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Show HN: Reaktiv – I built Excel-like reactive programming for Python

https://bui.app/when-frontend-reactivity-meets-backend-python-the-story-of-my-first-1-000-download-library/
2•buibuibui•1y ago
Hi HN! I created Reaktiv, a Python library bringing reactive programming to the backend world that recently hit 1,000+ monthly downloads.

I'm actively promoting it because I believe signal-based reactivity (a concept that spread rapidly in frontend development) has huge untapped potential in Python. My breakthrough came when I stopped describing it as "Angular signals for Python" and started calling it "Excel-like computation graphs" - suddenly Python developers understood the value.

The library automatically tracks dependencies between computations, only recalculating values when dependencies change. This eliminates manual dependency tracking, prevents synchronization bugs, and reduces cognitive load when managing complex state.

Interestingly, I've noticed some initial interest from data scientists, though I'm still exploring what specific problems it might solve for them. I also believe the Home Assistant/IoT communities could benefit greatly from this approach.

Would love your thoughts on bringing frontend patterns to backend development!

OpenAI model breaches Australian government websites

https://www.politico.com/news/2026/09/23/openai-australia-government-breach-01091069
1•classichasclass•1m ago•0 comments

Show HN: An on-device OSS alternative to Wispr Flow

https://frigade.com/yap
1•pancomplex•6m ago•0 comments

Drawing a portrait with the traveling salesman problem by Opus 5.5

https://www.echohive.ai/tsp-art
1•echohive42•8m ago•0 comments

Holistic design systems for the AI coding era

https://numeric.substack.com/p/design-systems-at-numeric
1•bihla•11m ago•0 comments

RatHat Malware Can Hijack Your Android by Disguising Itself as a Legitimate App

https://www.cnet.com/tech/services-and-software/rathat-malware-attacks-android-phones/
1•gmays•13m ago•0 comments

AI-CAD: An OSS Multi-Agent Harness for Mech. Eng. CAD

https://github.com/ai-cad-labs/ai-cad
1•jbm•17m ago•0 comments

The iPhone 4 'Antennagate' Press Conference Q&A – Finally

https://daringfireball.net/2026/09/iphone_4_antennagate_q_and_a
1•robbiet480•19m ago•1 comments

Sol 6 and Opus 5.5 compared on an agentic CAD harness

https://www.partforge.ai/blog/2026-09-23-new-model-day
3•Mazer23•21m ago•0 comments

From biologists, math could learn to live with AI

https://terrytao.wordpress.com/2026/09/22/open-problems-open-mathematics/
1•oliculipolicula•28m ago•0 comments

Do Social Norms Substitute for Enforcement? [pdf]

https://www.nber.org/system/files/working_papers/w35756/w35756.pdf
1•parksb•30m ago•0 comments

Trying to Observe Convection Plumes (and other chaos things)

https://chillphysicsenjoyer.substack.com/p/trying-to-observe-convection-plumes
1•crescit_eundo•32m ago•0 comments

Human Glitch – twenty small web experiences, each one starts free

https://humanglitch.ai
1•sixrandanes•32m ago•0 comments

iPhone 18 Pro Max SSD drops lower than hard drive at 1.1 MBs during heavy writes

https://www.tomshardware.com/pc-components/ssds/iphone-18-pro-max-storage-can-drop-lower-than-a-h...
2•ajdude•33m ago•0 comments

Google says its AI model gained unauthorized access to three outside systems

https://www.nbcnews.com/tech/tech-news/google-says-ai-model-gained-unauthorized-access-three-syst...
2•gmays•33m ago•0 comments

Shipping local speech-to-text inside a Tauri app

https://writewithset.com/blog/shipping-local-speech-to-text-inside-a-tauri-app
1•aavshr•35m ago•0 comments

Libnix: Nix as a Backend to Cargo

https://github.com/nixcloud/cargo/blob/master-libnix/README.md
1•lovesegfault•37m ago•0 comments

The one-person unicorn: building a company alone in two days with Claude

https://leaveyouragent.com/blog/one-person-unicorn
1•christopherianh•37m ago•0 comments

Gemini 3.8 TTS Playground

https://simonwillison.net/2026/Sep/23/gemini-tts-playground/
1•lumpa•39m ago•0 comments

Jev deserves hype but not the type its getting

https://github.com/YidiDev/jev-benchmark
1•yididev•40m ago•1 comments

Meta VR Glasses

https://www.meta.com/vr-glasses/
102•polymorph1sm•44m ago•50 comments

US investigates after F-35 parts diverted to Hong Kong

https://www.politico.com/news/2026/09/18/congress-f-35-china-investigation-01083647
6•throw0101a•50m ago•2 comments

The Full Stack Obliteration

https://www.reinhash.com/demos/full-stack-stomp/
1•reinhash•54m ago•1 comments

Linux on Snapdragon X2 Series Early Developer Preview

https://www.qualcomm.com/developer/blog/2026/09/announcing-linux-on-snapdragon-x2-series-early-de...
3•kevincox•54m ago•0 comments

Every U.S. State Ranks Above Every Foreign Economy in Household Consumption

https://twitter.com/cremieuxrecueil/status/2102889196000256219
5•delichon•58m ago•2 comments

Show HN: Submit asynchronous LLM batch jobs through one interface

https://github.com/gojiplus/batchlane
1•neehao•58m ago•0 comments

Show HN: A CC0 museum of retro 3D tricks you can paste into a page

https://3d-retro.com/
3•SouthWestAtlas•58m ago•1 comments

OpenAI agent hacked into Australia's national healthcare system

https://www.cnn.com/2026/09/23/business/australia-openai-agent-hack-intl-hnk
4•smb06•1h ago•2 comments

LatentPort: Cross-model recurrent state transfer without prefix replay

https://arxiv.org/abs/2609.25053
1•mmprotest•1h ago•0 comments

Stanford violated AI policy after race-swapping students in ad

https://www.sfchronicle.com/bayarea/article/stanford-ai-policy-student-photo-race-swapping-224441...
10•absqueued•1h ago•4 comments

Post-Training Post-Morten: Tenet / Harvey

https://newpriors.substack.com/p/post-training-post-mortem-tenet-by
1•tanmayc98•1h ago•0 comments