Config Backup
Domain: Configuration
Motivation
Saving a copy of config.yaml before making changes. Useful for rollback.
Concrete Example
cp config.yaml config.yaml.bak. Make changes. If things break: cp config.yaml.bak config.yaml. Back to working state.
Analogy
Backing up your phone before an update - if the update fails, you restore the backup. Config backup saves your settings before changes.