Roll the log file over

that is, don’t let it grow without bound, but instead, once it gets to a certain size, rename it and start a new file.

Consider making the log a sequence of sexprs

rather than lines: this will make it easier for programs to parse … and it seems I’m writing more programs that want to parse it.

Get rid of “in/on” in the output of the “seen” command

surely I can figure out which preposition is appropriate.

Run with “–warn info”

… and fix the various lint-like warnings that come up