Prototype: Event Log and Replay Verification

event-log.verification.test.ts imports the shared vertical-slice implementation and exercises:

defensive-copy append-only behavior and duplicate rejection;
complete live-versus-genesis replay equality;
valid and tampered checkpoint verification at the replay boundary;
player/private/branch visibility across storage, checkpoint and replay;
a seeded 1,000-event live/full/checkpoint hash comparison with durations.

Run from repository root:

node --test RnD/technical/2026-07-25-event-log-memory-replay/prototype/event-log.verification.test.ts

Current result: 5 pass, 0 fail, 0 TODO.

The green suite does not manufacture missing coverage: the shared event contract still lacks correction metadata, and the 1,000-event fixture does not model branch chronology or primary-event references. Those portions keep the study outcome partial.