logon.lst file format) and thought I came up with a cool new idea. Nope.
It's already a thing:
http://jsonlines.org/
http://ndjson.org/

Here's a library to append-to and read these "JSON Lines", "NDJSON" and
"LDJSON" files.

On underscores versus dashes in filenames:
Apparently my tendency is to use underscores in source/script filenames, while
other CVS contributors (e.g. mcmlxxix) prefer dashes (e.g. json-*.js), so the
filenames are starting to look a bit bipolar. Oh well. :-(