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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•10mo 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: I built a visual ML trainer that exports to standalone PyTorch code

https://github.com/zaina-ml/ml_forge
1•zaina-ml•40s ago•0 comments

Multimodal file search and sharing for AI agents

https://claw3drive.com/
1•mnmatin•1m ago•1 comments

Italy delays coal phase-out by over a decade

https://beyondfossilfuels.org/2026/03/30/italy-delays-coal-phase-out-to-2038/
1•thm•3m ago•0 comments

NocoBase sandbox escape to root RCE via console object prototype chain

https://anonhaven.com/en/news/ocobase-sandbox-escape-rce-cve-2026-34156/
1•anonhaven•4m ago•0 comments

Raspberry Pi profit surges as AI boom lifts demand

https://www.ft.com/content/5c167591-80bb-4290-ae66-7d04112cbd1c
3•constantinum•6m ago•0 comments

Building More Resilient Local-First Software with ATProto

https://jakelazaroff.com/words/building-more-resilient-local-first-software-with-atproto/
1•kurinikku•6m ago•0 comments

Estimating ISS speed from images using OpenCV (~2–3% error)

https://github.com/BabbaWaagen/AstroPi
1•BabbaWaagen•7m ago•0 comments

Krazam – Offsite Karaoke [video]

https://www.youtube.com/watch?v=s-x_bXO7nzA
1•tart-lemonade•8m ago•0 comments

Strengthening GitLab.com security: Mandatory multi-factor authentication

https://about.gitlab.com/blog/strengthening-gitlab-com-security-mandatory-multi-factor-authentica...
1•tcfhgj•8m ago•0 comments

Nesion – a KV-Cache eviction engine

https://nesion.net
1•CarlosCosta_•9m ago•0 comments

Conductor raises $22M Series A

https://www.conductor.build/blog/series-a
1•Charlieholtz•9m ago•0 comments

Spacecraft Heat Shields Could Violently "Burst" in Alien Atmospheres

https://www.universetoday.com/articles/spacecraft-heat-shields-could-violently-burst-when-plungin...
1•gostsamo•10m ago•0 comments

Show HN: SkillForge – Turn code and docs into instructions AI agents can follow

https://github.com/armelhbobdad/bmad-module-skill-forge
1•tigoo•11m ago•0 comments

Fine Tuning Services Benchmark

https://vintagedata.org/blog/posts/fine-tuning-as-service
2•ydetrois•12m ago•1 comments

AI native Slack/teams: Turning conversations to context

https://venturebeat.com/data/imagine-if-your-teams-or-slack-messages-automatically-turned-into-se...
1•tango12•12m ago•0 comments

Show HN: I Made an Android App to Bridge Google Health Connect to Webhook

https://github.com/mcnaveen/health-connect-webhook/
1•mcnx097•13m ago•1 comments

A Couple Million Lines of Haskell: Production Engineering at Mercury

https://blog.haskell.org/a-couple-million-lines-of-haskell/
1•constantinum•13m ago•0 comments

Using LLMs to amplify human labeling and improve Dash search relevance

https://dropbox.tech/machine-learning/llm-human-labeling-improving-search-relevance-dropbox-dash
1•softwaredoug•14m ago•0 comments

Claude Code Internals: An AI-Assisted Analysis of the Leaked Source

https://victorantos.com/posts/i-pointed-claude-at-its-own-leaked-source-heres-what-it-found/
1•victorbuilds•14m ago•0 comments

Show HN: Margo – Find the font your brain reads fastest

https://margo.fyi/
1•theseidel•15m ago•0 comments

Global Ban on Digital Duties Expires After Stalled Talks at WTO Meeting

https://www.nytimes.com/2026/03/31/business/economy/digital-tax-world-trade-organization.html
1•donohoe•16m ago•0 comments

Show HN: TraceHouse – ClickHouse Monitoring

https://dmkskd.github.io/tracehouse/
1•xxdd2ea•16m ago•0 comments

Some of the most popular graduate degrees don't pay off financially, study finds

https://www.washingtonpost.com/education/2026/03/31/graduate-degree-earnings-study/
2•dberhane•17m ago•1 comments

Show HN: Agent Wellbeing Kit – boundary protection for humans running AI agents

https://github.com/joozio/agent-wellbeing-kit
1•joozio•17m ago•0 comments

The Download: AI health tools and The Pentagon's Anthropic culture war

https://www.technologyreview.com/2026/03/31/1134934/the-download-testing-ai-health-tools-pentagon...
1•joozio•17m ago•0 comments

Ask HN: How do you handle strict rate-limiting on stateless edge workers?

1•rwasimsk•17m ago•1 comments

Explore data across 903 variables about sex, kink, personality and relationships

https://bigkinksurvey.com
1•embedding-shape•17m ago•0 comments

Devil in the grooves: The case against forensic firearms analysis (2023)

https://radleybalko.substack.com/p/devil-in-the-grooves-the-case-against
1•hn_acker•18m ago•0 comments

'Euro-Office': OnlyOffice accuses of license violations

https://www.heise.de/en/news/Euro-Office-OnlyOffice-accuses-of-license-violations-11241334.html
2•76rp•18m ago•0 comments

Autodebug: Telemetry-Driven Inference Optimization Loop

https://graphsignal.com/blog/autodebug-telemetry-driven-inference-optimization-loop/
1•npgraph•19m ago•0 comments