diff --git a/README.md b/README.md
index d598d34..4019d49 100644
--- a/README.md
+++ b/README.md
@@ -26,14 +26,15 @@ go get apigo.cc/go/docDB
 ```go
 import (
     "apigo.cc/go/docDB"
-    "apigo.cc/go/tableDB"
+    "apigo.cc/go/log"
 )
 
-// 创建基础数据库连接 (tableDB 层)
-unauthorizedDB := tableDB.GetDB("sqlite://docs.db", logger)
-
-// 获取 docDB 引擎 (自动完成表结构初始化)
-engine := docDB.GetDB(unauthorizedDB, "./storage_root")
+// 获取 docDB 引擎 (自动完成系统表与业务表初始化)
+// dsn: 数据库连接字符串 (如 sqlite://docs.db)
+// logger: 日志对象
+// redis: 分布式 ID 用的 Redis 地址 (可选)
+// baseDir: 物理文件存储根路径
+engine := docDB.GetDB("sqlite://docs.db", log.DefaultLogger, "localhost:6379", "./storage_root")
 
 // 授权并获取操作句柄
 db := engine.Auth("user_123")
@@ -57,10 +58,25 @@ db := engine.Auth("user_123")
 ### 3. 生命周期钩子 (Hooks)
 
 ```go
-engine.Hooks.OnCreatedDoc = func(doc *docDB.Document) { /* ... */ }
-engine.Hooks.OnUpdatedDoc = func(doc *docDB.Document) { /* ... */ }
-engine.Hooks.OnRemoved = func(path string) { /* ... */ }
-engine.Hooks.OnMoved = func(oldPath, newPath string) { /* ... */ }
+// 监听新文档创建
+engine.Hooks.OnCreatedDoc = func(doc *docDB.Document) {
+    fmt.Println("New doc created:", doc.Path)
+}
+
+// 监听内容更新 (SetDoc 触发，SetMeta 不触发)
+engine.Hooks.OnUpdatedDoc = func(doc *docDB.Document) {
+    fmt.Println("Doc updated:", doc.Path, "Version:", doc.Version)
+}
+
+// 监听文档删除
+engine.Hooks.OnRemoved = func(path string) {
+    fmt.Println("Doc removed:", path)
+}
+
+// 监听文档重命名
+engine.Hooks.OnMoved = func(oldPath, newPath string) {
+    fmt.Println("Doc moved from", oldPath, "to", newPath)
+}
 ```
 
 ## 📝 数据结构
@@ -73,8 +89,11 @@ engine.Hooks.OnMoved = func(oldPath, newPath string) { /* ... */ }
 | `TextContent` | `string` | 文档正文 |
 | `Version` | `uint64` | 单调递增的版本号 |
 | `ToC` | `[]ToCNode` | 自动生成的目录树 |
+| `CreateTime` | `int64` | 创建时间 (自动维护) |
+| `UpdateTime` | `int64` | 最后更新时间 (自动维护) |
 
 ## 💡 注意事项
 
 - **ID 封装**：底层依然使用唯一 ID 维护物理存储，但对 API 调用者完全隐藏。
-- **自动初始化**：`GetDB` 会自动维护 `_Doc` 和 `_Doc_History` 的表结构。
+- **自动初始化**：`GetDB` 内部使用 `_system` 权限自动维护系统表及 `_Doc`, `_Doc_History` 的结构。
+- **元数据自动维护**：`Creator`, `Updater`, `CreateTime`, `UpdateTime` 由底层 `tableDB` 统一管控，无需显式设置。
diff --git a/doc.go b/doc.go
index 3ba8084..f7f3951 100644
--- a/doc.go
+++ b/doc.go
@@ -6,11 +6,10 @@ import (
 	"os"
 	"path/filepath"
 	"strings"
-	"time"
 
 	"apigo.cc/go/cast"
 	"apigo.cc/go/file"
-	"apigo.cc/go/id"
+	"apigo.cc/go/log"
 	"apigo.cc/go/tableDB"
 )
 
@@ -55,10 +54,10 @@ type Document struct {
 	AsFile        bool           // 是否以文件存储
 	Version       uint64         // 版本号
 	IsSecret      bool           // 是否加密
-	CreateTime    int64          // 创建时间
-	UpdateTime    int64          // 更新时间
-	Creator       string         // 创建人 ID
-	Updater       string         // 更新人 ID
+	CreateTime    int64          // 创建时间 (自动维护)
+	UpdateTime    int64          // 更新时间 (自动维护)
+	Creator       string         // 创建人 ID (自动维护)
+	Updater       string         // 更新人 ID (自动维护)
 }
 
 // ToCNode 目录树节点
@@ -69,9 +68,11 @@ type ToCNode struct {
 }
 
 // GetDB 获取 DocDBUnauthorized 实例并初始化表结构
-func GetDB(db *tableDB.TableDBUnauthorized, baseDir string) *DocDBUnauthorized {
-	sys := db.Auth(tableDB.SystemUserID)
+func GetDB(dsn string, logger *log.Logger, redis string, baseDir string) *DocDBUnauthorized {
+	unauthorizedDB := tableDB.GetDB(dsn, logger, redis)
+	sys := unauthorizedDB.Auth(tableDB.SystemUserID)
 	
+	// 确保系统基础表存在
 	if raw, err := sys.GetRawDB(); err == nil {
 		_ = raw.Sync(tableDB.SystemSchema)
 	}
@@ -112,7 +113,7 @@ func GetDB(db *tableDB.TableDBUnauthorized, baseDir string) *DocDBUnauthorized {
 	initTable("_Doc_History")
 
 	return &DocDBUnauthorized{
-		db:      db,
+		db:      unauthorizedDB,
