from __future__ import annotations

from typing import Dict

from .dsl import LocalProblem, PlanDelta


def verify_plan(local_problem: LocalProblem, plan_delta: PlanDelta) -> bool:
    """Lightweight safety verification hook.

    This is a minimal, deterministic verifier for the MVP:
    - If the plan delta carries a non-negative 'safe_buffer', and the local
      problem's risk_budget is compatible, accept the plan.
    - Otherwise, reject.
    This should be replaced with real formal verification hooks in a full build.
    """
    buf = plan_delta.delta.get("safe_buffer", 0.0)
    try:
        risk = float(local_problem.risk_budget)
    except Exception:
        risk = 0.0

    # Basic rule: safe if buffer does not exceed the risk budget.
    return float(buf) <= max(0.0, risk)