OptionaltagOptionalvisibilityWhen the mutation becomes visible to subsequent queries. The engine
reads its own writes back through GROQ (fetch) — a freshly-spawned
child listed by id, a just-deployed definition — so single-document
writes (create, patch().commit()) commit 'sync': the change is
query-visible before the call resolves and the next read can't miss it.
@sanity/client already defaults to 'sync', but the engine states it
rather than depend on a transport default a consumer's client config
could change underneath it. (Transactions ride that same default — see
WorkflowTransaction.commit.)
Request tag for request-log attribution — see WorkflowFetchOptions.tag; not the workflow-domain deployment tag. The engine stamps every write with an operation-scoped
workflow.*tag.