Reference
Rego policies
Writing Rego-based policies for Sigstore Policy Controller
CISA Secure Software Development Attestation Form (Draft)Ubuntu compatibilityDifferences between Chainguard Containers and Ubuntu third-party images
Secure Software Development Framework (SSDF) table, NIST SP 800-218Red Hat UBI compatibilityDifferences between Chainguard Containers and Red Hat UBI third-party images
Minimum attestation referenceschainctl Referencechainctl Reference Documentation