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D-3 模式A影子下单(spec §5): - bridge_client.py: QMT bridge HTTP客户端(urllib, X-Bridge-Token, 失败不抛返回None) - live_orchestrator: _shadow_trades_to_bridge 当日成交POST bridge(默认enabled=false) - persistence: paper_shadow_orders幂等表+save_shadow_order/is_trade_shadowed - config: data_platform.yaml加live段, token走env(BRIDGE_TOKEN) - to_bridge_code symbol转换与guess_exchange一致(2位前缀) 安全: enabled=false默认关+token走env+幂等防重复+影子失败不阻断live_step docs: phase3d-live-trading-design.md(D期完整设计)