Reference non-text documents in chat/composer

I find myself, wanting to @ documents to reference them, but NOT to pull their bodies into the chat context. For example:

“Add @test.pdf to the list of values to be tested using relative paths.”

This currently fails making the referenced document just disappear from chat/composer. I assume this is because referencing a document and pulling it into context is the same feature. If non-text documents could be referenced but not pulled into context by the @ mechanism, this would. be helpful.