Type system

EchoNext recognizes typed handler shapes for routes with and without request bodies and responses.

func(c echo.Context) (Response, error)
func(c echo.Context, request Request) (Response, error)
func(c echo.Context) error

The wrapper inspects the handler, creates the request value, binds JSON or query fields, validates it, invokes the handler, and serializes the response.

Tag responsibilities

• json controls JSON field names and omission.
• query maps query-string values.
• validate declares request constraints.

Use named structs for public requests and responses. They produce clearer compiler errors, tests, and OpenAPI schemas than deeply nested anonymous values.