Small surface
Public interfaces should exist for a reason. Internal control paths stay internal whenever possible.
SECURITY / OPERATING PRACTICE
Reduce the
unnecessary.
Security begins with understanding what a system exposes, why it is exposed, and who actually needs to reach it.
Clear boundaries
Services are easier to defend when their responsibilities and network boundaries are explicit.
Useful records
Operational logs should reveal meaningful changes without becoming an archive of unnecessary detail.
Recovery
Backups, rollback procedures and replaceable components are part of security because recovery is part of failure.