feat(init): add --mcp-client flag to configure MCP during project init

- Adds --mcp-client flag to supabase init (e.g., --mcp-client=claude-code)
- Wires to internal MCP setup after project scaffolding
- Addresses review feedback to avoid a top-level mcp command for config

Author: Rodriguespn

cmd/init.go

@@ -9,6 +9,7 @@ import (
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	_init "github.com/supabase/cli/internal/init"
+	mcpinit "github.com/supabase/cli/internal/mcp/init"
 	"github.com/supabase/cli/internal/utils"
 )
 
@@ -34,16 +35,29 @@ var (
 			}
 		},
 		RunE: func(cmd *cobra.Command, args []string) error {
-			fsys := afero.NewOsFs()
-			if !cmd.Flags().Changed("with-vscode-settings") && !cmd.Flags().Changed("with-vscode-workspace") {
-				createVscodeSettings = nil
-			}
+				fsys := afero.NewOsFs()
+				if !cmd.Flags().Changed("with-vscode-settings") && !cmd.Flags().Changed("with-vscode-workspace") {
+					createVscodeSettings = nil
+				}
 
-			if !cmd.Flags().Changed("with-intellij-settings") {
-				createIntellijSettings = nil
-			}
-			ctx, _ := signal.NotifyContext(cmd.Context(), os.Interrupt)
-			return _init.Run(ctx, fsys, createVscodeSettings, createIntellijSettings, initParams)
+				if !cmd.Flags().Changed("with-intellij-settings") {
+					createIntellijSettings = nil
+				}
+				ctx, _ := signal.NotifyContext(cmd.Context(), os.Interrupt)
+
+				// Run core project init first
+				if err := _init.Run(ctx, fsys, createVscodeSettings, createIntellijSettings, initParams); err != nil {
+					return err
+				}
+
+				// Optionally configure MCP client if flag is provided
+				mcpClient, _ := cmd.Flags().GetString("mcp-client")
+				if mcpClient != "" {
+					if err := mcpinit.Run(ctx, fsys, mcpClient); err != nil {
+						return err
+					}
+				}
+				return nil
 		},
 		PostRun: func(cmd *cobra.Command, args []string) {
 			fmt.Println("Finished " + utils.Aqua("supabase init") + ".")
@@ -59,5 +73,6 @@ func init() {
 	flags.BoolVar(createIntellijSettings, "with-intellij-settings", false, "Generate IntelliJ IDEA settings for Deno.")
 	flags.BoolVar(&initParams.UseOrioleDB, "use-orioledb", false, "Use OrioleDB storage engine for Postgres.")
 	flags.BoolVar(&initParams.Overwrite, "force", false, "Overwrite existing "+utils.ConfigPath+".")
+	flags.String("mcp-client", "", "Configure Supabase MCP for a client (e.g., claude-code, cursor, vscode). Runs after project init if provided.")
 	rootCmd.AddCommand(initCmd)
 }