Epoch Rotation

Epoch rotation follows V4 epoch time and chain state. The cutover freezes CoreTex submissions, reveals the prior epoch secret, publishes post-reveal eval artifacts, verifies replay, evolves the corpus and frontier, recomputes the baseline for the current live root, signs and publishes rotation artifacts, pins V4 context, reads pins back, hot-reloads the coordinator, then unfreezes submissions.

The rotation path is journaled and idempotent. On restart, it resumes the same cutover steps and converges on one pinned epoch-start context.

The live root can advance many times inside an epoch. Baselines follow the current live root, and corpus or frontier rotation triggers a fresh baseline under the new pinned context.