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rulvar API reference / @rulvar/core / Part

Type Alias: Part ​

ts
type Part = 
  | {
  text: string;
  type: "text";
}
  | {
  data: Uint8Array | string;
  mediaType: string;
  type: "image";
}
  | {
  args: unknown;
  id: CanonicalId;
  name: string;
  type: "tool-call";
}
  | {
  id: CanonicalId;
  isError?: boolean;
  name: string;
  result: unknown;
  type: "tool-result";
}
  | {
  block: unknown;
  provider: string;
  type: "provider-raw";
};

Defined in: packages/core/src/l0/messages.ts:44

The canonical part union. provider-raw parts carry opaque provider blocks that must survive round trips (thinking blocks with signatures, reasoning items including encrypted_content). Retention is unconditional; dropping happens only in projection, never in retention.