[wp-trac] [WordPress Trac] #58123: Indicate when a theme supports the Site editor in the Themes REST API response

[WordPress Trac]

#58123: Indicate when a theme supports the Site editor in the Themes REST API
response
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 Reporter:  grantmkin    |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  Awaiting Review
Component:  REST API     |    Version:
 Severity:  normal       |   Keywords:
  Focuses:  rest-api     |
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 I currently can't find a way to know if the active theme supports the Site
 editor based on the /themes REST API response for that theme.

 We have theme supports data for `block-template-parts` in the response,
 which can be an indication of Site editor support, but use of this doesn't
 seem consistent. For example, Twenty Twenty-Two doesn't declare `block-
 template-parts` support, but it supports using the Site editor.

 One way to know would be to surface the result of
 `WP_Theme::is_block_theme` for each theme (or at least for the active
 theme) in the API response.

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Ticket URL: <https://core.trac.wordpress.org/ticket/58123>
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