integration/ was a grab-bag of the 4 Integration impls + their hook mechanics + a misfiled default. Group each integration with its own mechanics: integration/worldguard/ (WorldGuardIntegration + WorldGuardProtection/Building/Flags), integration/nexo/ (NexoIntegration + Nexo), integration/griefprevention/ (GriefPreventionIntegration + GriefPreventionBuilding — fix the GriefPrevenention typo), integration/treasury/ (TreasuryIntegration). integration/ root keeps just the Integration interface + IntegrationRegistrar. VanillaShopProtection is ChestShop's own always-on default protection (used by ProtectionService), not a soft-dep integration — move it to services/.