Function appendText

packages/llm/test/lib/tool-runtime.ts:112–128

(
  content: ContentPart[],
  type: "text" | "reasoning",
  text: string,
  providerMetadata?: ProviderMetadata,
)

}

const appendText = (
  content: ContentPart[],
  type: "text" | "reasoning",
  text: string,
  providerMetadata?: ProviderMetadata,
) => {
  const last = content.at(-1)
  if (last?.type === type) {
    content[content.length - 1] = {
      ...last,
      text: `${last.text}${text}`,
      providerMetadata: providerMetadata ?? last.providerMetadata,
    }
    return
  }
  content.push({ type, text, providerMetadata })
}

const addUsage = (left: Usage | undefined, right: Usage | undefined): Usage | undefined => {
  if (!left) return right