{
    "id": "coa-fs-2026-08-31-001",
    "base": "COA-D-20260831-001",
    "date": "2026-08-31",
    "type": "COA Fuel Signal",
    "version": "1.0",
    "city": {
        "name": "札幌",
        "role": "Consumption"
    },
    "delta": {
        "price": "up",
        "supply": "down",
        "pressure": "up",
        "lag": "up",
        "silence": "down"
    },
    "trigger": {
        "type": "C",
        "label": "供給ショック再点火"
    },
    "decision": {
        "replenish": "stagger",
        "stock": "+2",
        "risk": "high"
    },
    "silent": "down"
}