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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!

Show HN: One-click fork of "Everything Claude Code" onto an isolated microVM

https://www.jurniti.com/templates/ecc
1•shving90•1m ago•0 comments

Trillions of dollars spent just to work on customer services?

1•YihaoZhang•2m ago•0 comments

Capitol Alpha Machine – interactive viz of congressional stock trades

https://capitolalpha.app/
1•sylvainbe•6m ago•0 comments

GCP IAM Authorization Bypass

https://olearysec.com/research/config-connector-authorization-bypass/
3•sanbor•6m ago•0 comments

Show HN: Avera – a deterministic check that proves no regression was introduced

https://github.com/tc7kxsszs5-cloud/avera
1•kiku79•7m ago•0 comments

Build yor form back end infrastrture under 30sec

1•unaisshemim•8m ago•0 comments

Elysia Marginata

https://en.wikipedia.org/wiki/Elysia_marginata
1•ZeljkoS•10m ago•1 comments

RemotePower – self-hosted fleet monitoring with built-in vulnerability scanning

https://github.com/tyxak/remotepower
1•tyxak•15m ago•0 comments

Show HN: I was drowning in browser tabs, so I built this

https://microsoftedge.microsoft.com/addons/detail/gopeek/ffaeanmhghmohbponokefmbhfkkomnmk
3•formit34•15m ago•1 comments

Icon.museum – A curated gallery of app icon design

https://icon.museum
1•akashwadhwani35•16m ago•0 comments

Impossible Challenge

https://itch.io/jam/impossible-challenge
1•alisio85•16m ago•0 comments

Terminal-Bench Challenges: long-horizon, token-intensive, single-task benchmarks

https://www.tbench.ai/news/terminal-bench-challenges
1•matt_d•16m ago•0 comments

High-performance code intelligence MCP server

https://github.com/DeusData/codebase-memory-mcp
1•giamma•17m ago•1 comments

Show HN: Redteam:If you are using more than 2 coding agents

https://github.com/AscendyProject/redteam
1•rkdgh19•21m ago•0 comments

Usbliter8 an A12/A13 SecureROM Exploit

https://ps.tc/pages/blog-usbliter8.html
2•Cider9986•23m ago•0 comments

Ukrainian drone makers target Asia as Taiwan tensions spur demand

https://www.reuters.com/world/china/ukrainian-drone-makers-target-asia-taiwan-tensions-spur-deman...
1•JumpCrisscross•24m ago•0 comments

HN with pics – a visual hcker.news reader

https://hn.is-ai-good-yet.com/
1•ilyaizen•28m ago•0 comments

Dana Scott: Lambda Calculus, Forcing and the Foundations of Math: #14 aboutlogic [video]

https://www.youtube.com/watch?v=opLbbZ-_AWE
1•matt_d•31m ago•0 comments

Prodigy: AI Employees

https://docs.google.com/presentation/d/1aldEHGR_1Hv_F0UlTuQIL8mXhsw5s5VzuuPcgKV5czY/edit?usp=sharing
2•samayashar•34m ago•2 comments

We built a status page service on Cloudflare

https://ampliflare.com/blog/status-page-cloudflare-architecture/
1•powerpurple•37m ago•1 comments

I tested Gemma4 12B on my 8GB GPU, now I don't want to go back to smaller models

https://www.xda-developers.com/tested-google-gemma-4-12b-on-8gb-gpu-and-dont-want-to-go-back-to-s...
1•theanonymousone•38m ago•0 comments

Make-work and Sub-subsistence work

https://wilsoniumite.com/2026/06/19/make-work-and-sub-subsistence-work/
1•Wilsoniumite•38m ago•0 comments

'We created a monster': companies rein in AI usage as costs strain budgets

https://www.ft.com/content/1d37cc08-e0aa-45a4-a45d-4ad282529314
2•JumpCrisscross•39m ago•0 comments

One Model Won't Save You: How We Built Our AI Stack

https://www.xelerate.tech/one-model-wont-save-you/
1•pedrocha•40m ago•0 comments

Mantyx – Batteries Included Managed Agent Runtime

https://mantyx.io/
1•mantyx•41m ago•0 comments

Show HN: Write SaaS apps where users control where their data is stored

https://github.com/wolfoo2931/linkedrecords/
1•WolfOliver•46m ago•0 comments

Disney+ Is Down

https://mashable.com/tech/disney-plus-down-outage
2•01-_-•48m ago•0 comments

I Replaced My Custom Next.js Portfolio with a Markdown First Site Engine

https://muhammadhaseeb.me/blog/why-koji
1•iamhaseeb•48m ago•0 comments

Contributor Poker and Zig's AI Ban

https://kristoff.it/blog/contributor-poker-and-ai/
2•birdculture•53m ago•0 comments

It looks like Elon Musk has a Giganormous tax bill coming

https://bsky.app/profile/bgrahamdisciple.bsky.social/post/3mokv2qdksc2m
2•doener•57m ago•2 comments