R-TLS-01/docs/08 govern externally reachable TLS and ADR-0006 puts workload mTLS out of scope, but tls-lifecycle-automated required ACME for every Certificate, which platform/buildkit's internal CA cannot satisfy. Clause (5b) accepts the tls-scope=workload-mtls annotation only when the certificate proves it: no Gateway serves it, internal names only, namespaced selfSigned/ca issuer backed by an exempt CA certificate. Also fixes yamllint comma spacing in the buildkitd mounts. Co-Authored-By: Claude Opus 5.5 <[email protected]>