{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "additionalProperties": false,
  "description": "The callout block (content). Reads: none. Shape: none.",
  "properties": {
    "callout": {
      "additionalProperties": false,
      "properties": {
        "action": {
          "additionalProperties": false,
          "description": "A link to a screen of this app.",
          "properties": {
            "label": {
              "description": "The link's words.",
              "maxLength": 40,
              "minLength": 1,
              "type": "string"
            },
            "to": {
              "description": "The screen it opens.",
              "pattern": "^[a-z][a-z0-9-]{1,38}$",
              "type": "string"
            }
          },
          "required": [
            "label",
            "to"
          ],
          "type": "object"
        },
        "id": {
          "description": "The block's id: its Markdown anchor and its actions' route (`/act/<id>/<action>`). Default `<type>-<n>`, n counting blocks of this type depth-first from 1.",
          "pattern": "^[a-z][a-z0-9-]{1,38}$",
          "type": "string"
        },
        "text": {
          "description": "The message.",
          "maxLength": 1000,
          "minLength": 1,
          "type": "string"
        },
        "title": {
          "description": "The message's title.",
          "maxLength": 120,
          "minLength": 1,
          "type": "string"
        },
        "tone": {
          "default": "info",
          "description": "The message's tone.",
          "enum": [
            "info",
            "ok",
            "warn",
            "bad"
          ],
          "type": "string"
        }
      },
      "required": [
        "text"
      ],
      "type": "object"
    }
  },
  "required": [
    "callout"
  ],
  "title": "callout",
  "type": "object"
}