Netlify CMS is confusing

Setting up Netlify CMS has been interesting since the configuration is in YAML and the custom shortcode plugins have very unclear errors:

Sent invalid data to remark. Plugin: twitter. Value: {{< twitter 1034811356611051520 >}}. Data: {"tid":"1034811356611051520"} 2 remarkShortcodes.js:53:16

Also apparently it needs identifier_field: "Title" since my frontmatter variables are all capitalized, and Netlify CMS looks for title by default.