Stop and resume MRU tracking before/after a grep

Hi, is there a way to stop recording files in MRU completely before one does a grep from vim? As of now, browsing grep results from quickfix window results in polluting the MRU files. Ideally I wouldn't want to affect/pollute MRU with not-so-important files that got "opened" during a batch search-and-replace. Grep is just an example, all that is needed is a global variable to set/reset MRU history updates. Thanks!

Start by locating MRU history updates and the quickfix/grep path described in the issue. Verify how browsing grep results changes MRU, then define done as a global setting that can disable and re-enable those updates without recording files opened during batch searches.

Written by the indexing model from the issue text.