Issue #35944 | AFTER-UP | 4e93602844861ac74b2a8be75ba29a474ef03a80
Linux x64 | Node v26.12.1 | real source CLI
Fresh isolated HOME / T3 home; service-manager buses disconnected.
No BootService stub; no extracted updater; no test runner.

$ node src/bin.ts up --no-lan --no-connect --base-dir <isolated-home>

BEFORE service.env:
CUSTOM="first
T3CODE_LAN=example
last"
T3CODE_LAN=true

CLI exit: 0
Remote access is off. Run `t3` to use T3 Code here.

AFTER service.env:
CUSTOM="first
T3CODE_LAN=example
last"
T3CODE_LAN=false

Parsed with node:util.parseEnv:
{
  "CUSTOM": "first\nT3CODE_LAN=example\nlast",
  "T3CODE_LAN": "false"
}

CUSTOM preserved: true
Own T3CODE_LAN entry is false: true

No service was installed; t3 up changed the saved LAN setting.