Add cmd, proto, and generated gRPC code

Fix .gitignore pattern that was excluding mc-proxy subdirectories.

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

cmd/mc-proxy/main.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"fmt"
+	"os"
+)
+
+var version = "dev"
+
+func main() {
+	if err := run(); err != nil {
+		fmt.Fprintf(os.Stderr, "mc-proxy: %v\n", err)
+		os.Exit(1)
+	}
+}
+
+func run() error {
+	return rootCmd().Execute()
+}

cmd/mc-proxy/root.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"github.com/spf13/cobra"
+)
+
+func rootCmd() *cobra.Command {
+	cmd := &cobra.Command{
+		Use:     "mc-proxy",
+		Short:   "TLS proxy and router for Metacircular Dynamics services",
+		Version: version,
+	}
+
+	cmd.AddCommand(serverCmd())
+
+	return cmd
+}

cmd/mc-proxy/server.go

@@ -0,0 +1,89 @@
+package main
+
+import (
+	"context"
+	"log/slog"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/spf13/cobra"
+
+	"git.wntrmute.dev/kyle/mc-proxy/internal/config"
+	"git.wntrmute.dev/kyle/mc-proxy/internal/grpcserver"
+	"git.wntrmute.dev/kyle/mc-proxy/internal/server"
+)
+
+func serverCmd() *cobra.Command {
+	var configPath string
+
+	cmd := &cobra.Command{
+		Use:   "server",
+		Short: "Start the proxy server",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			cfg, err := config.Load(configPath)
+			if err != nil {
+				return err
+			}
+
+			logger := slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{
+				Level: parseLogLevel(cfg.Log.Level),
+			}))
+
+			srv, err := server.New(cfg, logger, version)
+			if err != nil {
+				return err
+			}
+
+			ctx, cancel := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+			defer cancel()
+
+			// Start gRPC admin API if configured.
+			if cfg.GRPC.Addr != "" {
+				grpcSrv, ln, err := grpcserver.New(cfg.GRPC, srv, logger)
+				if err != nil {
+					return err
+				}
+				logger.Info("gRPC admin API listening", "addr", ln.Addr())
+				go func() {
+					if err := grpcSrv.Serve(ln); err != nil {
+						logger.Error("gRPC server error", "error", err)
+					}
+				}()
+				defer grpcSrv.GracefulStop()
+			}
+
+			// SIGHUP reloads the GeoIP database.
+			sighup := make(chan os.Signal, 1)
+			signal.Notify(sighup, syscall.SIGHUP)
+			go func() {
+				for range sighup {
+					logger.Info("received SIGHUP, reloading GeoIP database")
+					if err := srv.ReloadGeoIP(); err != nil {
+						logger.Error("failed to reload GeoIP database", "error", err)
+					}
+				}
+			}()
+
+			logger.Info("mc-proxy starting", "version", version)
+			return srv.Run(ctx)
+		},
+	}
+
+	cmd.Flags().StringVarP(&configPath, "config", "c", "mc-proxy.toml", "path to configuration file")
+
+	return cmd
+}
+
+func parseLogLevel(s string) slog.Level {
+	switch s {
+	case "debug":
+		return slog.LevelDebug
+	case "warn":
+		return slog.LevelWarn
+	case "error":
+		return slog.LevelError
+	default:
+		return slog.LevelInfo
+	}
+}