NewBuilder creates a new engine builder.

NewSessionAssets creates a new session assets instance with the provided base URLs.

NewSprint creates a new sprint - engine doesn't use this but we do it when handling surveyor responses.

Builder is a builder for engine configs.

AirtimeServiceFactory resolves a session to an airtime service.

ClassificationServiceFactory resolves a session and classifier to an NLU service.

EmailServiceFactory resolves a session to a email service.

TicketServiceFactory resolves a session to a ticket service.

WebhookServiceFactory resolves a session to a webhook service.