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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!

Are We Designing Products for Users or for AI Agents?

https://medium.com/@csal_19296/what-happens-when-we-start-designing-for-ai-instead-of-people-103e...
1•plr_cl•1m ago•0 comments

Claude Dynamic Workflows Inaccurate Permissions Docs

https://www.promptarmor.com/resources/claude-dynamic-workflows-use-incorrect-permissions
1•hackerBanana•2m ago•0 comments

Why Doesn't Apple Take Action Against App Store Copycats?

https://www.kapwing.com/blog/apples-inadequate-response-to-app-store-trademark-fraud/
1•jenthoven•2m ago•0 comments

Full Reverse Engineering of the TI-84 Plus Operating System

https://siraben.github.io/ti84p-re/
3•siraben•2m ago•0 comments

Apple Announces Liquid Glass Improvements and Transparency Slider

https://www.macrumors.com/2026/06/08/apple-announces-liquid-glass-improvements/
1•samtheDamned•3m ago•0 comments

Test Coverage Won't Save You

https://forestwalk.ai/blog/test-coverage-wont-save-you-from-incoherence/
1•jeromechoo•3m ago•0 comments

Sam Bankman-Fried files for a presidential pardon from Trump

https://www.theblock.co/post/404001/ftx-sam-bankman-fried-officially-files-presidential-pardon-trump
2•Anon84•3m ago•0 comments

Apple unveils new Siri AI, dedicated app, enhanced Apple Intelligence in iOS27

https://9to5mac.com/2026/06/08/new-siri-whats-new/
1•mmq•3m ago•0 comments

A Git/LFS-backed unified tool-output format for AI agents, with 95% token cut

https://old.reddit.com/r/codex/comments/1u0amqg/a_gitlfsbacked_unified_format_of_tool_output_for/
1•syumei•4m ago•0 comments

Why all new flags look the same

https://www.worksinprogress.news/p/good-design-is-ruining-american-flags
2•deunamuno•5m ago•1 comments

Repair Cafes urge consumers to fix their goods, not toss them

https://apnews.com/article/repair-cafes-economy-anticonsumerism-affordability-buy-nothing-d3acac3...
1•geox•5m ago•0 comments

Hard truths about (some) US farmers

https://www.youtube.com/watch?v=pgdLYugmkX8
1•darth_avocado•5m ago•0 comments

Show HN: A 15-minute backup audit framework for self-hosted homelabs

https://scholar.0xpi.com/blog/homelab-backup-audit-checklist
1•scholarnet-AI•6m ago•0 comments

Show HN: A free analyzer for spotting fake Amazon reviews via distribution shape

https://primereviewspro.com/spot-fake-amazon-reviews
1•scholarnet-AI•6m ago•0 comments

HN seems dead compared to say 10-15 years ago

1•morpheos137•6m ago•0 comments

Mister Rogers' Neighborhood

https://www.youtube.com/channel/UCQr37RLNViAkEwli9WiaUug
2•Tomte•7m ago•0 comments

Sponsonizer – Calendly for newsletter ad slots

https://sponsonizer.com
1•vivgui•7m ago•0 comments

I Love F1

https://www.gordonmclean.co.uk/2026/06/04/i-love-f1/
1•speckx•7m ago•0 comments

I Hacked into the Worst E-Bike (Reevo) and Fixed It [video]

https://www.youtube.com/watch?v=hPrtVGimBYs
1•mschuster91•7m ago•0 comments

Show HN: A minimal, ad-free World Cup web-app for fixtures and live scores

https://wc2026.bisheshtiwaree.com/
1•btiwaree•10m ago•0 comments

AI Has Come for Serif Fonts

https://www.wired.com/story/ai-has-come-for-serif-fonts/
1•apparent•10m ago•1 comments

The Life and Works of Raoul Bott

https://arxiv.org/abs/math/0201027
1•mindcrime•10m ago•0 comments

Show HN: Rayline routes Claude Code subagents to on-device and cheaper models

https://rayline.ai/
3•davidvgilmore•11m ago•1 comments

Thunderbird Littering My Home

https://thefoggiest.dev/2026/06/04/thunderbird-littering-my-home
3•speckx•12m ago•0 comments

A package manager for AI assets (and why the lock file is per-user)

https://sleuth-io.github.io/sx/2026/06/05/a-package-manager-for-ai-assets.html
2•detkin•12m ago•0 comments

Agent Toolkit for AWS

https://github.com/aws/agent-toolkit-for-aws
4•siegers•13m ago•0 comments

TSZIG: An experimental TypeScript-to-Zig compiler

https://github.com/orielhaim/tszig
1•orielhaim•14m ago•0 comments

Ask HN: Why hasn't there been a real competitor to Ticketmaster yet?

3•mdni007•15m ago•3 comments

U.S. Cities Lost the Economic Development Plot

https://commonedge.org/how-u-s-cities-lost-the-economic-development-plot/
2•speckx•15m ago•0 comments

Fake-AP – Bash script for a rogue Wi-Fi AP with live client/DNS telemetry

https://github.com/RiccardoCataldi/access-point
1•telesio•16m ago•0 comments