I think we might have a decent solution. It’s not exactly what you are asking for, but I’m hoping it’s close enough. See what you think:
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Open the category settings for #wishlist and click on the “Topic Template” tab. Add a short notice like
PLEASE SEARCH FOR SIMILAR TOPICS BEFORE POSTINGand save the change -
Next go to
/admin/logs/watched_words/action/blockand add the same short notice to the list of blocked words. It should look like this: -
With this setup, all users will have the text
PLEASE SEARCH FOR SIMILAR TOPICS BEFORE POSTINGautomatically inserted into their composer when trying to create a topic in #wishlist. Thanks to the blocked words feature, the post will not go through unless the user has deleted that text. They will see a notification like this until they remove the text:This should make for a fairly strong reminder since it requires a little more action than closing the suggested topics pop-up.
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There is a site setting called
limit_suggested_to_categorywhich should restrict the similar topics to the category in which the post is being created. Currently there is no category-level option to specify which categories should be included in the similar topics list.

