[akdor1154]

Yeah.. Have either of the ty / pyrefly teams reached out to the other? I feel like the community does not really need two fast python type checkers.

(However, vc-backed astral probably need control over theirs to keep monetization options open, and Facebook probably need control over theirs so it can be targeted at Facebook's internal cool-but-non-standard python habits... Sigh.

Why do we have nice things? Money. Why can't we have nice things? Also money.)

[_carljm]

Yes, we've talked; I know a number of the pyrefly devs well. Ty had already been months in development when pyrefly development started. We discussed collaboration, but they decided they needed to do their own thing in order to move quickly and ensure it would serve their needs, which is totally reasonable.

[digdugdirk]

It looks like both projects seem to use Ruff at their core, is there any documentation that describes the differences in each project's approach?

[theLiminator]

I believe the only sharing is parsing/ast.