{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:orbiplex:schema:room-relay-delivery:v1",
  "title": "RoomRelayDelivery v1",
  "description": "Ephemeral member-visible relay delivery that binds a validated Room carrier payload to one relay epoch and total-order sequence. A bounded audience carries source-admission evidence for recipient-filtered payloads but grants no independent authority. The explicit delivery/kind discriminator prevents ambiguity with encrypted deliveries. It MUST NOT contain session bearers.",
  "type": "object",
  "additionalProperties": false,
  "x-dia-workflow": "project",
  "x-dia-status": "draft",
  "x-dia-basis": ["P070", "P082", "P083"],
  "required": [
    "schema/v", "delivery/kind", "room/id", "relay/epoch", "relay/seq-no", "sender/subject",
    "payload/class", "payload/schema", "payload/digest", "audience", "payload", "accepted-at"
  ],
  "properties": {
    "schema/v": { "const": 1 },
    "delivery/kind": { "const": "member-visible" },
    "room/id": { "$ref": "room.v1.schema.json#/$defs/room_id" },
    "relay/epoch": { "type": "integer", "minimum": 1 },
    "relay/seq-no": { "type": "integer", "minimum": 1 },
    "sender/subject": { "$ref": "room.v1.schema.json#/$defs/subject" },
    "payload/class": {
      "type": "string",
      "enum": [
        "room-live", "sensorium-latest-state", "sensorium-status", "sensorium-claim",
        "sensorium-control", "sensorium-invoke", "sensorium-receipt"
      ]
    },
    "payload/schema": {
      "type": "string",
      "minLength": 3,
      "maxLength": 128,
      "pattern": "^[a-z][a-z0-9.-]*\\.v[0-9]+$"
    },
    "payload/digest": {
      "type": "string",
      "minLength": 16,
      "maxLength": 128,
      "pattern": "^sha256:[A-Za-z0-9_-]+$"
    },
    "audience": {
      "description": "Complete bounded recipient-admission set for this member-visible delivery. Every authorized recipient and the content-visible relay can inspect every entry; deployments requiring recipient-set confidentiality must use a sealed profile that does not expose this array.",
      "type": "array",
      "maxItems": 64,
      "uniqueItems": true,
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "recipient/ref", "admission/ref", "room-membership/source-seq-no", "expires-at"
        ],
        "properties": {
          "recipient/ref": { "type": "string", "minLength": 3, "maxLength": 512, "pattern": "^[^\\u0000-\\u001F\\u007F]+:[^\\u0000-\\u001F\\u007F]+$" },
          "admission/ref": { "type": "string", "minLength": 3, "maxLength": 512, "pattern": "^[^\\u0000-\\u001F\\u007F]+:[^\\u0000-\\u001F\\u007F]+$" },
          "room-membership/source-seq-no": { "type": "integer", "minimum": 1 },
          "expires-at": { "type": "string", "format": "date-time" }
        }
      }
    },
    "payload": { "type": "object", "additionalProperties": true },
    "accepted-at": { "type": "string", "format": "date-time" }
  },
  "allOf": [
    {
      "if": { "properties": { "payload/class": { "const": "sensorium-latest-state" } } },
      "then": { "properties": { "audience": { "minItems": 1 } } }
    }
  ]
}