WordPress/wp-includes/blocks/pattern/block.json

{
	"apiVersion": 2,
	"name": "core/pattern",
	"title": "Pattern",
	"category": "design",
	"description": "Show a block pattern.",
	"supports": {
		"html": false,
		"inserter": false
	},
	"textdomain": "default",
	"attributes": {
		"slug": {
			"type": "string"
		}
	}
}