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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!

Ask HN: A CLI to control what AI code can (and can't) change in your repo

1•sujitjaunjal•26s ago•0 comments

Principles of Mechanical Sympathy

https://martinfowler.com/articles/mechanical-sympathy-principles.html
1•emschwartz•5m ago•0 comments

Taco: Linktaco from Your Terminal

https://linktaco.com/blog/taco-cli-tool-linktaco.html
1•peterjsanchez•6m ago•0 comments

Show HN: Tired of logic in useEffect, I built a class-based React state manager

https://thales.me/posts/why-i-built-snapstate/
1•thalesfp•7m ago•0 comments

Hsihp Hsims

https://fromouterstace.com
1•stacydbradford•7m ago•0 comments

Prisoner's Dilemma – An Extension (from game theory)

https://pd.luthira.com/
1•llamatheollama•10m ago•0 comments

Resurrecting a 1992 MUD with Agentic AI

https://meditations.metavert.io/p/resurrecting-a-1992-mud-with-agentic
2•salt4034•11m ago•0 comments

Once 'Ultra MAGA', Trump Supporters Fume About Iran on Truth Social

https://www.nytimes.com/2026/04/08/us/politics/trump-truth-social-iran.html
2•doener•11m ago•0 comments

Volatco – Powerful Multicompute

https://volatco.github.io/
1•nbaksalyar•16m ago•0 comments

Show HN: Linggen – Open-source AI agent with P2P remote access from your phone

https://linggen.dev/
1•linggen•17m ago•0 comments

How to Connect to Builders in Web3

https://woof.software/
1•Pasha-CEO•19m ago•1 comments

Google engineer rejected by colleges uses AI to sue for racial discrimination

https://abc7news.com/post/google-engineer-rejected-colleges-uses-ai-sue-ucs-other-universities-ra...
1•ubasu•19m ago•0 comments

AI Did It in 12 Minutes. It Took Me 10 Hours to Fix It

https://idiallo.com/blog/it-took-me-10-hours-to-fix-ai-code
2•firefoxd•24m ago•1 comments

Show HN: Is Hormuz Open Yet?

https://www.ishormuzopenyet.com/
72•anonfunction•28m ago•22 comments

Finetuning Activates Verbatim Recall of Copyrighted Books in LLMs

https://arxiv.org/abs/2603.20957
1•guitarlimeo•28m ago•0 comments

Boots on the Ground, Flip Flops in the Air [pdf]

https://drive.google.com/file/d/1DrnHCWOQ7PRHNBqbxdqT_yQMRVFC8YbD/view?usp=drive_link
1•sans_souse•30m ago•0 comments

Show HN: Phantom UI – Skeleton that measures your real DOM (Web Component, 8kb)

https://github.com/Aejkatappaja/phantom-ui
5•Aejkatappaja•37m ago•6 comments

Agent Brain – 7-layer cognitive memory for AI agents (open source)

https://github.com/kaderosio/agent-brain
2•Thesh2209•39m ago•1 comments

OpenAI: The Next Phase of Enterprise AI

https://openai.com/index/next-phase-of-enterprise-ai/
3•louiereederson•43m ago•2 comments

Show HN: SessionFlow macOS app that auto-schedules sessions around your calendar

https://github.com/kibermaks/SessionFlow
1•kibermaks•43m ago•0 comments

Grading laptop and cell phone companies on the fixability of their products

https://pirg.org/edfund/resources/failing-the-fix-2026/
2•breve•45m ago•0 comments

So My Friend Made Me a Bioreactor

https://chillphysicsenjoyer.substack.com/p/so-my-friend-made-me-a-bioreactor
1•crescit_eundo•46m ago•0 comments

Anthropic Set to Preview Powerful 'Mythos' Model to Ward Off AI Cyberthreats

https://www.wsj.com/tech/ai/anthropic-set-to-preview-powerful-mythos-model-to-ward-off-ai-cyberth...
1•sonabinu•49m ago•0 comments

Show HN: I built a local data lake for AI powered data engineering and analytics

https://stream-sock-3f5.notion.site/Nile-Local-an-AI-Data-IDE-that-runs-on-your-local-machine-33b...
5•vpfaiz•49m ago•0 comments

Fantasshtic – Free Cursor for SSH

https://fantasshtic.vercel.app
2•aureus_cx•50m ago•0 comments

Ask HN: What tools are you using to secure your Claude memory files?

1•taariqlewis•50m ago•0 comments

Something weird is happening on Tinder [video]

https://www.youtube.com/watch?v=rjxAYdUe8uU
1•DavidHaerer•53m ago•1 comments

The $400K Degree Is Broken. Here Is How to Fix It

https://raisinghumanity.substack.com/p/the-400k-degree-is-broken-here-is
1•United857•53m ago•3 comments

You Need a Windows Remote Desktop, Not an OpenClaw

https://nedshed.dev/p/you-need-a-windows-remote-desktop
2•etwigg•54m ago•1 comments

Show HN: CongaLine – Self-hosted isolated AI agent fleet (OpenClaw, Hermes)

https://github.com/cruxdigital-llc/congaline
1•zhendershot•54m ago•0 comments