From 5a91be2efd43357a445c01a13b4054a47dae4985 Mon Sep 17 00:00:00 2001
From: claude_dev <claude-dev@sanguo.local>
Date: Wed, 19 Aug 2026 22:22:42 +0800
Subject: [PATCH] =?UTF-8?q?fix(strategy):=20A1=20=E5=8D=96=E5=87=BA?=
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2026-08-19 盘后实锤:8路实盘共享miniQMT账户66639661,context.portfolio是
全账户视图→'卖掉所有不在目标里的持仓'卖掉别家持仓(518880/600036双实例
各卖当日真实发生)。spec: docs/design/multi-strategy-instance-budget-spec.md

- _get_positions(context, broker=None)(all_weather共享helper+all_weather_ex
  同构副本):broker.get_instance_positions存在(runner_live注入台账,dae56e2)
  →只返回本实例持仓(_InstancePosition:数量/成本取台账,price/value从共享
  视图同名标的补=市场数据非所有权);否则回测/影子原context.portfolio不变,
  模拟盘零改动;通道返非dict→TypeError fail-fast(回退=互卖,宁可崩)
- 视图空dict→轮换退化'只买不卖'(spec:正确行为不是bug)
- 逐个卖出腿过一遍(spec清单):channel_test rotate/partial_adjust/swap_one/
  t1_probe、momentum/_ex熊市清仓+调仓+买入去重、small_cap/_ex _rebalance、
  value_selection/_ex月度卖出、all_weather/_ex prepare/stop_loss/monthly
- 附带修:channel_test加仓腿市值未知时跳过,绝不order_target_value(code,0)
  把加仓变清仓
- 测试:test_instance_view_isolation.py 14条(helper5+channel_test5+momentum
  熊市2+small_cap1+all_weather止损1),含'实例视图空→零卖出'×3策略;
  strategy 126全绿;A2属性清单已发issue#29给前后端(B2虚拟化输入)
- 注:工作树另有前后端session未提交WIP(routes_live.py B3预算),不混入本commit

[vps]
---
 sanguo_portfolio/strategies/all_weather.py    |  69 ++++-
 sanguo_portfolio/strategies/all_weather_ex.py |  69 ++++-
 sanguo_portfolio/strategies/channel_test.py   |  18 +-
 .../strategies/momentum_timing.py             |   6 +-
 .../strategies/momentum_timing_ex.py          |   6 +-
 sanguo_portfolio/strategies/small_cap.py      |  12 +-
 sanguo_portfolio/strategies/small_cap_ex.py   |  12 +-
 .../strategies/value_selection.py             |   6 +-
 .../strategies/value_selection_ex.py          |   6 +-
 .../portfolio/test_instance_view_isolation.py | 258 ++++++++++++++++++
 10 files changed, 416 insertions(+), 46 deletions(-)
 create mode 100644 tests/portfolio/test_instance_view_isolation.py

diff --git a/sanguo_portfolio/strategies/all_weather.py b/sanguo_portfolio/strategies/all_weather.py
index 40cd2c7..ab8c294 100644
--- a/sanguo_portfolio/strategies/all_weather.py
+++ b/sanguo_portfolio/strategies/all_weather.py
@@ -135,7 +135,7 @@ class AllWeatherStrategy:
     # =================== prepare_stock_list ===================
     def prepare_stock_list(self, context: Any) -> None:
         """刷新 g.hold_list + g.yesterday_HL_list(持仓中昨日涨停的)。"""
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         self.hold_list = list(positions.keys())
         self.yesterday_hl_list = []
 
@@ -161,7 +161,7 @@ class AllWeatherStrategy:
     # =================== stop_loss ===================
     def stop_loss(self, context: Any) -> None:
         """昨日涨停打开则卖出;持仓 price < avg_cost*0.92 止损;补仓最多 N 只。"""
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         num_sold = 0
         now_time = _current_dt(context)
 
@@ -242,7 +242,7 @@ class AllWeatherStrategy:
 
         # 4) 过滤涨停/跌停/停牌(P1.3 批量预取:一次查三 filter 共享,原逐 filter
         #    不传 status_map/date → 全部走"无数据保留"死分支,照买涨停照交易停牌)
-        pos_keys = list(_get_positions(context).keys())
+        pos_keys = list(_get_positions(context, self.broker).keys())
         status_map = self._get_limit_status(target, current_dt)
         target = filters.filter_limitup_stock(
             target, self.provider, positions=pos_keys, status_map=status_map
@@ -256,7 +256,7 @@ class AllWeatherStrategy:
         target = _dedup(target)
 
         # 5) 调仓:先清掉不在 target 的(除昨日涨停)
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         for stock in list(positions.keys()):
             if stock in target or stock in self.yesterday_hl_list:
                 continue
@@ -264,7 +264,7 @@ class AllWeatherStrategy:
         # 卖出后重取:聚宽原版卖出后持仓同步更新,若沿用卖出前快照,
         # 持仓数≥目标数的换仓月 target_num>position_count 恒 False → 一股不买,
         # 空仓躺到下月(2025-09-01/12-01 NAS 实测)
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
 
