CURRENT_RULES is stamped on the start line and the game state, and a ledger replays under the revision it recorded (1 when it has none), so a future fix that changes how a past turn resolves can keep the old path for old duels. The reports desk skill now says when to bump it: only when the deploy gate flags ledgers. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_0141G6xqLeNRYEtviLWSB5Up