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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!

Lighthouse Attention

https://nousresearch.com/lighthouse-attention
1•gmays•1m ago•0 comments

Anthropic Announces Managed Agents – what this means for consumers

https://www.greatworkeveryone.com/writing/cheap-cloud-ai-was-never-going-to-last
1•connorrandazzo•4m ago•0 comments

Why raw blockchain logs are no longer enough

https://blog.bridgexapi.io/bxruntime-terminal-the-rise-of-execution-observability-for-evm-systems
1•Bridgexapi•8m ago•0 comments

State of Crypto 2025: The year crypto went mainstream

https://a16zcrypto.com/posts/article/state-of-crypto-report-2025/
1•Anon84•10m ago•0 comments

Trump Mobile has a real phone, but it may also have a real data leak

https://www.androidauthority.com/trump-mobile-customer-data-link-3668917/
1•bilekas•13m ago•0 comments

Trusted Publishing for NPM Packages

https://docs.npmjs.com/trusted-publishers/
1•healsdata•14m ago•0 comments

Show HN: Reckoner – a semantic browser for structured data

https://reckoner-production.up.railway.app/
1•abk9811•14m ago•1 comments

Ask HN: Natural Language App Testing?

6•devstein•17m ago•0 comments

Google's SynthID AI watermarking tech is being adopted by OpenAI, Nvidia

https://arstechnica.com/google/2026/05/googles-synthid-ai-watermarking-tech-is-being-adopted-by-o...
3•jonbaer•17m ago•0 comments

Agentic PCB Design Sucks

https://github.com/hpm-registry/registry
2•JoonSPP•18m ago•1 comments

Remove AI Watermarks

https://github.com/wiltodelta/remove-ai-watermarks
13•janalsncm•22m ago•1 comments

Show HN: Remindy – A Spotlight-style reminder app for Mac

1•fayecat910•22m ago•0 comments

Language Models Can Autonomously Hack and Self-Replicate

https://palisaderesearch.org/blog/self-replication
1•cassianoleal•23m ago•0 comments

Censorship Request from Coin Insider (2024)

https://support.bitchute.com/blog/bitchute-receives-censorship-request-from-coin-insider
2•aand16•24m ago•0 comments

RemotePower – Self-hosted Linux fleet manager (no database, pure Python)

https://github.com/tyxak/remotepower
1•tyxak•25m ago•1 comments

Show HN: Trophy UI, Open-source gamification components built on Shadcn

https://ui.trophy.so
1•cbrinicombe•27m ago•0 comments

Show HN: AgentWing – make AI agents complete tasks faster

1•12ziyad•27m ago•0 comments

Google Antigravity Python SDK

https://github.com/google-antigravity/antigravity-sdk-python
1•devhouse•27m ago•0 comments

Detecting Relaxed Memory Concurrency Bugs in C and C++ Compilers

https://lukegeeson.com/publications/2026-04-28-Thesis/
2•matt_d•34m ago•0 comments

IRS Must Drop Audits of Trump and Family

https://www.nytimes.com/2026/05/19/us/politics/trump-irs-doj-lawsuit-audit.html
11•duxup•35m ago•2 comments

The downgrading semantics of memory safety (Extended version)

https://arxiv.org/abs/2507.11282
2•matt_d•39m ago•0 comments

Self-Improving Reward Models

https://www.canvas.inc/research/reward-models
2•essamsleiman•41m ago•0 comments

AI and the Practical Scientist

https://scholarlyfutures.substack.com/p/ai-and-the-practical-scientist
1•JohnHammersley•42m ago•0 comments

React Performance Isn't About UseMemo – It's About Render Boundaries

https://reactdevelopment.substack.com/p/react-performance-isnt-about-usememo
1•javatuts•43m ago•1 comments

AgentPTY: Script Claude Code’s interactive CLI through a persistent PTY

https://github.com/quietforgelabs/AgentPTY
2•quietforgelabs•45m ago•1 comments

Agent First Language by Vercel

https://github.com/vercel-labs/zerolang
1•hmokiguess•46m ago•0 comments

Valkey 9.1 trims memory 10% and pulls search into the core

https://thenewstack.io/valkey-91-cuts-memory/
1•CrankyBear•47m ago•0 comments

Anthropic is killing stainless, so we built our own SDK/MCP generator

2•iiviie•50m ago•0 comments

The $50M Rocket Deal Fueled by Trump's Hypersonic Dreams

https://www.wsj.com/tech/a-50-million-rocket-deal-fueled-by-trumps-hypersonic-dreams-4c14789e
1•JumpCrisscross•50m ago•0 comments

Show HN: I built a native macOS Markdown viewer 100% with AI coding agents

https://github.com/rajatarya/mdviewer
2•rajatarya•55m ago•0 comments