{
  "stages": ["DNS", "ROUTE", "TCP", "TLS", "PROXY", "BACKEND", "HTTP_RESPONSE"],
  "baseline": {"host": "api.lab.test", "address": "192.0.2.20", "status": 200},
  "faults": [
    {"name": "dns_error", "last_success": "DNS_QUERY", "failure": "DNS_NXDOMAIN", "excluded": "TCP_OR_LATER", "recovery": "EXPECTED_ADDRESS_RETURNED"},
    {"name": "syn_loss", "last_success": "ROUTE", "failure": "TCP_NO_SYN_ACK", "excluded": "TLS_OR_HTTP", "recovery": "HANDSHAKE_CONFIRMED_AT_BOTH_ENDS"},
    {"name": "pmtu_black_hole", "last_success": "TCP_SMALL_SEGMENT", "failure": "LARGE_SEGMENT_DROPPED_WITHOUT_ICMP", "excluded": "TOTAL_PATH_OUTAGE", "recovery": "SAME_LARGE_TRANSFER_COMPLETES"},
    {"name": "slow_backend", "last_success": "PROXY_FORWARD", "failure": "UPSTREAM_FIRST_BYTE_DELAY", "excluded": "DNS_TCP_TLS_DOMINATE", "recovery": "UPSTREAM_DELAY_REMOVED_AND_BASELINE_REPEATED"}
  ]
}