diff --git a/.gitignore b/.gitignore
index 2c4b1e5..5c170f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -88,6 +88,8 @@ data/excel_exports/
 # 上傳檔案
 web/static/uploads/
 web/static/screenshots/
+uploads/
+screenshots/
 MOMO Pro/uploads/
 MOMO Pro/screenshots/
 templates/__init__.py
diff --git a/docs/memory/claude_inventory_validation_20260513.md b/docs/memory/claude_inventory_validation_20260513.md
index a82ab50..37c8cd5 100644
--- a/docs/memory/claude_inventory_validation_20260513.md
+++ b/docs/memory/claude_inventory_validation_20260513.md
@@ -40,7 +40,7 @@
 - CD migration 全範圍冪等已有回歸守門：`.gitea/workflows/cd.yaml` 必須維持 024-099 pattern、`sort | uniq` 與 `for m in $V5_MIGRATIONS` apply loop。
 - CD Observability production smoke 已補 timeout 守門：`quick_review.sh --observability-smoke` 必須帶 `--timeout 12`。
 - 0-byte `database/momo*.db` 迷惑檔已不存在；真實 SQLite 僅在 `data/momo_database.db`。
-- `.gitignore` 已涵蓋 `.claude/worktrees/`、`.tmp_*`、`MOMO Pro/`、uploads/screenshots。
+- `.gitignore` 已涵蓋 `.claude/worktrees/`、`.tmp_*`、`MOMO Pro/`、root/uploads/screenshots 與 `MOMO Pro` uploads/screenshots，並由 `tests/test_gitignore_contracts.py` 守住。
 - `cache_service.py` 已成為 `cache_manager.py` 的相容 shim，`_SALES_CACHE_TTL` 單一來源有測試鎖住。
 - `aiops-core/requirements.txt` 已不存在，`aiops-core/README.md` 已標記此目錄只保留歷史 stub，不應安裝或部署。
 - V2 提到的「死依賴」不可整批刪：`beautifulsoup4` 用於多個 crawler、`google-api-python-client` 用於 Google Drive、`google-generativeai` 用於 Gemini paths、`python-pptx` 用於 PPT generator、`matplotlib` 用於 Telegram/圖表/PPT。
diff --git a/tests/test_gitignore_contracts.py b/tests/test_gitignore_contracts.py
new file mode 100644
index 0000000..8010426
--- /dev/null
+++ b/tests/test_gitignore_contracts.py
@@ -0,0 +1,21 @@
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def test_local_generated_artifacts_stay_ignored():
+    gitignore = (ROOT / ".gitignore").read_text(encoding="utf-8")
+
+    required_patterns = [
+        ".claude/worktrees/",
+        ".tmp_*",
+        "MOMO Pro/",
+        "MOMO Pro/uploads/",
+        "MOMO Pro/screenshots/",
+        "uploads/",
+        "screenshots/",
+        "database/*.db",
+    ]
+    for pattern in required_patterns:
+        assert pattern in gitignore