$ sbx rm --force m101-secret
Deleting sandbox m101-secret...
Sandbox 'm101-secret' removed
[exit 0]

$ sbx secret rm --placeholder sk-<rand> -f
SCOPE      TARGETS            ENV          PLACEHOLDER           SECRET
(global)   api.example.test   M101_NAMED   sk-<rand>   m101-d*********
Deleted 1 custom secret(s) for placeholder "sk-<rand>" in scope "(global)"
Applied secret updates for <n> running sandbox(es)
[exit 0]

$ sbx secret rm --placeholder sbx-cs-<rand> -f
SCOPE      TARGETS                           ENV             PLACEHOLDER               SECRET
(global)   host.docker.internal, localhost   M101_RECV_KEY   sbx-cs-<rand>   m101-d**************0000
Deleted 1 custom secret(s) for placeholder "sbx-cs-<rand>" in scope "(global)"
Applied secret updates for <n> running sandbox(es)
[exit 0]

$ sbx secret ls
No secrets found. Run 'sbx secret set --help' to see available services.
[exit 0]