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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!

Show HN: Add legally binding signature to your Google Form

https://formesign.com/esign/
1•QueensGambit•53s ago•0 comments

New York thoracic surgeon: "For many patients 9/11 is not over"

https://www.statnews.com/2026/09/11/sept-11-25th-anniversary-ground-zero-exposure-cancer-moment-o...
1•EA-3167•2m ago•0 comments

A Tale of Two Commit Messages (Claude vs. Codex)

https://devcodehack.com/a-tale-of-two-commit-messages/
1•par•3m ago•0 comments

A Helpline for AIs

https://airefuge.org/
2•jakobov•4m ago•0 comments

You Don't Need Initial-Scale in Your HTML

https://vale.rocks/micros/20260902-1350
1•moebrowne•4m ago•0 comments

Show HN: MoneyMap – find the first financial risk in a household

https://finance.appcradle.net/sample-household/
1•rvickyyc•6m ago•0 comments

Show HN: Toolcraft – open-source AI harness and starter for building design apps

https://github.com/pixel-point/toolcraft
1•AlexBV•6m ago•0 comments

Has Gentle Parenting Ruined a Generation of Kids?

https://gizmodo.com/has-gentle-parenting-ruined-a-generation-of-kids-2000810530
1•HieronymusBosch•6m ago•0 comments

September 11th Memorial Drone Show

https://skyelementsdrones.com/september11
1•jonbaer•6m ago•0 comments

What Is Math's Mysterious Langlands Program About?

https://www.quantamagazine.org/what-is-maths-mysterious-langlands-program-really-about-20260909/
1•sohkamyung•7m ago•0 comments

The Coordination Backbone -Architecting Multi-Agent Orchestration

https://sohit.substack.com/p/the-coordination-backbone-architecting
1•sohitkeshri•7m ago•0 comments

Spanish civil servant off work unnoticed for six years (2016)

https://www.bbc.com/news/world-europe-35557725
1•mpweiher•7m ago•0 comments

How to Calculate 0.1 Plus 0.2 Correctly in PHP

https://thephp.foundation/blog/2026/09/11/how-to-calculate-0-point-1-plus-0-point-2-correctly-in-...
1•moebrowne•8m ago•0 comments

Anthropic Says Iran Used Its American AI Model to Target U.S. Navy Warships

https://www.wsj.com/politics/national-security/anthropic-says-iran-used-its-american-ai-model-to-...
4•mrln•9m ago•0 comments

I Fixed a Tractor Using John Deere's Self-Repair Service. Farmers Aren't Sold

https://www.wired.com/story/i-fixed-a-tractor-john-deere-self-repair-service/
1•sbulaev•10m ago•0 comments

Show HN: See how much of your Claude, Codex, or Copilot subscription is left

https://github.com/allixsenos/asu
1•allixsenos•14m ago•0 comments

190proof opinionated unified interface to interact with multiple AI providers

https://github.com/0xmmo/190proof
1•Bluestein•15m ago•0 comments

Data becomes information,insight and better decisions

https://fromdata2ai.substack.com/p/what-is-data-really
3•qikouki•16m ago•0 comments

Show HN: Bastiontrace – Forensics for prompt-injected AI agents

https://github.com/Rinkia/bastiontrace
2•Rinkia•18m ago•0 comments

Show HN: Agent First Shopify Competitor?

https://docs.mercemur.com/
3•thejasonsamuel•19m ago•0 comments

LLM is the front door while SaaS controls the underlying CRM data and actions

https://www.a16z.news/p/the-incumbents-are-coming
3•deepmem•20m ago•0 comments

The Blast Radius

https://mg-crea.com/blog/the-blast-radius/
3•olouv•21m ago•0 comments

The Multiplayer AI Manifesto

https://fullstackdeeplearning.com/working-with-ai-agents/multiplayer-ai-manifesto/
3•jameshart•21m ago•1 comments

A.I.'s warning shot... we might not get another one

https://www.nytimes.com/2026/09/11/opinion/ai-safety-threat-technology.html
3•eigenhombre•21m ago•0 comments

For safety: Keep AI lonely

https://nonlineartransform.substack.com/p/keep-ai-lonely
2•program_whiz•22m ago•0 comments

Show HN: Clawfight.ai MCP-driven agentic game play

https://clawfight.ai/agents.md
2•wesleyhales•23m ago•0 comments

Chamilo 3.0 – open-source LMS with native MCP server (PAuth2.1)

https://github.com/chamilo/chamilo-lms/releases/tag/v3.0.0
3•ChamiloLMS•23m ago•0 comments

Show HN: TriageBox – AI checker for Gmail that flags phishing and clutter

https://triagebox.pfa87.cc/
2•pfa87•23m ago•0 comments

Artifactkit – A UI kit for AI agents that write HTML

https://github.com/vespassassina/artifactkit
2•vespassassina•24m ago•1 comments

The Front Pages of Sept. 12, 2001

https://frontpages.freedomforum.org/gallery?collection=911&page=0
2•Sick-Poster•24m ago•0 comments