In my local development environment for a Laravel project I have had Clockwork installed for a few years, and after an unrelated permissions issue recently noticed that the Clockwork folder is taking up more than 1GB of data from over 100,000 JSON files:
Not only is this almost 50% of this project's entire web root, but the earliest files are several years old.
What does Clockwork use these files for, and is it safe to delete them without affecting its functionality?

clockwork:clean, which took about 10 mins to run, solves the issue and the clockwork folder is now a much more sane 10MB.