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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!

Devin Fusion

https://cognition.com/blog/local-fusion
1•samyok•2m ago•0 comments

They do think AI might kill everyone

https://www.seangoedecke.com/they-really-do-think-ai-might-kill-everyone/
1•vladmashk•2m ago•0 comments

Awesome-agentic-payments – A curated list of tools for agentic payments/commerce

https://github.com/bitrefill/awesome-agentic-payments
1•peter_d_sherman•9m ago•0 comments

How to Write an Effective Software Design Document

https://refactoringenglish.com/excerpts/write-an-effective-design-doc/
2•redbell•11m ago•0 comments

Anthropic released a CLI to evaluate skills and plugins

https://code.claude.com/docs/en/plugin-evals
2•edonadei•12m ago•1 comments

QueryBrew: System-Agnostic SQL-to-SQL Query Optimization [pdf]

https://www.vldb.org/pvldb/vol19/p4494-schmidt.pdf
2•matt_d•16m ago•0 comments

Project Blinkenlights

https://blinkenlights.de/en/
7•doener•17m ago•2 comments

Good Alternative to the Cloud

https://github.com/DeploCloud/deplo
2•idradev•17m ago•0 comments

Neom: The Largest Megaproject Collapsed [video]

https://www.youtube.com/watch?v=GbB3vFfiaVU
3•handfuloflight•17m ago•0 comments

Gov Newsom Signs Student-Backed Digital Literacy Bills Alongside Misguided Bans

https://www.eff.org/deeplinks/2026/09/governor-newsom-signs-student-backed-digital-literacy-bills...
4•hn_acker•17m ago•1 comments

Cold TAKE: Amazon's New Encryption Method Still Doesn't Deliver Real Privacy

https://www.eff.org/deeplinks/2026/09/cold-take-amazons-new-encryption-method-still-doesnt-delive...
2•hn_acker•20m ago•0 comments

Dave Ditzel's keynote/AMA on Esperanto's odyssey

https://blog.aifoundry.org/p/dave-ditzels-keynoteama-on-esperantos
2•sxzygz•20m ago•0 comments

What Is Your P(doom)?

https://en.wikipedia.org/wiki/P(doom)
3•consumer451•21m ago•0 comments

The US Government Launched 3 Previously Unreported Investigations of Polymarket

https://www.wired.com/story/polymarket-investigations-iran-biden-google-foia/
1•sbulaev•25m ago•0 comments

An Algorithm for Proving Combinatorial Infeasibility

https://arxiv.org/abs/0801.3788
2•E-Reverance•27m ago•0 comments

wolfSSL Announces wolfPSA

https://github.com/wolfSSL/wolfPSA
2•aidangarske•27m ago•1 comments

Michigan coal plant [J.H. Campbell] set to close was illegally kept open

https://www.freep.com/story/news/environment/2026/09/11/consumers-energy-campbell-power-plant-coa...
2•toomuchtodo•29m ago•1 comments

Meta Sets Up Super IC Teams

https://news.theuncommonexecutive.com/p/how-to-get-the-most-out-of-your-super
2•fagnerbrack•32m ago•0 comments

What Is an Agent Multiplexer?

https://clor.com/blog/what-is-an-agent-multiplexer
2•jacobgold•32m ago•0 comments

NASA: The National Artificial Stupidity Association (Omni 1985)

https://ia800903.us.archive.org/BookReader/BookReaderImages.php?zip=/5/items/omni-archive/OMNI_19...
2•mpweiher•38m ago•1 comments

Show HN: Claude Read Aloud – Hear Claude's Replies Instead of Reading

https://github.com/MichaelPGifford/claude-read-aloud
2•michaelgifford•42m ago•0 comments

Show HN: Loop Pedal for Video

https://github.com/haxybaxy/video-pedal
2•haxybaxy•42m ago•0 comments

How AI Is Changing Audio Restoration in 2026

https://audioconverterai.io/blog/ai-audio-restoration
2•peter_d_sherman•43m ago•1 comments

Show HN: Spanda – Sub-microsecond LLM epistemic uncertainty in Rust

https://github.com/Adarshent/Spnda
12•Bhupennayak•43m ago•1 comments

Show HN: ResolveHQ – A Helpdesk Built on Cloudflare Workers, D1, R2 and Queues

https://github.com/mirza-rizvi/ResolveHQ
4•mirza_rizvi•44m ago•0 comments

FreelanceFend – AI web app and extension to screen freelance clients

https://www.freelancefend.com/
2•RezonReiTy•44m ago•0 comments

Rage Against the Machine

https://milelion.com/2026/09/11/rage-against-the-machine/
2•motionlessveloc•44m ago•0 comments

Pixel Wealth

https://consti.de/1-pixel-wealth/
3•con•45m ago•0 comments

The moon may have formed in just 5 hours, new simulations suggest

https://www.livescience.com/space/the-moon/the-moon-may-have-formed-in-just-5-hours-new-simulatio...
5•bookofjoe•49m ago•1 comments

ASCII City Update 3: Maps and Exploration Update [video]

https://www.youtube.com/watch?v=SNJyKjfB8fY
2•duck•49m ago•0 comments