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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: DonnyClaude – a verified workflow engine for Claude Code

https://github.com/d0nmega/donnyclaude
1•d0nmega•27s ago•0 comments

When you fly, you fly with ICE

https://papersplease.org/wp/2026/04/08/when-you-fly-you-fly-with-ice/
1•greyface-•51s ago•0 comments

Show HN: Open Science, open-source alternative to Claude Science

https://github.com/ai4s-research/open-science
1•aiboost•3m ago•0 comments

Show HN: I made the Chrome Dino Game editable by your AI prompts

https://vibedino.com
1•johnnyapple•5m ago•0 comments

Twain Town, USA

https://theamericanscholar.org/twain-town-u-s-a/
1•prismatic•11m ago•0 comments

Study: AI Writing Strips Mystery and Complexity from Stories

https://neurosciencenews.com/ai-writing-mystery-complexity-creativity-30978/
1•giuliomagnifico•12m ago•0 comments

ClaimMate AI – We'd Love Your Feedback

https://claimmateai.pro/
1•hfhfdhf•13m ago•1 comments

Show HN: CertLeaf helps event organizers issue verifiable E-certificates

https://certleaf.com/
1•vachanmn123•14m ago•0 comments

AI Workflows Need Topological Sort

https://arpitbhayani.me/blogs/ai-topological-sort/
1•aishwarydongre•16m ago•0 comments

Meta's AI Storage Blueprint at Scale

https://engineering.fb.com/2026/07/01/data-infrastructure/metas-ai-storage-blueprint-at-scale/
1•MasterScrat•19m ago•0 comments

Show HN: Block Blast Solver – Android app for when you get stuck

https://onlineblockblastsolver.com/block-blast-apk/
1•huzaifasinan•19m ago•0 comments

SkillOpt: Executive Strategy for Self-Evolving Agent Skills

https://github.com/microsoft/SkillOpt
1•cheekyant•21m ago•0 comments

HTTP API Design Guide

https://geemus.gitbooks.io/http-api-design/content/en/
1•jcbhmr•34m ago•0 comments

Home made GPU escalated quickly [video]

https://www.youtube.com/watch?v=qMR3IXF2sWw
1•bane•34m ago•0 comments

The Evolution of Agents: From Context Engineering to Long-Running Harnesses

https://jinyansu1.github.io/blog/2026/07/agent-context-engineering-long-running-harness/
1•vinhnx•38m ago•0 comments

Tea App Checker

https://teaappchecker.com
2•thefirstname322•42m ago•0 comments

Cisco Killed Smartlook – Good Riddance for Expensive Pricing

https://www.cisco.com/c/en/us/products/collateral/software/smartlook-com-eol.html
1•mrr7337•45m ago•0 comments

ChorusGraph – Agent graph runtime (not a LangGraph wrapper) with built-in cache

https://github.com/insightitsGit/ChorusGraph
1•insightits•46m ago•0 comments

Cargo-nextest: 3x faster than cargo test, per-test isolation, first-class CI

https://nexte.st/
1•nateb2022•57m ago•0 comments

Adam is the top OpenCode contributor by line count visualized

https://app.principal-ade.com/anomalyco/opencode
1•fernando-ram•1h ago•0 comments

The Oldest Problem That Was Never Solved

https://www.nirajgohil.com/essay/the-oldest-problem/
1•Niraj1513•1h ago•0 comments

What Is AI Native Development?

https://brunelly.com/articles/what-is-ai-native-development
2•rihabzt•1h ago•0 comments

No Cost EMI: Full Guide, Eligibility, Benefits and Details – SMFG India Credit

https://www.smfgindiacredit.com/knowledge-center/what-is-no-cost-emi.aspx
1•saumyaraut11•1h ago•0 comments

Underspecification Does Not Imply Incoherence in LLM Code Generation

https://arxiv.org/abs/2607.01953
1•ilreb•1h ago•0 comments

Who runs this propaganda machine?

https://clocktowerx.com/
1•smalltorch•1h ago•1 comments

How to Follow a Drummer

https://drummate.app/blog/how-to-follow-a-drummer
1•sashyo•1h ago•0 comments

FIFA lifts Balogun's World Cup suspension after Trump calls Infantino

https://www.france24.com/en/sport/20260705-fifa-lifts-balogun-world-cup-suspension-trump-call
3•Tomte•1h ago•0 comments

Learn Faster with Your Personal AI Teacher

https://aischoolbuilder.com/school/school-1786
1•bokeke1•1h ago•0 comments

The final voyage of USS Nimitz

https://news.usni.org/2026/07/03/uss-nimitz-an-aircraft-carriers-final-journey
5•Gaishan•1h ago•1 comments

4D-printing method creates lighter, faster-spinning wind turbine blades

https://www.concordia.ca/cunews/encs/2026/07/02/research-new-4d-printing-method-creates-lighter-f...
1•geox•1h ago•0 comments