<?php
/*
  Plugin Name: My Custom Post Type
  Description: Minimal code to add custom post type in a plugin
  Version: 0.01
  Author: Myself
*/

add_action( 'init', 'my_custom_plugin_create_post_type' );

function my_custom_plugin_create_post_type() {
    register_post_type( 'team_member',
        'public' => true,
        'has_archive' => true,
        /* more settings for your custom post type here */
      )
);