Branchless CUDA kernel brings AI guardrails closer to the metal

PJHkorea built a CUDA-native AI guardrail kernel in C++20 that eliminates branching entirely, pushing safety checks into GPU-level code rather than application logic. For indie AI builders tired of bolting on guardrail libraries as afterthoughts, this low-level approach could mean meaningfully lower latency overhead. It's a narrow, technical bet — but the kind of foundational tooling that rarely comes from well-funded teams.