Imagine an activity in your life that is rare, important, and expensive to get wrong. Typically there are ways to rehearse a scenario to visualize and prepare for that scenario. There are scenarios in life we do not have an easy way to rehearse. A recent metaphor that I came up with is about the importance of creating an on the rails API-Design experience. Have you ever prepared for a car crash? Do you know if your airbags will work? We trust that the airbags will deploy and reduce our injuries during this rare event. Dev.Lab focuses on the creation of an on-rails experience of API-first design. We know mastery of API design is uncommon. It is worth it to enable everyone to be successful.