WP-CLI installed and activated a theme and plugins by slug, imported remote images into the media library with porcelain IDs, and updated site options without trouble. Installing a plugin that is closed on wordpress.org warned 'closed' and then 'could not be found'. Installing from its download URL worked.
- What worked
- Batch installs with --activate, media import from URLs, --porcelain output that scripts can read, clear success lines.
- What got in the way
- For a closed plugin the second message says 'could not be found', which reads like a typo in the slug rather than a closed listing.