What tools or processes do you use to go from an idea to a working API including an OpenAPI specification?
I've done this many times using code generation, etc. but still find the iteration time to be too long. Ideally, I'd like to get close to the speed of thought.
Bonus points if you can point to a code repository as an example.
Otherwise, this is a good guideline:
http://sweng.the-davies.net/Home/rustys-api-design-manifesto