With no `.probe-identity`, the scrub kept the shell's WOW_USER, WOW_PASS
and WOW_CHAR in the environment, so the realm leg inherited WOW_CHAR and
`realm_select::smoke` refused it: the documented
`WOW_USER=… WOW_PASS=… WOW_CHAR=… scripts/smoke.sh` could never pass.
The account is resolved into the script's own variables first and each
leg passes it by name, so it now leaves the environment either way.
Verified: the scrub run alone with the account in the shell leaves only
WOW_HOST in a child's environment, with and without a declared identity.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
