MCP OpenAPI Server

openapi: 3.0.0
info:
  title: Task Management API
  version: 1.0.0
  description: A Task Management API with complex parameter schemas and empty allOf combinations
  x-spec-id: task-management

components:
  schemas:
    Error:
      type: object
      properties:
        code:
          type: integer
          format: int32
        message:
          type: string

    TaskStatus:
      type: string
      enum:
        - TODO
        - IN_PROGRESS
        - BLOCKED
        - COMPLETED
        - CANCELLED

    TaskPriority:
      type: string
      enum:
        - LOW
        - MEDIUM
        - HIGH
        - CRITICAL

    BaseTask:
      type: object
      properties:
        id:
          type: string
          format: uuid
        title:
          type: string
          maxLength: 200
        description:
          type: string
        status:
          $ref: '#/components/schemas/TaskStatus'
        priority:
          $ref: '#/components/schemas/TaskPriority'
        createdAt:
          type: string
          format: date-time
      required:
        - id
        - title
        - status
        - priority

    Task:
      allOf:
        - $ref: '#/components/schemas/BaseTask'
        - type: object
          properties:
            assignee:
              type: string
              format: email
            dueDate:
              type: string
              format: date
            tags:
              type: array
              items:
                type: string
            subtasks:
              type: array
              items:
                $ref: '#/components/schemas/BaseTask'

    EmptyAllOfTask:
      allOf: []
      type: object
      properties:
        id:
          type: string
          format: uuid
        title:
          type: string

    TaskFilter:
      type: object
      properties:
        status:
          type: array
          items:
            $ref: '#/components/schemas/TaskStatus'
        priority:
          type: array
          items:
            $ref: '#/components/schemas/TaskPriority'
        assignee:
          type: string
          format: email
        dueDateFrom:
          type: string
          format: date
        dueDateTo:
          type: string
          format: date
        tags:
          type: array
          items:
            type: string

paths:
  /tasks:
    get:
      summary: List tasks
      operationId: listTasks
      parameters:
        - name: filter
          in: query
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/TaskFilter'
      responses:
        '200':
          description: List of tasks
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Task'
        '400':
          description: Invalid filter parameters
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'

    post:
      summary: Create task
      operationId: createTask
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/Task'
      responses:
        '201':
          description: Task created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Task'
        '400':
          description: Invalid task data
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error'

  /tasks/{taskId}/status:
    put:
      summary: Update task status
      operationId: updateTaskStatus
      parameters:
        - name: taskId
          in: path
          required: true
          schema:
            type: string
            format: uuid
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                status:
                  $ref: '#/components/schemas/TaskStatus'
              required:
                - status
      responses:
        '200':
          description: Task status updated
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Task'
        '404':
          description: Task not found
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error' 