Finalize inbox artifacts and error protocol

internal/cli/inbox/send.go

@@ -23,6 +23,7 @@ type sendOptions struct {
 	bodyFile    string
 	payloadJSON string
 	priority    string
+	artifacts   artifactOptions
 }
 
 func newSendCmd(root *rootOptions) *cobra.Command {
@@ -39,16 +40,20 @@ func newSendCmd(root *rootOptions) *cobra.Command {
 				from = root.agent
 			}
 			if from == "" {
-				return fmt.Errorf("from agent is required")
+				return protocol.InvalidInput("from agent is required", nil)
 			}
 			if opts.threadID == "" && opts.subject == "" {
-				return fmt.Errorf("subject is required when creating a new thread")
+				return protocol.InvalidInput("subject is required when creating a new thread", nil)
 			}
 
 			body, err := resolveBodyValue(opts.body, opts.bodyFile)
 			if err != nil {
 				return err
 			}
+			artifacts, err := resolveArtifacts(opts.artifacts)
+			if err != nil {
+				return err
+			}
 
 			sqlDB, err := db.Open(ctx, root.dbPath)
 			if err != nil {
@@ -69,6 +74,7 @@ func newSendCmd(root *rootOptions) *cobra.Command {
 				Body:        body,
 				PayloadJSON: opts.payloadJSON,
 				Priority:    opts.priority,
+				Artifacts:   artifacts,
 			})
 			if err != nil {
 				return err
@@ -104,6 +110,7 @@ func newSendCmd(root *rootOptions) *cobra.Command {
 	cmd.Flags().StringVar(&opts.bodyFile, "body-file", "", "Read message body from file")
 	cmd.Flags().StringVar(&opts.payloadJSON, "payload-json", "", "Structured payload JSON string")
 	cmd.Flags().StringVar(&opts.priority, "priority", "normal", "Thread priority")
+	addArtifactFlags(cmd, &opts.artifacts)
 
 	_ = cmd.MarkFlagRequired("to")