         # 6) 买入 target 里的新股
         position_count = len(positions)
@@ -275,7 +275,7 @@ class AllWeatherStrategy:
                 if stock in positions:
                     continue
                 if self._open_position(stock, cash):
-                    positions = _get_positions(context)  # 刷新
+                    positions = _get_positions(context, self.broker)  # 刷新
                     if len(positions) >= target_num:
                         break
         logger.info("monthly_adjustment 结束: target=%s", target)
@@ -501,7 +501,62 @@ class AllWeatherStrategy:
 
 
 # ======================== context 适配 ========================
-def _get_positions(context: Any) -> Dict[str, Any]:
+class _InstancePosition:
+    """实例账本视图标的(轻量 jq Position)。
+
+    数量/成本来自实例台账(LiveInstanceLedger.positions_view);现价/市值从
+    共享组合视图**同名标的**补——行情是市场数据不是所有权,别家持仓不含在内。
+    共享视图缺该标的(快照缺口)→ price None / value 0.0,调用方自行降级。
+    """
+
+    __slots__ = ("security", "total_amount", "amount", "closeable_amount",
+                 "avg_cost", "price", "last_sale_price", "value")
+
+    def __init__(self, symbol: str, info: Dict[str, Any], real: Any) -> None:
+        self.security = symbol
+        self.total_amount = self.amount = int(info.get("amount", 0))
+        self.closeable_amount = int(info.get("closeable_amount", 0))
+        self.avg_cost = float(info.get("avg_cost", 0.0))
+        self.price = _pos_price(real) if real is not None else None
+        self.last_sale_price = self.price
+        self.value = _pos_value(real) or 0.0
+
+
+def _pos_value(pos: Any) -> Optional[float]:
+    """从 position 对象取市值,兼容多种属性名;取不到返回 None。"""
+    for attr in ("value", "market_value", "total_value"):
+        v = getattr(pos, attr, None)
+        if v is not None:
+            return float(v)
+    return None
+
+
+def _get_positions(context: Any, broker: Any = None) -> Dict[str, Any]:
+    """策略持仓视图(卖出/持仓判断的唯一入口,magic number 铁律)。
+
+    - broker 带 ``get_instance_positions``(实盘 runner_live 注入实例账本,
+      dae56e2)→ 只返回**本实例**的持仓:共享 QMT 账户下别家策略/手动持仓
+      绝不进卖出名单(2026-08-19 互卖事故根治,spec §A1)。视图空 = 本实例
+      无持仓 → 轮换退化为"只买不卖"(正确行为,不是 bug)。
+    - 否则(回测/影子/单测)→ 原 context.portfolio.positions 逻辑不变。
+    """
+    shared = _shared_positions(context)
+    fn = getattr(broker, "get_instance_positions", None) if broker is not None else None
+    if fn is None:
+        return shared
+    view = fn()
+    if not isinstance(view, dict):
+        raise TypeError(
+            f"get_instance_positions 返回非 dict: {type(view).__name__}(通道损坏,"
+            f"fail-fast 不回退共享视图——回退=互卖)"
+        )
+    return {
+        sym: _InstancePosition(sym, info, shared.get(sym))
+        for sym, info in view.items()
+    }
+
+
+def _shared_positions(context: Any) -> Dict[str, Any]:
     """聚宽 context.portfolio.positions,兼容 dict / list / 对象。"""
     if context is None:
         return {}
diff --git a/sanguo_portfolio/strategies/all_weather_ex.py b/sanguo_portfolio/strategies/all_weather_ex.py
index 5f74b9e..0a80670 100644
--- a/sanguo_portfolio/strategies/all_weather_ex.py
+++ b/sanguo_portfolio/strategies/all_weather_ex.py
@@ -53,6 +53,10 @@ class BrokerFacade:
     set_order_cost: Callable[[Any, str], None] = lambda cost, type: None
     run_daily: Callable[..., None] = lambda *a, **kw: None
     run_monthly: Callable[..., None] = lambda *a, **kw: None
+    # 实例持仓通道(2026-08-19 共享QMT账户互卖根治,spec §A1):live 时
+    # runner_live 注入 ledger.positions_view;回测/无台账为 None → 回退
+    # context.portfolio。与 all_weather.BrokerFacade 保持同构(副本契约)。
+    get_instance_positions: Optional[Callable[[], Dict[str, Dict[str, Any]]]] = None
 
 
 # ------------------------ 策略 ------------------------
@@ -134,7 +138,7 @@ class AllWeatherExStrategy:
     # =================== prepare_stock_list ===================
     def prepare_stock_list(self, context: Any) -> None:
         """刷新 g.hold_list + g.yesterday_HL_list(持仓中昨日涨停的)。"""
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         self.hold_list = list(positions.keys())
         self.yesterday_hl_list = []
 
