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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•11mo 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!

Palantir's Alex Karp: Technological Republic, in Brief

https://twitter.com/PalantirTech/status/2045574398573453312
1•simonebrunozzi•31s ago•0 comments

OpenCode-power-pack – Claude Code skills ported to OpenCode

https://github.com/waybarrios/opencode-power-pack
1•waybarrios•37s ago•0 comments

Interaction Nets and Hardware

https://tendrils.co/background
1•nilscrm•56s ago•0 comments

AI doom warnings are getting louder. Are they realistic?

https://www.nature.com/articles/d41586-026-01257-6?WT.ec_id=NATURE-20260423&utm_source=nature_eto...
1•Anon84•1m ago•0 comments

Show HN: realistic_blas: Exact infinite-precision LA, useful errs, f64 fast path

https://github.com/timschmidt/realistic_blas
1•timschmidt•3m ago•0 comments

SensibleJS – Reactive UI in ~10KB with Plain HTML Attributes

https://github.com/ricardoaponte/sensiblejs
2•ricardoaponte•4m ago•0 comments

Show HN: iOS app that visualizes your brainrot

https://apps.apple.com/us/app/oh-my-hours/id6760450002
1•jarko27•4m ago•0 comments

If more than 50% press blue, everyone survives. Red pressers always survive

https://shankwiler.com/posts/button-survival-hypothetical/
1•iuvcaw•4m ago•0 comments

My brave new code-signing world

https://nullprogram.com/blog/2026/04/25/
1•ibobev•5m ago•0 comments

The Beijing Auto Show is a glimpse at the future of the auto industry

https://electrek.co/2026/04/26/beijing-auto-show-2026-insane-glimpse-future-auto-industry/
1•dabinat•5m ago•0 comments

Primus Projection: Estimate Memory and Performance Before You Train

https://rocm.blogs.amd.com/software-tools-optimization/primus-projection/README.html
1•matt_d•6m ago•0 comments

2026 Japan Stationary Award Winners [video]

https://www.youtube.com/watch?v=NDptFWx69kE
1•simonjgreen•7m ago•0 comments

Show HN: pg_savior: a seatbelt for Postgres – blocks accidental DELETE/UPDATE

https://github.com/viggy28/pg_savior
1•vira28•9m ago•0 comments

Namastex.ai NPM Packages Hit with TeamPCP-Style CanisterWorm Malware

https://socket.dev/blog/namastex-npm-packages-compromised-canisterworm
1•My_Name•9m ago•0 comments

Orwell: You and the Atom Bomb

https://www.orwellfoundation.com/the-orwell-foundation/orwell/essays-and-other-works/you-and-the-...
1•simonebrunozzi•10m ago•0 comments

I built a Wayland window manager you can extend with WebAssembly

https://github.com/miracle-wm-org/miracle-wm
1•matthewkosarek•12m ago•0 comments

Browser Mutation, a Codex plugin for turning visual UI edits into code changes

https://github.com/JosPMSilva/Browser-mutation
1•JosPMSilva•13m ago•1 comments

Dillo Browser Release 3.3.0

https://dillo-browser.org/release/3.3.0/
2•rodarima•15m ago•0 comments

Show HN: I made Claude Code listen before it codes (MIT)

https://github.com/basegraphhq/relay-plugin
2•nithin_2001•16m ago•0 comments

Show HN: SlothDB is a super fast embedded SQL database

2•souravroy78•16m ago•1 comments

Show HN: Parlor Jarvis – Realtime AI (audio+screen in, voice out) & multilingual

https://github.com/typomonster/parlor-jarvis
2•unusual_typo•20m ago•1 comments

Ask HN: Why hasn't automation testing been disrupted with LLMs?

1•grandimam•21m ago•0 comments

GPT cannot even count beans correctly

https://chatgpt.com/share/69ee4690-60ac-83ea-b28c-f4ce6284a75a
1•OutOfHere•23m ago•0 comments

Sub two-hour marathon record broken

https://www.espn.com/olympics/trackandfield/story/_/id/48598786/sabastian-sawe-wins-london-marath...
2•staplung•24m ago•0 comments

Google's new gradient icons for Gmail, Calendar, Drive, and other apps

https://9to5google.com/2026/04/26/gmail-google-gradient-redesign/
2•meetpateltech•26m ago•1 comments

Sabastian Sawe becomes the first man ever to break 2 hours in a marathon

https://twitter.com/ChrisChavez/status/2048357328894759363
1•ndr42•28m ago•0 comments

PRowhammer: Propagating Bit-flips from CPU to GPU [pdf]

https://www.cse.iitb.ac.in/~biswa/ISCA2026.pdf
1•matt_d•28m ago•0 comments

Proposed New Test of AI Capabilities:)

1•VikRubenfeld•30m ago•0 comments

Seemingly Conscious AI Risks

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=6588659&trk=comments_comments-list_comment-text
2•andy99•31m ago•0 comments

Dockframe, modular USB-C hub based on framework adapter cards

http://dockframe.com
2•heatmiser•33m ago•1 comments