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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!

Why hasn't AI improved design quality the way it improved dev speed?

https://starzup.vercel.app/
1•ashleyvarghesee•5m ago•0 comments

Eyes and ears for Karpathy's virtual brain

https://github.com/Nalin-Atmakur/hivemind
1•NalinAtmakur•15m ago•0 comments

OpenAI's Vision for the AI Economy

https://techcrunch.com/2026/04/06/openais-vision-for-the-ai-economy-public-wealth-funds-robot-tax...
2•gmays•20m ago•0 comments

Show HN: devnexus – shared AI brain across repos, sessions, and engineers

https://github.com/JoshBong/devnexus
1•Joshhuang314•22m ago•0 comments

SmolBSD – build your own minimal BSD system

https://smolbsd.org/#about
1•rodrigo975•25m ago•0 comments

Deep Dive into Claude's Memory Architecture

https://twitter.com/spandan_madan/status/2045336831999475789
1•spandan_madan•26m ago•0 comments

The Abstraction Fallacy: Why AI Can Simulate but Not Instantiate Consciousness

https://deepmind.google/research/publications/231971/
1•joshus•38m ago•0 comments

Open Soucrce AI-powered screen recording

https://github.com/getcoherence/studio
2•keithfawcett•38m ago•0 comments

I built a multi-turn clinical safety eval framework for LLMs

https://medium.com/@deeps.subramaniam/part-2-what-the-numbers-say-and-why-that-matters-more-than-...
2•deepikaa_s•38m ago•0 comments

Ohio's nursing homes are dumping patients at homeless shelters

https://apnews.com/article/ohio-nursing-home-patients-homeless-shelters-9c000eeddc9c9411f44fd605f...
2•petethomas•39m ago•0 comments

Ternary Bonsai: Top Intelligence at 1.58 Bits

https://prismml.com/news/ternary-bonsai
1•nnx•40m ago•0 comments

Claude Code Model Chooser

https://bendansby.com/model-chooser.html
1•webwielder2•40m ago•0 comments

Unweight: We compressed an LLM 22% without sacrificing quality

https://blog.cloudflare.com/unweight-tensor-compression/
4•subset•46m ago•1 comments

Quantum-resistant cryptocurrency node built in Rust with FALCON-512 and RandomX

https://github.com/Kstyle12/qubit-topcoin
1•kstyle12•48m ago•3 comments

Cursor in talks to raise $2B+ at $50B valuation as enterprise growth surges

https://techcrunch.com/2026/04/17/sources-cursor-in-talks-to-raise-2b-at-50b-valuation-as-enterpr...
3•evo_9•54m ago•0 comments

I watch my parents meet a predator that hard work cannot beat

https://substack.com/home/post/p-194559908
2•kyanfeat•55m ago•1 comments

Operation Gladio

https://en.wikipedia.org/wiki/Operation_Gladio
1•Jimmc414•59m ago•0 comments

Friday Squid Blogging: New Giant Squid Video

https://www.schneier.com/blog/archives/2026/04/friday-squid-blogging-new-giant-squid-video-2.html
1•omer_k•1h ago•0 comments

Bodega Cats of New York

https://bodegacatsofnewyork.com
2•zdw•1h ago•0 comments

Objection.ai - The AI Tribunal of Truth

https://objection.ai/
1•kawera•1h ago•0 comments

White House and Anthropic hold meetings over Mythos model

https://www.bbc.com/news/articles/cyv10e1d13po
1•_josh_meyer_•1h ago•1 comments

The Business Plot of 1933

https://en.wikipedia.org/wiki/Business_Plot
4•Jimmc414•1h ago•0 comments

Channel decorrelation: 52.8% reduction across Kodak suite, no ML or codec mods [pdf]

https://github.com/PearsonZero/asymmetric-channel-decorrelation/blob/main/baetzel_2026_kodak_benc...
1•PearsonZero•1h ago•0 comments

The nine-to-five PhD: mere myth or an achievable goal?

https://www.nature.com/articles/d41586-026-00509-9
3•jyunwai•1h ago•0 comments

Effective Conversational AI Book: Detailed Review

https://noroinsight.com/effective-conversational-ai-book-review/
1•teleforce•1h ago•0 comments

Show HN: Small, an x402 powered writing site

https://getsmall.xyz/
2•trezm•1h ago•0 comments

Claude Experiment "PersMEM" Rep5: The Distributional Bias and the Third Instance

1•asixicle•1h ago•0 comments

Ketamine for negative and depressive symptoms in schizophrenia

https://www.frontiersin.org/journals/psychiatry/articles/10.3389/fpsyt.2026.1766485/full
1•PaulHoule•1h ago•0 comments

Human Accelerated Regions

https://en.wikipedia.org/wiki/Human_accelerated_regions
1•rolph•1h ago•0 comments

The rate trap: how one architecture decision kills flexibility

https://github.com/getlago/lago/wiki/The-rate-trap:-how-one-architecture-decision-kills-flexibility
1•danoandco•1h ago•0 comments