Are there any libraries to use with spec for preparing data to be run against a spec? For example, we want to evolve a spec with a required field to keep contracts strong, but knowing this won’t be compatible with old pre-existing stored data in the system. We’re considering declaring (via some library) a default for when that new key is missing, preparing the data w/ those defaults, so it will validate against the spec. I know this is possible via something like spec-tools coercers, but since coupling coercing w/ specs seems like it’s a known anti-pattern I assume using it for defaults in this way would be as well. This is kind of a round-about question about having strong specs for some places (think consumers vs producers), which I feel like is more of a solved thing in spec2 (use the select api to make certain things required in specific places), but without writing custom predicates I see no clear way to this (deeply) with the current version of spec.