Use cases
API integration engineer
You own PATCH clients for DNS settings. Use the dual-write tree before the Oct 26 rollout widens rejects, and update parsers for cloudflare.advanced.
Terraform platform engineer
Removing foundation_dns creates false→null perpetual drift. Use the TF deadlock module to stage ignore_changes with an expiry, then manage nameservers.type.
SDK / client maintainer
Closed enums that omit new type values break when rollout returns cloudflare.advanced. Widen enums and drop write serialization of foundation_dns.