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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•8mo 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!

Building AIs that do human-like philosophy

https://joecarlsmith.com/2026/01/29/building-ais-that-do-human-like-philosophy/
1•gmays•1m ago•0 comments

China Bans Retractable Door Handles on Cars as Safety Concerns Grow

https://www.wsj.com/business/autos/china-bans-retractable-door-handles-on-cars-as-safety-concerns...
1•impish9208•1m ago•1 comments

Show HN: WebRockets – Rust-powered WebSockets library for Python

https://github.com/ploMP4/webrockets
1•ploMP4•1m ago•0 comments

I Hate Fish

https://randsinrepose.com/archives/i-hate-fish/
1•digitallogic•2m ago•0 comments

Show HN: LLM Shield (Prompt Injection protection for developers)

https://glitchward.com/llm-shield
1•eyeskiller•3m ago•0 comments

China to See Solar Capacity Outstrip Coal Capacity This Year

https://e360.yale.edu/digest/china-solar-coal-2026
2•speckx•4m ago•0 comments

Strategies of cooperation and defection in five large language models

https://arxiv.org/abs/2601.09849
1•PaulHoule•4m ago•0 comments

A discussion about AI consciousness in Reddit

https://old.reddit.com/r/Moltbook/comments/1qutciy/consciousness/
1•yanivleven•4m ago•0 comments

Windows 11 adoption might have flatlined

https://www.windowscentral.com/microsoft/windows-11/windows-11s-growth-has-officially-hit-a-brick...
2•TechSquidTV•6m ago•0 comments

Show HN: Sandboxing untrusted code using WebAssembly

https://github.com/mavdol/capsule
1•mavdol04•6m ago•0 comments

How I fixed a small bug in an app I use daily

https://akshaychugh.xyz/writings/png/instapaper
2•akshay2603•9m ago•0 comments

Show HN: macOS bar for Claude Code skills performance

https://github.com/fernandezbaptiste/trode
1•jorkim32•9m ago•0 comments

Discovery Alert: An Ice-Cold Earth? Science

https://science.nasa.gov/universe/exoplanets/discovery-alert-an-ice-cold-earth/
3•JeanKage•10m ago•0 comments

GitHub: Competitive Intelligence and Monitoring List

https://github.com/Rainmaker-Ventures/awesome-competitive-intelligence-and-monitoring
2•mlukaszczyk•10m ago•1 comments

The Day the Music Died

https://en.wikipedia.org/wiki/The_Day_the_Music_Died
1•edent•11m ago•0 comments

Fungi as a Building Material: Kit Examines Innovative Materials

https://www.kit.edu/kit/english/202601-fungi-as-a-building-material-kit-examines-innovative-mater...
1•JeanKage•11m ago•0 comments

Show HN: govalid – Go validation without reflection (5-44x faster)

https://github.com/sivchari/govalid
1•sivchari•11m ago•0 comments

Show HN: Know what your dev team shipped, without reading code

1•inferno22•13m ago•0 comments

Show HN: Building a AI junior marketing team. tell me why this won't work

https://www.blinkadz.com/
1•vipulsharma144•13m ago•0 comments

3D-Printed Batteries Put Power in Every Nook and Cranny

https://spectrum.ieee.org/3d-printed-batteries
1•JeanKage•13m ago•0 comments

Floating-point accuracy visualization of Julia math functions

https://discourse.julialang.org/t/floating-point-accuracy-visualization-example-the-ulp-error-for...
1•darboux•14m ago•0 comments

Elon Musk joins his rocket and AI businesses into a single company

https://apnews.com/article/spacex-xai-musk-space-2079f03fa888652b7fe836afe8b670a1
1•makerdiety•15m ago•0 comments

Anthropic's Performance Take-Home: A 65x Optimization (For Dummies)

https://www.ikot.blog/anthropic-take-home-for-dummies
4•seeall•15m ago•1 comments

Show HN: EasyClaw – lightweight GUI installer for OpenClaw

https://easyclaw.com
1•svemyh•15m ago•0 comments

Cloudflare Is Down

1•ransom1538•16m ago•1 comments

StreetPack – Debut

https://github.com/TrishulaSoftware/StreetPack
1•trishulasoftwre•16m ago•1 comments

The Guardrail Problem

https://www.robpanico.com/articles/display/?entry_short=the-guardrail-problem
1•retrocog•17m ago•1 comments

De-Mystifying Agentic AI: Building a Minimal Agent Engine with Clojure

https://serefayar.substack.com/p/minimal-agent-engine-from-scratch-with-clojure
3•simonpure•17m ago•0 comments

Fact Checking Moravec's Paradox

https://www.normaltech.ai/p/fact-checking-moravecs-paradox
1•gmays•17m ago•0 comments

Auto-Jira: AI that detects errors, diagnoses root causes, and files Jira tickets

https://medium.com/@tintinwinata/built-an-ai-that-auto-creates-jira-tickets-from-production-error...
1•tintinwinata•17m ago•1 comments