Which packages do I need?

I need to make a script that seems like it should already be a package but I do not know what exactly to search for. I would guess this part of the pipe is fairly common. Is there a package in R that does the following.

I have a bunch of csv json and txt file that are read, parsed(weirdly structured), merged if same source, duplicates removed and noted and some summary stats written to file. Then integrity checks are run based on a user editable file and also written to a file. For example, file says all columns named Calories must be positive integer or Time should not be inside certain bounds defined by a long 2 column data.table. assertr? User may need to adjust metadata file or a dataset then rerun checks only on it without wasting time reloading everything. drake? I probably have not planned for everything and more features will be useful.

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