diff --git a/test_plan_cache.py b/test_plan_cache.py
index 66c1856..133a575 100644
--- a/test_plan_cache.py
+++ b/test_plan_cache.py
@@ -31,18 +31,23 @@ def t(name, cond, extra=""):
 
 
 class _Spy:
-    """替身：记录 collect 被调了几次、每次算多久。"""
+    """替身：记录「算一份计划」被调了几次、每次算多久。
+
+    挂在 api._plan_build 上，不挂在 plan.collect 上：缓存与单飞管的是「同一个键算几次」，
+    底下走快照还是现场装配与它无关。2026-09-10 接口改成优先读快照之后，挂在 collect 上的
+    替身就再也不会被调到，测试会假通过。
+    """
 
     def __init__(self, delay=0.0):
         self.calls = []
         self.delay = delay
         self._lock = threading.Lock()
 
-    def collect(self, date, top, obs_top, theme_cap):
+    def build(self, date, top, obs_top, theme_cap):
         with self._lock:
             self.calls.append((date, top, obs_top, theme_cap))
         time.sleep(self.delay)
-        return {"date": date or "2026-09-09", "main": [], "observe": [], "_full": "该被丢掉"}
+        return {"date": date or "2026-09-09", "main": [], "observe": [], "plan_source": "替身"}
 
 
 def _reset():
@@ -54,15 +59,15 @@ def test_hit_and_miss():
     print("[命中与未命中]")
     spy = _Spy()
     _reset()
-    old_collect, old_latest = plan.collect, plan._latest_date
-    plan.collect = spy.collect
+    old_build, old_latest = api._plan_build, plan._latest_date
+    api._plan_build = spy.build
     plan._latest_date = lambda tbl: "2026-09-09"
     try:
         d1, hit1 = api._plan_cached(None, 300, 100, 2, False)
         d2, hit2 = api._plan_cached(None, 300, 100, 2, False)
         t("第一次未命中、第二次命中", hit1 is False and hit2 is True)
         t("只算了一次", len(spy.calls) == 1, spy.calls)
-        t("内部大字段被丢掉，不进缓存也不出接口", "_full" not in d1 and "_full" not in d2)
+        t("拿到的就是统一入口给的那一份，缓存不改内容", d1 is d2 and d1["date"] == "2026-09-09")
 
         # 参数不同 = 不同的键。PMS 用 300/100，人工联调常用 30/20，两份互不干扰
         api._plan_cached(None, 30, 20, 2, False)
@@ -80,15 +85,15 @@ def test_hit_and_miss():
         _d, hit5 = api._plan_cached(None, 300, 100, 2, False)
         t("强刷之后缓存是新的", hit5 is True and len(spy.calls) == n + 1)
     finally:
-        plan.collect, plan._latest_date = old_collect, old_latest
+        api._plan_build, plan._latest_date = old_build, old_latest
 
 
 def test_single_flight():
     print("[同键只算一次 —— 09-10 超时的那一半]")
     spy = _Spy(delay=0.4)          # 装配很慢，真实环境是三十多秒
     _reset()
-    old_collect, old_latest = plan.collect, plan._latest_date
-    plan.collect = spy.collect
+    old_build, old_latest = api._plan_build, plan._latest_date
+    api._plan_build = spy.build
     plan._latest_date = lambda tbl: "2026-09-09"
     try:
         results, errs = [], []
@@ -114,15 +119,15 @@ def test_single_flight():
         t("只有一路是未命中，其余都吃了缓存",
           sum(1 for _d, h in results if not h) == 1, [h for _d, h in results])
     finally:
-        plan.collect, plan._latest_date = old_collect, old_latest
+        api._plan_build, plan._latest_date = old_build, old_latest
 
 
 def test_different_keys_not_blocked():
     print("[不同参数互不阻塞]")
     spy = _Spy(delay=0.4)
     _reset()
-    old_collect, old_latest = plan.collect, plan._latest_date
-    plan.collect = spy.collect
+    old_build, old_latest = api._plan_build, plan._latest_date
+    api._plan_build = spy.build
     plan._latest_date = lambda tbl: "2026-09-09"
     try:
         def one(top):
@@ -137,7 +142,7 @@ def test_different_keys_not_blocked():
         t("三种参数各算一次", len(spy.calls) == 3, spy.calls)
         t("是并行不是排队", el < 0.4 * 2.5, "%.2f 秒" % el)
     finally:
-        plan.collect, plan._latest_date = old_collect, old_latest
+        api._plan_build, plan._latest_date = old_build, old_latest
 
 
 def test_ttl_covers_trading_day():