The Spool Protocol serves as DeFi middleware and aggregator. It allows users to participate in a subset of yield generating protocols in a risk diversified and algorithmically efficient fashion. The protocol allocates users' investments according to their preferences of strategy and risk, and rebalances them according to changing risk and yield data. Spool is controlled by its DAO via off-chain, Snapshot voting, and executes that on-chain through a treasury multisig Safe. Its 1.0 version, PreSpool, is also presented here for its Snapshot decisions.