Data table text I/O package?

I do quite a lot of work, where I manipulate data stored in (tabulator
separated) text files [1]. Does anybody know of a package which
handles the inclusion of a header line with the column names in an
elegant way? It should preferably include automated testing that the
header is correct, when a file is opened, and automated creation of
the header when a file is created.

TIA,

Jacob

[1] Yes, I know that binary files are faster to read and write, but
they complicate file transfer between different platforms and
"visual inspection" of the data.

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