Hi, I've removed Magritte's description caching in the latest version so that descriptions are now created dynamically on demand. Without the cache I found I needed to guard against recursive descriptions and ended up using a dynamic-variable as a temporary cache to break the recursion. I had to modify one test to avoid a failure: MADescriptionBuilderTest>>testRecursive self assert: self magritteDescription children first reference = self magritteDescription The failure was caused by the child descriptions both having null accessors which use random UUIDs so will never be equal. I fixed this by specify an accessor: "accessor: MADictionaryAccessor new;" I've created a Magritte-Deprecated package which contains: MADescriptionBuilder MANamedBuilder MAProxyObject MADynamicObject MADynamicObjectTest Also the following package extension methods have been placed in deprecated: Object>>#description Object class>>#description BlockClosure>>#magritteDynamicObject BlockContext>>#magritteDynamicObject and I've removed all references to #magritteDynamicObject and the associated block in the core Magritte packages. Nick