https://github.com/kedro-org/kedro/issues/1160#issuecomment-1023966910 This is similar to what we want just the inverse, as OP wanted to save additional datasets when debugging and not when running normally. The difference for what I am looking for is that the base catalog.yml is always loaded, so we would have to explicitly, dataset by dataset, redefine them as MemoryDataSets right?