Gravenreach began storing its highest rulings and sworn oaths in resonance-etched slabs later called Echo Tablets.
The intent was not merely archival.
The Tablets made judgment repeatable and enforceable, anchoring civic continuity in a medium designed to endure.

Over time, the Tablets became the true seat of authority.
A challenge to a ruling required more than argument.
It required proof that the record itself was incomplete.