{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://entroia.local/schemas/poster-document-v1.json",
  "title": "PosterDocument",
  "type": "object",
  "required": ["schema", "version", "id", "seed", "canvas", "layers"],
  "properties": {
    "schema": { "const": "entroia.poster-document" },
    "version": { "const": 1 },
    "id": { "type": "string", "minLength": 1 },
    "seed": { "type": "string", "minLength": 1 },
    "canvas": {
      "type": "object", "required": ["width", "height"],
      "properties": { "width": { "type": "number", "exclusiveMinimum": 0 }, "height": { "type": "number", "exclusiveMinimum": 0 }, "background": { "type": "string" } }
    },
    "layers": { "type": "array", "items": { "$ref": "#/$defs/layer" } },
    "bindings": { "type": "object" }, "meta": { "type": "object" }
  },
  "$defs": {
    "layer": {
      "type": "object", "required": ["id", "type"],
      "properties": {
        "id": { "type": "string" },
        "type": { "enum": ["background", "group", "image", "vector", "text", "sticker", "brush"] },
        "visible": { "type": "boolean" }, "locked": { "type": "boolean" }, "opacity": { "type": "number", "minimum": 0, "maximum": 1 },
        "tags": { "type": "array", "items": { "type": "string" } },
        "children": { "type": "array", "items": { "$ref": "#/$defs/layer" } }
      }, "additionalProperties": true
    }
  }
}