AllInstancesHistory returns the path where all instances' history is, relative to given base directory.

InstanceHistory returns the path where the *specified* instance (given by its instance ID) is.

DefaultBaseDirectory is the root directory in which other paths are based upon.

HistoryJSON is the filename of the per-instance persisted history state, used to store on disk.

InitTOML is the filename of the configuration for ec2-macos-init.