case_id: EX_BUY_001
type: BUY
input_summary:
  data_status: "all_required_fields_ok"
  hard_filters: "pass"
  flow_rows: 20
  atr20_status: "OK"
  total_heat_pct: 5.5
  expected_edge: 2.1
expected_output:
  investment_action: "BUY"
  grade: "A"
  required_order_fields: ["account", "ticker", "limit_price", "quantity", "stop_price", "stop_quantity", "take_profit_price", "take_profit_quantity"]
  rule_ids_used:
    - "risk_policy.master_prohibitions"
    - "data_contract.data_completeness_gate"
    - "position_sizing.volatility_targeting"
    - "output_schema.buy_proposal_template.validation"