@@ -160,7 +164,7 @@ class AllWeatherExStrategy:
     # =================== stop_loss ===================
     def stop_loss(self, context: Any) -> None:
         """昨日涨停打开则卖出;持仓 price < avg_cost*0.92 止损;补仓最多 N 只。"""
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         num_sold = 0
         now_time = _current_dt(context)
 
@@ -241,7 +245,7 @@ class AllWeatherExStrategy:
 
         # 4) 过滤涨停/跌停/停牌(P1.3 批量预取:一次查三 filter 共享,原逐 filter
         #    不传 status_map/date → 全部走"无数据保留"死分支,照买涨停照交易停牌)
-        pos_keys = list(_get_positions(context).keys())
+        pos_keys = list(_get_positions(context, self.broker).keys())
         status_map = self._get_limit_status(target, current_dt)
         target = filters.filter_limitup_stock(
             target, self.provider, positions=pos_keys, status_map=status_map
@@ -255,7 +259,7 @@ class AllWeatherExStrategy:
         target = _dedup(target)
 
         # 5) 调仓:先清掉不在 target 的(除昨日涨停)
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         for stock in list(positions.keys()):
             if stock in target or stock in self.yesterday_hl_list:
                 continue
@@ -263,7 +267,7 @@ class AllWeatherExStrategy:
         # 卖出后重取:聚宽原版卖出后持仓同步更新,若沿用卖出前快照,
         # 持仓数≥目标数的换仓月 target_num>position_count 恒 False → 一股不买,
         # 空仓躺到下月(2025-09-01/12-01 NAS 实测)
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
 
         # 6) 买入 target 里的新股
         position_count = len(positions)
@@ -274,7 +278,7 @@ class AllWeatherExStrategy:
                 if stock in positions:
                     continue
                 if self._open_position(stock, cash):
-                    positions = _get_positions(context)  # 刷新
+                    positions = _get_positions(context, self.broker)  # 刷新
                     if len(positions) >= target_num:
                         break
         logger.info("monthly_adjustment 结束: target=%s", target)
@@ -500,7 +504,58 @@ class AllWeatherExStrategy:
 
 
 # ======================== context 适配 ========================
-def _get_positions(context: Any) -> Dict[str, Any]:
+class _InstancePosition:
+    """实例账本视图标的(轻量 jq Position),与 all_weather 同构(副本契约)。
+
+    数量/成本来自实例台账;现价/市值从共享组合视图同名标的补(市场数据
+    非所有权);共享视图缺该标的 → price None / value 0.0,调用方自行降级。
+    """
+
+    __slots__ = ("security", "total_amount", "amount", "closeable_amount",
+                 "avg_cost", "price", "last_sale_price", "value")
+
+    def __init__(self, symbol: str, info: Dict[str, Any], real: Any) -> None:
+        self.security = symbol
+        self.total_amount = self.amount = int(info.get("amount", 0))
+        self.closeable_amount = int(info.get("closeable_amount", 0))
+        self.avg_cost = float(info.get("avg_cost", 0.0))
+        self.price = _pos_price(real) if real is not None else None
+        self.last_sale_price = self.price
+        self.value = _pos_value(real) or 0.0
+
+
+def _pos_value(pos: Any) -> Optional[float]:
+    """从 position 对象取市值,兼容多种属性名;取不到返回 None。"""
+    for attr in ("value", "market_value", "total_value"):
+        v = getattr(pos, attr, None)
+        if v is not None:
+            return float(v)
+    return None
+
+
+def _get_positions(context: Any, broker: Any = None) -> Dict[str, Any]:
+    """策略持仓视图(卖出/持仓判断唯一入口,spec §A1 卖出只卖自己)。
+
+    broker 带 get_instance_positions(实盘注入)→ 只返回本实例持仓;
+    否则(回测/影子/单测)→ 原 context.portfolio.positions 逻辑不变。
+    """
+    shared = _shared_positions(context)
+    fn = getattr(broker, "get_instance_positions", None) if broker is not None else None
+    if fn is None:
+        return shared
+    view = fn()
+    if not isinstance(view, dict):
+        raise TypeError(
+            f"get_instance_positions 返回非 dict: {type(view).__name__}(通道损坏,"
+            f"fail-fast 不回退共享视图——回退=互卖)"
+        )
+    return {
+        sym: _InstancePosition(sym, info, shared.get(sym))
+        for sym, info in view.items()
+    }
+
+
+def _shared_positions(context: Any) -> Dict[str, Any]:
     """聚宽 context.portfolio.positions,兼容 dict / list / 对象。"""
     if context is None:
         return {}
diff --git a/sanguo_portfolio/strategies/channel_test.py b/sanguo_portfolio/strategies/channel_test.py
index 9fe3a2e..0976802 100644
--- a/sanguo_portfolio/strategies/channel_test.py
+++ b/sanguo_portfolio/strategies/channel_test.py
@@ -89,7 +89,7 @@ class ChannelTestStrategy:
         self._day += 1
         if (self._day - 1) % max(1, self.config.period) != 0:
             return
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         target = self._target_set()
         target_set = set(target)
         logger.info("[channel_test] day=%d 主调仓 target=%s holding=%s",
@@ -102,17 +102,19 @@ class ChannelTestStrategy:
 
