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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•12mo 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!

Too Shall Pass

https://ratfactor.com/cards/this-too-shall-pass
1•ibobev•1m ago•0 comments

Show HN: Feeding agents with session recording data

1•andriosr•1m ago•0 comments

The Geometry of Color in the Light of a Non-Riemannian Space

https://onlinelibrary.wiley.com/doi/10.1111/cgf.70136
1•bookofjoe•1m ago•0 comments

There's an Unhinged New Video Game About Trump and the Iran War

https://www.wired.com/story/video-game-trump-iran-war/
1•timeisapear•1m ago•1 comments

Show HN: Send Cold Emails with AI Agents

https://github.com/open-salesblink/skill
1•sushant20•1m ago•0 comments

Paperclip The human control plane for AI labor

https://paperclip.ing/
1•swazzy•3m ago•0 comments

After Deaths, Lawsuits Against A.I. Companies Test a New Strategy

https://www.nytimes.com/2026/05/12/technology/chatgpt-lawsuit-wrongful-death.html
1•1vuio0pswjnm7•3m ago•0 comments

The Origins of "Hello, World" [video]

https://www.youtube.com/watch?v=vLer3fRwwxE
1•saikatsg•3m ago•0 comments

AI isn't paying off in the way companies think according to Gartner study

https://fortune.com/2026/05/11/ai-automation-layoffs-gartner-study-roi/
2•1vuio0pswjnm7•4m ago•0 comments

U.S. inflation jumps to 3.8% YoY (7.2% MoM, annualized)

https://www.bls.gov/news.release/cpi.nr0.htm
1•JumpCrisscross•6m ago•0 comments

AI in the rare disease news desert

https://www.thekabukipapers.org/articles/36
2•marstall•7m ago•1 comments

CC-Ledger: Claude Code Cost Tracker (Per-Session and Per-PR)

https://github.com/delta-hq/cc-ledger
2•tsv650•9m ago•0 comments

Parent sues Palo Alto Unified after son is accused of using AI on essay

https://www.paloaltoonline.com/palo-alto-schools/2026/05/11/parent-sues-palo-alto-school-district...
3•ua709•11m ago•2 comments

Carmack on starting a video game company today

https://twitter.com/ID_AA_Carmack/status/2054230690242212133
2•tosh•12m ago•0 comments

Nemotron-Cascade 2: Post-Training LLMs with Cascade RL

https://research.nvidia.com/labs/nemotron/nemotron-cascade-2/
1•daureg•12m ago•1 comments

Trump says US FDA Commissioner Makary is out

https://www.reuters.com/business/healthcare-pharmaceuticals/fda-commissioner-makary-is-resigning-...
1•randycupertino•13m ago•1 comments

Did Ancient Civilizations Have Organized Crime?

https://talesoftimesforgotten.com/2026/03/16/did-ancient-civilizations-have-organized-crime/
2•dbrereton•13m ago•1 comments

The Main Path to Creative AI

https://danielmiessler.com/blog/the-main-path-to-truly-creative-ai
2•pplonski86•14m ago•0 comments

Redraw: 2d Primitives for Web and Native

https://wcandillon.github.io/redraw/
1•memalign•15m ago•0 comments

Modeling the US-Europe Paradox

https://paulkrugman.substack.com/p/modeling-the-us-europe-paradox-very
1•vquemener•17m ago•0 comments

Building a Local AI Workspace Inside VS Code

https://jsdevspace.substack.com/p/building-a-fully-local-ai-workspace
1•javatuts•18m ago•0 comments

In-Kernel Broadcast Optimization: Co-Designing Kernels for RecSys Inference

https://pytorch.org/blog/in-kernel-broadcast-optimization-co-designing-kernels-for-recsys-inference/
1•gmays•19m ago•0 comments

ChatGPT adoption broadened in early 2026

https://openai.com/signals/research/2026q1-update/
2•Brajeshwar•19m ago•0 comments

Company behind GLiNER model released open source model for running LLM guardrail

https://pioneer.ai/blog/gliguard-16x-faster-safety-moderation-with-a-small-language-model
12•neon_share1•19m ago•0 comments

Dependencies Are Someone Else's Attack Surface

https://quodeq.ai/blog/supply-chain-attack-surface/
3•VictorPurMar•20m ago•0 comments

AI Is Starting to Build Better AI (Recursive self-improvement)

https://spectrum.ieee.org/recursive-self-improvement
1•marojejian•22m ago•0 comments

AI overlay that stays invisible to screen recorders

1•unviewable•22m ago•0 comments

Are LLM Useful for Solo Founders

1•sinsudo•23m ago•2 comments

US budget watchdog estimates Golden Dome will cost $1.2T

https://www.reuters.com/business/aerospace-defense/us-budget-watchdog-estimates-golden-dome-will-...
2•OutOfHere•24m ago•0 comments

What Is RTSP Streaming and Why It Is Still Relevant in 2026

https://www.red5.net/blog/4-reasons-rtsp-streaming-is-still-relevant/
1•mondainx•24m ago•0 comments