{
  "$schema": "https://json-schema.org/draft-07/schema#",
  "type": "object",
  "properties": {
    "repository": {
      "description": "Repository to which the milestone belongs",
      "type": "string"
    },
    "url": {
      "description": "API endpoint URL for the milestone",
      "type": ["null", "string"]
    },
    "html_url": {
      "description": "URL to view the milestone in a web browser",
      "type": ["null", "string"]
    },
    "labels_url": {
      "description": "URL to fetch labels associated with the milestone",
      "type": ["null", "string"]
    },
    "id": {
      "description": "Unique identifier for the milestone",
      "type": ["null", "integer"]
    },
    "node_id": {
      "description": "Unique identifier for the milestone node",
      "type": ["null", "string"]
    },
    "number": {
      "description": "Numeric identifier for the milestone",
      "type": ["null", "integer"]
    },
    "state": {
      "description": "Current state of the milestone (open/closed)",
      "type": ["null", "string"]
    },
    "title": {
      "description": "Title or name of the milestone",
      "type": ["null", "string"]
    },
    "description": {
      "description": "Brief description of the milestone",
      "type": ["null", "string"]
    },
    "creator": {
      "description": "User who created the milestone",
      "$ref": "user.json"
    },
    "open_issues": {
      "description": "Total number of open issues within the milestone",
      "type": ["null", "integer"]
    },
    "closed_issues": {
      "description": "Total number of issues closed within the milestone",
      "type": ["null", "integer"]
    },
    "created_at": {
      "description": "Timestamp indicating when the milestone was created",
      "type": "string",
      "format": "date-time"
    },
    "updated_at": {
      "description": "Timestamp indicating when the milestone was last updated",
      "type": "string",
      "format": "date-time"
    },
    "closed_at": {
      "description": "Timestamp indicating when the milestone was closed",
      "type": ["null", "string"],
      "format": "date-time"
    },
    "due_on": {
      "description": "Timestamp indicating when the milestone is due",
      "type": ["null", "string"],
      "format": "date-time"
    }
  }
}