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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!

Labrinth Producing on Livestream [video]

https://www.youtube.com/watch?v=UUvGJ5WM-gA
1•evek•49s ago•0 comments

Apple cuts employee AI budgets in cost-control push

https://www.reuters.com/business/retail-consumer/apple-cuts-employee-ai-budgets-cost-control-push...
1•nsagent•58s ago•0 comments

Show HN: Cosyra – Steer coding agents on your machines from your phone

https://cosyra.com/
1•adamisnotroman•59s ago•0 comments

Apple's own endpoint sensor, without an external agent

https://www.handsomeboyscomputer.club/log/agentless-macos-1/
1•kravmaga999•1m ago•0 comments

Changing a patient social background changed LLM care recommendations

https://medwrite.ai/news/inside-the-dublink-llm-athon
1•Budran•1m ago•0 comments

Show HN: Units to Draw – a math-only syringe units calculator

https://unitstodraw.com
1•unitstodraw•3m ago•0 comments

A LinkedIn side panel that keeps the follow-up date on the lead

https://chromewebstore.google.com/detail/leadztrak-lead-capture-cr/ifeocmkmcflkceenbdlidikmhebopibk
1•syszone•4m ago•0 comments

Claude Code Phenomenon in ChipDesign

https://blog.verifai.ai/the-claude-code-phenomenon-tempering-optimism-with-historical-perspective/
1•sandeepsr•4m ago•0 comments

Micron Computers' Rise and Fall

https://dfarq.homeip.net/micron-computers-rise-and-fall/
1•giuliomagnifico•5m ago•0 comments

Porting ECS to Go

https://tomasvotruba.com/blog/porting-ecs-to-go
1•theanonymousone•5m ago•0 comments

A personal CRM in plain Markdown files

https://www.ssp.sh/brain/personal-crm/
1•zazuke•6m ago•0 comments

Chatterbug Has Closed

https://www.chatterbug.com/
1•axelhj•6m ago•0 comments

Why T2T?

https://programmingsimplicity.substack.com/p/why-t2t
1•surprisetalk•8m ago•0 comments

Vivaldi 8.3 for Desktop: make bad ads sad

https://vivaldi.com/blog/vivaldi-on-desktop-8-3/
2•speckx•9m ago•0 comments

Portable Liveables Interchange Standard

https://github.com/funnyfiction/polis
1•genesem•10m ago•0 comments

The Hanoi Lake Where Kids Hustle American Tourists for English Lessons

https://www.wsj.com/lifestyle/travel/the-hanoi-lake-where-kids-hustle-american-tourists-for-engli...
1•impish9208•12m ago•1 comments

Notes on San Marino

https://mattlakeman.org/2026/11/05/notes-on-san-marino/
1•valkrieco•13m ago•0 comments

Do not ask "Is A a B?": Inheritance and the Is-A Trap

https://denkstein.github.io/2026/11/05/do-not-ask-is-a-a-b/
1•theanonymousone•14m ago•0 comments

Vibe Profiling – Let the agent do the profiling, as we clearly stopped doing it

https://cybereason-public.github.io/owLSM/architecture/agentic-profiling-loop/
1•SilverPlate3•15m ago•1 comments

Thundermail Beta Priority Access

https://explore.thunderbird.net/desktop-thundermail-waitlist-rel-1048
2•akyuu•19m ago•0 comments

Turning a Cloud Serial Console into a SOCKS5 Proxy

https://exploiting.systems/posts/2026-11-04-turning-a-cloud-serial-console-into-a-socks5-proxy
1•ropbear•20m ago•0 comments

Computer use is GA in Gemini API

https://aistudio.google.com/docs/computer-use
1•devhouse•20m ago•0 comments

Tell HN: Protonmail No Longer Allows Contact Management in Android

3•eth0up•23m ago•0 comments

From Linux to Wikipedia: How Volunteers Build the Internet

https://thereader.mitpress.mit.edu/from-linux-to-wikipedia-how-volunteers-build-the-internet/
1•sohkamyung•23m ago•0 comments

The Company that Broke Canada [video]

https://www.youtube.com/watch?v=I6xwMIUPHss
1•Imustaskforhelp•23m ago•0 comments

Leak the exact location of any video using sound of nearby airplanes

https://twitter.com/0x45o/status/2117332304880169152
2•halb•24m ago•0 comments

Stop the Monster: Young voices sing out against Devon data centre plan

https://www.northdevongazette.co.uk/news/stop-the-monster-protest-song-against-devon-data-centre-...
1•jefc1111•24m ago•0 comments

Full-stack verification is the new trend

https://wiki.alcidesfonseca.com/blog/full-stack-verification-is-the-new-trend/
1•alcidesfonseca•25m ago•0 comments

Author Susanna Clarke: in defence of fantasy fiction

https://observer.co.uk/culture/books/article/susanna-clarke-in-defence-of-fantasy-fiction
1•surprisetalk•28m ago•0 comments

Show HN: Ergon - build AI agents in code or on a canvas that generates Python

https://github.com/shipitamit/ergon
1•mavster26•29m ago•0 comments