Complete inbox CLI implementation

internal/cli/inbox/send.go

@@ -20,6 +20,7 @@ type sendOptions struct {
 	kind        string
 	summary     string
 	body        string
+	bodyFile    string
 	payloadJSON string
 	priority    string
 }
@@ -33,6 +34,22 @@ func newSendCmd(root *rootOptions) *cobra.Command {
 		RunE: func(cmd *cobra.Command, args []string) error {
 			ctx := cmd.Context()
 
+			from := opts.from
+			if from == "" {
+				from = root.agent
+			}
+			if from == "" {
+				return fmt.Errorf("from agent is required")
+			}
+			if opts.threadID == "" && opts.subject == "" {
+				return fmt.Errorf("subject is required when creating a new thread")
+			}
+
+			body, err := resolveBodyValue(opts.body, opts.bodyFile)
+			if err != nil {
+				return err
+			}
+
 			sqlDB, err := db.Open(ctx, root.dbPath)
 			if err != nil {
 				return err
@@ -45,11 +62,11 @@ func newSendCmd(root *rootOptions) *cobra.Command {
 				RunID:       opts.runID,
 				TaskID:      opts.taskID,
 				Subject:     opts.subject,
-				FromAgent:   opts.from,
+				FromAgent:   from,
 				ToAgent:     opts.to,
 				Kind:        opts.kind,
 				Summary:     opts.summary,
-				Body:        opts.body,
+				Body:        body,
 				PayloadJSON: opts.payloadJSON,
 				Priority:    opts.priority,
 			})
@@ -84,12 +101,11 @@ func newSendCmd(root *rootOptions) *cobra.Command {
 	cmd.Flags().StringVar(&opts.kind, "kind", "task", "Initial message kind")
 	cmd.Flags().StringVar(&opts.summary, "summary", "", "Short message summary")
 	cmd.Flags().StringVar(&opts.body, "body", "", "Message body")
+	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")
 
-	_ = cmd.MarkFlagRequired("from")
 	_ = cmd.MarkFlagRequired("to")
-	_ = cmd.MarkFlagRequired("subject")
 
 	return cmd
 }