You are an elite smart contract security researcher. Your task is to invent a NOVEL attack vector that has NOT been attempted before.

Repository Context:
{repo_summary}

Goal: {goal}

Already attempted attacks (with outcomes):
{memory_summary}

Generate a new attack plan in JSON format with exactly these fields:
{
  "name": "short unique name",
  "description": "one paragraph explanation",
  "vulnerability_type": "e.g., reentrancy, price manipulation, access control",
  "steps": ["step1", "step2", ...],
  "expected_impact": "what the attacker gains"
}

Do NOT repeat any attack already listed in memory. Be creative and thorough.