What is DK and how does it relate to GHOSTDAG?

DK is a next-generation consensus protocol being developed for Kaspa that builds directly on top of GHOSTDAG — GHOSTDAG is actually a subprocedure (a component) inside DK. Kaspa's research roadmap calls for implementing DK as a consensus upgrade on the existing Rust codebase, reusing rather than replacing GHOSTDAG's proven code. For a beginner, this matters because it shows that GHOSTDAG was not a dead end but a deliberate building block for more advanced consensus research.