// Package mode provides a domain-local ACL mode indicator readable by
// packages that need to know the current access control mode without
// circular dependencies.
package mode

// ACLMode holds the current ACL mode. Plain variable — single
// cooperative thread per domain, no atomic needed.
var ACLMode []byte

// IsOpen returns true if the ACL mode is "none" (open relay mode).
func IsOpen() bool {
	return len(ACLMode) == 4 &&
		ACLMode[0] == 'n' && ACLMode[1] == 'o' &&
		ACLMode[2] == 'n' && ACLMode[3] == 'e'
}