Bug: Server accepts invalid response type + doesn't validate output

[mgm1313]

Given this operation:

  /healthz:
    get:
      operationId: healthCheck
      tags:
        - system
      summary: Health check endpoint
      description: Check if the API is up and running
      responses:
        "200":
          description: OK
          content:
            application/json:
              schema:
                type: object
                properties:
                  status:
                    type: string
                    example: "OK"

And this implementation

import * as api from "generated";

export const healthCheck: api.server.HealthCheckOperationHandler<{}> =
  async () => {
    return [200, "OK"];
  };

The client receives this response:

HTTP/1.1 200 OK
Connection: close
Content-Type: application/json
Date: Mon, 23 Sep 2024 08:41:06 GMT
Transfer-Encoding: chunked

[200,"OK"]

I would expect:

1. A typescript error because type string does not adhere to Record<'status', string>.
2. An error response from the server

Am I missing something maybe?