at the time of writing
Used to indicate that a statement reflects the situation as of the moment the text is being written, often implying that things may change later.
At the time of writing, there has been no official announcement yet.
As of this writing, that information has not been confirmed.
A phrase composed of これ (this), を (object marker), 書いている (writing, progressive form of 書く), 時点 (point in time), and で (at). The literal meaning is 'at the point in time when (I) am writing this'.