OptionalcomputeThe compute resource the job ran on, when observed.
OptionalfinishedJoin overlay: extra parents merged by a ts node. Empty for ordinary nodes.
OptionaloutputAnchor parent (single previous_id); null at a feed root.
Topology signature — equal signatures mark isomorphic subtrees (status excluded).
OptionalstartedISO execution start/end and output bytes, when the cache observed them.
Status snapshot at build time; null when not yet observed.
One node of a feed DAG, as it crosses the wire to a surface.