Size of the artifact in bytes.
OptionalheightPixel height when the artifact is an image.
IANA media type, such as image/svg+xml.
Reference the caller can cite: the path or id the sink returned.
OptionalroleWhat the artifact is to the run, such as csv, plan or summary.
OptionaluriAddress a client can open to fetch the artifact; opaque to octools.
OptionalwidthPixel width when the artifact is an image.
Where one produced artifact lives and what it is.