Find foods to log or cook with: the person's own foods (library mine, the default; search it before making a new food), generic ingredients such as eggs, broccoli or rice (library composition, three characters or more), and packaged products by name, brand or barcode (libraries splot and off). This only searches. Pass a result's library and key exactly as food in create_meal, update_meal or a recipe ingredient. Use a short, specific query; if nothing matches, try a simpler query or another library, then ask for the label or offer a clearly marked estimate rather than searching again. A missing match says nothing about ingredients, nutrition or allergy safety.