I see it notes OpenAPI 3.1 support, but it's using kin-openapi which doesn't yet support OpenAPI - how have you managed that?
(speaking as someone building on top of kin-openapi, as a core maintainer for oapi-codegen)
https://blacksmoke16.github.io/oq/ | https://github.com/Blacksmoke16/oq
(as I discovered when I installed oq via homebrew to find myself with a different app)