Get IDF File with 'autosize' Filled In

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I'd like to run a simulation that has several values being autosized, but then get an idf file out that is exactly the same, but has the autosized values hard entered. EnergyPlus must have those values to be able to run, but I don't know if it's ever in an IDF format, or they are just adding in after the input file has been processed. If the former, then there must at least be a temporary file somewhere that would serve my needs, right?

This is related to this previous question, but hopefully with a different answer: https://unmethours.com/question/23414...