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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•10mo 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!

Enabling Media Router by default undermines Brave's privacy claims

1•noguff•6m ago•0 comments

Rackup, a Toolchain Manager for Racket

https://samth.github.io/rackup/
1•samth•14m ago•0 comments

Hyperlinks in Terminal Emulators

https://gist.github.com/egmontkob/eb114294efbcd5adb1944c9f3cb5feda
1•nvahalik•16m ago•0 comments

Heart, Head, Life, Fate

https://www.lrb.co.uk/the-paper/v48/n05/steven-shapin/heart-head-life-fate
1•Petiver•18m ago•0 comments

The Browser Becomes Your WordPress

https://wordpress.org/news/2026/03/announcing-my-wordpress/
1•computersuck•19m ago•0 comments

Stabilizing timelagged climate impacts rqrs net-negative emissions for centuries

https://iopscience.iop.org/article/10.1088/1748-9326/ae34ca
1•littlexsparkee•24m ago•0 comments

Gitana 18: technical choices for the new flying Ultim trimaran

https://www.boatnews.com/story/50717/gitana-18-radical-technical-choices-for-the-new-flying-ultim...
1•divbzero•32m ago•0 comments

Prowl – An agent discovery network (ASO for AI agents)

https://prowl.world
1•opcastil11•33m ago•0 comments

'Immersive Navigation' is the biggest Google Maps driving update in a decade

https://9to5google.com/2026/03/12/google-maps-immersive-navigation/
1•golfer•39m ago•0 comments

Claude Tried to Hack 30 Companies. Nobody Asked It To

https://trufflesecurity.com/blog/claude-tried-to-hack-30-companies-nobody-asked-it-to
1•RobLach•41m ago•1 comments

Can You Instruct a Robot to Make a PBJ Sandwich?

https://pbj.deliberateinc.com/
7•mooreds•41m ago•3 comments

Agent harness for building analytics into your app on top of ClickHouse

https://github.com/514-labs/moosestack
1•mooreds•45m ago•0 comments

OLAP migration complexity is the cost of fast reads (2025)

https://www.fiveonefour.com/blog/olap-migration-complexity
1•mooreds•46m ago•0 comments

Agentic Abuse at Tech Jobs

https://blog.alejandrowainzinger.com/agentic-abuse-at-tech-jobs
1•terelak•47m ago•0 comments

Sloppypaste: Pasting raw AI output without reading it

https://sloppypaste.com/
2•willwashburn•47m ago•1 comments

Teaching LLMs to reason like Bayesians

https://research.google/blog/teaching-llms-to-reason-like-bayesians/
1•gmays•49m ago•0 comments

Document retrieval that navigates structure instead of chunking

https://github.com/theeufj/RNSR
2•theeufj•57m ago•0 comments

Harry Potter by Balenciaga (2026 update by creator of seminal 2023 viral video)

https://www.youtube.com/watch?v=gtnt84CDP-s
1•TMWNN•59m ago•0 comments

Rep. Finke Was Right: Age-Gating Isn't About Kids, It's About Control

https://www.eff.org/deeplinks/2026/03/rep-finke-was-right-age-gating-isnt-about-kids-its-about-co...
5•iamnothere•59m ago•4 comments

Training Language Models via Neural Cellular Automata

https://hanseungwook.github.io/blog/nca-pre-pre-training/
1•Anon84•1h ago•0 comments

The Vibe Principles

https://github.com/kapitanluffy/vibe-principles
1•kapitanluffy•1h ago•0 comments

8,600 n8n workflow templates organized into a browsable GitHub repo

https://github.com/ScraperNode/awesome-n8n-templates
1•emery_p•1h ago•0 comments

Capability-based authorization for AI agents

https://github.com/Connerlevi/CapNET
1•deathclik•1h ago•1 comments

Hedystia 1.10 – Type Mastery is here

https://docs.hedystia.com
1•Zastinian•1h ago•0 comments

Laid off? Start a small business. Save hours of research

https://startinstates.com/guides
1•GKakhiani•1h ago•0 comments

Apple's App Store in China gets lower 25% commission to appease regulators

https://appleinsider.com/articles/26/03/13/apples-app-store-in-china-gets-lower-25-commission-to-...
1•spenvo•1h ago•0 comments

Leaderboard of Leaderboards – A Real-Time Meta-Ranking of AI Benchmarks

https://huggingface.co/posts/mayafree/802385854425752
2•seawolf2357•1h ago•0 comments

Glimpse: Native macOS micro-UI for scripts and agents

https://github.com/hazat/glimpse
1•rahimnathwani•1h ago•0 comments

List of animals awarded human credentials

https://en.wikipedia.org/wiki/List_of_animals_awarded_human_credentials
2•staticshock•1h ago•0 comments

Pi-generative-UI: Claude.ai's generative UI reverse-engineered, rebuilt for pi

https://github.com/Michaelliv/pi-generative-ui
1•rahimnathwani•1h ago•0 comments