Generating components.responses objects

[happenslol]

I have a global catch-all error type that can be returned from every endpoint:

@error
@defaultResponse
model InternalServerError {
	@statusCode _: 500;
	code: string;
	message?: string;
}

alias Result<T> = T | InternalServerError;

Then, I wrap all of my ops return types with Result. This allows me to have typed internal server errors for every endpoint. This results in the following OpenAPI spec:

paths:
  /some-path:
    responses:
      # ...
      default:
        description: An unexpected error response.
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/InternalServerError'
# ...
components:
  schemas:
    InternalServerError:
      type: object
      required:
        - code
      properties:
        code:
          type: string
        message:
          type: string

However, my backend codegen sees each default response as a seperate response, which means that a seperate type is generated for the default error of every endpoint.

From an OpenAPI standpoint, I think the best practice here would be to have a schema in components.responses like so:

paths:
  /some-path:
    responses:
      # ...
      default:
        $ref: '#/components/responses/InternalServerError'
# ...
components:
  responses:
    InternalServerError:
      description: An unexpected error response.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/InternalServerError'

This would result in the response type only being generated once.

I see no way of defining a response as a component with typespec. Is this just not possible or am I just going about it the wrong way?