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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!

Language Models Act on Hidden Valence

https://arxiv.org/abs/2609.35591
1•sbulaev•1m ago•0 comments

Show HN: Rsync.ai – self-hosted CDC and ETL/ELT, source-available (ELv2)

https://github.com/rsync-ai/rsync
1•rahulvishnoi88•1m ago•0 comments

Meta's new AI agent built lists of people in vulnerable groups on request

https://hntrbrk.com/breaking-news/muse-doxxing
2•iamacyborg•1m ago•0 comments

When single AI agents become a swarm

https://www.gradientinstitute.org/research-publications/when-single-ai-agents-become-a-swarm
1•geoffb•2m ago•0 comments

How to host and improve the token speed of an LLM

https://medium.com/@abhijithneilabraham/learning-inference-how-to-host-and-improve-the-token-spee...
1•abhijithneil•5m ago•0 comments

Beta version of Campfire rewritten in Rust

https://twitter.com/dhh/status/2104633108092092880
2•tosh•9m ago•1 comments

Post Capitalism

https://geohot.github.io//blog/jekyll/update/2026/09/29/post-capitalism.html
2•smilelamp•14m ago•0 comments

Startup Nights 2026 is comming up on 5-6 Nov. in Switzerland

https://www.startup-nights.ch/event/
1•sschueller•19m ago•0 comments

Anthropic leaders to control company via 'Founder LLC'

https://www.reuters.com/legal/transactional/anthropic-leaders-control-ai-lab-via-founder-llc-prom...
1•JumpCrisscross•21m ago•0 comments

Show HN: Core Metric Suite – 12 free, privacy-first web calculators

https://www.coremetricsuite.com/
1•wayfurer12•23m ago•0 comments

The booming business of insuring against US gun violence

https://www.ft.com/content/5ad7c42c-b95d-47b8-8dfd-896c1deda1df
2•JumpCrisscross•27m ago•0 comments

The feedback loop of mathematics research

https://blog.danromik.com/the-feedback-loop-of-mathematics-research
1•robinhouston•29m ago•0 comments

Show HN: Musebook – A Social Network for Muses

https://themusebook.co/
1•JoAz111•30m ago•0 comments

I build an B2C social media app and reached 28 payed subscriptions

https://mindfuse.io
1•jbonnevits•31m ago•0 comments

Obliteratus Removes LLM Censorship

https://huggingface.co/spaces/pliny-the-prompter/obliteratus
2•soltanov•32m ago•0 comments

Currency converter app – ECB rates (works offline as PWA)

https://riowallet.netlify.app/
1•levario•35m ago•0 comments

Timeline of Emergent Capabilities

https://www.gleech.org/emergence
2•6bitquant•37m ago•0 comments

OpenAI scraps release of new model over safety concerns

https://www.theguardian.com/technology/2026/sep/28/openai-new-model-astra-release-scrapped
1•skor•37m ago•0 comments

ContextMemory – Markdown memory for your llama.cpp/vLLM server

https://github.com/Kortexio/ContextMemory
1•vitorcastro78•43m ago•0 comments

Live video from a moving car, with 30x fewer breaks

https://nanoping.com/benchmarks/nanoping-vs-srt
2•mortenvp•44m ago•2 comments

Show HN: GitHub Action for zero-downtime Docker Compose deploys, no Kubernetes

https://github.com/mtizima/docker-rollout-action
1•mtizima•45m ago•0 comments

HeyRepli –AI Social Concierge for SMBs

https://heyrepli.com/
2•kaco•50m ago•0 comments

Stepper firmware for the Uno that stops the motor when your program stops

https://github.com/hendrikusjohannes92-cell/bombyx-bench-kit
1•Rovshanjaniev•53m ago•0 comments

Hyperfront end's official launch on devhunt is here

https://devhunt.org/tool/hyperfrontend
1•andrew_redican•53m ago•0 comments

NSA, military cyber forces will guard US election systems during midterms

https://apnews.com/article/nsa-hegseth-trump-midterms-election-security-2bfc1417d397db5fda4ad672c...
1•geox•55m ago•1 comments

Denial of Spend: New category of resource exhaustion attacks

https://paultendo.github.io/posts/denial-of-spend-gpt-6-claude-fable/
1•nikanj•59m ago•0 comments

OpenAI: Tomorrow we are re-opening the Pro $200 subscription

https://twitter.com/thsottiaux/status/2104823812042940713
29•tosh•1h ago•20 comments

Study: A lack of professional AI guidelines leads to feelings of "AI shame"

https://www.niemanlab.org/2026/09/a-lack-of-professional-ai-guidelines-leads-to-feelings-of-ai-sh...
1•giuliomagnifico•1h ago•0 comments

Show HN: Prompt Anonymization and Deanonymization

https://dataanonymiser.com
1•Lindizz•1h ago•0 comments

US Forces Exit Iraq

https://www.reuters.com/world/middle-east/us-forces-exit-iraq-after-two-decades-leaving-opening-i...
48•cod1r•1h ago•55 comments