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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•1y 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!

RepoDocs – turn your repo's Markdown/*.md into a Figma-like board you can edit

https://github.com/alecerca/repoDocs
1•alecerca•2m ago•0 comments

Show HN:Tornedo- Everything a torrent client does, without leaving your terminal

https://www.npmjs.com/package/tornedo
1•debdev•2m ago•0 comments

Naming AI agents after Seinfeld characters helps bots join the team – report

https://www.theregister.com/ai-and-ml/2026/09/22/security-firm-finds-naming-ai-agents-after-seinf...
1•mikelgan•4m ago•0 comments

Open-weight models take 56% of token volume

https://vercel.com/blog/ai-gateway-production-index-september-2026
1•mgdo•8m ago•0 comments

Tokens Too Cheap to Meter

https://jyn.dev/tokens-too-cheap-to-meter/
2•benjaminclauss•11m ago•0 comments

Trump says US will henceforth call AI 'super intelligence'

https://www.reuters.com/legal/government/trump-says-us-will-henceforth-call-ai-super-intelligence...
3•OuterVale•13m ago•0 comments

Show HN: I generated 21k astrology pages with Swiss Ephemeris, open sourced

https://github.com/feifeizhao25-ship-it/astrology-pseo-generator
1•tianji-astrolog•13m ago•0 comments

Weak models write tool calls as prose. We started executing them

https://fiit.ai/engineering/tool-calls-as-prose
1•airbai•15m ago•0 comments

Formal methods can start small

https://www.yovico.ai/blog/formal-methods-can-start-small/
1•siberiankot•15m ago•0 comments

Z.ai uploading local code repos to overseas cloud without consent

https://www.reuters.com/legal/litigation/chinas-zai-disables-ai-coding-assistant-features-after-s...
1•txscdn•21m ago•1 comments

Strands harness: frontier performance with 28% lower token cost

https://strandsagents.com/blog/introducing-strands-harness/
2•fourfire•26m ago•0 comments

Can the US Build a DJI? A Teardown of Two DJI Drones

https://www.arenaphysica.com/publications/dji-teardown
1•tristanj•27m ago•0 comments

NASA-Funded Research Finds Complex Life Defying Record Heat

https://science.nasa.gov/science-research/planetary-science/nasa-funded-research-finds-complex-li...
1•Jimmc414•30m ago•1 comments

I'm sick of Claudisms, & what will happen next in AI-boosted software dev

https://www.polso.info/im-sick-of-claudisms-future-ai-software-development
1•rizsyed1•30m ago•1 comments

AQAB: Anti-fascist blocklist QAnon, conspiracy, fake news, far-right, hate sites

https://codeberg.org/NotaInutilis/AQAB
2•Baljhin•38m ago•0 comments

Trump administration attacks Australia optout algorithm law in rare intervention

https://www.abc.net.au/news/2026-09-22/trump-administration-slams-digital-duty-of-care-bill/10718...
1•jyhrow•39m ago•0 comments

Fun: First-Class Functions, Currying, and a Surprise

https://blog.tinyinterpreters.dev/posts/fun-first-class-functions/
1•TheWiggles•51m ago•0 comments

Meta admits Muse's likeness to OpenClaw isn't a coincidence

https://techcrunch.com/2026/09/22/meta-admits-muses-likeness-to-openclaw-isnt-a-coincidence/
1•sbulaev•52m ago•1 comments

Cities across US oppose Trump FCC plan to preempt local broadband rules

https://arstechnica.com/tech-policy/2026/09/cities-across-us-oppose-trump-fcc-plan-to-preempt-loc...
5•pseudolus•53m ago•0 comments

Web-based IBM 1620 emulator and IPL-V from 1963

https://github.com/pkimpel/retro-1620
1•abrax3141•53m ago•1 comments

Ask HN: What do people do with Android phones once security updates end?

1•trombuance•53m ago•2 comments

Show HN: Birthed, a daily board of what mattered that locks at midnight

https://github.com/jasonepage/Birthed
1•jpage2•57m ago•1 comments

Reflections on object oriented design patterns (2026)

1•kooi•1h ago•1 comments

The new CC, an AI agent built for families

https://blog.google/innovation-and-ai/models-and-research/google-labs/cc-expanding-to-groups/
12•grigy•1h ago•4 comments

What anaesthetics are revealing about consciousness

https://www.bbc.com/future/article/20260921-what-general-anaesthetic-reveals-about-our-brains
3•nhatcher•1h ago•1 comments

NIST Crypto Reading Club

https://csrc.nist.gov/Projects/crypto-reading-club
2•segfaultbuserr•1h ago•0 comments

A 1996 dial-up chat room simulator (lolchat.rip)

https://lolchat.rip/
2•henrychannel•1h ago•1 comments

The ruble markup on AI tokens

https://infertrail.com/blog/ruble-markup-ai-tokens/
1•whitef0x•1h ago•0 comments

Temporal Straightening for Latent Planning

https://arxiv.org/abs/2603.12231
2•gmays•1h ago•0 comments

Sovereign Substrate Appliance: Layer-1 Edge Node on ARM64

https://richardkugel.substack.com/p/sovereign-substrate-appliance-re
1•drawono•1h ago•0 comments