     # ---------------- 场景2:部分加减仓(非清仓) ----------------
     def partial_adjust(self, context: Any) -> None:
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         if not positions:
             return
         total = _available_cash(context) + sum(_safe_value(p) for p in positions.values())
         codes = sorted(positions.keys())
         half = max(1, (len(codes) + 1) // 2)
         for code in codes[:half]:
-            # 加仓 10%(走"对已持仓追加买入")
+            # 加仓 10%(走"对已持仓追加买入");市值未知(实例视图缺现价)→ 跳过,
+            # 绝不 order_target_value(code, 0) 把"加仓"变成清仓
             pos_val = _safe_value(positions[code])
-            self.broker.order_target_value(code, pos_val * 1.1)
-            logger.info("[channel_test] 加仓 %s → +10%%", code)
+            if pos_val > 0:
+                self.broker.order_target_value(code, pos_val * 1.1)
+                logger.info("[channel_test] 加仓 %s → +10%%", code)
         for code in codes[half:half + 1]:
             # 减仓到一半(走"部分卖出",非清仓)
             pos_val = _safe_value(positions[code])
@@ -123,7 +125,7 @@ class ChannelTestStrategy:
 
     # ---------------- 场景3:卖后买(当日资金复用) ----------------
     def swap_one(self, context: Any) -> None:
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         if not positions:
             return
         # 清掉第一只(昨日买的,T+1 可卖) → 换买 universe 里下一只未持有的
@@ -141,7 +143,7 @@ class ChannelTestStrategy:
     # ---------------- 场景4:T+1 拒单探针 ----------------
     def t1_probe(self, context: Any) -> None:
         """当日(含今早刚买)持仓立即试卖 → 两端都应被 T+1 拒,验证拒单通路一致。"""
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         # 优先挑"今天买的":无买入时间信息就取第一只(今早主调仓必然买过新仓)
         if not positions:
             return
@@ -154,7 +156,7 @@ class ChannelTestStrategy:
 
     # ---------------- 买入工具 ----------------
     def _buy_equal_weight(self, context: Any, target: List[str]) -> None:
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         cash = _available_cash(context)
         total = cash + sum(_safe_value(p) for p in positions.values())
         per = total / max(1, len(target))
diff --git a/sanguo_portfolio/strategies/momentum_timing.py b/sanguo_portfolio/strategies/momentum_timing.py
index 1cd8eb4..83db53f 100644
--- a/sanguo_portfolio/strategies/momentum_timing.py
+++ b/sanguo_portfolio/strategies/momentum_timing.py
@@ -155,7 +155,7 @@ class MomentumTimingStrategy:
             return
         logger.info("[%s] buy_sign=%s", cur_date, buy_sign)
 
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
 
         if not buy_sign:
             # 熊市:全部清仓(原策略语义,只对"用真实数据算出的熊市")
@@ -212,7 +212,7 @@ class MomentumTimingStrategy:
             self._close_position(stock)
 
         # 7) 等额买入 stocks 里的新股(原策略 cash/countStocks 语义)
-        positions = _get_positions(context)  # 卖出后刷新
+        positions = _get_positions(context, self.broker)  # 卖出后刷新
         target_num = len(stocks)
         if target_num == 0:
             return
@@ -224,7 +224,7 @@ class MomentumTimingStrategy:
             if stock in positions:
                 continue
             if self._open_position(stock, per_value):
-                positions = _get_positions(context)  # 刷新
+                positions = _get_positions(context, self.broker)  # 刷新
                 if len(positions) >= target_num:
                     break
         logger.info("[%s] 牛市调仓结束: target=%s", cur_date, stocks)
diff --git a/sanguo_portfolio/strategies/momentum_timing_ex.py b/sanguo_portfolio/strategies/momentum_timing_ex.py
index a70ef92..40b1da1 100644
--- a/sanguo_portfolio/strategies/momentum_timing_ex.py
+++ b/sanguo_portfolio/strategies/momentum_timing_ex.py
@@ -151,7 +151,7 @@ class MomentumTimingExStrategy:
             return
         logger.info("[%s] buy_sign=%s", cur_date, buy_sign)
 
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
 
         if not buy_sign:
             # 熊市:全部清仓(原策略语义,只对"用真实数据算出的熊市")
@@ -202,7 +202,7 @@ class MomentumTimingExStrategy:
             self._close_position(stock)
 
