"""DELETED. The third signing scheme is gone; this tombstone refuses import.

The decision this module was waiting on is made: signed advertisements are the
detached Ed25519 ``SignedSnapshot`` in ``distinct_protocol.handshake``, and
request signing is the canonical scheme in ``distinct_agent.transport``. "Do
not ship three schemes across three repos." This file exists only because the
deletion was performed over a channel that can overwrite but not remove; treat
it as absent, and remove it whenever convenient.
"""

raise ImportError(
    "distinct_agent.auth was deleted; use distinct_protocol.handshake.SignedSnapshot"
)