While the checkpoint system is integrated into the codebase, it would typically be used through CLI commands (exact command syntax would depend on the CLI implementation):

# Save a checkpoint with a custom label
claude checkpoint save "Before major refactoring"

# List all checkpoints
claude checkpoint list

# Restore to a previous checkpoint
claude checkpoint restore <checkpoint-id>

The activity tracking and interactive mode detection work automatically in the background to provide better analytics and adapt behavior based on the execution context.