Sanity can refer to different things depending on the context. Here are some possible meanings:

• Sanity.io: It is a modern headless CMS (Content Management System) that uses structured content to endlessly re-use content across any channel and a composable approach to help businesses connect to any. With Sanity, you can manage your text, images, and other media with APIs, and use the open-source single page application Sanity Studio to quickly set up an editing environment that you can customize.

• Sanity (mental health): It refers to the soundness, rationality, and health of the human mind, as opposed to insanity. A person is sane if they are rational and have the ability to think and behave normally and reasonably. In criminal and mental health law, sanity is a legal term denoting that an individual is of sound mind and therefore can bear legal responsibility for their actions.

In summary, sanity can refer to a modern headless CMS or the soundness, rationality, and health of the human mind.