More than two years ago I wrote arbtt, a tool that silently records what programs you are using and allows you to do statistics on that data later, based on rules that you define afterwards, hence the name automatic rule based time tracker. I wasn’t doing much with it recently (the last release has been half a year ago), but it nevertheless was running on my machine and by now has tracked a total time span of 248 days in 350000 records. Yesterday, I had a use for it again: measuring the time s
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