diff --git a/docs/API-MAINLINE.md b/docs/API-MAINLINE.md
index edd46a1b8..9ae399396 100644
--- a/docs/API-MAINLINE.md
+++ b/docs/API-MAINLINE.md
@@ -117,8 +117,9 @@
 |--------|------|------|------|
 | POST | `/` | 上传文件 | ✅ ACTIVE |
 
-**Use Cases**:
-- 直接调用 `MinIOService`
+**Use Cases / Services**:
+- `SubmitIngestJobUseCase`
+- `OSSStorageService`（经 `get_storage_service` 注入）
 
 ---
 
diff --git a/docs/CODE-STATUS.md b/docs/CODE-STATUS.md
index 73fea1c82..fd2b69d12 100644
--- a/docs/CODE-STATUS.md
+++ b/docs/CODE-STATUS.md
@@ -259,7 +259,7 @@ apps/web/src/
 ```
 apps/api/app/api/routes/upload.py (API)
   ↓
-apps/api/app/core/storage.py (MinIO)
+apps/api/app/core/storage.py (OSS / generated-files fallback)
   ↓
 packages/domain/entities.py::Asset (领域模型)
   ↓
diff --git a/docs/DATABASE-SWITCH.md b/docs/DATABASE-SWITCH.md
index 7bebe45e9..17e23eb1d 100644
--- a/docs/DATABASE-SWITCH.md
+++ b/docs/DATABASE-SWITCH.md
@@ -99,10 +99,9 @@ uvicorn apps.api.main:app --reload
    \q
    ```
 
-3. **运行迁移**
+3. **运行 Alembic 迁移**
    ```bash
-   psql postgresql://xiaoxia_user:password@localhost:5432/xiaoxia_saas \
-     -f migrations/001_initial_schema.sql
+   alembic upgrade head
    ```
 
 4. **配置环境变量**
@@ -120,17 +119,17 @@ uvicorn apps.api.main:app --reload
 
 ## 🐳 Docker 环境
 
-### docker-compose（自动配置 PostgreSQL）
+### Canonical Docker Compose（自动配置 PostgreSQL）
 
 ```bash
 # 自动启动 PostgreSQL 和应用
-docker-compose up -d
+WEB_PORT=3001 docker compose -f infra/docker/compose.yml up -d --build
 
 # 查看日志
-docker-compose logs -f api
+docker compose -f infra/docker/compose.yml logs -f api
 ```
 
-`docker-compose.yml` 默认使用 PostgreSQL。
+`infra/docker/compose.yml` 是当前唯一有效 compose 入口；根目录 `docker-compose.yml` 已退役。
 
 ---
 
diff --git a/docs/DEPLOYMENT.md b/docs/DEPLOYMENT.md
index b5a958852..ec95a4041 100644
--- a/docs/DEPLOYMENT.md
+++ b/docs/DEPLOYMENT.md
@@ -78,6 +78,16 @@ Staging 当前可以保持 no-op；Production 开启前必须先验证 SMTP/Redi
 
 ---
 
+## 生成文件存储与保留
+
+- Staging 未配置 OSS 凭证时，生成视频落盘到 `/var/lib/xiaoxia-saas-staging/generated`，并通过 Nginx `/generated-files/` 公开访问。
+- Production 优先使用 OSS；若临时启用本地 fallback，必须配置独立持久化目录、Nginx 只读公开路径和磁盘告警。
+- 保留策略建议：staging 生成文件保留 7 天或保留最近 20GB；production 按业务套餐/订单状态定义，禁止无上限增长。
+- 清理脚本上线前必须先 dry-run 输出待删列表，再按 workspace/project 维度删除，避免误删仍被 GeneratedVideo 记录引用的文件。
+- 当前脚本：`python scripts/cleanup_generated_files.py --dir /var/lib/xiaoxia-saas-staging/generated --days 7` 仅 dry-run；确认后再加 `--apply`。
+
+---
+
 ## 生产发布清单
 
 生产发布前必须按 `docs/PRODUCTION-RELEASE-CHECKLIST.md` 执行：先备份，后 Alembic，最后 smoke；禁止靠临场记忆操作数据库。
diff --git a/docs/DOCKER-DEPLOYMENT.md b/docs/DOCKER-DEPLOYMENT.md
index dfb6e6878..47bc0192c 100644
--- a/docs/DOCKER-DEPLOYMENT.md
+++ b/docs/DOCKER-DEPLOYMENT.md
@@ -1,5 +1,7 @@
 # 小虾 SaaS Docker 部署指南
 
+> ⚠️ 历史文档，仅供归档参考。当前 canonical 部署入口是 `infra/docker/compose.yml` 和 `infra/docker/deploy-staging.sh`；生产发布必须按 `docs/PRODUCTION-RELEASE-CHECKLIST.md` 执行。
+
 ## 🐳 快速启动
 
 ### 1. 准备环境变量
diff --git a/docs/PRODUCTION-CHECKLIST.md b/docs/PRODUCTION-CHECKLIST.md
index 55e4caf08..7cf67bedc 100644
--- a/docs/PRODUCTION-CHECKLIST.md
+++ b/docs/PRODUCTION-CHECKLIST.md
@@ -211,14 +211,13 @@ redis-cli -u $REDIS_URL ping
 python scripts/test_email.py
 
 # 6. 检查 Docker 镜像
-docker build -t xiaoxia-saas:latest .
-docker run --rm xiaoxia-saas:latest python -c "import apps.api.main"
+WEB_PORT=3001 docker compose -f infra/docker/compose.yml build api worker web
 
 # 7. 检查数据库迁移
-psql $DATABASE_URL -f migrations/001_initial_schema.sql
+alembic upgrade head
 
 # 8. 启动服务测试
-docker-compose up -d
+WEB_PORT=3001 docker compose -f infra/docker/compose.yml up -d
 curl http://localhost:8000/health
 ```
 
