sfになったから?
[10/12/23 13:26:49] Exception in task deploy_unmanaged.deploy
Error: Command exited with return code 127:
› Warning: @salesforce/cli update available from 1.67.1 to 2.12.9.
› Warning: force source convert is not a sf command.
I uninstalled the cli first then reinstalled due to similar issues. https://developer.salesforce.com/forums/?id=9065d0000007BlRAAU