[dluan]

For some context, just presented by Matz at RubyKaigi 2026. It’s experimental but he built it with help from Claude in about a month. Successful live demo.

It’s named after his new cat, which is named after a cat in Card Captor Sakura, which is the partner to another character named Ruby.

[rayiner]

> It’s experimental but he built it with help from Claude in about a month.

We talk a lot about AI building programs from soup to nuts. But I think people overlook the more likely scenario. AI will turn 10x programmers into 100x programmers. Or in Matz’s case maybe 100x programmers into 500x programmers.

[satvikpendem]

AI is the function f(x) = x • |x|. It turns 10x into 100x, 1x into 1x, and -10x into -100x.

[networked]

Something there, but this sounds too optimistic for x ∈ [-1, 0] and too pessimistic for x ∈ [0, 1].

[satvikpendem]

I should specify the domain to be ℤ

[DeathArrow]

It actually helps me write better code. I am pretty lazy so I kind of don't do much refactoring unless I have to, I care mostly about happy paths and I kind of avoid treating edge cases unless I can't do it. I usually don't optimize much.

But since writing code is very easy now with AI I write better code because it doesn't take me more time and effort.

[the_gastropod]

That cat story seems more than a little suspicious given the Ruby Central drama / its relation to the founders of Spinel.coop. This project feels likely vindictively named.

[debugnik]

The most recent cartoon Spinel in my mind is from Steven Universe, so I hadn't noticed the Spinel/Ruby (Moon) pun, that made my day.

[nxobject]

I never expected SU to come up in HN! Unfortunately, it wouldn't be the best reference...

[LoganDark]

Did something happen with SU?

[nxobject]

Oh, no – I meant Spinel and her tragic past.

[modernerd]

Thanks! Video doesn't seem to be live yet but they seem to be dripping them out here:

https://www.youtube.com/@rubykaigi4884/videos

[riffraff]

oh, I thought it was about the mineral which is ruby-ish :)

https://en.wikipedia.org/wiki/Spinel