test.yaml

openapi: 3.0.3
info:
  title: Simple Multipart Upload API
  version: 1.0.0
paths:
  /upload:
    post:
      summary: Upload a file with JSON metadata
      requestBody:
        required: true
        content:
          multipart/form-data:
            schema:
              type: object
              required:
                - file
                - meta
              properties:
                file:
                  type: string
                  format: binary
                  description: The file to upload.
                meta:
                  type: object
                  description: JSON metadata describing the file.
                  properties:
                    title:
                      type: string
                    tags:
                      type: array
                      items:
                        type: string
            encoding:
              meta:
                contentType: application/json
      responses:
        '201':
          description: Created
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                  message:
                    type: string
              examples:
                success:
                  value:
                    id: "abc123"
                    message: "Upload accepted."
servers:
  - url: https://api.example.com