How does DAGKNIGHT automatically determine the right k value?

DAGKNIGHT finds the right k value on its own by testing every candidate and picking the smallest one that passes a coverage threshold. In a blockDAG, k controls how tightly grouped parallel blocks need to be to count as a valid cluster — a k-cluster. DAGKNIGHT runs through each possible k value, finds the largest k-cluster that exists in the current DAG for that k, and then selects the smallest k where that cluster contains at least 50% of all blocks in the DAG. For a beginner, the practical takeaway is that DAGKNIGHT adjusts itself to real network conditions rather than requiring anyone to hard-code a parameter in advance, which makes the protocol more resilient as block rates or network topology change.