diff --git a/.gitignore b/.gitignore
index e5d6f459..c3075e86 100644
--- a/.gitignore
+++ b/.gitignore
@@ -25,6 +25,8 @@ __pycache__/
 # === OS ===
 Thumbs.db
 .DS_Store
+# Windows shell 缓存误写：某进程环境变量未展开，把 C:\ProgramData 缓存库写进仓库根
+%SystemDrive%/
 
 # === Editor ===
 *.swp
@@ -34,3 +36,4 @@ Thumbs.db
 # === Logs & temp ===
 *.log
 *.tmp
+.zcode/plans/