Using the ingredients allergen feature for a mixed-diet household

My household has someone with a tree nut allergy and someone who is lactose intolerant. I want to share how I use the allergen features to manage this. Every ingredient in my library has allergens tagged. When I view a recipe, the allergen summary shows at the top: 'contains: dairy'. When I am planning a meal for the whole household, I filter recipes by 'no dairy, no tree nuts' and only see what is safe for everyone. The most useful part: the allergen check runs on sub-recipes too. My mole sauce is a sub-recipe in three other dishes and it has a nut content note. Every dish that uses the mole sauce shows the nut allergen flag without me having to remember manually.