Shared (read-only) virtual-object / non-run workflow handler declarators.
json<I, O>() — type params, default JSON serde.
Optionalopts: DescriptorOptsOptionalopts: DescriptorOptsschemas({ input, output }) — Standard Schema per direction.
serdes({ input, output }) — explicit Serde per direction.
Optionalopts: DescriptorOptsOptionalopts: DescriptorOpts
The shape of the iface service-interface declaration API.