cara, eu conheci o spartan quando o dev lançou, mas eu confesso que desanimei quando vi a forma como os componentes foram feitos para uso. Ele levou a ideia do shadcn muito a risca pro angular, o que acaba perdendo um pouco a experiência de desenvolvimento.

Olha o uso de um simples alert: https://spartan.ng/components/alert-dialog#usage

import { Component } from '@angular/core';
import {
  BrnAlertDialogContentDirective,
  BrnAlertDialogTriggerDirective,
} from '@spartan-ng/brain/alert-dialog';
import {
  HlmAlertDialogActionButtonDirective,
  HlmAlertDialogCancelButtonDirective,
  HlmAlertDialogComponent,
  HlmAlertDialogContentComponent,
  HlmAlertDialogDescriptionDirective,
  HlmAlertDialogFooterComponent,
  HlmAlertDialogHeaderComponent,
  HlmAlertDialogOverlayDirective,
  HlmAlertDialogTitleDirective,
} from '@spartan-ng/ui-alertdialog-helm';
import { HlmButtonDirective } from '@spartan-ng/ui-button-helm';

@Component({
  selector: 'spartan-alert-dialog-preview',
  standalone: true,
  imports: [
    BrnAlertDialogTriggerDirective,
    BrnAlertDialogContentDirective,

    HlmAlertDialogComponent,
    HlmAlertDialogOverlayDirective,
    HlmAlertDialogHeaderComponent,
    HlmAlertDialogFooterComponent,
    HlmAlertDialogTitleDirective,
    HlmAlertDialogDescriptionDirective,
    HlmAlertDialogCancelButtonDirective,
    HlmAlertDialogActionButtonDirective,
    HlmAlertDialogContentComponent,

    HlmButtonDirective,
  ],
  template: `
    <hlm-alert-dialog>
      <button id="edit-profile" variant="outline" brnAlertDialogTrigger hlmBtn>Delete Account</button>
      <hlm-alert-dialog-content *brnAlertDialogContent="let ctx">
        <hlm-alert-dialog-header>
          <h3 hlmAlertDialogTitle>Are you absolutely sure?</h3>
          <p hlmAlertDialogDescription>
            This action cannot be undone. This will permanently delete your account and remove your data from our
            servers.
          </p>
        </hlm-alert-dialog-header>
        <hlm-alert-dialog-footer>
          <button hlmAlertDialogCancel (click)="ctx.close()">Cancel</button>
          <button hlmAlertDialogAction (click)="ctx.close()">Delete account</button>
        </hlm-alert-dialog-footer>
      </hlm-alert-dialog-content>
    </hlm-alert-dialog>
  `,
})
export class AlertDialogPreviewComponent {}

Agora olha a diferença de uso com o ng-zorro:

https://ng.ant.design/components/modal/en#components-modal-demo-confirm

constructor(private modal: NzModalService) {}

showConfirm(): void {
    this.modal.confirm({
      nzTitle: '<i>Do you Want to delete these items?</i>',
      nzContent: '<b>Some descriptions</b>',
      nzOnOk: () => console.log('OK')
    });
  }

É essa a experiência que queremos levar aos devs com o Zard UI.