ktistec now supports both @-mentions and #-hashtags.
commits 4118ec6 through 1bdcf12 consist of an embarrassing amount of yak-shaving, and that's not the whole of it. commits 3346865 through dfc00d2 were necessary to make those changes work. and most of the work to surmount the first problems i ran into were actually fixed with commit 258e2d3, but i didn't realize that and make the change until quite late in the game. so it goes.