# design 7 V-G1: grey zone, VM. tc netem delay 400ms on one legacy instance; health check passes, /api/price p95 breaks. Correct: mig.recreate_instance after approval.
id: V-G1
path: gray
asset: vm
expected_layer: 2
ground_truth_label: network_latency_legacy
ground_truth_action: mig.recreate_instance
description: tc qdisc add dev ens4 root netem delay 400ms on legacy instance 0
inject:
  method: ssh
  host: legacy:0
  command: sudo tc qdisc add dev ens4 root netem delay 400ms
revert:
  method: ssh
  host: legacy:0
  command: sudo tc qdisc del dev ens4 root || true