{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:orbiplex:schema:middleware-channel-hello:v1",
  "title": "Middleware Channel Hello v1",
  "description": "Module-supplied consistency assertions and requested limits for one authenticated channel launch.",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "schema",
    "schema/v",
    "executor/id",
    "module/id",
    "component/id",
    "launch/instance-id",
    "contract/versions",
    "channel/features",
    "limits/requested"
  ],
  "properties": {
    "schema": {"const": "middleware-channel-hello.v1"},
    "schema/v": {"const": 1},
    "executor/id": {"$ref": "#/$defs/id"},
    "module/id": {"$ref": "#/$defs/id"},
    "component/id": {"$ref": "#/$defs/id"},
    "launch/instance-id": {"$ref": "#/$defs/id"},
    "contract/versions": {
      "type": "array",
      "minItems": 1,
      "maxItems": 1,
      "uniqueItems": true,
      "items": {"const": "v1"}
    },
    "channel/features": {
      "type": "array",
      "minItems": 1,
      "maxItems": 3,
      "uniqueItems": true,
      "items": {
        "type": "string",
        "enum": ["bidirectional-rpc", "cancellation", "heartbeat"]
      }
    },
    "limits/requested": {"$ref": "#/$defs/requestedLimits"}
  },
  "$defs": {
    "id": {
      "type": "string",
      "minLength": 1,
      "maxLength": 256,
      "pattern": "^[A-Za-z0-9][A-Za-z0-9._:/-]*$"
    },
    "requestedLimits": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "frame/max-bytes",
        "in-flight/host-to-module",
        "in-flight/module-to-host",
        "observer/queue-capacity"
      ],
      "properties": {
        "frame/max-bytes": {"type": "integer", "minimum": 4096, "maximum": 1048576},
        "in-flight/host-to-module": {"type": "integer", "minimum": 1, "maximum": 1024},
        "in-flight/module-to-host": {"type": "integer", "minimum": 1, "maximum": 1024},
        "observer/queue-capacity": {"type": "integer", "minimum": 1, "maximum": 65536}
      }
    }
  },
  "x-dia-basis": [
    "orbidocs:doc/project/40-proposals/080-multiplexed-middleware-channel-executor.md"
  ]
}