Stripe is building a Ruby typechecker
Ruby has a reputation for being “magic” — its loose syntax and monkey-patching functionality allows developers to rapidly build powerful applications, but it can also lead to unclear and confusing code. With Sorbet, Ruby developers may have a new opportunity to bring some stability and clarity to their projects.
The obvious question, then, is when will Sorbet be available? According to @nelhage, an engineer at Stripe, work is still very much ongoing, and the project is still designed for internal use at Stripe.