Kevin Hammond proposed a mechanism to disable Leios quickly during a serious network problem without removing the required votes or enactment steps. This emergency route would allow the maxEndorserBlockTxsSize parameter to be set to zero in any epoch, while reactivation would remain subject to the standard notice and frequency rules. CAP-12 version 5 currently prohibits a zero value, meaning the existing ban would need to be reconciled with the proposed exception. The mechanism would also require written confirmation from the Linear Leios team, conformance tests across all node implementations, and shutdown and restart exercises on the Preview and Preprod test networks. Ratification and enactment would take at least one epoch, with the constitution and guardrails targeted for submission by November 25.
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