Mintlify has released new feature improvements in October 2023, including a CLI upgrade with improved error handling, API Playground updates such as persisting authentication tokens and adding copy & download buttons, versioning stability improvements for teams with multiple products across different versions, and the ability to link multiple repositories to one documentation instance. These upgrades will be automatically applied to users' playgrounds and can be upgraded locally by running a specific CLI command. The company is continuing to work on more complex edge cases with versioning in the coming quarter. Users are encouraged to follow Mintlify's Twitter account for updates and request features through their Slack community.