$ claude --print --output-format stream-json --append-system-prompt 'You are a worker...' 'Fix the login bug'
{"type":"assistant","message":{"content":"I'll fix the login bug..."}}
{"type":"result","subtype":"success","session_id":"a1b2c3d4-e5f6-7890-abcd-ef1234567890"}
__AGENTIC_TEAM_EXIT__=0
$
