debug block

Internal filler slot used heavily inside house templates. It often occupies room centers, wall bands, or decorative clusters where a structure needs a prearranged furnishing material but the final block depends on the decoration family.

Wood, concrete, and brick houses all lean on this placeholder, and the code-visible resources never expose it as an obtainable item source. In other words, it is a generator-owned interior marker, not a missing functional block.