add --platform to build and deploy commands

go/cli/cmd/kagent/main.go

@@ -280,6 +280,7 @@ Examples:
 	// Add flags for build command
 	buildCmd.Flags().StringVar(&buildCfg.Image, "image", "", "Full image specification (e.g., ghcr.io/myorg/my-agent:v1.0.0)")
 	buildCmd.Flags().BoolVar(&buildCfg.Push, "push", false, "Push the image to the registry")
+	buildCmd.Flags().StringVar(&buildCfg.Platform, "platform", "", "Target platform for Docker build (e.g., linux/amd64, linux/arm64)")
 
 	deployCfg := &cli.DeployCfg{
 		Config: cfg,
@@ -335,6 +336,7 @@ Examples:
 	deployCmd.Flags().StringVar(&deployCfg.EnvFile, "env-file", "", "Path to .env file containing environment variables (including API keys)")
 	deployCmd.Flags().StringVar(&deployCfg.Config.Namespace, "namespace", "", "Kubernetes namespace to deploy to")
 	deployCmd.Flags().BoolVar(&deployCfg.DryRun, "dry-run", false, "Output YAML manifests without applying them to the cluster")
+	deployCmd.Flags().StringVar(&deployCfg.Platform, "platform", "", "Target platform for Docker build (e.g., linux/amd64, linux/arm64)")
 
 	// add-mcp command
 	addMcpCfg := &cli.AddMcpCfg{Config: cfg}

go/cli/internal/cli/agent/build.go

@@ -15,6 +15,7 @@ type BuildCfg struct {
 	ProjectDir string
 	Image      string
 	Push       bool
+	Platform   string
 	Config     *config.Config
 }
 
@@ -52,7 +53,11 @@ func BuildCmd(cfg *BuildCfg) error {
 	}
 
 	imageName := constructImageName(cfg)
-	if err := docker.Build(imageName, "."); err != nil {
+	var extraArgs []string
+	if cfg.Platform != "" {
+		extraArgs = append(extraArgs, "--platform", cfg.Platform)
+	}
+	if err := docker.Build(imageName, ".", extraArgs...); err != nil {
 		return fmt.Errorf("failed to build Docker image: %v", err)
 	}
 
@@ -144,7 +149,11 @@ func buildMcpServerImages(cfg *BuildCfg, manifest *common.AgentManifest) error {
 		imageName := constructMcpServerImageName(cfg, srv.Name)
 		docker := commonexec.NewDockerExecutor(cfg.Config.Verbose, mcpServerDir)
 
-		if err := docker.Build(imageName, "."); err != nil {
+		var extraArgs []string
+		if cfg.Platform != "" {
+			extraArgs = append(extraArgs, "--platform", cfg.Platform)
+		}
+		if err := docker.Build(imageName, ".", extraArgs...); err != nil {
 			return fmt.Errorf("docker build failed for %s: %v", srv.Name, err)
 		}
 	}

go/cli/internal/cli/agent/deploy.go

@@ -57,6 +57,9 @@ type DeployCfg struct {
 	// A Secret will be created with these values and mounted in the agent deployment.
 	EnvFile string
 
+	// Platform specifies the target platform for Docker builds (e.g., "linux/amd64", "linux/arm64")
+	Platform string
+
 	// Config contains CLI configuration (namespace, verbosity, etc.)
 	Config *config.Config
 
@@ -153,6 +156,7 @@ func buildAndPushImage(cfg *DeployCfg) error {
 		ProjectDir: cfg.ProjectDir,
 		Image:      cfg.Image,
 		Push:       true, // Always push when deploying
+		Platform:   cfg.Platform,
 		Config:     cfg.Config,
 	}