         # 7) 等额买入 stocks 里的新股(原策略 cash/countStocks 语义)
-        positions = _get_positions(context)  # 卖出后刷新
+        positions = _get_positions(context, self.broker)  # 卖出后刷新
         target_num = len(stocks)
         if target_num == 0:
             return
@@ -214,7 +214,7 @@ class MomentumTimingExStrategy:
             if stock in positions:
                 continue
             if self._open_position(stock, per_value):
-                positions = _get_positions(context)  # 刷新
+                positions = _get_positions(context, self.broker)  # 刷新
                 if len(positions) >= target_num:
                     break
         logger.info("[%s] 牛市调仓结束: target=%s", cur_date, stocks)
diff --git a/sanguo_portfolio/strategies/small_cap.py b/sanguo_portfolio/strategies/small_cap.py
index ad3cdac..30b9389 100644
--- a/sanguo_portfolio/strategies/small_cap.py
+++ b/sanguo_portfolio/strategies/small_cap.py
@@ -254,11 +254,11 @@ class SmallCapStrategy:
         )
         top_candidates = filters.filter_limitup_stock(
             top_candidates, self.provider,
-            positions=list(_get_positions(context).keys()), status_map=status_map,
+            positions=list(_get_positions(context, self.broker).keys()), status_map=status_map,
         )
         top_candidates = filters.filter_limitdown_stock(
             top_candidates, self.provider,
-            positions=list(_get_positions(context).keys()), status_map=status_map,
+            positions=list(_get_positions(context, self.broker).keys()), status_map=status_map,
         )
         top_candidates = _dedup(top_candidates)
 
@@ -357,11 +357,11 @@ class SmallCapStrategy:
         target_stocks = list(self.in_position_stocks)
         if not target_stocks:
             # 名单空 → 全清(防御性,正常不会到这里)
-            for code in list(_get_positions(context).keys()):
+            for code in list(_get_positions(context, self.broker).keys()):
                 self._close_position(code)
             return
 
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
 
         # 1) 卖出不在 target 的(原策略 order_target(stock, 0, pindex=0))
         for code in list(positions.keys()):
@@ -370,7 +370,7 @@ class SmallCapStrategy:
             self._close_position(code)
 
         # 2) 等额买入 target 中的新股(原策略 per_value = stock_value/len)
-        positions = _get_positions(context)  # 刷新
+        positions = _get_positions(context, self.broker)  # 刷新
         target_num = len(target_stocks)
         cash = _available_cash(context)
         if cash <= 0 or target_num == 0:
@@ -380,7 +380,7 @@ class SmallCapStrategy:
             if code in positions:
                 continue
             if self._open_position(code, per_value):
-                positions = _get_positions(context)
+                positions = _get_positions(context, self.broker)
                 if len(positions) >= target_num:
                     break
         logger.info(
diff --git a/sanguo_portfolio/strategies/small_cap_ex.py b/sanguo_portfolio/strategies/small_cap_ex.py
index b8a982b..60ee4a2 100644
--- a/sanguo_portfolio/strategies/small_cap_ex.py
+++ b/sanguo_portfolio/strategies/small_cap_ex.py
@@ -257,11 +257,11 @@ class SmallCapExStrategy:
         )
         top_candidates = filters.filter_limitup_stock(
             top_candidates, self.provider,
-            positions=list(_get_positions(context).keys()), status_map=status_map,
+            positions=list(_get_positions(context, self.broker).keys()), status_map=status_map,
         )
         top_candidates = filters.filter_limitdown_stock(
             top_candidates, self.provider,
-            positions=list(_get_positions(context).keys()), status_map=status_map,
+            positions=list(_get_positions(context, self.broker).keys()), status_map=status_map,
         )
         top_candidates = _dedup(top_candidates)
 
@@ -360,11 +360,11 @@ class SmallCapExStrategy:
         target_stocks = list(self.in_position_stocks)
         if not target_stocks:
             # 名单空 → 全清(防御性,正常不会到这里)
-            for code in list(_get_positions(context).keys()):
+            for code in list(_get_positions(context, self.broker).keys()):
                 self._close_position(code)
             return
 
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
 
         # 1) 卖出不在 target 的(原策略 order_target(stock, 0, pindex=0))
         for code in list(positions.keys()):
@@ -373,7 +373,7 @@ class SmallCapExStrategy:
             self._close_position(code)
 
         # 2) 等额买入 target 中的新股(原策略 per_value = stock_value/len)
-        positions = _get_positions(context)  # 刷新
+        positions = _get_positions(context, self.broker)  # 刷新
         target_num = len(target_stocks)
         cash = _available_cash(context)
         if cash <= 0 or target_num == 0:
@@ -383,7 +383,7 @@ class SmallCapExStrategy:
             if code in positions:
                 continue
             if self._open_position(code, per_value):
-                positions = _get_positions(context)
+                positions = _get_positions(context, self.broker)
                 if len(positions) >= target_num:
                     break
         logger.info(
diff --git a/sanguo_portfolio/strategies/value_selection.py b/sanguo_portfolio/strategies/value_selection.py
index af71006..0cf42fd 100644
--- a/sanguo_portfolio/strategies/value_selection.py
+++ b/sanguo_portfolio/strategies/value_selection.py
@@ -171,7 +171,7 @@ class ValueSelectionStrategy:
 
