Where Was I?

cost probably extremely trivial... but quite a bit heavier than just getting the string. If there is any evidence it is at all significantly expensive there should be an option not to retrieve it.

before implementing any more sophisticated interactive graphics etc, there should be some sort of basic table or something which allows the basic information to be displayed / filtered / sorted.

Time going vertically.One column showing users stated 'current activity' over time. Next column showing the actual window that was in the foreground, scaled proportionally to how long the were open for.Possibly in future colour-coded according to tags.

Application should really aim to be lightweight and get its core task done. While it is running in the background, it should *never* disrupt the machine to the extent that it could cause audio dropouts, for example.Although the data itself is not particularly volumous, the views in particular have a lot of capacity to become very bloated. It would probably be a mistake to cache too much.On a very basic level, the GUI should probably be almost totally disposed when it is not active

option to graph just by unique name, or grouped by regex... tags?

User inputs some text to describe what their intended activity for that time is.There may be something to be said for the possibility of suggesting tasks from some other todo list application / website, or maybe incorporating more 'todo' functionality here... but this is probably in the domain of classic feature creep / bloat. A simple text description (maybe with #tags) should be ok for now.

to allow customisation of none-core features without polluting the scope of the basic application.

Probably well within the domain of bloat... but some daydreams:It might be nice for users to be able to associate their own images with certain tags etc. Could makie a nice visual representation of what work had been done... could be good reinforcement if artistic things are being done...For that matter, why not hook up with mutator and associate particular items with different synth parameters etc... at some point it might be nice to have some kind of architecture that would allow such things to happen without polluting the main app.

users may want to use the program to retrieve suggested tasks / report time spent etc.