On December 15, 2016, a feature was rolled back concerning Gists, GitHub's tool for sharing code snippets, notes, and other content. The update introduced the ability for users to change the visibility of their Gists between Public and Secret at any time without altering the URL, addressing a common issue where users inadvertently created Public Gists instead of Secret ones, and vice versa. The visibility toggle was designed to enhance user control over the privacy of their shared content, and further information on the distinctions between Public and Secret Gists is available in the Help documentation.