go-common中增加mcp抽离成通用方法(编排由业务方自行处理)

factory/factory.go

@@ -13,6 +13,7 @@ import (
 	commonhttp "git.toowon.com/jimmy/go-common/http"
 	"git.toowon.com/jimmy/go-common/i18n"
 	"git.toowon.com/jimmy/go-common/logger"
+	"git.toowon.com/jimmy/go-common/mcp"
 	"git.toowon.com/jimmy/go-common/middleware"
 	"git.toowon.com/jimmy/go-common/migration"
 	"git.toowon.com/jimmy/go-common/sms"
@@ -40,6 +41,7 @@ type Factory struct {
 	redis  *redis.Client
 	i18n   *i18n.I18n
 	chain  *middleware.Chain
+	mcp    mcp.Manager
 
 	mu sync.Mutex
 }
@@ -412,6 +414,29 @@ func (f *Factory) getI18nUnlocked() (*i18n.I18n, error) {
 	return i, nil
 }
 
+func (f *Factory) getMCP() (mcp.Manager, error) {
+	if f.mcp != nil {
+		return f.mcp, nil
+	}
+	f.mu.Lock()
+	defer f.mu.Unlock()
+	if f.mcp != nil {
+		return f.mcp, nil
+	}
+	if f.cfg == nil || f.cfg.MCP == nil {
+		return nil, fmt.Errorf("mcp config is nil")
+	}
+	l, _ := f.getLoggerUnlocked()
+	f.mcp = mcp.NewManager(l, f.cfg.MCP)
+	return f.mcp, nil
+}
+
+// MCP 获取 MCP 工具子系统对象（ListTools / CallTool）。
+// 本库只做 MCP Client（发现+调用工具）；路由/抽参/编排逻辑由业务侧基于此对象实现。
+func (f *Factory) MCP() (mcp.Manager, error) {
+	return f.getMCP()
+}
+
 // Migrator 创建迁移器并加载指定目录下的 SQL 文件
 func (f *Factory) Migrator(migrationsDir string) (*migration.Migrator, error) {
 	db, err := f.getDatabase()