Koas parameters attempts to coerce path and query parameters to the type specified in their respective JSON schema.
Koas body parser parses and validates request bodies based on the current operation.
Koas serializer converts a response body to the negotiated response format.
Koas security checks if a request matches the security requirement of an operation. For example, given the following partial OpenAPI document:
Koas operations maps operation IDs to Koa controller functions.