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Statecharts: hierarchical state machines

https://statecharts.dev/
45•sph•2h ago•5 comments

Amateur armed with ChatGPT solves an Erdős problem

https://www.scientificamerican.com/article/amateur-armed-with-chatgpt-vibe-maths-a-60-year-old-pr...
437•pr337h4m•18h ago•274 comments

The West forgot how to make things, now it’s forgetting how to code

https://techtrenches.dev/p/the-west-forgot-how-to-make-things
510•milkglass•5h ago•293 comments

Why has there been so little progress on Alzheimer's disease?

https://freakonomics.com/podcast/why-has-there-been-so-little-progress-on-alzheimers-disease/
257•chiefalchemist•11h ago•158 comments

Show HN: Turning a Gaussian Splat into a videogame

https://blog.playcanvas.com/turning-a-gaussian-splat-into-a-videogame/
37•yak32•2d ago•6 comments

I spent 6 years building my Kanban as I hated how managers run the boards

https://www.npmjs.com/package/ooko
37•okovooo•2d ago•30 comments

Tell HN: An app is silently installing itself on my iPhone every day

307•_-x-_•11h ago•124 comments

USB Cheat Sheet (2022)

https://fabiensanglard.net/usbcheat/index.html
355•gwerbret•14h ago•64 comments

GnuPG – post-quantum crypto landing in mainline

https://lists.gnupg.org/pipermail/gnupg-announce/2026q2/000504.html
83•zdkaster•8h ago•26 comments

Exposing Floating Point – Bartosz Ciechanowski (2019)

https://ciechanow.ski/exposing-floating-point/
37•subset•4h ago•4 comments

Mahjong: A Visual Guide

https://themahjong.guide/
111•iamwil•2d ago•30 comments

The route from Prussian military headquarters to Gary Gygax’s basement

https://asteriskmag.com/issues/14/shall-we-play-a-game
37•jger15•2d ago•2 comments

OpenAI Privacy Filter

https://openai.com/index/introducing-openai-privacy-filter/
227•tanelpoder•3d ago•45 comments

Quirks of Human Anatomy

https://www.sdbonline.org/sites/fly/lewheldquirk/figlegq6.htm
43•gurjeet•1d ago•20 comments

The Free Universal Construction Kit

https://fffff.at/free-universal-construction-kit/
326•robinhouston•4d ago•71 comments

Terra API (YC W21) Hiring: Applied AI Strategist(Health Intelligence)

https://www.ycombinator.com/companies/terra-api/jobs/DY7BCZU-applied-ai-strategist-market-intelli...
1•kyriakosel•4h ago

Cheating at Tetris

https://chalkdustmagazine.com/features/cheating-at-tetris/
4•t-3•3d ago•1 comments

Flickr: The first and last great photo platform

https://petapixel.com/2026/04/22/flickr-the-first-and-last-great-photo-platform/
187•Nrbelex•3d ago•87 comments

Using coding assistance tools to revive projects you never were going to finish

https://blog.matthewbrunelle.com/its-ok-to-use-coding-assistance-tools-to-revive-the-projects-you...
279•speckx•19h ago•175 comments

The Joy of Folding Bikes

https://blog.korny.info/2026/04/19/the-joy-of-folding-bikes
187•pavel_lishin•3d ago•120 comments

EU Age Control: The trojan horse for digital IDs

https://juraj.bednar.io/en/blog-en/2026/04/17/eu-age-control-the-trojan-horse-for-digital-ids/
204•gasull•8h ago•107 comments

Eden AI – European Alternative to OpenRouter

https://www.edenai.co
60•muzzy19•3h ago•32 comments

Show HN: A free ESG stock screener that publishes its losses and methodology

https://jumpstartsignal.com/
3•irldexter•2h ago•1 comments

America's Geothermal Breakthrough

https://oilprice.com/Alternative-Energy/Geothermal-Energy/Americas-Geothermal-Breakthrough-Could-...
115•sleepyguy•16h ago•138 comments

Math Is Hard – OpenBSD Stories

http://miod.online.fr/software/openbsd/stories/vaxfp.html
122•signa11•2d ago•9 comments

