Plutip heavily relies on local cluster testing framework from cardano-wallet.
Initially, framework was used as-is, but in order to add to Plutip ability to set slot length and epoch size, module Cluster.hs was copied from cardano-wallet to Plutip's codebase and adjusted to make this settings possible. So in case of updating cardano-wallet dependency be sure that original Cluster.hs and Plutip's one differs only in expected way.
At the moment all changes are related to adding ExtraConfig to necessary ADTs and functions in Plutip's version of Cluster.hs and difference with the original is pretty small.