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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!

Ponytail vs. a good AGENTS.md: What we found on our real codebase

https://docspring.com/blog/posts/ponytail-vs-agents-md/
1•nathan_f77•2m ago•0 comments

Introducing OWE-Bench for Long-Horizon Engineering Projects

https://www.mercor.com/blog/introducing-owe-bench/
1•matt_d•7m ago•0 comments

Show HN: Real-time inventory of natural stone slabs in US

https://slabby.org/
1•dhruvkar•8m ago•0 comments

Qwen3.8 re-educated with a more Western worldview

https://www.theregister.com/ai-and-ml/2026/11/13/alibabas-qwen38-re-educated-with-a-more-western-...
1•NordStreamYacht•12m ago•0 comments

They Were the Indispensable CEOs–Until They Weren't

https://www.wsj.com/business/they-were-the-indispensable-ceosuntil-they-werent-1bb8a52c
1•marc__1•13m ago•0 comments

WMP Goodies

https://sites.google.com/view/wmpgoodies/home
1•themaxdavitt•14m ago•0 comments

North Korean hackers used fake video calls in $400M crypto hack, says FBI

https://www.bbc.com/news/articles/cqdj1ellpd70o
2•1659447091•17m ago•0 comments

Jensen Huang expected to testify before Congress

https://www.theguardian.com/technology/live/2026/nov/13/nvidia-jensen-huang-to-testify-before-con...
5•byte_0•20m ago•0 comments

Defunct Company Data Partnership

https://company.micro1.ai/register/?referralCode=340999d4-30b9-44d7-82c0-c6fda55a3d3e&utm_source=...
2•dkggwl1990•21m ago•0 comments

AI Security Wiki

https://nachi065.github.io/AI-Security-Wiki/
3•totetsu•21m ago•1 comments

Don't Underestimate Swift: Learnings Building Back Ends with Hummingbird/Vapor

https://wearecommunity.io/communities/mobilepeople/articles/8881
1•frizlab•22m ago•1 comments

Show HN: I built a Rick and Morty explainer video generator

https://usediorama.com/rick-and-morty
3•dixitbavu•23m ago•3 comments

Octen-WebGR, a 4B model that memorized 200M URLs (open weights, live demo)

https://huggingface.co/Octen/Octen-WebGR-4B
3•kunka_octen•24m ago•0 comments

FDA Approves First Factor Xla Inhibitor to Help Prevent Stroke

https://www.fda.gov/news-events/press-announcements/fda-approves-first-factor-xla-inhibitor-help-...
3•geox•28m ago•0 comments

Feel the AGI [video]

https://www.youtube.com/watch?v=YMFjMYOkpgM
1•HowyHugh•29m ago•0 comments

The Land and the Landfill

https://urbanomnibus.net/2026/11/the-land-and-the-landfill/
2•wawayanda•30m ago•0 comments

Making nuclear fusion in your kitchen

https://hudzah.substack.com/p/making-nuclear-fusion-in-your-kitchen
2•niallsmart•31m ago•0 comments

Read the Aubrey-Maturin series. Before it's too late

https://mapwriting.substack.com/p/read-the-aubrey-maturin-series-before
8•chandlerh•31m ago•2 comments

Tailcat for Minecraft

https://github.com/tailscale/tailcat-for-minecraft
2•LelouBil•32m ago•0 comments

The Glued Cup

https://idle.news/blog/the-glued-cup/
1•colinprince•33m ago•0 comments

When the Observer Stole the Universe

https://pansophics.substack.com/p/when-the-observer-stole-the-universe
1•saadchakra•43m ago•0 comments

Mac-assed Mac app (2020)

https://daringfireball.net/linked/2020/03/20/mac-assed-mac-apps
3•guessmyname•43m ago•0 comments

Mythos got Claude running on AMD chips in three days, a job that took months

https://madrobot.blog/2026/11/11/anthropic-mythos-claude-amd-chips-three-days/
2•mroche•46m ago•1 comments

A real-time database of Indian state GDP

https://itihasdata.org/
1•hunglee2•47m ago•0 comments

How are database migrations handled for FusionAuth Cloud instances?

https://fusionauth.io/community/forum/topic/3345/how-are-database-migrations-handled-for-fusionau...
2•mooreds•48m ago•0 comments

State of the tech job market: late 2026

https://www.lennysnewsletter.com/p/state-of-the-tech-job-market-late
3•mooreds•49m ago•0 comments

Microsoft outage drags on for hours, disrupting Outlook, Teams for thousands

https://www.reuters.com/technology/microsoft-365-outlook-down-thousands-us-users-downdetector-sho...
3•JumpCrisscross•50m ago•1 comments

Brandrail – make Claude Code and Cursor follow your design system

https://github.com/brandrail-app/brandrail
1•thiago_baptiste•52m ago•0 comments

Claude for Manufacturing

https://claude.com/resources/articles/claude-for-manufacturing
1•jp_rider•54m ago•0 comments

Don't argue with me. $100k is fair, and you know it

https://folklore.org/Switcher.html
11•sammatilda•55m ago•1 comments