fusion/.changeset/FN-4813-multi-node-claim-mutex.md

@runfusion/fusion

@runfusion/fusion
patch

Add multi-node coordination hardening for task execution: distributed checkout claim mutex (tryClaimCheckout) with node/epoch preconditions, configurable owningNodeHandoffPolicy behavior for unavailable owners, and a supported transitionProjectIsolation path that can restart project runtimes (with rollback when active-task restart is blocked). Reaffirm scheduler failover and live process migration as explicit non-goals in mesh/multi-project docs.