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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•10mo 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!

Injecting Tracing the Hot Way

https://underjord.io/injecting-tracing-the-hot-way.html
1•lawik•1m ago•0 comments

The coming PLG to SLG apocalypse

https://www.withsahel.com/blog/plg-to-enterprise-timeline-compression
1•iajiboye•2m ago•1 comments

Ask HN: Can I somehow exit HN desktop view on mobile?

1•hxugufjfjf•4m ago•0 comments

Show HN:Building Software Systems That Builds,Corrects,Reviews & Extends Itself

https://pub.towardsai.net/the-software-that-built-itself-well-defined-intents-are-all-you-need-06...
1•alexcpn•6m ago•1 comments

Show HN: Orloj – agent infrastructure as code (YAML and GitOps)

https://github.com/OrlojHQ/orloj
1•An0n_Jon•6m ago•0 comments

AI Arbitrator

https://www.adr.org/ai-arbitrator/
1•dqv•10m ago•0 comments

Show HN: Scope – a beautiful open-source web client for Stremio

https://github.com/scope-player/scope
1•judekim•13m ago•0 comments

Show HN: Agent Ruler new update v0.1.9

1•steadeepanda•16m ago•1 comments

Show HN: I built a lawyer game with AI

https://legalarena.app
1•divyanthj•17m ago•0 comments

Proactively Parasocial

https://nicklandolfi.com/posts/proactively-parasocial.html
1•jxmorris12•20m ago•0 comments

One man company is possible

https://mdalpha.ai/
1•sam890306•21m ago•1 comments

Show HN: Prompt Guard–MitM proxy that blocks secrets before they reach AI APIs

https://github.com/chaudharydeepak/prompt-guard
2•chaudharydeepak•24m ago•1 comments

I didn't understand TurboQuant, so I made this explainer

https://cyrusradfar.com/thoughts/turboquant-explainer
3•cyrusradfar•27m ago•0 comments

Terafab

https://en.wikipedia.org/wiki/Terafab
1•gnarlouse•31m ago•1 comments

My 1k Favorite Books

https://kylebenzle.com/bookreviews.php
1•hilliardfarmer•32m ago•0 comments

Show HN: Agent Kernel – Three Markdown files that make any AI agent stateful

https://agent-kernel.dev/?v=1.0.0
1•obilgic•39m ago•0 comments

HN: Surviving the litellm supply chain attack with a pure ctypes OS Vault

https://github.com/MACCRE-2026/MACCRE-Sovereign-Auth
2•MACCRE•39m ago•0 comments

Creating Readerly

https://nicoverbruggen.be/blog/creating-readerly
3•ganksalot•44m ago•0 comments

Squirrel seen 'vaping' in London park

https://www.telegraph.co.uk/news/2026/03/23/squirrel-seen-vaping-in-london-park/
4•walterbell•45m ago•0 comments

Research Shows Verbatim Recall of Copyrighted Books in LLMs

https://cauchy221.github.io/Alignment-Whack-a-Mole/
2•nsagent•45m ago•0 comments

Show HN: Send Love, Send Letters (at cost)

https://mappymail.com
1•pruetj•46m ago•0 comments

OpenAI backs AI "bot army" startup Isara ($94M, $650M valuation)

https://www.wsj.com/tech/ai/openai-backs-new-ai-startup-seeking-bot-army-breakthroughs-a0b1fedc
1•MoritzWall•50m ago•2 comments

Made this tool so your docs never get stale just in 2 simple steps

1•AYSgood•54m ago•0 comments

Getting Global Age Assurance Right: What We Got Wrong and What's Changing

https://discord.com/blog/getting-global-age-assurance-right-what-we-got-wrong-and-whats-changing
2•kaladin-jasnah•56m ago•0 comments

10.3" Color E Ink Tablet Android 14OS (Bigme B1051C)

https://store.bigme.vip/products/bigme-b1051c-ulta-thin-color-e-ink-tablet-with-android-14os
1•BandOfBots•58m ago•0 comments

Ask HN: How did you figure out what you wanted to do with your life?

3•icwtyjj•58m ago•2 comments

Polygraphs Aren't Accurate. Are There Better Options?

https://undark.org/2026/03/25/lie-detection-polygraph-accuracy/
1•EA-3167•1h ago•0 comments

Zero Days: Electric Motorcycles Are a Security Nightmare

https://persephonekarnstein.github.io/post/zero-days/
3•todsacerdoti•1h ago•0 comments

TSA boss warns of airport shutdowns; no deal yet on day 40 of DHS funding fight

https://apnews.com/article/airport-wait-times-shutdown-dhs-congress-tsa-391cbd731bed2e8433ab7f1a9...
3•mikhael•1h ago•1 comments

Isrib

https://en.wikipedia.org/wiki/ISRIB
1•keepamovin•1h ago•0 comments