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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!

Show HN: Yila – A Codex for Scientific Research

https://yila.ai
1•blacktechnology•2m ago•0 comments

Lobste.rs Deactivates "Vibecoding" Tag

https://lobste.rs/s/h0eate/updates_site_guidelines_ai_llm_tags
1•droidjj•4m ago•0 comments

Show HN: Open Artifacts – host AI artifacts on your own Cloudflare account

https://open-artifacts.com/
1•leourbina•6m ago•0 comments

Measuring Intelligence Beyond Human Scale

https://www.lesswrong.com/posts/avtquSx2PkWsxXW6T/how-to-measure-intelligence-beyond-human-scale
1•nicholascarolan•10m ago•0 comments

Man arrested after discussing plans for childcare mass shooting with [Claude]

https://www.smh.com.au/national/nsw/sydney-man-allegedly-discussed-plans-for-childcare-mass-shoot...
2•milderworkacc•13m ago•1 comments

Xyzzy

https://xyzzy.com
1•sans_souse•23m ago•0 comments

Chip Hall of Fame: The Signetics NE555

https://spectrum.ieee.org/chip-hall-of-fame-signetics-ne555
1•mindcrime•23m ago•0 comments

AI Is Not a Race

https://www.nitinpai.in/2026/10/19/ai-is-not-a-race
2•nitin-pai•25m ago•1 comments

A small model with a review loop matches a larger one at 58% of the cost

https://theopenengine.com/blog/review-loop/
1•eivindmeyer•26m ago•0 comments

I made tiny robot eyes

https://www.youtube.com/watch?v=GbcN0bPs-Ig
1•oliculipolicula•27m ago•0 comments

Ask HN: New Outlook` sends everything through Microsoft Servers

2•NicoJuicy•28m ago•0 comments

Zepto Scales Customer Support on Databricks and MLflow

https://www.databricks.com/blog/evaluation-first-ai-agents-how-zepto-scales-customer-support-data...
1•akbarnama•35m ago•0 comments

Who lives without a car in the Bay Area

https://maxmautner.com/2026/10/16/sf-car-free.html
1•mslate•39m ago•2 comments

Calling all GPUs: help us benchmark SonicBoom v0.0.3

https://github.com/hardenedlinux/SonicBoom/issues/2
1•nalaginrut•39m ago•0 comments

Remade.Wiki

https://remade.wiki/
1•beatthatflight•41m ago•0 comments

Dead German Guys

https://blog.coredump.cx/p/dead-german-guys
1•surprisetalk•42m ago•0 comments

China Plans to Tighten Export Controls on AI Technologies

https://wallhop.io/https://www.theepochtimes.com//china/china-plans-to-tighten-export-controls-on...
3•jamiesonbecker•45m ago•2 comments

If you want to make a bajillion dollars, solve agent identity

https://12gramsofcarbon.com/p/agentics-agent-identity-is-a-really
2•theahura•48m ago•0 comments

Gaming's all‑digital future doesn't include Sonic the Hedgehog 3 and Pikmin 2

https://sethmlarson.dev/gaming-all-digital-future-and-creative-constraint
1•aray07•51m ago•0 comments

"The AI bubble is about to burst and a big market correction's coming" – NY Post

https://nypost.com/2026/10/17/business/the-ai-bubble-is-about-to-burst-much-like-the-infamous-dot...
4•MilnerRoute•52m ago•2 comments

Mathematics, Science and Artificial intelligence by Prof. Weinan E [video]

https://www.youtube.com/watch?v=70oUM-TdRds
1•belleville•53m ago•0 comments

Why Humanity Might Have to Declare War on AI (By: William Spaniel) [video]

https://www.youtube.com/watch?v=OAU3lAadXLM
1•4diii•55m ago•0 comments

Designing LLM failover as a route change, not a retry loop

https://modelflare-blog.static.hf.space/model-groups-and-failover.html
1•Matthewmodelfla•55m ago•0 comments

Can AI Automate Epoch?

https://epoch.ai/publications/can-ai-automate-epoch
3•gmays•1h ago•0 comments

The most powerful and free local AI note taking app I've ever used

https://github.com/seacen/meetcap
2•seacen•1h ago•2 comments

Show HN: Fan Transition – Generate outfit transition videos from a single photo

https://fantransition.com/
1•humphrey_liu•1h ago•0 comments

Show HN: Stream Reducer – Audio AI Summarization at Scale

https://reducer.xgoose.org/
3•lobstey•1h ago•0 comments

Show HN: PredixLab – my personal system to discover investment opportunities

https://github.com/predixlab/predixlab-infra
1•unliftedq•1h ago•0 comments

Show HN: See diffs of Wikipedia over time

https://memoryhole.app/wiki-timeline
1•flippant•1h ago•0 comments

Show HN: Simulate an engineering blog, or an idea or an incident

https://github.com/smarchone/sim-xp
1•smarch27•1h ago•0 comments