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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!

Casbin Gateway: a security gateway for the AI coding agents on your machine

https://github.com/apache/casbin-gateway
1•jhan667•42s ago•0 comments

Astro Mechanica (2024)

https://www.notboring.co/p/astro-mechanica
1•simonebrunozzi•1m ago•0 comments

Frontier Labs Are Selling Garbage to Fools in Washington

https://deadneurons.substack.com/p/frontier-labs-are-selling-garbage
2•nr378•6m ago•0 comments

Interview reveals Ed Zitron does not understand how AI works at any level

https://twitter.com/AlexanderMcCoy4/status/2100744088169447816
2•enraged_camel•9m ago•1 comments

Show HN: Roffume – Add fragrance to your resume with roff

https://github.com/sebastiancarlos/roffume
1•httbs•9m ago•0 comments

Investors warn Anthropic could struggle to sustain revenues post-IPO

https://www.ft.com/content/96d0a206-a37b-4166-b78d-b27ed24f7d57
1•1vuio0pswjnm7•11m ago•0 comments

Show HN: A browser MMO designed to be played by scripts, not people

https://space-core.at/
1•SpaceCoreDev•14m ago•0 comments

AI Journal 2: Vibe-Coding for Fun and Profit

https://devshrine.net/blog/ai-journal-2/
1•renehsz•16m ago•0 comments

Why MCP Was Always a Bad Idea

https://maharship.com/blog/why-mcp-was-always-a-bad-idea/
7•maharshi365•17m ago•1 comments

The Economics of Open-Weight Inference [pdf]

https://data.ornn.com/the-economics-of-open-weight-inference.pdf
1•adletbalzhanov•17m ago•0 comments

AI-native degree planning software for universities

https://www.coursetrees.com
1•noahfinkelstein•17m ago•1 comments

Reviving the language that brought us the Jak and Daxter Series

https://opengoal.dev/
1•birdculture•18m ago•0 comments

Exploration-Exploitation Dilemma

https://en.wikipedia.org/wiki/Exploration%E2%80%93exploitation_dilemma
1•azhenley•21m ago•0 comments

Tg-Rich-Converter: Streaming LLM Markdown and LaTeX to Telegram Bot API 10.1

https://github.com/kobaltgit/tg-rich-converter
1•kobaltGIT•21m ago•0 comments

Give, Don't Take

https://schestowitz.com/Weblog/archives/2026/09/20/give-dont-take/
1•amcclure•23m ago•0 comments

Experiments in Squatting

https://moxie.org/stories/together-two/
2•simonebrunozzi•24m ago•0 comments

The Hierarchy of Money

https://gregorygundersen.com/blog/2026/09/20/hierarchy-of-money/
4•gwgundersen•24m ago•0 comments

JEV OAS Sentinel – catch breaking API changes hidden in OpenAPI prose

https://github.com/marketplace/actions/jev-oas-sentinel
1•bookcool•25m ago•0 comments

Slapp Censorship – Pt. 190/200: Plagiarism, Back Doors, and Sabotage of Linux

https://techrights.org/n/2026/09/20/SLAPP_Censorship_Part_190_Out_of_200_Plagiarism_Back_Doors_an...
2•amcclure•25m ago•0 comments

GNU/Linux Has Grown a Lot Lately

https://techrights.org/n/2026/09/20/GNU_Linux_Has_Grown_a_Lot_Lately.shtml
2•amcclure•26m ago•0 comments

Safety Warning: Carborane Mixtures

https://www.science.org/content/blog-post/safety-warning-carborane-mixtures
2•EA-3167•29m ago•0 comments

The Problem Is Prompt Debt

https://www.dbreunig.com/2026/06/22/the-problem-is-prompt-debt.html
2•raphaelcosta•30m ago•0 comments

How workers are unlocking new ways of working

https://openai.com/index/unlocking-new-ways-of-working/
2•rdslw•31m ago•0 comments

Tensorbrife

https://www.tensorbrife.site/
2•tjjune•31m ago•1 comments

Show HN: Emetgate – a verification gate between an LLM and your source tree

https://github.com/emetgate/emetgate
2•ugurcl•32m ago•0 comments

How to Be Sovereign

1•At1C•39m ago•0 comments

Post-Quantum OpenID Connect

https://openid.net/post-quantum-openid-connect/
2•EthanHeilman•40m ago•0 comments

Geatsc – TypeScript-to-C++ Compiler

https://github.com/geastack/compiler
1•arbayi•41m ago•0 comments

One model writes the code, a different model reviews it

https://github.com/WDahah/portable-dsh-multi-agent-plugin
1•WDahah•43m ago•0 comments

Show HN: SubCrisp, a free subscription tracker that shows what cancelling saves

https://subcrisp.com/
1•dablity•44m ago•0 comments