricstranslate.com/en/coton-ouate-sweater.html

ravdar•7mo ago
this is actually a brilliant idea. I can see it being available in every city around the world in a couple of years
cryptozeus•7mo ago
Love the idea
icameron•7mo ago
Just shows what our assumptions are about attire and culture. Short sleeves 75% and shorts are 62% currently, yet it’s a record high temperatures in NYC. (I know it’s hotter in Saudi Arabia and almost nobody wears shorts there.) The 2% umbrellas must be misidentified parasols.
heeton•7mo ago
I tuned in, and immediately watched a guy wait for his dog to shit, and then pick it up. The internet is a wonder.
Anthony-G•7mo ago
Very cool project that I would have figured to be impossible to do in real-time.

I thought I'd let you know that the web page is rotated to the right on my desktop monitor so I have to tilt my head or drag the browser window to the landscape-oriented monitor. I'm guessing that this is an optimisation for mobile devices but I doubt I'm the only one with a portrait-oriented monitor (viewport dimensions are currently 1200×1779).

alxwrd•7mo ago
> Where is the camera? I won't tell you.

1vLIazn0SQog6ol/6SZBv3hrHT7ADILN78/4KaCM5ShI1E2OQViqjnfCZtJGZCvmZC843+OuzgKMQ9+whTW1XoVxN0cn6XQTCIDTkxjFXZmNvAi65B73bie4ir1kJ5CcQ2Kikxr286a0IhNGZSBvx5+BQYBeXb265b9YxCiboARXdUb81fFV5kRFGUroYKtdSVaiDLiWeryTijWmOFtL2Q==

https://encode-decode.com/encryption-functions/ (`aes-128-cbc`)

Secret hint: three word catch phrase of the shop, all lower case