blog.pckt.block.image

{
  "id": "blog.pckt.block.image",
  "defs": {
    "main": {
      "type": "object",
      "required": [
        "attrs"
      ],
      "properties": {
        "attrs": {
          "ref": "#imageAttrs",
          "type": "ref",
          "description": "Image attributes"
        }
      }
    },
    "imageAttrs": {
      "type": "object",
      "required": [
        "src"
      ],
      "properties": {
        "alt": {
          "type": "string",
          "maxLength": 1000,
          "description": "Alternative text description for accessibility and screen readers",
          "maxGraphemes": 300
        },
        "src": {
          "type": "string",
          "maxLength": 2000,
          "description": "Image source URL or blob reference (blob:CID format for AT Protocol blobs)"
        },
        "blob": {
          "type": "blob",
          "accept": [
            "image/*"
          ],
          "maxSize": 10000000,
          "description": "AT Protocol blob reference (10MB max). Used when image is uploaded to PDS."
        },
        "align": {
          "enum": [
            "left",
            "center",
            "right"
          ],
          "type": "string",
          "description": "Horizontal alignment of the image within its container"
        },
        "title": {
          "type": "string",
          "maxLength": 500,
          "description": "Optional image title displayed on hover",
          "maxGraphemes": 200
        },
        "aspectRatio": {
          "ref": "#aspectRatio",
          "type": "ref",
          "description": "Image aspect ratio for proper layout before loading"
        }
      },
      "description": "Image attributes"
    },
    "aspectRatio": {
      "type": "object",
      "required": [
        "width",
        "height"
      ],
      "properties": {
        "width": {
          "type": "integer",
          "minimum": 1,
          "description": "Width component of aspect ratio"
        },
        "height": {
          "type": "integer",
          "minimum": 1,
          "description": "Height component of aspect ratio"
        }
      },
      "description": "Image aspect ratio represented as width and height dimensions"
    }
  },
  "$type": "com.atproto.lexicon.schema",
  "lexicon": 1,
  "description": "An image block for displaying visual content. Supports both external URLs and AT Protocol blob storage with automatic aspect ratio preservation."
}