Rationale
A transcript is one worker's past; the next worker needs the present. Every record with computed front matter refuses identity fields precisely so that prose cannot pose as state.
Required behaviour
No record stores or summarises a conversation; records carry what is true now and the next action.
Failure behaviour
No command decides this rule; a reviewer does, and a change that violates it is not merged. Where a behavioural case covers part of it, that case is named below.
Verification
Review. test/cases/05_handover.sh and test/cases/20_checkpoint.sh refuse identity fields in an authored body.