Portable POSIX-sh purge of exactly the fleet's deletion-policy trash: a
root's own .AGENTTRASH is emptied in place (the convention survives),
deeper .AGENTTRASH trees are removed with their nested entries accounted
once, symlinked/foreign-owned candidates are refused, / is refused.
Dry-run by default; --execute performs the plan and appends one dated log
line; every printed line is fixed at plan time in the on-disk plan table,
so dry-run and execute output can never drift.
Documented in Operations/Payload and Disk Reclaim.md section 6 (one fact
one owner - no new vault page). Tests: 14 green, ./tests/run.sh 576 green.
Frank
a3c2465638