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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!

Satisfies Never Off by One

https://nicklawler.website/exhaustiveness-off-by-one/
1•seagreen•1m ago•0 comments

Integrity of a Shared Filesystem

https://uncultu.red/2026-02-19/
1•vvanpo•4m ago•0 comments

Viral Child Soldiers on TikTok

https://www.bellingcat.com/news/2026/02/20/viral-child-soldiers-on-tiktok-the-disney-stars-of-sud...
1•thomassmith65•4m ago•0 comments

Show HN: Ember MCP – local persistent memory for LLMs, kills stale memories

https://github.com/Arkya-AI/ember-mcp
1•TimoLabs•5m ago•0 comments

I built a live honeypot that catches AI agents. Here's what happened

https://github.com/chrisochrisochriso-cmyk/leaky_agent
1•paperknight•7m ago•0 comments

America is at risk of becoming an automotive backwater

https://www.theverge.com/transportation/882194/america-auto-backwater-ev-loss-detroit-trump-emiss...
2•FigurativeVoid•7m ago•0 comments

Taalas HC1: The Chip That Can't Change Its Mind

https://twitter.com/DavidBennett__/status/2024615668239520121
1•bilsbie•8m ago•0 comments

Show HN: What Did I Watch? – Describe any movie/show and AI finds it

https://whatdidiwatch.onrender.com/
1•sellne•9m ago•1 comments

Packets at Line Rate: How to Actually Use AF_XDP

https://nahla.dev/blog/how_to_xdp/
1•nahla_nee•10m ago•0 comments

If LLMs Only Predict the Next Token, Why Do They Work?

https://sicheng.dev/writing/why-can-LLM-work
2•sichengo•11m ago•0 comments

Show HN: Fusion 360 G-Code Optimizer

https://www.gcode-optimizer.com/index.php/
1•bmus•11m ago•0 comments

Layers of AI Memory

https://knowledgeplane.io/blog/three-types-of-ai-memory/
2•altras•12m ago•0 comments

Trump plans 10% global tariff, says refund fights may take years

https://www.reuters.com/world/us/scotus-live-us-supreme-court-rules-legality-trumps-tariffs-2026-...
1•pseudolus•13m ago•0 comments

LibreOffice attacks OnlyOffice as "fake open source" over Microsoft ties

https://www.neowin.net/news/libreoffice-blasts-fake-open-source-onlyoffice-for-working-with-micro...
1•bundie•15m ago•0 comments

Unraveling multilayer CO2 plumes: Case study from the Sleipner storage site

https://pubs.geoscienceworld.org/seg/interpretation/article/14/2/T1/723830/Unraveling-multilayer-...
1•PaulHoule•15m ago•0 comments

'Starkiller' Phishing Service Proxies Real Login Pages, MFA

https://krebsonsecurity.com/2026/02/starkiller-phishing-service-proxies-real-login-pages-mfa/
1•todsacerdoti•16m ago•0 comments

Amazon blames human employees for an AI coding agent's mistake

https://www.theverge.com/ai-artificial-intelligence/882005/amazon-blames-human-employees-for-an-a...
2•gurjeet•16m ago•1 comments

What's the Difference Between a Weighted Synapse and a Weighted Parameter?

https://weightedthoughts.substack.com/p/whats-the-difference-between-a-weighted
1•ylliprifti•17m ago•0 comments

If I hear "design pattern" one more time, I'll go mad

https://purplesyringa.moe/blog/if-i-hear-design-pattern-one-more-time-ill-go-mad/
3•zahlman•17m ago•0 comments

'A joyful day': final piece of Sagrada Familia's central tower put in place

https://www.theguardian.com/world/2026/feb/20/barcelona-sagrada-familias-church-central-tower-put...
2•toomuchtodo•17m ago•2 comments

Show HN: Joinirc.at: Link to your IRC server on any client to onboard new users

https://joinirc.at
1•reesericci•17m ago•0 comments

Death to Scroll Fade

https://dbushell.com/2026/01/09/death-to-scroll-fade/
1•birdculture•19m ago•0 comments

Your Transformer Is secretly an EOT Solver

https://elonlit.com/scrivings/your-transformer-is-secretly-an-eot-solver/
1•Anon84•20m ago•0 comments

Raison – Version control and real-time deployment for AI prompts

https://raison.ist
1•arbayi•21m ago•0 comments

Why my father ran the same small business for 30 years

https://siliconcanals.com/j-a-im-in-my-40s-and-i-finally-understand-why-my-father-ran-the-same-sm...
3•happy-go-lucky•23m ago•0 comments

Design time vs. Run time in Agentic engineering

https://twitter.com/taherchhabra/status/2024935862275113444
1•taherchhabra•23m ago•0 comments

Intuitive Intro to Reinforcement Learning for LLMs

https://mesuvash.github.io/blog/2026/rl_for_llm/
2•mesuvash•23m ago•0 comments

Komoot's decline after the Bending Spoons acquisition

https://usernebula.com/report/komoot-case-study
1•samberry•25m ago•0 comments

I built an agent that reads Jira tickets and opens pull requests automatically

https://github.com/ErezShahaf/Anabranch
1•ErezShahaf•27m ago•1 comments

Show HN: I built a Chrome extension to predict sun vs. shade for stadium seats

https://getsunscreen.com
1•evankaye•28m ago•0 comments