         # 3) 过滤涨停/跌停/停牌(复用 sanguo_portfolio.filters)
         # 批量预取当日涨跌停/停牌状态(数据 session 判断好),三个 filter 共享一次查询
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         status_map = self._get_limit_status(buy_list, previous_date)
         buy_list = filters.filter_limitup_stock(
             buy_list, self.provider,
@@ -193,7 +193,7 @@ class ValueSelectionStrategy:
             self._close_position(stock)
 
         # 5) 等额买入 buy_list 里的新股(原策略 buy 函数, cash/countStocks 语义)
-        positions = _get_positions(context)  # 卖出后刷新
+        positions = _get_positions(context, self.broker)  # 卖出后刷新
         target_num = len(buy_list)
         if target_num == 0:
             return
@@ -205,7 +205,7 @@ class ValueSelectionStrategy:
             if stock in positions:
                 continue
             if self._open_position(stock, per_value):
-                positions = _get_positions(context)  # 刷新
+                positions = _get_positions(context, self.broker)  # 刷新
                 if len(positions) >= target_num:
                     break
         logger.info("[%s] 月度调仓结束: target=%s", previous_date, buy_list)
diff --git a/sanguo_portfolio/strategies/value_selection_ex.py b/sanguo_portfolio/strategies/value_selection_ex.py
index 888f11e..42fea2a 100644
--- a/sanguo_portfolio/strategies/value_selection_ex.py
+++ b/sanguo_portfolio/strategies/value_selection_ex.py
@@ -174,7 +174,7 @@ class ValueSelectionExStrategy:
 
         # 3) 过滤涨停/跌停/停牌(复用 sanguo_portfolio.filters)
         # 批量预取当日涨跌停/停牌状态(数据 session 判断好),三个 filter 共享一次查询
-        positions = _get_positions(context)
+        positions = _get_positions(context, self.broker)
         status_map = self._get_limit_status(buy_list, previous_date)
         buy_list = filters.filter_limitup_stock(
             buy_list, self.provider,
@@ -196,7 +196,7 @@ class ValueSelectionExStrategy:
             self._close_position(stock)
 
