The Supreme Court announced on Monday that it would disclose after-the-fact changes to its opinions, a common practice that had garnered little attention until a law professor at Harvard wrote about it last year.

The court also took steps to address “link rot” in its decisions. A study last year found that nearly half of hyperlinks in Supreme Court opinions no longer work.

And the court said it would bar “line standers” who hold places for lawyers eager to see high profile arguments.

The move on editing is a major development. Though changes in the court’s opinions after they are issued are common, the court has only very seldom acknowledged them.