{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://aindf.oleg.design/schemas/slots.schema.json",
  "title": "AINDF Slots",
  "description": "Slot contracts: what each slot accepts (by layer / component / contract), how many, and in what order.",
  "type": "object",
  "required": ["aindfVersion", "slotsets"],
  "additionalProperties": false,
  "properties": {
    "aindfVersion": { "type": "string" },
    "slotsets": {
      "type": "array",
      "items": { "$ref": "#/$defs/slotset" }
    }
  },
  "$defs": {
    "slotset": {
      "type": "object",
      "required": ["component", "slots"],
      "additionalProperties": false,
      "properties": {
        "component": { "type": "string" },
        "slots": {
          "type": "array",
          "items": { "$ref": "#/$defs/slot" }
        }
      }
    },
    "slot": {
      "type": "object",
      "required": ["name", "accepts", "cardinality"],
      "additionalProperties": false,
      "properties": {
        "name": { "type": "string", "description": "BEM slot, e.g. card__body" },
        "accepts": {
          "type": "object",
          "description": "at least one of: layers, components, contracts",
          "additionalProperties": false,
          "minProperties": 1,
          "properties": {
            "layers": {
              "type": "array",
              "items": { "enum": ["atoms", "elements", "blocks", "sections"] }
            },
            "components": { "type": "array", "items": { "type": "string" } },
            "contracts": { "type": "array", "items": { "type": "string" } }
          }
        },
        "cardinality": { "enum": ["0..1", "1..1", "0..*", "1..*"] },
        "order": { "type": "integer" },
        "required": { "type": "boolean" }
      }
    }
  }
}