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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•11mo 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!

The new rules for AI-assisted code in the Linux kernel: What devs need to know

https://www.zdnet.com/article/linus-torvalds-and-maintainers-finalize-ai-policy-for-linux-kernel-...
1•CrankyBear•1m ago•0 comments

Cloudflare Mesh – secure private networking: users, nodes, agents, Workers

https://blog.cloudflare.com/mesh/
1•rs_rs_rs_rs_rs•1m ago•0 comments

The Focus Spectrum

https://alexoppenheimer.substack.com/p/the-focus-spectrum
1•crescit_eundo•2m ago•0 comments

Some Texas neighborhoods are seeing feral hogs for the first time

https://www.chron.com/life/wildlife/article/texas-feral-hogs-neighborhoods-22203883.php
1•mooreds•2m ago•0 comments

Rare concert records going on Internet Archive

https://techcrunch.com/2026/04/13/thousands-of-rare-concert-recordings-are-landing-on-the-interne...
1•jrm-veris•2m ago•0 comments

Systems Engineering: Building Agentic Software That Works

https://twitter.com/ashpreetbedi/status/2041568919085854847
1•gmays•3m ago•0 comments

Fidelis Security: Detect and Respond to Threats 9x Faster

https://fidelissecurity.com/
1•fidelissecurity•3m ago•0 comments

Silicon Valley Is Spending Millions to Stop One of Its Own

https://www.wired.com/story/the-big-interview-podcast-new-york-state-representative-alex-bores/
1•_tk_•5m ago•0 comments

A lockfile could have saved you from the LiteLLM attack

https://www.jacobhgreen.com/writings/lockfiles/
1•p44v9n•7m ago•0 comments

Compressed 586K tokens to 5K with 100% accuracy retention – here's the math

https://github.com/juyterman1000/entroly
1•abbyedd•8m ago•0 comments

Economics of Curing Cancer (RoR of 1024%)

https://www.nber.org/papers/w35052
2•Balgair•8m ago•0 comments

Show HN: Claude Control – macOS dashboard for managing Claude Code sessions

https://github.com/sverrirsig/claude-control
1•svessi•9m ago•1 comments

The Economics of Proof of Concept

https://deploy95.substack.com/p/the-economics-of-poc
1•dddddaviddddd•11m ago•0 comments

I Feel So Sorry for My A.I. Sunglasses

https://www.nytimes.com/2026/04/14/magazine/ai-sunglasses-meta-zuckerberg.html
1•tysone•12m ago•0 comments

Single-Dose Creatine Reduces Sleep Deprivation-Induced Deterioration

https://www.mdpi.com/2072-6643/18/8/1192
2•pvsukale3•13m ago•0 comments

Raspberry Pi as an isolated AI coding server

https://blog.jgc.org/2026/04/raspberry-pi-as-isolated-ai-coding.html
1•Brajeshwar•13m ago•0 comments

Apple Maps Ads Move Closer to Launch with iOS 26.5 Beta 2

https://www.macrumors.com/2026/04/13/ios-26-2-beta-2-apple-maps-ads/
2•impish9208•14m ago•0 comments

Two Months After I Gave an AI $100 and No Instructions

https://www.sebastian-jais.de/blog/two-months-alma-experiment
16•gleipnircode•14m ago•8 comments

Show HN: Nobulex – Prove what your AI agent did, cryptographically (live demo)

https://nobulex.com/playground
1•arian_•15m ago•0 comments

Tonone-AI/elephant: Persistent memory for Claude Code. Never forget a session

https://github.com/tonone-ai/elephant
1•thisisfatih•17m ago•0 comments

Show HN: Who'Studios – A Social Design Platform

https://www.whostudios.com/
2•WhosTiki•18m ago•0 comments

Lithium Yay

https://slimemoldtimemold.com/2025/10/02/lithium-yay/
1•surprisetalk•19m ago•0 comments

Notes on Beautiful Nonfiction

https://www.jenn.site/notes-on-beautiful-nonfiction/
2•surprisetalk•19m ago•0 comments

Age of Invention: Just Kiln Time

https://www.ageofinvention.xyz/p/age-of-invention-just-kiln-time
1•surprisetalk•19m ago•0 comments

Software Engineering Is Becoming Engineering

https://calebfenton.substack.com/p/software-engineering-is-becoming
4•calebfenton•19m ago•1 comments

No-Stack Web Development

https://dbushell.com/2026/04/10/no-stack-web-development/
1•rpgbr•19m ago•1 comments

Show HN: Cyber Pulse. AI pipeline for triage and alerting on cyber news/intel

https://play.google.com/store/apps/details?id=com.cyberpulse.cyber_pulse&hl=en_US
1•kozi93•19m ago•0 comments

Amazon signs $11.57B deal for satellite firm Globalstar

https://www.reuters.com/business/media-telecom/amazon-signs-1157-billion-deal-satellite-firm-glob...
1•elsewhen•20m ago•0 comments

Claude Code hitting ~50% usage after 1–2 prompts (Pro user)

https://github.com/anthropics/claude-code/issues/47587
3•kundi•20m ago•0 comments

Ratsissimo – RatGPT powered operatic mouse trap

https://shitposting.ai/ratsissimo/
1•commandertso•21m ago•0 comments