feat: implement hgctl agent & mcp add subcommand (#3051)

hgctl/pkg/agent/base.go

@@ -0,0 +1,61 @@
+// Copyright (c) 2025 Alibaba Group Holding Ltd.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package agent
+
+import (
+	"fmt"
+	"os"
+)
+
+const (
+	AgentBinaryName  = "claude"
+	BinaryVersion    = "0.1.0"
+	DevVersion       = "dev"
+	NodeLeastVersion = 18
+	AgentInstallCmd  = "npm install -g @anthropic-ai/claude-code"
+	AgentReleasePage = "https://docs.claude.com/en/docs/claude-code/setup"
+)
+
+// set up the core env
+// 1. check if npm is installed
+// 2. check the npm version
+// 3. install hgctl-agent
+func getAgent() *AgenticCore {
+	if !checkAgentInstallStatus() {
+		fmt.Println("⚠️ Prerequisites not satisfied. Exiting...")
+		// exit directly
+		os.Exit(1)
+	}
+
+	return NewAgenticCore()
+}
+
+func checkAgentInstallStatus() bool {
+	// TODO: Support cross-platform:windows
+
+	if !checkNodeInstall() {
+		if err := promptNodeInstall(); err != nil {
+			return false
+		}
+	}
+
+	if !checkAgentInstall() {
+		if err := promptAgentInstall(); err != nil {
+			return false
+		}
+	}
+
+	return true
+}