I may have been too quick to judge - I first thought sigtool was a superset of openbsd signify - not a work-a-like. And it appeared sigtool's approach with prob

I may have been too quick to judge - I first thought sigtool was a superset of openbsd signify - not a work-a-like. And it appeared sigtool's approach with probuf was somewhat sturdier than a custom spec/format (although the age spec does look quite nice and straightforward). Additionally, I came across some comments on age's custom primitives - but I suppose that's also similar for the two. Ed: thank you for your work on age!