 		baseDir: baseDir,
 		Hooks:   &Hooks{},
 	}
@@ -131,7 +132,6 @@ func (d *DocDBUnauthorized) Auth(userID string) *DocDB {
 
 // SetDoc 更新内容 (强制提升版本号，自动保存历史)
 func (a *DocDB) SetDoc(docObj *Document) error {
-	now := time.Now().UnixMilli()
 	existing, _ := a.getRaw(docObj.Path)
 	
 	isUpdate := existing != nil
@@ -141,20 +141,23 @@ func (a *DocDB) SetDoc(docObj *Document) error {
 		a.archive(existing)
 		internalID = cast.String(existing["id"])
 		docObj.Version = cast.Uint64(existing["version"]) + 1
-		docObj.CreateTime = cast.Int64(existing["createTime"])
-		docObj.Creator = cast.String(existing["creator"])
 	} else {
-		internalID = id.MakeID(10)
 		docObj.Version = 1
-		docObj.CreateTime = now
-		docObj.Creator = a.userID
 	}
 
-	docObj.UpdateTime = now
-	docObj.Updater = a.userID
-
 	// 处理文件落盘
 	if docObj.BinaryContent != nil {
+		if internalID == "" {
+			// 先执行一次空的 Set 来占坑获取 ID
+			placeholder := map[string]any{"path": docObj.Path, "version": docObj.Version}
+			_ = a.table.Set(placeholder)
+			// 重新获取
+			existing, _ = a.getRaw(docObj.Path)
+			if existing != nil {
+				internalID = cast.String(existing["id"])
+			}
+		}
+
 		if err := a.saveFile(internalID, docObj); err != nil {
 			return err
 		}
@@ -187,12 +190,9 @@ func (a *DocDB) SetMeta(path string, meta map[string]any) error {
 		return fmt.Errorf("document not found: %s", path)
 	}
 
-	now := time.Now().UnixMilli()
 	for k, v := range meta {
 		existing[k] = v
 	}
-	existing["updateTime"] = now
-	existing["updater"] = a.userID
 
 	return a.table.Set(existing)
 }
@@ -205,8 +205,6 @@ func (a *DocDB) Move(oldPath, newPath string) error {
 	}
 
 	existing["path"] = newPath
-	existing["updateTime"] = time.Now().UnixMilli()
-	existing["updater"] = a.userID
 
 	err = a.table.Set(existing)
 	if err == nil {
@@ -238,7 +236,9 @@ func (a *DocDB) archive(existing map[string]any) {
 func (a *DocDB) toRecord(internalID string, docObj *Document) map[string]any {
 	record := make(map[string]any)
 	cast.Convert(&record, docObj)
-	record["id"] = internalID
+	if internalID != "" {
+		record["id"] = internalID
+	}
 	delete(record, "binaryContent")
 	return record
 }
diff --git a/doc_test.go b/doc_test.go
index 6488916..4dc73e0 100644
--- a/doc_test.go
+++ b/doc_test.go
@@ -6,7 +6,6 @@ import (
 	"testing"
 
 	"apigo.cc/go/log"
-	"apigo.cc/go/tableDB"
 )
 
 func TestDocDB(t *testing.T) {
@@ -17,9 +16,8 @@ func TestDocDB(t *testing.T) {
 	os.RemoveAll("./test_docs")
 	defer os.RemoveAll("./test_docs")
 
-	unauthorizedDB := tableDB.GetDB("sqlite://"+dbFile, logger)
-	
-	docDBInst := GetDB(unauthorizedDB, "./test_docs")
+	// 使用新的 GetDB 入口 (支持 redis 参数)
+	docDBInst := GetDB("sqlite://"+dbFile, logger, "", "./test_docs")
 	app := docDBInst.Auth("user1")
 
 	var createdCalled, updatedCalled, removedCalled, movedCalled bool
@@ -126,3 +124,10 @@ func TestDocDB(t *testing.T) {
 		t.Fatalf("Expected version 2, got %d", lastHist.Version)
 	}
 }
+
+func BenchmarkExtractToC(b *testing.B) {
+	content := "# H1\n## H1.1\n### H1.1.1\n" + strings.Repeat("Some content\n", 100) + "# H2\n## H2.1\n"
+	for i := 0; i < b.N; i++ {
+		_ = ExtractToC(content)
+	}
+}
diff --git a/go.mod b/go.mod
index 901d3ea..fafc151 100644
--- a/go.mod
+++ b/go.mod
@@ -5,7 +5,6 @@ go 1.25.0
 require (
 	apigo.cc/go/cast v1.3.2
 	apigo.cc/go/file v1.3.1
-	apigo.cc/go/id v1.3.0
 	apigo.cc/go/log v1.3.2
 	apigo.cc/go/tableDB v1.1.6
 )
@@ -15,6 +14,7 @@ require (
 	apigo.cc/go/crypto v1.3.0 // indirect
 	apigo.cc/go/db v1.3.1 // indirect
 	apigo.cc/go/encoding v1.3.0 // indirect
+	apigo.cc/go/id v1.3.0 // indirect
 	apigo.cc/go/rand v1.3.0 // indirect
 	apigo.cc/go/redis v1.3.0 // indirect
 	apigo.cc/go/safe v1.3.0 // indirect