Just in case anybody doesn't want to copy this all out to test seeding with tinker, I'll leave this here (I kept the includes there because forgetting to include them myself threw some errors for me).
use App\Models\User;
use App\Models\Category;
use App\Models\Post;

class DatabaseSeeder extends Seeder
{
    /**
     * Seed the application's database.
     *
     * @return void
     */
    public function run()
    {
      User::truncate();
      Post::truncate();
      Category::truncate();

      $user = User::factory()->create();


      $family = Category::create([
        'name' => 'Family',
        'slug' => 'family'
      ]);

      $personal = Category::create([
        'name' => 'Personal',
        'slug' => 'personal'
      ]);

      $work = Category::create([
        'name' => 'Work',
        'slug' => 'work'
      ]);

      Post::create([
        'user_id' => $user->id,
        'category_id' => $family->id,
        'title' => 'My Family Post',
        'slug' => 'my-family-post',
        'excerpt' => 'Lorem ipsum dolar sit amet.',
        'body' => 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.'
      ]);

      Post::create([
        'user_id' => $user->id,
        'category_id' => $personal->id,
        'title' => 'My Personal Post',
        'slug' => 'my-personal-post',
        'excerpt' => 'Lorem ipsum dolar sit amet.',
        'body' => 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.'
      ]);

      Post::create([
        'user_id' => $user->id,
        'category_id' => $work->id,
        'title' => 'My Work Post',
        'slug' => 'my-work-post',
        'excerpt' => 'Lorem ipsum dolar sit amet.',
        'body' => 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.'
      ]);

    }
}
Database Seeding Saves Time

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