Why does Kaspa's GHOSTDAG store Anticone size alongside blue blocks?

GHOSTDAG records Anticone size data with every blue block so the protocol has the information it needs to classify future blocks consistently. When a block is marked blue — meaning it is part of the consensus — GHOSTDAG does not just note that fact and move on; it also stores a size measurement called the Anticone that will be consulted when the next round of classification decisions is made. Red blocks, by contrast, need no such tracking and are simply added to the red list. For a beginner, the takeaway is that Kaspa's protocol is doing careful bookkeeping behind the scenes so that every new block can be fairly evaluated against the same criteria, no matter how fast blocks are arriving.