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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•9mo 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!

Show HN: PicoClaw – lightweight OpenClaw-style AI bot in one Go binary

https://github.com/mosaxiv/picoclaw
1•mosaxiv•55s ago•0 comments

Flood Fill vs. The Magic Circle

https://www.robinsloan.com/winter-garden/magic-circle/
1•gyomu•5m ago•0 comments

Show HN: A CLI tool to automate Git workflows using AI agents

https://github.com/leochiu-a/git-pr-ai
1•leochiu-a•9m ago•0 comments

Use AI to find movies and TV shows on your streaming services

https://pickalready.com
1•hudgeon•10m ago•0 comments

Spec driven development doesn't work if you're too confused to write the spec

https://publish.obsidian.md/deontologician/Posts/Spec-driven+development+doesn%27t+work+if+you%27...
1•habitue•12m ago•0 comments

GenAI Go SDK for AI

https://50984e11.maruel-ca.pages.dev/post/genai-v0.1.0/
1•cpeterso•14m ago•0 comments

Show HN: I built an AI-powered late-night call-in radio show from my RV

https://lukeattheroost.com
1•lukemacneil•16m ago•0 comments

HeartMuLa: Open-source music foundation model achieving commercial-grade quality

https://heart-mula.com
1•hanruezz•17m ago•1 comments

An emotional app to figure out your next step

https://www.heyecho.app/
1•samxkoh•17m ago•0 comments

Show HN: I built a macOS tool for network engineers – it's called NetViews

https://www.bedpage.com/
2•n1sni•18m ago•0 comments

We chose a pipeline over speech-to-speech for evaluative voice AI

https://productfit.substack.com/p/why-speech-to-speech-apis-fail-when
1•niraj_kothawade•18m ago•0 comments

Show HN: BlazeMQ – 52KB Kafka-compatible broker in C++20, zero dependencies

https://github.com/awneesh123/Blaze-mq
1•awneeshtiwari•19m ago•0 comments

LLMs Refuse High-Cost Attacks but Stay Vulnerable to Cheap, Real-World Harm

https://expectedharm.github.io/
2•blackcat201•19m ago•0 comments

AI Doesn't Reduce Work–It Intensifies It

https://simonwillison.net/2026/Feb/9/ai-intensifies-work/
1•walterbell•20m ago•0 comments

Show HN: Decision Guardian – Surface past architectural decisions on GitHub PRs

https://decision-guardian.decispher.com/
1•iamalizaidi•23m ago•0 comments

Show HN: Open-source civic toolkit – 48 policies, 12 interactive tools, forkable

1•david_mchale•30m ago•0 comments

Can You Fly That Thing?

https://tomtunguz.com/can-you-fly-that-thing/
1•walterbell•31m ago•0 comments

Making a working intercom system from some old phone [video]

https://www.youtube.com/watch?v=mkJmT9kiu30
2•Refreeze5224•32m ago•0 comments

Trump says new US-Canada bridge won't open without Canadian concessions

https://www.freep.com/story/news/politics/2026/02/09/trump-says-gordie-howe-bridge-wont-open-with...
5•SilverElfin•32m ago•1 comments

Show HN: Multi-attribute decision frameworks for tech purchases

1•boundedreason•37m ago•0 comments

KiraStudio 1.0.0 – a lightweight, cross-platform music studio

https://kirastudio.org
4•ksymph•45m ago•0 comments

Can my SPARC server host a website?

https://rup12.net/posts/can-my-sparc-server-host-my-website/
4•pabs3•45m ago•0 comments

Report on the subject of Manufacturers (1791) [pdf]

https://constitution.org/2-Authors/ah/rpt_manufactures.pdf
4•pilingual•46m ago•0 comments

Explaining the PeV neutrino fluxes with quasiextremal primordial black holes

https://journals.aps.org/prl/accepted/10.1103/r793-p7ct
1•dataflow•46m ago•0 comments

Internet Background Noise

https://en.wikipedia.org/wiki/Internet_background_noise
2•tripdout•46m ago•0 comments

Show HN: Secure managed hosting for OpenClaw (free and BYOK)

https://openclaw-setup.me/
1•Gregoryy•50m ago•0 comments

Ask HN: How do you interpret P99 latency without being misled?

1•danelrfoster•53m ago•0 comments

Trapped Between Pitch, Disclaimer, and Confession

https://gilpignol.substack.com/p/trapped-between-pitch-disclaimer
1•light_triad•53m ago•0 comments

The Vocabulary Priming Confound in LLM Evaluation [pdf]

https://github.com/Palmerschallon/Dharma_Code/blob/main/paper/vocab_priming_confound.pdf
1•palmerschallon•55m ago•0 comments

The committee problem: why B2B demos die after the form

https://blog.skipup.ai/buying-committee-demo-scheduling-problem/
1•bushido•57m ago•0 comments