Real server error excerpts; filesystem locations redacted.
'          [cause]: Error: Contained ACP command was not found on PATH\n' +
'        [cause]: AcpTransportError: ACP transport operation failed: ACP agent did not advertise configured authentication method "xai.api_key".\n' +
'          [cause]: Error: {"configuredAuthMethodId":"xai.api_key","authMethods":[{"id":"grok.com","name":"Grok","description":"Sign in with Grok"}]}\n' +
'            [cause]: Error: spawn ~/bin/pi ENOENT\n' +