simblocks run reads..yaml file in it is read; its keys work anywhere a material name does, here and in the command line runner.my_materials/*.yaml (each with a materials: mapping), optional curves in curves/<key>.csv, and files starting with _ are skipped. Create template writes _template.yaml with every field explained.@block functions: your own builders and closed-form answers. They appear in the Add menu and in Help. How to write one