EVENT CONTRACT DECISION WORKSHEET
Status: proposed; requires application-specific evidence
Owner: assign consuming behavior owner
Record: supported writer versions and replay range; allowed live and rollback readers
For each field: meaning, unit, identity scope, absence meaning and source of truth
Attach: representative payloads for each reader/writer pair
Gate 1: decode result
Gate 2: interpreted values compared with intended historical meaning
Gate 3: permitted downstream action
Choose: additive evolution / deterministic reader translation / separately versioned stream
If separate stream: overlap, consumer transition and business-action identity
Rollback: compatible reader or explicit containment procedure
Revisit: longer replay range, independent external consumers, new irreversible action