         # 5) 等额买入 buy_list 里的新股(原策略 buy 函数, cash/countStocks 语义)
-        positions = _get_positions(context)  # 卖出后刷新
+        positions = _get_positions(context, self.broker)  # 卖出后刷新
         target_num = len(buy_list)
         if target_num == 0:
             return
@@ -208,7 +208,7 @@ class ValueSelectionExStrategy:
             if stock in positions:
                 continue
             if self._open_position(stock, per_value):
-                positions = _get_positions(context)  # 刷新
+                positions = _get_positions(context, self.broker)  # 刷新
                 if len(positions) >= target_num:
                     break
         logger.info("[%s] 月度调仓结束: target=%s", previous_date, buy_list)
diff --git a/tests/portfolio/test_instance_view_isolation.py b/tests/portfolio/test_instance_view_isolation.py
new file mode 100644
index 0000000..cc336f2
--- /dev/null
+++ b/tests/portfolio/test_instance_view_isolation.py
@@ -0,0 +1,258 @@
+"""A1 卖出只卖自己(spec docs/design/multi-strategy-instance-budget-spec.md §A1)。
+
+共享 QMT 账户互卖事故(2026-08-19 盘后实锤:518880/600036 双实例各卖):
+context.portfolio 是**全账户**视图 → "卖掉所有不在目标里的持仓"会卖掉别家
+策略的持仓。修法:策略持仓读取优先 broker.get_instance_positions()
+(实盘 runner_live 注入的实例账本视图),回测/无台账回退 context.portfolio。
+
+验收(spec 原文):单测覆盖"实例视图为空 → 零卖出";实例视图只含自己的标的 →
+只卖自己的。模拟盘/回测路径(context.portfolio)行为不变。
+"""
+from __future__ import annotations
+
+from datetime import datetime
+from unittest.mock import MagicMock
+
+from tests.portfolio.conftest import FakeContext, FakePosition
+from sanguo_portfolio.strategies import (
+    ChannelTestConfig,
+    ChannelTestStrategy,
+    SmallCapStrategy,
+)
+from sanguo_portfolio.strategies.all_weather import (
+    BrokerFacade,
+    _get_positions,
+)
+
+
+# =================== 公共装配 ===================
+def _shared_ctx() -> FakeContext:
+    """共享账户视图:自己的 518880 + 别家的 600036(互卖事故当日的真实组合)。"""
+    return FakeContext(
+        current_dt=datetime(2024, 10, 8, 9, 35),
+        positions={
+            "518880.XSHG": FakePosition("518880.XSHG", avg_cost=7.0, price=7.5),
+            "600036.XSHG": FakePosition("600036.XSHG", avg_cost=35.0, price=36.0),
+        },
+    )
+
+
+def _attach_ledger(strategy, view: dict) -> None:
+    """模拟 live_strategy._setup 的通道注入(dae56e2):账本视图挂到 broker。"""
+    strategy.broker.get_instance_positions = lambda: view
+
+
+OWN_VIEW = {"518880.XSHG": {"amount": 1000, "closeable_amount": 1000, "avg_cost": 7.0}}
+
+
+# =================== helper 层 ===================
+class TestGetPositionsInstanceView:
+    def test_no_channel_falls_back_to_shared(self):
+        """无通道(回测/影子/单测)→ 原 context.portfolio 逻辑,对象原样。"""
+        ctx = _shared_ctx()
+        out = _get_positions(ctx, BrokerFacade())
+        assert set(out.keys()) == {"518880.XSHG", "600036.XSHG"}
+
+    def test_channel_empty_view_returns_empty(self):
+        """台账空(本实例无持仓)→ 空 dict,即使共享账户有别的策略持仓。"""
+        ctx = _shared_ctx()
+        broker = BrokerFacade()
+        broker.get_instance_positions = lambda: {}
+        assert _get_positions(ctx, broker) == {}
+
+    def test_channel_view_keys_and_attrs(self):
+        """有通道 → 键=实例视图;数量/成本取台账,现价从共享视图同名标的补。"""
+        ctx = _shared_ctx()
+        broker = BrokerFacade()
+        broker.get_instance_positions = lambda: OWN_VIEW
+        out = _get_positions(ctx, broker)
+        assert set(out.keys()) == {"518880.XSHG"}
+        pos = out["518880.XSHG"]
+        assert pos.total_amount == 1000
+        assert pos.closeable_amount == 1000
+        assert pos.avg_cost == 7.0
+        assert pos.price == 7.5          # 行情从共享视图补(市场数据非所有权)
+        assert pos.security == "518880.XSHG"
+
+    def test_channel_symbol_missing_in_shared_price_none(self):
+        """台账有、共享视图无(极端:快照缺口)→ price None,数量/成本仍可用。"""
+        ctx = _shared_ctx()
+        broker = BrokerFacade()
+        broker.get_instance_positions = lambda: {
+            "300059.XSHE": {"amount": 500, "closeable_amount": 500, "avg_cost": 10.0},
+        }
+        pos = _get_positions(ctx, broker)["300059.XSHE"]
+        assert pos.price is None
+        assert pos.total_amount == 500
+
+    def test_no_broker_arg_backward_compatible(self):
+        """单参调用(旧签名)→ 共享视图(既有测试/调用点不受影响)。"""
+        out = _get_positions(_shared_ctx())
+        assert set(out.keys()) == {"518880.XSHG", "600036.XSHG"}
+
+
+# =================== channel_test(互卖事故现场) ===================
+class _RecordingBroker(BrokerFacade):
+    def __init__(self) -> None:
+        self.calls: list = []
+        super().__init__()
+        self.order_target_value = self._rec
+        self.order_value = self._rec
+
+    def _rec(self, code, value):
+        self.calls.append((code, value))
+        return None
+
+
+def _channel_strategy(**kw) -> ChannelTestStrategy:
+    broker = _RecordingBroker()
+    cfg = ChannelTestConfig(hold_n=2, period=1)
+    for k, v in kw.items():
+        setattr(cfg, k, v)
+    return ChannelTestStrategy(provider=None, broker=broker, config=cfg)
+
+
+class TestChannelTestIsolation:
+    def test_rotate_empty_view_zero_sells(self):
+        """spec 验收核心:实例视图空 → 主调仓零卖出(只买不卖,正确行为)。"""
+        s = _channel_strategy()
+        _attach_ledger(s, {})
+        s.rotate(_shared_ctx())
+        sells = [c for c, v in s.broker.calls if v == 0]
+        assert sells == []
+
+    def test_rotate_sells_only_instance_positions(self):
+        """目标不含 518880 → 只卖台账里的 518880,不碰别家的 600036。"""
+        s = _channel_strategy()
+        _attach_ledger(s, OWN_VIEW)
