P0.1: Repository and module setup

Go module, Makefile with standard targets, golangci-lint v2 config,
CLAUDE.md, and empty CLI/agent binaries. Build, vet, and lint all pass.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

cmd/mcp-agent/main.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	version = "dev"
+	cfgPath string
+)
+
+func main() {
+	root := &cobra.Command{
+		Use:   "mcp-agent",
+		Short: "Metacircular Control Plane agent",
+	}
+	root.PersistentFlags().StringVarP(&cfgPath, "config", "c", "", "config file path")
+
+	root.AddCommand(&cobra.Command{
+		Use:   "version",
+		Short: "Print version",
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Println(version)
+		},
+	})
+
+	if err := root.Execute(); err != nil {
+		os.Exit(1)
+	}
+}

cmd/mcp/main.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	version = "dev"
+	cfgPath string
+)
+
+func main() {
+	root := &cobra.Command{
+		Use:   "mcp",
+		Short: "Metacircular Control Plane CLI",
+	}
+	root.PersistentFlags().StringVarP(&cfgPath, "config", "c", "", "config file path")
+
+	root.AddCommand(&cobra.Command{
+		Use:   "version",
+		Short: "Print version",
+		Run: func(cmd *cobra.Command, args []string) {
+			fmt.Println(version)
+		},
+	})
+
+	if err := root.Execute(); err != nil {
+		os.Exit(1)
+	}
+}