diff --git a/scripts/cleanup_generated_files.py b/scripts/cleanup_generated_files.py
new file mode 100644
index 000000000..fe102b79f
--- /dev/null
+++ b/scripts/cleanup_generated_files.py
@@ -0,0 +1,75 @@
+"""Clean local generated-files storage with a dry-run-first workflow."""
+
+from __future__ import annotations
+
+import argparse
+import os
+import time
+from pathlib import Path
+
+
+def parse_args() -> argparse.Namespace:
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument(
+        "--dir",
+        default=os.getenv("GENERATED_FILES_DIR", "/app/generated"),
+        help="Generated files root directory. Defaults to GENERATED_FILES_DIR or /app/generated.",
+    )
+    parser.add_argument(
+        "--days",
+        type=int,
+        default=7,
+        help="Delete files older than this many days. Defaults to 7.",
+    )
+    parser.add_argument(
+        "--apply",
+        action="store_true",
+        help="Actually delete files. Without this flag the script only prints a dry run.",
+    )
+    return parser.parse_args()
+
+
+def iter_expired_files(root: Path, cutoff_epoch: float):
+    for path in root.rglob("*"):
+        if path.is_file() and path.stat().st_mtime < cutoff_epoch:
+            yield path
+
+
+def remove_empty_dirs(root: Path) -> None:
+    for path in sorted((p for p in root.rglob("*") if p.is_dir()), key=lambda p: len(p.parts), reverse=True):
+        try:
+            path.rmdir()
+        except OSError:
+            pass
+
+
+def main() -> int:
+    args = parse_args()
+    root = Path(args.dir).resolve()
+    if not root.exists():
+        print(f"generated files directory does not exist: {root}")
+        return 0
+    if not root.is_dir():
+        raise SystemExit(f"not a directory: {root}")
+    if args.days < 1:
+        raise SystemExit("--days must be >= 1")
+
+    cutoff_epoch = time.time() - args.days * 24 * 60 * 60
+    expired_files = list(iter_expired_files(root, cutoff_epoch))
+    total_bytes = sum(path.stat().st_size for path in expired_files)
+
+    mode = "APPLY" if args.apply else "DRY-RUN"
+    print(f"mode={mode} root={root} days={args.days} files={len(expired_files)} bytes={total_bytes}")
+    for path in expired_files:
+        print(path)
+        if args.apply:
+            path.unlink()
+
+    if args.apply:
+        remove_empty_dirs(root)
+
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())