This year's International Symposium on Highly Efficient Accelerators and Reconfigurable Technologies (HEART) took place near Kyoto on June 15 and 16. This 13th installment of the event marked its return to in-person attendance after a long stretch of remote operation. HEART connects a closely knit community of both research and industry actors focused on spreading specialized computing hardware to more domains and larger scales. In this context, programmability and innovative models of compute are considered the greatest current obstacles. In line with these challenges, Karl F. A. Friebel presented their work "Base2: An IR for Binary Numeral Types", which takes aim at reconfigurable targets using MLIR.