$ t3 environment link --help

DESCRIPTION
  Link another T3 Code environment, so agents here can work there. It shows up there under Settings → Connections, where it can be revoked.

USAGE
  t3 environment link [flags] <url>

ARGUMENTS
  url string    Where the other environment answers: its T3 Connect, Tailscale, LAN or loopback address.

FLAGS
  --base-dir string        Explicit T3 Code data directory; runtime state is stored under userdata (equivalent to T3CODE_HOME).
  --dev-url string         Dev web URL to proxy/redirect to (equivalent to VITE_DEV_SERVER_URL).
  --url string             Another address for the same environment, tried after the first.
  --pairing-code string    A pairing code from the other environment (`t3 pair` there).
  --access choice          What this environment's agents may do there: read-only, or the broadest runtime mode. (choices: read-only, approval-required, auto-accept-edits, auto, full-access)

GLOBAL FLAGS
  --help, -h                                                          Show help information
  --version, -v                                                       Show version information
  --wizard                                                            Start wizard mode for a command
  --completions <bash|zsh|fish|powershell|sh|pwsh>                    Print shell completion script (choices: bash, zsh, fish, powershell, sh, pwsh)
  --log-level <all|trace|debug|info|warn|warning|error|fatal|none>    Sets the minimum log level (choices: all, trace, debug, info, warn, warning, error, fatal, none)

$ t3 environment unlink --help

DESCRIPTION
  Forget a linked environment here. Revoke it in that environment's Connections to end its session there too.

USAGE
  t3 environment unlink [flags] <environment-id>

ARGUMENTS
  environment-id string    The linked environment's id, from `t3 environment list`.

FLAGS
  --base-dir string    Explicit T3 Code data directory; runtime state is stored under userdata (equivalent to T3CODE_HOME).
  --dev-url string     Dev web URL to proxy/redirect to (equivalent to VITE_DEV_SERVER_URL).

GLOBAL FLAGS
  --help, -h                                                          Show help information
  --version, -v                                                       Show version information
  --wizard                                                            Start wizard mode for a command
  --completions <bash|zsh|fish|powershell|sh|pwsh>                    Print shell completion script (choices: bash, zsh, fish, powershell, sh, pwsh)
  --log-level <all|trace|debug|info|warn|warning|error|fatal|none>    Sets the minimum log level (choices: all, trace, debug, info, warn, warning, error, fatal, none)

$ t3 environment unlink <target-environment-id>

Forgot <target-environment-id>. Revoke it in that environment's Connections to end its session there.