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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!

Brunelly – AI platform that helps turn ideas into production software

https://brunelly.com/
1•rihabz•40s ago•1 comments

DOGE staffer who flagged grants for 'DEI' struggles to define the term [video]

https://www.youtube.com/watch?v=WpbGF7l-t2w
1•marysminefnuf•1m ago•0 comments

My Favourite Thing About Rust Is the Compiler

https://mayberay.bearblog.dev/my-favourite-thing-about-rust-is-the-compiler/
2•mugamuga•5m ago•0 comments

Ask HN: Do You Use Ublockdns.com?

2•SoftwareEn2•6m ago•0 comments

Agency Agents: Open-source framework for building multi-agent AI workflows

https://github.com/msitarzewski/agency-agents
2•paidx•7m ago•0 comments

Replit Agent 4: Built for Creativity

https://blog.replit.com/introducing-agent-4-built-for-creativity
2•simonebrunozzi•8m ago•0 comments

Distributed Python dataframes and machine learning with Livebook and Elixir

https://dashbit.co/blog/distributed-python-livebook
2•ahamez•11m ago•0 comments

I don't know if I like working at higher levels of abstraction

https://xeiaso.net/blog/2026/ai-abstraction/
2•watermelon0•11m ago•0 comments

Reddit Post

https://old.reddit.com/r/PisequaltoNP/comments/1rrj2ob/solving_sat_via_generalized_rubiks_cube_re...
2•KaoruAK•11m ago•0 comments

I built an app that aligns GNSS clock residuals to 99.9999% geometric linearity

2•CitizenKorea•14m ago•0 comments

Learning flywheels are all you need

https://invertedpassion.com/learning-flywheels-are-all-you-need/
1•twapi•14m ago•0 comments

James Randi – Talks at Google (2007) [video]

https://www.youtube.com/watch?v=MTPj9VlNzQ0
1•nomilk•16m ago•0 comments

BrowseComp: The Benchmark That Tests What AI Agents Can Find

https://oss.vstorm.co/blog/browsecomp-ai-agent-benchmarks/
1•kacper-vstorm•21m ago•1 comments

GitHub Copilot: Model Routing Error

https://devactivity.com/posts/trends-news-insights/copilots-hidden-logic-how-ai-model-routing-imp...
1•danebalia•23m ago•1 comments

Puzzle Planet

https://mathwithbaddrawings.com/2026/03/11/puzzle-planet/
1•mci•24m ago•0 comments

Returning to Rails in 2026

https://www.markround.com/blog/2026/03/05/returning-to-rails-in-2026/
1•stanislavb•25m ago•0 comments

Show HN: ClawJetty: See what your AI Agent is Doing

https://clawjetty.com/#
1•andes314•25m ago•0 comments

Insights into US life expectancy stagnation from birth cohort mortality dynamics

https://www.pnas.org/doi/10.1073/pnas.2519356123
2•littlexsparkee•26m ago•0 comments

The Anthropic Institute

https://www.anthropic.com/news/the-anthropic-institute
1•SilverElfin•26m ago•0 comments

TypeUI

https://www.typeui.sh/
1•handfuloflight•32m ago•0 comments

Show HN: An open-source AI Quant Agent trading live with my own $1000

https://github.com/chenjy16/OpenPilot
1•chenjy16•35m ago•2 comments

Targeting mistake led to US missile strike on Iranian girls school-media reports

https://www.abc.net.au/news/2026-03-12/us-behind-iran-girls-school-strike-media-reports/106444554
4•asdefghyk•39m ago•1 comments

AI Isn't Lightening Workloads. It's Making Them More Intense

https://www.wsj.com/tech/ai/ai-isnt-lightening-workloads-its-making-them-more-intense-e417dd2c
3•thm•39m ago•0 comments

Tracing Discord's Elixir Systems (Without Melting Everything)

https://discord.com/blog/tracing-discords-elixir-systems-without-melting-everything
1•manusachi•40m ago•0 comments

AI Poisoning for Fun and Profit

https://www.amazon.com/AI-Poisoning-Fun-Profit-Corrupting/dp/B0GRR29HJK/
1•ada1981•40m ago•1 comments

Show HN: CmdRunner – Upload test cases and an AI agent runs them in a browser

1•kiru-cmdrunner•40m ago•0 comments

Kremlin backs covert campaign to keep Viktor Orbán in power

https://www.ft.com/content/34df20f9-487b-4cb6-9dc9-d676d959d1ed
6•doener•48m ago•0 comments

I'm Rebuilding Mars MIPS for You

https://webmars.nfiles.top/
1•nenepbl•48m ago•1 comments

LLM Evaluation Metrics: The Ultimate LLM Evaluation Guide

https://www.confident-ai.com/blog/llm-evaluation-metrics-everything-you-need-for-llm-evaluation
2•vismit2000•51m ago•0 comments

Making Sense of the DXY

https://dm13450.github.io/2026/03/10/Making-Sense-of-the-DXY.html
1•dm13450•51m ago•0 comments