Function extractPrompt

packages/opencode-atomic-hooks/src/handlers/chat.ts:243–250

(parts: MessagePart[])

 * @returns The combined prompt text, or `undefined` if empty
 */
export function extractPrompt(parts: MessagePart[]): string | undefined {
  const texts = parts
    .filter((p) => p.type === "text" && typeof p.text === "string")
    .map((p) => p.text as string);

  const combined = texts.join("\n").trim();
  return combined.length > 0 ? combined : undefined;
}