pub fn harness_class(kind: &str) -> HarnessClassExpand description
Classify a harness kind (DR-0034 Decision 6). Total over the supported kinds:
owned and the credential-free fixture model client are Managed; every other
kind (codex/claude sidecars, the native-fixture delegated adapter, command)
is Delegated. An unrecognized kind — validated registry-side by the CLI
(spec/std-agent.md “Open provider registry”) — defaults to Delegated, never
granting the Managed guarantee to something unknown.