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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•10mo 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!

Let Claude use your computer from the CLI

https://code.claude.com/docs/en/computer-use
1•taspeotis•5m ago•0 comments

Using complex polynomials to approximate arbitrary continuous functions (2025)

https://www.lesswrong.com/posts/9gNewBQCF47FyjYfw/using-complex-polynomials-to-approximate-arbitrary
1•measurablefunc•8m ago•0 comments

Explore Benjamin Franklin's Science on NotebookLM

https://blog.google/company-news/outreach-and-initiatives/arts-culture/benjamin-franklin-notebooklm/
2•y1n0•9m ago•0 comments

From static findings to runtime exploits: testing 6 popular MCP servers

https://agentseal.org/blog
1•Resham_Joshi•10m ago•0 comments

Retraining my terrible typing habits

https://technicallychallenged.substack.com/p/retraining-my-terrible-typing-habits
1•koinedad•14m ago•0 comments

Show HN: Gives your AI agents a shared, searchable, persistent memory – locally

https://github.com/vbfs/agent-memory-store/
1•vbfs•16m ago•0 comments

Research game measuring how humans detect AI-generated phishing emails

https://github.com/scottalt/ai-email-threat-research
1•serious_angel•16m ago•1 comments

Incident March 30th, 2026 – Accidental CDN Caching

https://blog.railway.com/p/incident-report-march-30-2026-accidental-cdn-caching
4•cebert•17m ago•0 comments

Adobe Illustrator can now use AI to rotate 2D vectors in 3D space

https://9to5mac.com/2026/03/30/adobe-illustrator-now-lets-you-rotate-2d-vectors-in-3d-space/
1•bundie•19m ago•0 comments

Universal Claude.md – cut Claude output tokens by 63%

https://github.com/drona23/claude-token-efficient
9•killme2008•22m ago•1 comments

Parsing a Chinese Poem as a Formal System That Runs

https://jimiwen.substack.com/p/si-wu-zi-4d7
1•jimiwen•25m ago•0 comments

Don't overthink electric car charging (we should be doing it differently)

https://www.youtube.com/watch?v=5NG4hycq8n0
1•em-bee•25m ago•0 comments

Six cloned horses help rider win prestigious polo match (2016)

https://www.science.org/content/article/six-cloned-horses-help-rider-win-prestigious-polo-match
1•pinkmuffinere•26m ago•1 comments

What I Talk About When I Talk About Grading

https://unintendedconsequenc.es/what-i-talk-about-when-i-talk-about-grading/
1•paulorlando•30m ago•0 comments

Maybe Finance Asset Sale

https://maybefinance.notion.site/asset-sale
1•raybb•33m ago•0 comments

Small ways the App Store could be improved for developers

https://lapcatsoftware.com/articles/2026/3/13.html
2•walterbell•34m ago•0 comments

Show HN: Cut your tail latencies by 74% with zero config

https://pkg.go.dev/github.com/bhope/hedge
2•soniccontroller•34m ago•0 comments

Rust's next-generation trait solver

https://lwn.net/SubscriberLink/1063124/81483612b1c8a493/
1•dabinat•36m ago•0 comments

Ask HN: How do you maintain technical deep-focus in a world of Slack/Teams

1•lion__93332•37m ago•0 comments

A Man and the Elevator

https://joseantunes.tech/life/2026/03/22/the-elevator.html
1•zemike•39m ago•1 comments

Whispr Flow – Vision Flow

https://github.com/tanayvin1216/VisionFlow
1•tanay_vin•40m ago•1 comments

GTabs – AI tab organizer for Chrome that works with any LLM

https://github.com/vaddisrinivas/gtabs
1•srinivasvaddi•41m ago•0 comments

Yes, you need a Mac Mini

https://hyperengineering.bottlenecklabs.com/p/yes-you-actually-need-a-mac-mini
2•Areibman•41m ago•0 comments

Ask HN: Is anyone still resisting the slop onslaught?

3•0xDEFACED•41m ago•2 comments

The AI Shift: Will software engineers survive agentic AI?

https://www.ft.com/content/7325e967-5f4e-40b1-af3f-7d2351781843
2•mooreds•45m ago•0 comments

Think tank collaborate and earn bata testing

https://solve-hive-pro.base44.app
1•wesley-Alan•47m ago•0 comments

Ask HN: After three years of open source software, I can't stand it

https://github.com/drl990114/MarkFlowy
3•drl5•53m ago•0 comments

Adding custom webhooks to my Samsung smart ring

https://github.com/TheVellichor/SamsungOpenRing
1•_vellichor•1h ago•1 comments

Proposal for adding a useful pipe operator to JavaScript

https://github.com/tc39/proposal-pipeline-operator
1•jcbhmr•1h ago•0 comments

Review: The Wireless Cookbook

https://www.helpnetsecurity.com/2025/10/28/review-the-wireless-cookbook/
1•teleforce•1h ago•0 comments