Real CLI → recording HTTP proxy → real Environment B server.
Synthetic names: Environment A and Environment B. Credentials suppressed.

Case: bare; exit 1
[23:54:30.572] ERROR (#2): PeerLinkError: That pairing code was created on Environment A, not on Environment B. Create the link on Environment B and paste its code here.

Observed requests:
[
  {
    "method": "GET",
    "path": "/.well-known/t3/environment",
    "containsLocalCode": false
  }
]

Case: lowercase and space-padded; exit 1
[23:54:32.042] ERROR (#2): PeerLinkError: That pairing code was created on Environment A, not on Environment B. Create the link on Environment B and paste its code here.

Observed requests:
[
  {
    "method": "GET",
    "path": "/.well-known/t3/environment",
    "containsLocalCode": false
  }
]