SEO Extras Plugin
The seo-extras plugin provides Yoast-like per-content SEO overrides. After activation, content edit pages receive an optional SEO panel with fields for SEO title, SEO description, Open Graph image, and robots directives.
Why It Exists
Core SEO metadata is inferred from content fields:
| SEO field | Default source |
|---|---|
| Description and Open Graph description | Content.Excerpt, truncated when needed. |
| Open Graph image | Content.ImageURL. |
| Title and Open Graph title | Content.Title. |
| Robots | index, follow. |
Some editorial workflows need a separate SEO title, custom description, special share image, or noindex directive without changing the visible page content.
Storage
The plugin stores values in gp_content_meta with _seo_ keys:
| Field | Meta key |
|---|---|
| SEO Title | _seo_title |
| SEO Description | _seo_description |
| Open Graph Image | _seo_image |
| Robots | _seo_robots |
Empty fields are deleted rather than stored as empty strings. This keeps the meaning clear: missing metadata means use the default SEO output.
Hooks
The plugin is implemented without core schema changes. It subscribes to:
admin.content_form.fields -> render SEO panel
admin.content.saved -> persist submitted values
seo.content.meta -> patch SEOMeta
BaseTheme-based themes receive the SEO patch automatically. Custom PageData themes must call coreTheme.ApplyContentMetaSEO when building page SEO.
Custom SEO Plugins
Additional SEO plugins can subscribe to the same seo.content.meta filter. Priority order controls how multiple plugins compose their changes.