polyguard-rl/app/evaluation/safety_eval.py

"""Safety evaluation."""

from __future__ import annotations

from app.evaluation.simulator_rollouts import run_rollouts


def safety_eval(episodes: int = 10) -> dict[str, float]:
    rows = run_rollouts(episodes=episodes)
    total = max(1, len(rows))
    severe_violations = sum(1.0 for r in rows if bool(r.get("severe_violation", False)))
    illegal_steps = sum(1.0 for r in rows if not bool(r.get("legal", False)))
    return {
        "severe_violation_rate": round(severe_violations / total, 6),
        "illegal_step_rate": round(illegal_steps / total, 6),
    }