Is Kaspa's Groth16 proof verification quantum-safe?

No — Groth16 proof verification is not quantum-safe. The security of Groth16 is reduced when Shor's algorithm is applied; Shor's algorithm is a mathematical method that a sufficiently powerful quantum computer could use to undermine the cryptographic assumptions Groth16 depends on. This is a known limitation of the Groth16 scheme itself, not something specific to how Kaspa has implemented it. For most users today this is not an immediate concern, but it is worth knowing if you are evaluating Kaspa's long-term cryptographic posture as quantum hardware research continues.