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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!

Factory-built housing hasn't taken off in California

https://www.latimes.com/california/story/2026-02-14/factory-built-housing-hasnt-taken-off-in-cali...
1•PaulHoule•2m ago•0 comments

Ask HN: Cognitive Offloading to AI

1•daringrain32781•2m ago•1 comments

Show HN: Upti – Track cloud provider incidents and get alerts

https://apps.apple.com/us/app/upti-cloud-status-monitor/id6757987553
1•ismailperim•2m ago•0 comments

Green Lumber Fallacy in Software Engineering

https://www.chrisbehan.ca/posts/green-lumber-fallacy-in-software
1•mooreds•2m ago•0 comments

Realistic Adversarial Testing of Computer-Use Agents in Web-OS Environments

https://arxiv.org/abs/2505.21936
1•yakkomajuri•4m ago•0 comments

Show HN: G13u.com An automated SRE for AI apps

https://g13u.com/
2•gerom•5m ago•1 comments

Documentary about Mozilla Firefox at pwn2own (part 1) [video]

https://www.youtube.com/watch?v=YQEq5s4SRxY
1•todsacerdoti•6m ago•0 comments

Ask HN: Do US presidents have less fiduciary liability than CEOs?

1•stopbulying•6m ago•2 comments

As a non-coder(HR professional) I built my first website all by vibe coding

2•VidhiKesarwani•8m ago•0 comments

America's most partisan voters hold the most voting power

https://www.npr.org/2026/02/22/nx-s1-5707254/power-trump-congress-house-representatives-voters-co...
5•rbanffy•10m ago•1 comments

Higher / Lower Game

https://quest.touchgrass.blog/
2•abdullah9•11m ago•1 comments

Six Math Essentials

https://terrytao.wordpress.com/2026/02/16/six-math-essentials/
2•digital55•14m ago•1 comments

Symplex, an open-source protocol semantic negotiation between distributed agents

https://github.com/olserra/symplex
1•olserra•14m ago•1 comments

Black-White Array: fast, ordered and based on with O(log N) memory allocations

https://github.com/dronnix/bwarr
1•platzhirsch•15m ago•1 comments

Show HN: OpenGoat, hierarchical orgs for OpenClaw agents

https://github.com/marian2js/opengoat
1•marian2js•16m ago•1 comments

An Unbothered Jimmy Wales Calls Grokipedia a 'Cartoon Imitation' of Wikipedia

https://gizmodo.com/an-unbothered-jimmy-wales-calls-grokipedia-a-cartoon-imitation-of-wikipedia-2...
4•rbanffy•17m ago•1 comments

Training a Human Takes 20 Years of Food

https://www.news18.com/world/training-a-human-takes-20-years-of-food-sam-altman-on-how-much-power...
2•Aldipower•18m ago•0 comments

The Origins of Agar

https://www.asimov.press/p/agar
1•mailyk•18m ago•0 comments

Dell PC teardown shows mechanically locked 12V-2×6 GPU power connector

https://videocardz.com/newz/dell-pc-teardown-shows-mechanically-locked-12v-2x6-gpu-power-connector
1•layer8•18m ago•0 comments

NanoClaw Moved from Apple Containers to Docker

https://twitter.com/Gavriel_Cohen/status/2025603982769410356
18•simplesort•22m ago•1 comments

Prefer If Statements to Polymorphism

https://htmx.org/essays/prefer-if-statements/
2•birdculture•22m ago•0 comments

I built Timeframe, our family e-paper dashboard

https://hawksley.org/2026/02/17/timeframe.html
1•saeedesmaili•22m ago•0 comments

Building a (Bad) Local AI Coding Agent Harness from Scratch

https://www.appsoftware.com/blog/building-a-bad-local-ai-coding-agent-harness-from-scratch
2•appsoftware•25m ago•2 comments

Centerview Partners settles dispute over junior banker's need for 8 hours sleep

https://www.fnlondon.com/amp/articles/centerview-partners-settles-dispute-over-junior-bankers-nee...
1•helsinkiandrew•26m ago•1 comments

Heliostat: Harnessing Ray Tracing Accelerators for Page Table Walks – ISCA 2025 [video]

https://www.youtube.com/watch?v=gJw8D0kxmF4
1•matt_d•27m ago•1 comments

Convert Any MCP to Code Mode MCP

https://twitter.com/cahidarda/status/2025629891908030697
2•cahid_arda•27m ago•1 comments

Baby Rudin

https://en.wikipedia.org/wiki/Principles_of_Mathematical_Analysis
1•sonabinu•27m ago•0 comments

Bootstrapping Is Not Security Paranoia

https://alganet.github.io/blog/2026-02-22-15-Bootstrapping-Is-Not-Security-Paranoia.html
1•gaigalas•36m ago•0 comments

Loops is a federated, open-source TikTok

https://joinloops.org/
2•Gooblebrai•38m ago•0 comments

Show HN: Claude Agent SDK for Laravel – Build AI Agents with Claude Code in PHP

https://github.com/mohamed-ashraf-elsaed/claude-agent-sdk-laravel
1•mohamedelsaed•39m ago•0 comments