Finalize inbox artifacts and error protocol

internal/cli/inbox/cancel.go

@@ -11,9 +11,10 @@ import (
 )
 
 type cancelOptions struct {
-	agent    string
-	threadID string
-	reason   string
+	agent     string
+	threadID  string
+	reason    string
+	artifacts artifactOptions
 }
 
 func newCancelCmd(root *rootOptions) *cobra.Command {
@@ -30,7 +31,11 @@ func newCancelCmd(root *rootOptions) *cobra.Command {
 				agent = root.agent
 			}
 			if agent == "" {
-				return fmt.Errorf("agent is required")
+				return protocol.InvalidInput("agent is required", nil)
+			}
+			artifacts, err := resolveArtifacts(opts.artifacts)
+			if err != nil {
+				return err
 			}
 
 			sqlDB, err := db.Open(ctx, root.dbPath)
@@ -41,9 +46,10 @@ func newCancelCmd(root *rootOptions) *cobra.Command {
 
 			s := store.NewInboxStore(sqlDB)
 			thread, message, err := s.CancelThread(ctx, store.CancelInput{
-				ThreadID: opts.threadID,
-				Agent:    agent,
-				Reason:   opts.reason,
+				ThreadID:  opts.threadID,
+				Agent:     agent,
+				Reason:    opts.reason,
+				Artifacts: artifacts,
 			})
 			if err != nil {
 				return err
@@ -70,6 +76,7 @@ func newCancelCmd(root *rootOptions) *cobra.Command {
 	cmd.Flags().StringVar(&opts.agent, "agent", "", "Acting agent")
 	cmd.Flags().StringVar(&opts.threadID, "thread", "", "Thread ID")
 	cmd.Flags().StringVar(&opts.reason, "reason", "", "Cancellation reason")
+	addArtifactFlags(cmd, &opts.artifacts)
 
 	_ = cmd.MarkFlagRequired("thread")