1. A system for automated attribute propagation and hierarchical consistency checking, the system comprising: a memory having computer readable instructions; and a processing device for executing the computer readable instructions, the computer readable instructions comprising: detecting a non-standard extension during convergence of an integrated circuit logic design; propagating the non-standard extension to each level of a plurality of hierarchies of the integrated circuit design for which a net utilizes a special constraint; and verifying a hierarchy consistency by checking the attribute propagation at each level of the plurality of hierarchies, performing an open access checking, and performing a post-layout netlist checking, and wherein an integrated circuit is manufactured using the integrated circuit design.