+        s.rotate(_shared_ctx())
+        sells = [c for c, v in s.broker.calls if v == 0]
+        assert sells == ["518880.XSHG"]
+
+    def test_swap_one_uses_instance_view(self):
+        """13:45 换仓卖出腿只从实例视图取标的(当日 518880 互卖事故路径)。"""
+        s = _channel_strategy(intraday_swap=True)
+        s._day = 1
+        _attach_ledger(s, OWN_VIEW)
+        s.swap_one(_shared_ctx())
+        sells = [c for c, v in s.broker.calls if v == 0]
+        assert sells == ["518880.XSHG"]
+
+    def test_t1_probe_empty_view_no_order(self):
+        """T+1 探针在实例视图空时不下单(不探别家的仓)。"""
+        s = _channel_strategy(probe_t1=True)
+        _attach_ledger(s, {})
+        s.t1_probe(_shared_ctx())
+        assert s.broker.calls == []
+
+    def test_partial_adjust_skips_unknown_value(self):
+        """加减仓腿:取不到市值的标的跳过,绝不 order_target_value(code,0) 误清仓。"""
+        s = _channel_strategy(intraday_partial=True)
+        _attach_ledger(s, {
+            "300059.XSHE": {"amount": 500, "closeable_amount": 500, "avg_cost": 10.0},
+        })
+        # 共享视图无 300059 → value 未知 → 加仓/减仓腿都应跳过
+        s.partial_adjust(_shared_ctx())
+        assert s.broker.calls == []
+
+
+# =================== momentum_timing(熊市清仓段) ===================
+class TestMomentumBearClearIsolation:
+    def _bear_strategy(self, view):
+        from sanguo_portfolio.strategies import MomentumTimingConfig, MomentumTimingStrategy
+        provider = MagicMock(name="provider")
+        broker = BrokerFacade()
+        broker.order_target_value = MagicMock(return_value=MagicMock(filled=100))
+        s = MomentumTimingStrategy(
+            provider=provider, broker=broker,
+            config=MomentumTimingConfig(index_list=["IDX.XSHG"]),
+        )
+        if view is not None:
+            _attach_ledger(s, view)
+        return s
+
+    def _force_bear(self, s):
+        import pandas as pd
+        s.provider.get_closes_panel.side_effect = None
+        s.provider.get_closes_panel.return_value = pd.DataFrame(
+            {"IDX.XSHG": [40.0 - i for i in range(30)]},
+            index=pd.DatetimeIndex(
+                pd.date_range(end="2024-10-08", periods=30)
+            ),
+        )
+
+    def test_bear_clear_only_instance_positions(self):
+        """真实熊市清仓也只清自己:台账 518880,别家 600036 不动。"""
+        s = self._bear_strategy(OWN_VIEW)
+        self._force_bear(s)
+        s.handle_data(FakeContext(current_dt=datetime(2024, 10, 8, 9, 30)))
+        sell_codes = {
+            c.args[0] for c in s.broker.order_target_value.call_args_list
+            if c.args[1] == 0
+        }
+        assert sell_codes == {"518880.XSHG"}
+
+    def test_bear_clear_empty_view_zero_sells(self):
+        """实例视图空 + 熊市 → 零卖出(别家持仓绝不动)。"""
+        s = self._bear_strategy({})
+        self._force_bear(s)
+        s.handle_data(FakeContext(current_dt=datetime(2024, 10, 8, 9, 30)))
+        sells = [c for c in s.broker.order_target_value.call_args_list if c.args[1] == 0]
+        assert sells == []
+
+
+# =================== small_cap(_rebalance 清仓段) ===================
+class TestSmallCapRebalanceIsolation:
+    def test_defensive_clear_only_instance_positions(self):
+        """名单空 → 全清分支只清实例视图内的标的。"""
+        from sanguo_portfolio.strategies import SmallCapConfig
+        provider = MagicMock(name="provider")
+        broker = BrokerFacade()
+        broker.order_target_value = MagicMock(return_value=MagicMock(filled=100))
+        s = SmallCapStrategy(provider=provider, broker=broker,
+                             config=SmallCapConfig())
+        _attach_ledger(s, OWN_VIEW)
+        s.in_position_stocks = []
+        s._rebalance(FakeContext(current_dt=datetime(2024, 10, 8, 10, 0)))
+        sell_codes = {
+            c.args[0] for c in s.broker.order_target_value.call_args_list
+            if c.args[1] == 0
+        }
+        assert sell_codes == {"518880.XSHG"}
+
+
+# =================== all_weather(stop_loss 用 price/avg_cost) ===================
+class TestAllWeatherStopLossIsolation:
+    def _make(self, view):
+        from sanguo_portfolio.strategies import AllWeatherStrategy
+        provider = MagicMock(name="provider")
+        provider.get_limit_status_batch.side_effect = lambda codes, date=None: {
+            c: {"is_limit_up": False, "is_limit_down": False, "is_paused": False}
+            for c in codes
+        }
+        broker = BrokerFacade()
+        broker.order_target_value = MagicMock(return_value=MagicMock(filled=100))
+        broker.order_value = MagicMock(return_value=MagicMock(filled=100))
+        s = AllWeatherStrategy(provider=provider, broker=broker)
+        if view is not None:
+            _attach_ledger(s, view)
+        return s
+
+    def test_stop_loss_sells_only_instance_positions(self):
+        """两只都跌破 -8%:只卖台账里的 518880(止损价从共享视图补,链路仍通)。"""
+        ctx = FakeContext(
+            current_dt=datetime(2024, 10, 8, 14, 0),
+            positions={
+                "518880.XSHG": FakePosition("518880.XSHG", avg_cost=10.0, price=8.0),
+                "600036.XSHG": FakePosition("600036.XSHG", avg_cost=40.0, price=30.0),
+            },
+        )
+        view = {"518880.XSHG": {"amount": 1000, "closeable_amount": 1000,
+                                "avg_cost": 10.0}}
+        s = self._make(view)
+        s.stop_loss(ctx)
+        sell_codes = {
+            c.args[0] for c in s.broker.order_target_value.call_args_list
+            if c.args[1] == 0
+        }
+        assert sell_codes == {"518880.XSHG"}