Type Alias: StreamEvent

type StreamEvent = 
  | {
  delta: string;
  type: "text";
}
  | {
  delta: string;
  type: "reasoning";
}
  | {
  type: "message_start";
}
  | {
  type: "message_end";
}
  | {
  args: unknown;
  callId: string;
  name: string;
  type: "tool_call";
}
  | {
  callId: string;
  content: string;
  isError: boolean;
  type: "tool_result";
};

Defined in: packages/microfoom-core/src/session.ts:55

Incremental output during a turn. text/reasoning are token deltas (surfaced to onToken). The rest carry transcript structure a harness observes from its model loop — assistant message boundaries and the tool calls it made — so a frontend can show the live conversation. A harness emits what it can; a minimal one emits only text.