CB Activity API usage update

It's just conditioning to make sure the code action is only applied to activity post URL. Routing works with segments which are just an array. The array index is as follows.

0 = post
1 = post id

The routing in CB Activity doesn't generate stream URLs as it never has to since streams aren't directly linked to. It generates URLs for the following.

Activity Post URL
Activity Embed URL
Activity Hashtag URL
Comment Post URL
Notification URL

Could you test the rewrite auto action in a CB Activity menu item limited to only one post ?

It seems to work fine within the modal share window for all menu items with several posts, but when I use a menu to display a single post, the url is rewritten for the browser window but not within the modal share window

Strange and I cannot figure why ?

Also on a css detail, there is a p-0 within cassiopeia css template which affects the share window

I don't think Joomla menu items go through rewrite rules. I believe they're supposed to just show the menu alias. So it may not be possible to do anything about that. I'm not so sure it's even necessary to be adding anything extra to the URL as semantic URLs aren't really relevant to SEO anymore. It's more important to have JSON-LD structured data to describe pages to search engines (there's Joomla 3rd party extensions for this or you can output it using CB Auto Actions).

Also on a css detail, there is a p-0 within cassiopeia css template which affects the share window

Works fine on our demo site. I suspect you have a style conflict coming from elsewhere. There's supposed to be a p-0 class on the modal window. The padding is added on various elements in the modal window. If you had custom CSS for CB Activity 5.0 you may want to remove it and re-add whatever is still relevant.

The issue is that all css within the modal is with pl and pr instead of ps and pe for new bootstrap 5 with joomla 5

Regarding ld+json we already use them for main pages with the extension Google Structured Data but there does not seem to support CB and CB activity.

How could I add this to posts with an autoaction ?

The issue is that all css within the modal is with pl and pr instead of ps and pe for new bootstrap 5 with joomla 5

That's because we use Bootstrap 4. Regardless I am having zero conflicts with Joomla's default template which is Bootstrap 5 so you've a CSS conflict from your template itself.

Regarding ld+json we already use them for main pages with the extension Google Structured Data but there does not seem to support CB and CB activity.

You don't need special support for it. It's just a JSON array. You can output it on any display trigger using CB Auto Actions and a Code action as Code action can output to the header. See Google's documentation for how to setup the JSON array.

developers.google.com/search/docs/appearance/structured-data/intro-structured-data

Below is documentation for the schema's Google supports.

developers.google.com/search/docs/appearance/structured-data/search-gallery

That's because we use Bootstrap 4. Regardless I am having zero conflicts with Joomla's default template which is Bootstrap 5 so you've a CSS conflict from your template itself.

You're right, there is zero conflict if I activate Bootstrap 4 for CB. But doing this messes everything with Joomla Cassiopeia standard template and Bootstrap 5
As CB is used nearly everywhere to connect, bootstrap is loaded twice, this makes the pages bigger and messes everything.
Could be good to have a solution for only Bootstrap 5 to not overload pages ? or at least to deal with the changes such as ps ms and so on