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01_bootstrap.sh pins the five swarm nodes into the shared cache network at 200 + INFINITO_INSTANCE * 5. That band fits a /24 only for instances 0 to 10; from instance 11 on the script aborted with "pushes the node band past ...254", so no worktree past slot 10 could start a swarm cluster while the package cache runs. Five nodes per slot cannot fit 255 slots in one /24 with any fixed formula. Instances whose band fits keep their pinned addresses, so the primary checkout and CI behave as before. Above that, the nodes join the cache network without --ip and Docker assigns them from its pool (the upper half of the subnet), the same way every worktree stack container joins it. Nothing in the repository reads the nodes' cache-network addresses. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>