{
  "definitions": {
    "channel": {
      "description": "投稿先となるチャンネルID",
      "type": "string"
    },
    "text": {
      "description": "投稿内容",
      "type": "string"
    },
    "attachments": {
      "type": "array",
      "items": {
        "$ref": "../../message/attachment.json#/definitions/attachment"
      }
    },
    "as_user": {
      "type": "boolean",
      "default": false
    },
    "blocks": {
      "type": "array",
      "items": {
        "$ref": "../../message/block.json#/definitions/block"
      }
    },
    "icon_emoji": {
      "type": "string",
      "examples": [":+1:", ":smile:", ":tada:"]
    },
    "icon_url": {
      "$ref": "../../../pattern.json#/definitions/string/url"
    },
    "link_names": {
      "type": "boolean"
    },
    "mrkdwn": {
      "type": "boolean",
      "default": true
    },
    "parse": {
      "description": "Change how messages are treated. Defaults to none",
      "type": "string",
      "examples": ["full"]
    },
    "reply_broadcast": {
      "type": "boolean"
    },
    "thread_ts": {
      "description": "Provide another message's ts value to make this message a reply. Avoid using a reply's ts value; use its parent instead",
      "type": "string",
      "examples": ["1234567890.123456"]
    },
    "unfurl_links": {
      "type": "boolean"
    },
    "unfurl_media": {
      "type": "boolean"
    },
    "username": {
      "type": "string",
      "examples": ["My Bot"]
    },
    "postMessage": {
      "type": "object",
      "properties": {
        "channel": {
          "$ref": "#/definitions/channel"
        },
        "text": {
          "$ref": "#/definitions/text"
        },
        "as_user": {
          "$ref": "#/definitions/as_user"
        },
        "attachments": {
          "$ref": "#/definitions/attachments"
        },
        "blocks": {
          "$ref": "#/definitions/blocks"
        },
        "icon_emoji": {
          "$ref": "#/definitions/icon_emoji"
        },
        "icon_url": {
          "$ref": "#/definitions/icon_url"
        },
        "link_names": {
          "$ref": "#/definitions/link_names"
        },
        "mrkdwn": {
          "$ref": "#/definitions/mrkdwn"
        },
        "parse": {
          "$ref": "#/definitions/parse"
        },
        "reply_broadcast": {
          "$ref": "#/definitions/reply_broadcast"
        },
        "thread_ts": {
          "$ref": "#/definitions/thread_ts"
        },
        "unfurl_links": {
          "$ref": "#/definitions/unfurl_links"
        },
        "unfurl_media": {
          "$ref": "#/definitions/unfurl_media"
        },
        "username": {
          "$ref": "#/definitions/username"
        }
      }
    }
  }
}