GRPO & RLVR Training This skill assumes already routed here because the target behavior has a verifiable pass/fail signal — not demonstrations ( ) or preference pairs ( ). What follows is when RL is the right tool, the reference recipe, the mandatory reward-inspection gate, and how to pick a GRPO variant when the base recipe misbehaves. Input: a routing decision (RLVR via GRPO) plus a verifier (code executor, test suite, schema checker, or grader) for the target task. Output format: a validated GRPO config — the kwarg values in and the reward functions in , not free-form advice — that consume…