Linux x86_64 | Node v26.12.1 | systemd 255 (255.4-1ubuntu8.18)
Commit e3815c14c9e77b862b43e24af85e745392f687f5
Real bundled CLI; isolated temporary user manager; synthetic executable fixture.
Fixture: --version prints t3 v0.1.9; otherwise runs sleep infinity.
No application database or provider used.

CASE plain | home basename "plain"
$ t3 service install --base-dir "/proof/20261113T043928/after/plain"
Service installed · t3@0.1.9
Log: /proof/20261113T043928/after/plain/userdata/logs/boot-service.log
Run `t3 up` to choose how your other devices reach it.
CLI exit: 0
Unit file written: true
$ systemd-analyze verify --user --man=no t3code.service

Verify exit: 0
$ systemctl --user show t3code.service --property=LoadState,ActiveState,SubState
LoadState=loaded
ActiveState=active
SubState=running

CASE space | home basename "T3 Data"
$ t3 service install --base-dir "/proof/20261113T043928/after/T3 Data"
Service installed · t3@0.1.9
Log: /proof/20261113T043928/after/T3 Data/userdata/logs/boot-service.log
Run `t3 up` to choose how your other devices reach it.
CLI exit: 0
Unit file written: true
$ systemd-analyze verify --user --man=no t3code.service

Verify exit: 0
$ systemctl --user show t3code.service --property=LoadState,ActiveState,SubState
LoadState=loaded
ActiveState=active
SubState=running

CASE percent | home basename "100%h"
$ t3 service install --base-dir "/proof/20261113T043928/after/100%h"
Service installed · t3@0.1.9
Log: /proof/20261113T043928/after/100%h/userdata/logs/boot-service.log
Run `t3 up` to choose how your other devices reach it.
CLI exit: 0
Unit file written: true
$ systemd-analyze verify --user --man=no t3code.service

Verify exit: 0
$ systemctl --user show t3code.service --property=LoadState,ActiveState,SubState
LoadState=loaded
ActiveState=active
SubState=running

CASE dollar | home basename "${UNSET}"
$ t3 service install --base-dir "/proof/20261113T043928/after/${UNSET}"
Service installed · t3@0.1.9
Log: /proof/20261113T043928/after/${UNSET}/userdata/logs/boot-service.log
Run `t3 up` to choose how your other devices reach it.
CLI exit: 0
Unit file written: true
$ systemd-analyze verify --user --man=no t3code.service

Verify exit: 0
$ systemctl --user show t3code.service --property=LoadState,ActiveState,SubState
LoadState=loaded
ActiveState=active
SubState=running

CASE double quote | home basename "T3 \"Data\""
$ t3 service install --base-dir "/proof/20261113T043928/after/T3 \"Data\""
ERROR
  systemd cannot run T3 Code from "/proof/20261113T043928/after/T3 \"Data\"": the path contains a quote, backslash or control character. Choose another T3 home with --base-dir.
CLI exit: 1
Unit file written: false
$ systemctl --user show t3code.service --property=LoadState,ActiveState,SubState
LoadState=not-found
ActiveState=inactive
SubState=dead

CASE single quote | home basename "it's"
$ t3 service install --base-dir "/proof/20261113T043928/after/it's"
ERROR
  systemd cannot run T3 Code from "/proof/20261113T043928/after/it's": the path contains a quote, backslash or control character. Choose another T3 home with --base-dir.
CLI exit: 1
Unit file written: false
$ systemctl --user show t3code.service --property=LoadState,ActiveState,SubState
LoadState=not-found
ActiveState=inactive
SubState=dead

CASE backslash | home basename "T3\\Data"
$ t3 service install --base-dir "/proof/20261113T043928/after/T3\\Data"
ERROR
  systemd cannot run T3 Code from "/proof/20261113T043928/after/T3\\Data": the path contains a quote, backslash or control character. Choose another T3 home with --base-dir.
CLI exit: 1
Unit file written: false
$ systemctl --user show t3code.service --property=LoadState,ActiveState,SubState
LoadState=not-found
ActiveState=inactive
SubState=dead

CASE newline | home basename "T3\nData"
$ t3 service install --base-dir "/proof/20261113T043928/after/T3\nData"
ERROR
  systemd cannot run T3 Code from "/proof/20261113T043928/after/T3\nData": the path contains a quote, backslash or control character. Choose another T3 home with --base-dir.
CLI exit: 1
Unit file written: false
$ systemctl --user show t3code.service --property=LoadState,ActiveState,SubState
LoadState=not-found
ActiveState=inactive
SubState=dead