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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!

Is there a name for the type of comments agents add where they leak the prompt?

1•xdennis•2m ago•0 comments

Frontier Language Model Intelligence, over Time

https://artificialanalysis.ai/?model-creators=anthropic%2Cmistral#frontier-language-model-intelli...
1•doener•3m ago•0 comments

Anthropic's Zero Trust for AI Agents Sets the Right Test. The Bearer Token Fails

https://blog.hello.coop/2026/06/anthropics-zero-trust-for-ai-agents-sets-the-right-test-the-beare...
2•mooreds•4m ago•0 comments

LLMs Pre-Commodify Ideas

https://summerlightning.substack.com/p/llms-pre-commodify-ideas
1•Stwerner•7m ago•0 comments

A collection of things that are not Arabic

https://notarabic.com/
1•Georgelemental•7m ago•0 comments

On May the 4th, Let's Remember Why Fans of All Factions Love Star Wars (2016)

https://www.themarysue.com/on-may-the-4th-lets-remember-why-fans-of-all-factions-love-star-wars/
1•mooreds•11m ago•0 comments

State Attorneys General Are Investigating OpenAI

https://www.nytimes.com/2026/06/13/technology/states-investigating-openai.html
6•donohoe•15m ago•0 comments

Llama.cpp – Run LLM Inference in C/C++

https://llama-cpp.com/
1•doener•16m ago•0 comments

P2claw – Peer-to-peer hosting for vibe coders

https://p2claw.com/
2•apitman•21m ago•0 comments

Immutable Collections for JavaScript

https://immutable-js.com/
1•doener•22m ago•1 comments

Show HN: A bunch of Apache2/MIT log generators

https://github.com/expanso-io/log-simulators
2•TheIronYuppie•24m ago•0 comments

Show HN: I built 80 mini-games using Fable before it was shut down

https://minigames.world/en
31•legocoder•32m ago•16 comments

Some Ethical Problems with AI

https://arkvis.com/blog/2026-06-10_some-ethical-problems-with-ai.html
1•phyzix5761•35m ago•0 comments

Boot making and mending including repairing, lasting and finishing (1898)

https://gutenberg.org/cache/epub/78854/pg78854-images.html
2•petethomas•37m ago•0 comments

ReactOS (FOSS "Windows") achieves 3D-accelerated Half-Life on real hardware

https://www.phoronix.com/news/ReactOS-Running-Half-Life
8•jeditobe•45m ago•0 comments

Atlassian "Data Contribution"

2•yells_jovially•46m ago•0 comments

Claude Code v2.1.172: Sub-Agents Can Now Spawn Sub-Agents

https://byteiota.com/claude-code-v2-1-172-sub-agents-can-now-spawn-sub-agents/
2•sscaryterry•50m ago•0 comments

Show HN: I run a vision model on every screenshot, locally, on a 4GB GPU

https://github.com/ayushh0110/ScreenMind
7•skye0110•54m ago•1 comments

What Every Productivity App Trades Away [video]

https://www.youtube.com/watch?v=OuEKdD_1F8s
2•zdw•55m ago•0 comments

The Economics Behind the Spurs

https://bycig.substack.com/p/the-economics-behind-the-spurs
2•paulpauper•59m ago•1 comments

Has AI Killed How-To Nonfiction?

https://tim.blog/2026/06/12/has-ai-already-killed-nonfiction/
4•paulpauper•1h ago•0 comments

Sometimes it is hard to solve for the equilibrium

https://marginalrevolution.com/marginalrevolution/2026/06/sometimes-it-is-hard-to-solve-for-the-e...
2•paulpauper•1h ago•0 comments

'The traveler' book review: An enlightening voyage

https://www.wsj.com/arts-culture/books/the-traveler-review-an-enlightening-voyage-e9754ecb
2•hhs•1h ago•0 comments

Coronavirus and Credibility (2020)

https://paulgraham.com/cred.html
2•downbad_•1h ago•0 comments

White House's export limits on Anthropic linked to concerns about Chinese access

https://www.semafor.com/article/06/13/2026/white-house-move-to-limit-anthropic-linked-to-concerns...
5•shscs911•1h ago•0 comments

Getting Creative with Perlin Noise Fields

https://sighack.com/post/getting-creative-with-perlin-noise-fields
3•0x000xca0xfe•1h ago•0 comments

Ancient genome duplications laid the foundations of complex brains

https://www.ox.ac.uk/news/2026-06-09-ancient-genome-duplications-laid-the-foundations-of-complex-...
3•hhs•1h ago•0 comments

The 27 Platform Releases – June 2026

https://developer.apple.com/documentation/Updates
2•Austin_Conlon•1h ago•0 comments

Four by Three

https://www.hankgreen.com/fourbythree
2•_tk_•1h ago•0 comments

New research reveals how brains update their predictions

https://source.washu.edu/2026/06/new-research-reveals-how-brains-update-their-predictions/
2•hhs•1h ago•0 comments