syntax = "proto3";

package codex.exec_server.relay.v1;

message RelayMessageFrame {
  uint32 version = 1;
  string stream_id = 2;
  uint32 ack = 3;
  uint32 ack_bits = 4;

  oneof body {
    RelayData data = 5;
    RelayAck ack_frame = 6;
    RelayResume resume = 7;
    RelayReset reset = 8;
    RelayHeartbeat heartbeat = 9;
  }
}

message RelayData {
  uint32 seq = 1;
  uint32 segment_index = 2;
  uint32 segment_count = 3;
  bytes payload = 4;
}

message RelayAck {}

message RelayResume {
  uint32 next_seq = 1;
}

message RelayReset {
  string reason = 1;
}

message RelayHeartbeat {}