{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://ulam.ai/schemas/frontier-math-rl/episode-3.0.json",
  "type": "object",
  "required": ["schema_version", "episode_id", "problem_id", "split", "episode_type", "reward_mode", "prompt", "submission_schema_ref", "policy_visibility"],
  "properties": {
    "schema_version": {"const": "3.0"},
    "episode_id": {"type": "string"},
    "problem_id": {"type": "string", "pattern": "^sample_(10|[1-9])$"},
    "split": {"enum": ["train", "dev", "eval"]},
    "episode_type": {"enum": ["exact_benchmark", "targeted_frontier_milestone", "full_frontier_task"]},
    "reward_mode": {"enum": ["exact_machine", "hybrid_expert_gated"]},
    "prompt": {},
    "submission_schema_ref": {"type": "string"},
    "policy_visibility": {"const": "public"}
  }
}