In my experience (we have a product where people upload Swagger files), most people write it by hand. There's two reasons: 1) Many people use Swagger to design

In my experience (we have a product where people upload Swagger files), most people write it by hand. There's two reasons: 1) Many people use Swagger to design (rather than document), meaning the Swagger comes before the code 2) Most people just prefer to write it out, since the tooling otherwise isn't necessarily great (especially for non-developers) We ran a poll and "by hand" (either on Swagger Hub/Apiary, or locally) won by a landslide.