{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://cheeleong.dev/wwn-system-json/systems/focus.schema.json",
  "title": "WWN Focus",
  "type": "object",
  "allOf": [{ "$ref": "https://cheeleong.dev/wwn-system-json/systems/common.schema.json#/$defs/Entity" }],
  "properties": {
    "@type": { "const": "Focus" },
    "levels": { "type": "array", "items": { "$ref": "https://cheeleong.dev/wwn-system-json/systems/common.schema.json#/$defs/ProgressionRow" }, "minItems": 1 },
    "prerequisites": { "type": "array", "items": { "type": ["string", "object"] } }
  },
  "required": ["source", "levels"],
  "unevaluatedProperties": false
}