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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!

Ask HN: Programming Codex/Claude to code for a duration

1•senor_digimon•51s ago•0 comments

Toronto hospital to expand permanent housing program that reduces ER visits

https://www.cbc.ca/news/canada/toronto/ont-dunn-house-9.7365728
1•BiraIgnacio•1m ago•0 comments

AI decompiling and combining Games: The Skate 3 in MW2 Mod is Unbelievable [video]

https://www.youtube.com/watch?v=I6BkcPdKQ8U
1•reimertz•2m ago•0 comments

Forget 'superintelligence': error-prone AI nearly sparked world war three

https://www.theguardian.com/commentisfree/2026/oct/01/forget-superintelligence-error-prone-ai-nea...
1•pseudolus•3m ago•0 comments

Praxis-1

https://runway.com/research/introducing-praxis-1
1•gmays•4m ago•0 comments

Bevy - a refreshingly simple data-driven game engine built in Rust

https://bevy.org/
1•reimertz•7m ago•0 comments

Our AI Midwife

https://www.astralcodexten.com/p/our-ai-midwife
1•semiquaver•8m ago•0 comments

Show HN: Sovereign-NB: Sub-microsecond bare-metal neural engine in Rust (UEFI)

https://github.com/msndsn123a/Sovereign-NB
1•msndsn123a•13m ago•0 comments

KernelBench: Can LLMs Write GPU Kernels? – Benchmark and Toolkit, Torch –> CUDA

https://github.com/ScalingIntelligence/KernelBench
1•peter_d_sherman•15m ago•0 comments

Martian Chaos Terrain

https://en.wikipedia.org/wiki/Martian_chaos_terrain
2•tiagod•18m ago•0 comments

Show HN: I made a bullet heaven game no one seems showing intresting

https://store.steampowered.com/app/5170580/Blend_Hunter_Smoothie_Bullet_Heaven/
1•sacravenger•18m ago•0 comments

Rate limits for private vulnerability reports

https://github.blog/changelog/2026-10-01-rate-limits-for-private-vulnerability-reports/
1•tech234a•20m ago•1 comments

Show HN: Agent team runtime with concrete lifecycle management

https://github.com/ringlochid/oh-my-subagents
1•ringlochid•21m ago•0 comments

Agentic coding's effect on Hacker News hiring threads

https://bsky.app/profile/largbae.bsky.social/post/3mwtqukfbcs23
1•largbae•23m ago•1 comments

HarnessTax: How Much Does the Harness Matter for Coding Agents?

https://arena.ai/blog/coding-agents-harness-tax
1•luispa•25m ago•0 comments

Show HN: QLCodePreview, syntax highlighting in Finder's Quick Look

https://konstruukt.com/projects/qlcodepreview/
1•realityloop•25m ago•1 comments

AI Benchmark Scores: Why 82% is actually 57%

https://lessuncertain.substack.com/p/how-to-read-and-haircut-ai-benchmark
1•luhe1900•26m ago•0 comments

Vaping for Crypto

https://www.nejm.org/doi/full/10.1056/NEJMp2606580?query=featured_home
1•maxall4•26m ago•0 comments

Reddit is ending RSS support on November 13

https://www.reddit.com/r/modnews/comments/1wubgvt/continuing_our_infrastructure_updates_whats/
7•soheilpro•27m ago•0 comments

100% free coding agent funded by ads

https://freebuff.com
1•darweenist•32m ago•0 comments

Merchants, Slaves, Peculium: The History of LLCs

https://www.kjmlaw.com/merchants-slaves-peculium-history-llcs/
1•gradus_ad•34m ago•0 comments

Intercommunalism

https://en.wikipedia.org/wiki/Intercommunalism
1•mooreds•34m ago•0 comments

Open-source, community-driven infrastructure for decentralized social media

https://github.com/blacksky-algorithms
2•mooreds•35m ago•0 comments

OVOS and Mycroft: A Fork That Wasn't Meant to Be

https://blog.openvoiceos.org
1•giancarlostoro•35m ago•0 comments

All Protection, All Month

https://mailchi.mp/vennfactory/oct-a-productivity
1•mooreds•35m ago•0 comments

Senate holds a hearing on AI [video]

https://www.youtube.com/watch?v=QYsfNRCj8H8
1•smalltorch•36m ago•0 comments

The Siren Call of Silicon Leviathan: Reflections on Blowup and Aufklärungsdämmer

https://arxiv.org/abs/2609.28591
1•hkhn•37m ago•0 comments

The essay on the Navier-Stokes story that everyone should read

https://siliconreckoner.substack.com/p/the-essay-on-the-navier-stokes-story
1•hkhn•39m ago•0 comments

Codex stopped working after latest update on macOS

https://twitter.com/theadriannoel/status/2105821027108343926
2•absqueued•41m ago•1 comments

Coarse-Grained Reconfigurable Array (CGRA)

https://en.wikipedia.org/wiki/Coarse-grained_reconfigurable_array
1•peter_d_sherman•45m ago•1 comments