Variable: directMessageSchema

const directMessageSchema: ZodObject<{
  item_id: ZodOptional<ZodString>;
  item_type: ZodOptional<ZodString>;
  text: ZodOptional<ZodString>;
  timestamp: ZodOptional<ZodCoercedString<unknown>>;
  user_id: ZodOptional<ZodCoercedString<unknown>>;
}, $loose>;

One item in a direct thread. Lean and lenient: item_type distinguishes the payload (text, media, like, link, ...), so most fields are optional. Timestamps arrive as microsecond strings and are kept as strings.