diff --git a/game/data/schemas/level_table.gd b/game/data/schemas/level_table.gd
index 4d66fbc1..1d7fabea 100644
--- a/game/data/schemas/level_table.gd
+++ b/game/data/schemas/level_table.gd
@@ -53,7 +53,8 @@ static func validate_graph(nodes: Array) -> Array:
 	var well := _check_nodes_wellformed(nodes)
 	if not (well["errs"] as Array).is_empty():
 		return well["errs"]
-	var by_id: Dictionary = well["by_id"]
+	var by_id: Dictionary[int, Dictionary] = {}
+	by_id.assign(well["by_id"])
 	var edges := _check_edges(by_id, well["indeg"])
 	if not (edges["errs"] as Array).is_empty():
 		return edges["errs"]
diff --git a/game/tests/golden/README.md b/game/tests/golden/README.md
index 9988a44c..a0f3b8d4 100644
--- a/game/tests/golden/README.md
+++ b/game/tests/golden/README.md
@@ -12,6 +12,9 @@
 - **判有效**（changed 远低于 2% 阈值）：基线**留在位并在此加注一次判定记录**，不得顺手重制；
 - **判失效**（changed 超阈值或换代面落在裁剪区外）：按迭代 26 T6 先例**显式重制 + 呈报 + 复闸**，
   禁止先动后判、禁止用「重制一下就绿了」掩盖真实视觉回归。
+- **加严口径（棋盘三图）**：棋盘图 changed>0 且差异像素落在棋盘裁剪区内（900×760）一律按**判失效**
+  处理——占比远低于 2% 阈值也不判有效，显式呈报后由用户定是否重制。该口径只收紧棋盘三图的判读，
+  不改写 2% 容差本身的语义（`golden_compare.py` 判据不动）；启动态菜单不适用本口径。
 
 ## 判定记录