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saphidandClaude Opus 5.5
8aeeaef666
- Key check: ssh writes the key during the key exchange and is stopped at once;
no authentication, agent, forwarding, commands (-N), terminal or local
command, all forced ahead of ~/.ssh/config, and -F none unless a jump host
needs the config. A device accepting "none" gets nothing.
- accept-new only for a headset that never had an identity: the saved key's
fingerprint is recorded in devices.json, and a recorded identity, an
existing pin file or a connection that ever worked makes a deleted, empty,
unreadable or unparseable pin fail closed ("missing or can't be read").
- forget-identity is refused (it let the next contact save any key unseen).
- A key read before the headset's port, user or that address changed can't be
trusted.
- Without a ControlMaster (Windows) the handshake's stderr goes to a file read
as it grows, not a pipe.
- Pin files and the check's throwaway known_hosts get make_private.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>