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The chaos in the US is affecting open source software and its developers

https://www.osnews.com/story/144348/the-chaos-in-the-us-is-affecting-open-source-software-and-its...
1•sanqui•1m ago•0 comments

Trying to make an Automated Ecologist: A first pass through the Biotime dataset

https://chillphysicsenjoyer.substack.com/p/trying-to-make-an-automated-ecologist
1•crescit_eundo•3m ago•0 comments

Watch Ukraine's Minigun-Firing, Drone-Hunting Turboprop in Action

https://www.twz.com/air/watch-ukraines-minigun-firing-drone-hunting-turboprop-in-action
1•breve•4m ago•0 comments

Free Trial: AI Interviewer

https://ai-interviewer.nuvoice.ai/
1•sijain2•4m ago•0 comments

FDA Intends to Take Action Against Non-FDA-Approved GLP-1 Drugs

https://www.fda.gov/news-events/press-announcements/fda-intends-take-action-against-non-fda-appro...
2•randycupertino•5m ago•0 comments

Supernote e-ink devices for writing like paper

https://supernote.eu/choose-your-product/
1•janandonly•8m ago•0 comments

We are QA Engineers now

https://serce.me/posts/2026-02-05-we-are-qa-engineers-now
1•SerCe•8m ago•0 comments

Show HN: Measuring how AI agent teams improve issue resolution on SWE-Verified

https://arxiv.org/abs/2602.01465
2•NBenkovich•8m ago•0 comments

Adversarial Reasoning: Multiagent World Models for Closing the Simulation Gap

https://www.latent.space/p/adversarial-reasoning
1•swyx•9m ago•0 comments

Show HN: Poddley.com – Follow people, not podcasts

https://poddley.com/guests/ana-kasparian/episodes
1•onesandofgrain•17m ago•0 comments

Layoffs Surge 118% in January – The Highest Since 2009

https://www.cnbc.com/2026/02/05/layoff-and-hiring-announcements-hit-their-worst-january-levels-si...
7•karakoram•17m ago•0 comments

Papyrus 114: Homer's Iliad

https://p114.homemade.systems/
1•mwenge•17m ago•1 comments

DicePit – Real-time multiplayer Knucklebones in the browser

https://dicepit.pages.dev/
1•r1z4•17m ago•1 comments

Turn-Based Structural Triggers: Prompt-Free Backdoors in Multi-Turn LLMs

https://arxiv.org/abs/2601.14340
2•PaulHoule•19m ago•0 comments

Show HN: AI Agent Tool That Keeps You in the Loop

https://github.com/dshearer/misatay
2•dshearer•20m ago•0 comments

Why Every R Package Wrapping External Tools Needs a Sitrep() Function

https://drmowinckels.io/blog/2026/sitrep-functions/
1•todsacerdoti•20m ago•0 comments

Achieving Ultra-Fast AI Chat Widgets

https://www.cjroth.com/blog/2026-02-06-chat-widgets
1•thoughtfulchris•22m ago•0 comments

Show HN: Runtime Fence – Kill switch for AI agents

https://github.com/RunTimeAdmin/ai-agent-killswitch
1•ccie14019•25m ago•1 comments

Researchers surprised by the brain benefits of cannabis usage in adults over 40

https://nypost.com/2026/02/07/health/cannabis-may-benefit-aging-brains-study-finds/
1•SirLJ•26m ago•0 comments

Peter Thiel warns the Antichrist, apocalypse linked to the 'end of modernity'

https://fortune.com/2026/02/04/peter-thiel-antichrist-greta-thunberg-end-of-modernity-billionaires/
3•randycupertino•27m ago•2 comments

USS Preble Used Helios Laser to Zap Four Drones in Expanding Testing

https://www.twz.com/sea/uss-preble-used-helios-laser-to-zap-four-drones-in-expanding-testing
3•breve•32m ago•0 comments

Show HN: Animated beach scene, made with CSS

https://ahmed-machine.github.io/beach-scene/
1•ahmedoo•33m ago•0 comments

An update on unredacting select Epstein files – DBC12.pdf liberated

https://neosmart.net/blog/efta00400459-has-been-cracked-dbc12-pdf-liberated/
3•ks2048•33m ago•0 comments

Was going to share my work

1•hiddenarchitect•37m ago•0 comments

Pitchfork: A devilishly good process manager for developers

https://pitchfork.jdx.dev/
1•ahamez•37m ago•0 comments

You Are Here

https://brooker.co.za/blog/2026/02/07/you-are-here.html
3•mltvc•41m ago•1 comments

Why social apps need to become proactive, not reactive

https://www.heyflare.app/blog/from-reactive-to-proactive-how-ai-agents-will-reshape-social-apps
1•JoanMDuarte•42m ago•1 comments

How patient are AI scrapers, anyway? – Random Thoughts

https://lars.ingebrigtsen.no/2026/02/07/how-patient-are-ai-scrapers-anyway/
1•samtrack2019•42m ago•0 comments

Vouch: A contributor trust management system

https://github.com/mitchellh/vouch
3•SchwKatze•42m ago•0 comments

I built a terminal monitoring app and custom firmware for a clock with Claude

https://duggan.ie/posts/i-built-a-terminal-monitoring-app-and-custom-firmware-for-a-desktop-clock...
1•duggan•43m ago•0 comments
Open in hackernews

I've created a LeetCode-like platform for system design

https://www.systemstudio.app/
1•olucasandrad•3mo ago

Comments

olucasandrad•3mo ago
For the past few weeks, I've been working on one of the coolest things I've ever pushed to production: a LeetCode-style platform for system design.

I've been writing about system design for a while now, and I genuinely love the topic (I talk about it weekly on my blog https://olucasandrade.com). I always wanted a tool to practice it without having to hunt down a billion references across the internet.

Every tool I found was either paywalled for the basics or completely abandoned. So, I built my own, and I have no intention of letting it go. I believe this project has the potential to build a really great community. That's why I decided to "open-source" the entire platform. It's 100% open on GitHub, and I'm already creating issues for the next planned evolutions.

How this can help you:

The idea is simple: just like LeetCode, you can submit your solution (with a diagram + textual explanation), and you can view and interact with solutions from others. No favoritism here—I truly believe there's no better way to prepare for an interview or just sharpen your skills.

I don't plan to fully "productize" this until I hit my first major goal, so feel free to play around as much as you want, and please let me know if you find any bugs.

How you can help me:

First and foremost, dropping a star on the repository (https://github.com/olucasandrade/systemstudio) is a huge boost. That alone is massive support.

But if you want to help on a deeper level, feel free to open issues or even pull requests to add new features or work on existing ones. Honestly, the potential of this platform is not something I have enough bandwidth to explore alone. Finally, spreading the word is also a big help. I want this to reach as many people as possible who need it.

Cheers!

The link to the app is: https://systemstudio.app If it gets some traction, I'll share the next steps for the roadmap.

#lesgo