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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!

Effect 4.0

https://effect.website/blog/releases/effect/40
1•stevefan1999•1m ago•1 comments

Claude Code Mods: plugins may now modify deeper behavior

https://code.claude.com/docs/en/plugins/mods/overview
1•rtuin•2m ago•0 comments

A Tale of Two Cultures: Can Agentic Coding Close the Gap? [video]

https://www.youtube.com/watch?v=7HWIUTcGFQ4
1•gmays•2m ago•0 comments

Nvidia launches Open Agent Safety Platform to restrain rogue AI agents

https://www.tomshardware.com/tech-industry/artificial-intelligence/nvidia-launches-open-agent-saf...
1•sbulaev•4m ago•0 comments

I'm leaving Reddit because of RSS

https://lapcatsoftware.com/articles/2026/10/1.html
3•speckx•4m ago•0 comments

My personal AI financial advisor

https://genaipod.substack.com/p/personal-finance
2•shashu10•4m ago•1 comments

Open-Source Next.js 14 Boilerplate with Binance Pay (0% Crypto Gateway Fees)

https://github.com/Shokun123/binance-pay-saas-starter
1•shokun123•5m ago•0 comments

Empire State Building Airship Dock: The Mooring Mast Story

https://funfactz.com/places/empire-state-building-airship-mooring-mast-gangplank
1•thunderbong•5m ago•0 comments

I Went from Lipid Denialist to Lipid-Lowering Advocate

https://www.irondpc.com/post/how-i-went-from-lipid-denialist-to-lipid-lowering-advocate-how-conse...
1•brandonb•5m ago•0 comments

Google Cloud SDK for Server-Side Swift (Linux) Reaches GA

https://github.com/googleapis/google-cloud-swift
1•dcgudeman•7m ago•0 comments

Oxygen-deprived underwater zones may not be "dead zones" but clue to early life

https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2026AV002570
2•gumby•7m ago•0 comments

Show HN: PBI Guard – Stop people from messing up your Power BI (you included)

https://patens-dev.github.io/pbi-guard/
1•randomlyGenerat•8m ago•0 comments

Strands Decider Decision Model

https://strandsagents.com/blog/introducing-strands-decider/
1•xendo•13m ago•0 comments

Decode-Latency Feedback Prefill: A Model-Free Controller

https://arxiv.org/abs/2609.38386
1•gauravapiscean•14m ago•1 comments

Giving friends custom text buzzes based on Morse code

https://liquidbrain.net/blog/giving-friends-custom-text-buzzes-based-on-morse-code/
1•evakhoury•14m ago•0 comments

Sources: US tells France, Germany to release diesel stocks or face US export ban

https://www.reuters.com/business/energy/us-tells-france-germany-release-diesel-stocks-or-face-us-...
2•mikhael•16m ago•1 comments

OpenAI Elevated Issues – ChatGPT Down

https://status.openai.com
2•robeym•17m ago•0 comments

US judge dismisses Chegg, Penske antitrust suits over Google AI Overviews

https://reuters.com/legal/litigation/google-wins-dismissal-chegg-penske-media-lawsuits-over-ai-ov...
3•utiiiD•17m ago•0 comments

Anatomy of a Lean Proof for Software Engineers

https://agostbiro.net/posts/2026-10-anatomy-of-a-lean-proof/
1•abiro•18m ago•0 comments

Ovarian Biology: Revisiting the rete ovarii (2025)

https://elifesciences.org/articles/106648
1•Tomte•18m ago•0 comments

Show HN: D-Engine – deterministic LLM code edits, 42× fewer tokens than an agent

https://github.com/corruchaga/D-Engine
1•sergiocorruchag•19m ago•0 comments

Star Hop: Endless Galaxy

https://www.star-hop.app/
1•dschnelly•21m ago•0 comments

MTV Didn't Die of Bad Taste: It Died the Day the Doors Multiplied

https://comuniq.xyz/Music/post?t=1716
1•01-_-•21m ago•1 comments

First enhanced geothermal power plant completed in just 23 months

https://techcrunch.com/2026/10/01/worlds-first-enhanced-geothermal-power-plant-completed-in-just-...
2•speckx•21m ago•0 comments

I rebuilt Claude Code's terminal UI in Rust. Then I deleted 12,000 lines of it

https://medium.com/@simonrothgang/i-rebuilt-claude-codes-terminal-ui-in-rust-then-i-deleted-12-00...
1•srothgan•23m ago•0 comments

An in-the-wild iOS bug with a possible WhatsApp zero-click path

https://calif.io/research/the-great-glyph-grift
1•metrofun•24m ago•0 comments

Tell HN: Get the app to keep using Reddit

4•sippingabonedry•24m ago•1 comments

Postgres DELETE can actually scale

https://www.dbos.dev/blog/scaling-deletions-in-postgres
1•KraftyOne•29m ago•0 comments

The Programming Language That Referees Mathematics – Leo de Moura [video]

https://www.youtube.com/watch?v=ZpQFebTK75A
1•digital55•29m ago•0 comments

Fieldwork Icon Design Benchmark

https://fieldwork.software/eval/icon-design
2•jeffpersonified•31m ago•1 comments