On April 30, 2026, Cloudflare shipped cloudflare-typescript v6.0.0. The release notes call it a "major version" with "breaking changes to the generated API surface" — accurate but understated. Two specific changes in the SDK infrastructure section will silently break code that compiled and tested fine on v5: 133 methods now return null instead of a typed response object. Most are deletes, but the list also includes some create , update , and get operations across accounts , cache , d1 , filters , firewall , hyperdrive , iam , kv , logpush , logs , r2 , stream , workers , zero-trust , and zones . Responses with content-length: 0 now return undefined instead of attempting to parse the body. Anywhere the server returned an empty 200/204, the SDK used to hand you back an empty object. Now you get undefined . Both are documented. Neither is loud at runtime.…