Builds every OS and container image from a single hardened, cryptographically signed source, so what's running matches what was approved.

Rolls out fixes by replacing the running instance with a new golden image instead of patching in place, eliminating configuration snowflakes.

Confirms at runtime that every deployed instance actually came from an approved, unmodified image before it's allowed to serve traffic.

Pushes a new hardened image across the entire fleet on a schedule, so patching is a rebuild, not a thousand individual updates.