text: "Explain event sourcing in one sentence.Your parent agent id is \"session-{{uuid}}\". Before you finish, send your result to that agent with send_message({ agent_id: \"session-{{uuid}}\", message: \"\" }). The parent shares your workspace but does not automatically receive your transcript, tool output, or reasoning. Send earlier messages as well when a finding changes what the parent should do next; sending a message does not end your turn. {{clock}}"