Codeplus

Perhaps I should move this topic into 'feature requests' section. I rely on this action a lot in my workflow but I really don't have any idea as to how I can find a solution to this.
 
Another option is to look into building a file filter of my own but my request seems like such a trivial thing to add and Alfred's file filter is staggeringly fast. I doubt my implementation would be as fast.

In a case like @Codeplus's where you're searching file contents, keeping a reference to the original search query would be a significant boon to integration, as you could put it on the find pasteboard and have Preview (and other apps that support NSFindPboard) automatically search for the query when the file actioned in Alfred is opened in the app.
 
More broadly, I'd include the original query with other workflow-specific state that Alfred really should share with the workflow, such as the workflow's data & cache dirs (available) and the keyword used to call an action (not available).

Yes, been wanting this feature for years. Here's my scenario:
Use File Filter to search in a folder and within PDF documents for a work order number. For example: wo 12345 A list of PDF's that contain that number are shown. Open PDF file in Preview. So far, everything works as expected. Then I would like to take the work order number, in this case 12345, and enter it into Preview's search field. But, I don't have access to the original query. It would be nice if Alfred would save the original query as an internal variable when using File Filter, similar to {query}. It doesn't seem like it would be a breaking change if implemented.
 
I have tried using a Keyword first, to grab the original query, but then I have to hit enter to see the results. This breaks backspacing to refine the search.