{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://core-hub.local/contracts/schemas/hub-manifest.schema.json",
  "title": "Core Hub Capability Manifest",
  "type": "object",
  "required": ["hub_slug", "manifest_version", "capabilities"],
  "additionalProperties": false,
  "properties": {
    "hub_slug": {
      "type": "string",
      "pattern": "^[a-z0-9][a-z0-9-]*$"
    },
    "manifest_version": {
      "type": "string"
    },
    "capabilities": {
      "type": "array",
      "items": {"type": "string"},
      "uniqueItems": true
    },
    "endpoints": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["rel", "href"],
        "additionalProperties": false,
        "properties": {
          "rel": {"type": "string"},
          "href": {"type": "string"}
        }
      },
      "default": []
    }
  }
}