How does Kaspa's OpZkPrecompile opcode allow new proof systems to be added without changing core code?

Kaspa's OpZkPrecompile uses a tag-based dispatch system so new zero-knowledge proof systems can be integrated simply by defining a new tag identifier, with no changes to the core opcode itself. The opcode reads a hexadecimal tag as its first argument and routes execution to whichever proof system that tag identifies; each proof system then defines its own argument structure that follows the tag. Because the generic verification interface is kept separate from the specific proof system implementations, the Kaspa network can adopt new cryptographic techniques over time while keeping existing precompiles working exactly as before — that is backward compatibility in practice. For a beginner, this means Kaspa's scripting layer is built to grow with advances in cryptography rather than requiring a disruptive protocol overhaul every time a better proof system becomes available.