diff --git a/docs/api/control-plane.md b/docs/api/control-plane.md
index 0fb1b51..9dda089 100644
--- a/docs/api/control-plane.md
+++ b/docs/api/control-plane.md
@@ -102,6 +102,10 @@ Worker 自报的超前版本或 epoch 也必须拒绝。
   和停止新分配的 `usable_until`。
 - 内容 `checksum`。
 
+`version` 在同一 Worker 流内严格连续递增，即使 `ownership_epoch` 因分配、Drain
+或所有权恢复而前进也不重置。Gateway 只接受比当前 `version` 恰好大一的完整快照，
+并拒绝倒退的 epoch；因此 epoch 变化不会让仍在长连接内的刷新快照被误判为缺口。
+
 `usable_until = expires_at - allocationSafetyMargin`。Worker 必须以
 `usable_until` 作为最后可分配时刻；达到该时间后即使尚未到 `expires_at`，
 也不得再为新请求选择该 Proxy。
diff --git a/findings.md b/findings.md
index f5c45b3..2f805b3 100644
--- a/findings.md
+++ b/findings.md
@@ -123,6 +123,9 @@ Routing 自上而下匹配，首条命中停止；支持 Gateway 与 Extract 两
   Gateway 使用既有 `SessionSupervisor` 退避重连。Gateway 本地 Store 对从完整 Snapshot
   消失且仍有 Active/Reserved 的 Proxy 已按 draining 继续上报，但 Controller 尚未具备
   自动 `BeginDrain`/`AcknowledgeDrain` 编排或 Worker 分配器，不能视为自动 Drain 闭环。
+- Snapshot 的 `version` 是同一 Worker 流的连续序列，`ownership_epoch` 是独立且只能前进
+  的权威栅栏；epoch 变化不重置 version。此前 Gateway 错把 epoch 前进要求为 version=1，
+  与 Controller 的 `lastAppliedVersion+1` 生成规则冲突，现已用连续版本规则统一。
 
 ## Git 同步事实（2026-07-29）
 
diff --git a/internal/gateway/dispatch/dispatcher_test.go b/internal/gateway/dispatch/dispatcher_test.go
index 86c182e..5949c50 100644
--- a/internal/gateway/dispatch/dispatcher_test.go
+++ b/internal/gateway/dispatch/dispatcher_test.go
@@ -354,11 +354,11 @@ func TestAcquireSurvivesConcurrentSnapshotApply(t *testing.T) {
 			{epoch: 1, version: 2},
 			{epoch: 1, version: 3},
 			{epoch: 1, version: 4},
-			{epoch: 2, version: 1},
-			{epoch: 2, version: 2},
-			{epoch: 2, version: 3},
-			{epoch: 3, version: 1},
-			{epoch: 3, version: 2},
+			{epoch: 2, version: 5},
+			{epoch: 2, version: 6},
+			{epoch: 2, version: 7},
+			{epoch: 3, version: 8},
+			{epoch: 3, version: 9},
 		}
 		for _, step := range steps {
 			next := snapshot.Envelope{
diff --git a/internal/gateway/snapshot/store.go b/internal/gateway/snapshot/store.go
index 9032e72..14f7a69 100644
--- a/internal/gateway/snapshot/store.go
+++ b/internal/gateway/snapshot/store.go
@@ -267,9 +267,7 @@ func (s *Store) Apply(envelope Envelope) error {
 		switch {
 		case envelope.Epoch < current.Epoch:
 			return ErrResyncRequired
-		case envelope.Epoch == current.Epoch && envelope.Version != current.Version+1:
-			return ErrResyncRequired
-		case envelope.Epoch > current.Epoch && envelope.Version != 1:
+		case envelope.Version != current.Version+1:
 			return ErrResyncRequired
 		}
 	}
diff --git a/internal/gateway/snapshot/store_test.go b/internal/gateway/snapshot/store_test.go
index 01dad2f..be1638a 100644
--- a/internal/gateway/snapshot/store_test.go
+++ b/internal/gateway/snapshot/store_test.go
@@ -78,6 +78,12 @@ func TestStoreRejectsWrongWorkerVersionGapAndChecksum(t *testing.T) {
 		t.Fatalf("version gap error = %v, want ErrResyncRequired", err)
 	}
 
+	epochReset := base
+	epochReset.Epoch = 2
+	if err := store.Apply(epochReset); !errors.Is(err, ErrResyncRequired) {
+		t.Fatalf("epoch reset version error = %v, want ErrResyncRequired", err)
+	}
+
 	badChecksum := base
 	badChecksum.Version = 2
 	badChecksum.Checksum = "bad"
@@ -272,7 +278,7 @@ func TestStoreApplyReusesCapacityAcrossVersionsAndEpochs(t *testing.T) {
 
 	third := second
 	third.Epoch = 2
-	third.Version = 1
+	third.Version = 3
 	third.Checksum = Checksum(third.Proxies)
 	if err := store.Apply(third); err != nil {
 		t.Fatalf("Apply(third): %v", err)
diff --git a/progress.md b/progress.md
index c63cfeb..8c9a785 100644
--- a/progress.md
+++ b/progress.md
@@ -21,6 +21,9 @@
   Delta 的 fail-closed 校验，也不把自动 Drain/ACK 记为已完成。
 - Health Scheduler 现在先建立 EGRESS 与 Routing TARGET 的独立 due 引用，再投递
   BASIC 任务；在单项小批次下，短 TTL Proxy 不会因 BASIC 先出队而错过首次出口/目标探测。
+- 修复 Snapshot epoch/version 栅栏：Worker 流的 `version` 在 ownership epoch 前进时
+  仍严格递增，Gateway 以连续版本加非倒退 epoch 进行完整快照原子替换，避免动态分配后的
+  有效刷新被错误拒绝。这是后续自动 Drain 编排的必要前提。
 
 ## 2026-07-30