{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/ChatMessage",
  "title": "ChatMessage",
  "type": "object",
  "description": "Represents a message in a channel or chat.",
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique identifier for the message.",
      "example": "msg-001"
    },
    "createdDateTime": {
      "type": "string",
      "format": "date-time",
      "description": "When the message was created.",
      "example": "2026-04-18T10:30:00Z"
    },
    "lastModifiedDateTime": {
      "type": "string",
      "format": "date-time",
      "description": "When the message was last modified.",
      "example": "2026-04-18T10:30:00Z"
    },
    "messageType": {
      "type": "string",
      "description": "The type of message.",
      "enum": [
        "message",
        "chatEvent",
        "typing",
        "unknownFutureValue",
        "systemEventMessage"
      ],
      "example": "message"
    },
    "importance": {
      "type": "string",
      "enum": [
        "normal",
        "high",
        "urgent"
      ],
      "description": "Message importance.",
      "example": "normal"
    },
    "subject": {
      "type": "string",
      "description": "Subject of the message.",
      "example": "Project Update"
    },
    "body": {
      "type": "object",
      "properties": {
        "contentType": {
          "type": "string",
          "enum": [
            "text",
            "html"
          ],
          "example": "html"
        },
        "content": {
          "type": "string",
          "example": "<p>Here is the latest update on the project.</p>"
        }
      }
    },
    "from": {
      "type": "object",
      "properties": {
        "user": {
          "type": "object",
          "properties": {
            "id": {
              "type": "string",
              "example": "user-123"
            },
            "displayName": {
              "type": "string",
              "example": "Jane Smith"
            }
          }
        }
      }
    }
  }
}