{
  "$schema": "../schema/test-vector.schema.json",
  "name": "Companion Protocol - Framing",
  "spec_ref": "src/18-companion-protocol.md",
  "protocol_version": 0,
  "description": "Tests companion protocol frame encoding: type byte followed by variable-length data.",
  "vectors": [
    {
      "id": "comp-001",
      "description": "CMD_APP_START (0x01) - no data",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "raw_custom",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 1,
          "hash_count": 0,
          "hashes": []
        },
        "payload": {
          "data": "01"
        }
      },
      "binary": "3D 00 01",
      "notes": "Companion command type 0x01 = CMD_APP_START. No payload data."
    },
    {
      "id": "comp-002",
      "description": "CMD_DEVICE_QUERY (0x02) - no data",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "raw_custom",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 1,
          "hash_count": 0,
          "hashes": []
        },
        "payload": {
          "data": "02"
        }
      },
      "binary": "3D 00 02"
    },
    {
      "id": "comp-003",
      "description": "CMD_SET_TIME (0x08) with timestamp",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "raw_custom",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 1,
          "hash_count": 0,
          "hashes": []
        },
        "payload": {
          "data": "08 00F15365"
        }
      },
      "binary": "3D 00 08 00F15365",
      "notes": "CMD_SET_TIME with timestamp 1700000000 = 0x6553F100 LE = 00F15365."
    }
  ]
}