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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!

From Benchmarketing to Benchmaxxing

https://www.typedef.ai/blog/from-benchmarketing-to-benchmaxxing-what-40-years-of-database-evals-c...
1•cpard•32s ago•0 comments

Automate your version control with, GitMo

https://github.com/KyleBenzle/GitMo
1•Hilliard_Ohiooo•4m ago•1 comments

DeepSWE blows up AI coding leaderboard, crowns GPT-5.5, + ClaudeOpus loophole

https://venturebeat.com/technology/deepswe-blows-up-the-ai-coding-leaderboard-crowns-gpt-5-5-and-...
2•BriStoller•9m ago•0 comments

Imece – a decentralized AI compute cooperative

https://github.com/jstdv/imece
1•jstdv•10m ago•0 comments

Windows Reactor – React like WinUI 3 framework

https://github.com/microsoft/microsoft-ui-reactor
1•rexpan•13m ago•0 comments

Llms.txt Examples: Real Patterns for API Docs, Help Centers, and Developer Docs

https://docsalot.dev/blog/llms-txt-examples
1•fazkan•16m ago•0 comments

Prism is a purpose-built, redundant, global broadcasting platform

https://www.prism18.com/
1•petethomas•17m ago•0 comments

Scaling Laws for Agent Harnesses via Effective Feedback Compute

https://arxiv.org/abs/2605.29682
1•veryluckyxyz•18m ago•0 comments

2026 vibe coding tool comparison

https://read.technically.dev/p/2026-vibe-coding-tool-comparison
1•eigenBasis•19m ago•0 comments

AI Isn't Replacing Curious Developers

https://dataengineeringcentral.substack.com/p/ai-isnt-replacing-developers
1•eigenBasis•20m ago•0 comments

Uber and the Bitter Truth About Low AI ROI

1•thegrandidiot•26m ago•0 comments

Make Content That Sells

https://www.profitthreads.com
1•mattmerrick•29m ago•0 comments

After decades risking arrest, South Korea's tattoo artists step into limelight

https://www.bbc.com/news/articles/cg4pwdn6130o
3•breve•31m ago•0 comments

TempleOS WASM

https://templeos.reiko.app/
3•zdgeier•31m ago•0 comments

Perry Compiles TypeScript directly to executables using SWC and LLVM

https://www.perryts.com/
7•0x1997•39m ago•7 comments

OWASP Vulnerableapp

https://github.com/SasanLabs/VulnerableApp
2•preetkaran20•42m ago•1 comments

Should You Automate Your Life?

https://www.newyorker.com/culture/open-questions/should-you-automate-your-life
1•petethomas•43m ago•0 comments

Show HN: VT Code – open-source terminal coding agent in Rust

https://github.com/vinhnx/VTCode
3•vinhnx•46m ago•0 comments

A Famous Math Problem Stumped Humans for 80 Years. AI Just Cracked It

https://www.wsj.com/tech/ai/ai-math-solves-erdos-problem-openai-c4029e84
1•bryan0•48m ago•0 comments

Lessons from Shipping Persistent Memory for AI Agents

https://www.pingcap.com/blog/how-we-built-mem9-agent-memory-product/
1•jinqueeny•53m ago•1 comments

Utiq – The ad tracking of your (European) ISP and how to avoid it

https://korben.info/utiq-identifiant-publicitaire-telcos.html
1•LelouBil•54m ago•0 comments

CLI tool for automating personal data removal requests from broker sites

https://github.com/Enthropic-Data-LLC/data-removal
1•sohocs509•58m ago•1 comments

How Excel got agentic

https://commandline.microsoft.com/mukul-singh-excel-agent-mode-copilot-research-into-product/
1•azhenley•58m ago•0 comments

SpaceX has almost finished writing v1.0 of an in-house AI training stack in C

https://xcancel.com/elonmusk/status/2059884150187053488
1•SilverElfin•1h ago•2 comments

The Tech Behind an NBA Broadcast [video]

https://www.youtube.com/watch?v=mk_wdHePbtQ
1•b0ner_t0ner•1h ago•0 comments

US strike campaign against drug boats tops 200 deaths

https://www.independent.co.uk/news/world/americas/us-politics/drug-boat-strikes-cocaine-trafficki...
11•asdefghyk•1h ago•2 comments

The healthy life beverage book (1911)

https://gutenberg.org/cache/epub/78781/pg78781-images.html
3•petethomas•1h ago•1 comments

Measuring LLMs' ability to develop exploits

https://red.anthropic.com/2026/exploit-evals/
2•gmays•1h ago•0 comments

BP's annual report shows you shouldn't believe what you read

https://www.thetimes.com/business/companies-markets/article/bps-annual-report-shows-you-shouldnt-...
2•petethomas•1h ago•0 comments

John Cornyn loses GOP primary

https://liveclip.substack.com/p/john-cornyn-loses-gop-primary-brief
5•firasd•1h ago•0 comments