The Super Nintendo Cartridges (2024)

https://fabiensanglard.net/snes_carts/
75•offbyone42•11h ago•11 comments

APL is more French than English

https://www.jsoftware.com/papers/perlis78.htm
22•tosh•4h ago•12 comments

The Knight Programming Language

https://github.com/knight-lang/knight-lang/tree/master
12•tosh•4h ago•4 comments

Hokusai and Tesselations

https://dl.ndl.go.jp/pid/1899550/1/11/
117•srean•18h ago•15 comments

Simulacrum of Knowledge Work

https://blog.happyfellow.dev/simulacrum-of-knowledge-work/
156•thehappyfellow•18h ago•64 comments
Open in hackernews

You can now directly sync Postgres with Redis

https://github.com/redfly-ai-org/redfly.ai
22•vijaymohan1979•11mo ago

Comments

yohannparis•11mo ago
No Pricing information nor an open-source project. I don't know what to do with this product.
jasonlotito•11mo ago
Assuming the link to the repo is correct: it's open source.

https://github.com/redfly-ai-org/redfly.ai/blob/main/LICENSE

bradleyjkemp•11mo ago
I believe this is another case of abusing GitHub for visibility, not actually doing anything meaningful open source

The code in the repo just seems to be connection code ("provides a way for anybody to test our Redis synchronization service on demand") rather than the sync service itself

vijaymohan1979•11mo ago
https://github.com/redfly-ai-org/redfly.ai/wiki/Q-&-A
maxmcd•11mo ago
Since db cache consistency is a complex research space with things like https://readyset.io/ and https://www.usenix.org/system/files/conference/nsdi13/nsdi13... it would be great to hear more specifics about what this is giving up in order to sidestep all that complexity.
_1tem•11mo ago
There’s also Polyscale as a service.
vijaymohan1979•11mo ago
https://github.com/redfly-ai-org/redfly.ai/wiki/Q-&-A
vijaymohan1979•11mo ago
https://github.com/redfly-ai-org/redfly.ai/wiki/Q-&-A
henning•11mo ago
It'd be nice to see documentation of how it works. Is it using a replication channel for Postgres? The write-ahead log? It looks like it does schema introspection and then works off that. How does it handle schema changes? How does this work in scenarios where you have multi-master replication? What's the compatibility with popular Postgres extensions like PostGIS? What happens if the database is rebooted or crashes? Yes I realize the source is there.
porridgeraisin•11mo ago
> Yes, I realize the source is there

It isn't actually. The codein the repo just seems to be some scaffolding.

vijaymohan1979•11mo ago
https://github.com/redfly-ai-org/redfly.ai/wiki/Q-&-A
hangonhn•11mo ago
Did you really mean to leave your AES key in the code in RedflyEncryptionKeys?

> public const string AesKey = ...

Also, the way AES is used in the code is not good practice. It seems to be using plain AES ( https://learn.microsoft.com/en-us/dotnet/api/system.security... ), which isn't meant to be used bare like that. It needs to be coupled with a digest algorithm to protect the ciphertext. Maybe use AesGcm instead?

foxyv•11mo ago
The reason for this is that AES is not an authenticated algorithm so there is no way to determine if the ciphertext has been modified since encryption. The ciphertext could be modified/corrupted and you wouldn't know.

Also, AES is deterministic and will encrypt the same data the same way every time. This means if you are encrypting a lot of fields you will be able to do statistical attacks. Using an initialization vector with AES GCM is similar to salting a hash. This way there is no statistical method to determine the contents of the ciphertext.

vijaymohan1979•11mo ago
https://github.com/redfly-ai-org/redfly.ai/wiki/Q-&-A
solatic•11mo ago
Can someone ELI5 where this is going to be valuable?

If you set up Postgres read replicas, make sure your queries are covered by appropriate indexes, and your hot queries are handled by Postgres from RAM anyway - do you really need a separate Redis cache?

I feel like anytime I'm going to pull in Redis for a cache, it's going to be for data that I'm not interested in having guaranteed persistency for, like session tokens, and so it'll be for data that I wouldn't be storing in Postgres anyway?

lotharcable•11mo ago
Probably useful for sharing stuff with services that already have access to redis, but you don't want to add SQL client dependencies for and/or don't want to give access to your database.

But you want to be able to store/have single source of authority and update them using a SQL database.

This would then eliminate the need to maintain a separate lambda or cron job or something like that to keep them in sync.

vijaymohan1979•11mo ago
https://github.com/redfly-ai-org/redfly.ai/wiki/Q-&-A