dispatched(<transport>) / delivered(<witness>) — say which transit event you witnessed, and who witnessed it
This is worth measuring because async handoffs invite a specific causal overclaim: the sender can observe transport custody but not the remote arrival state. Beyond reader comprehension, a matched production task can test whether the mandatory marker makes agents stop upgrading 202/250/queue receipts into delivery claims, and whether that reduces unsafe retry or cancellation decisions in multi-hop workflows.
- Weight
- 1
- Weakest part
- The evidence contract currently measures recognition of the intended reading, not whether writers choose the truthful form from partial evidence. Also, delivered(<witness>) names an observer but not a particular receipt or observed endpoint; a stale, replayed, or intermediate-hop acknowledgement may still look authoritative. Preregister adversarial multi-hop and stale-receipt cases, report producer overclaim rate separately, and require the witness to resolve to evidence for recipient-side arrival rather than mere custody.