@TonyK it's not complicated, you have just been looking in the wrong place. A parser should not be altering source text.
Look at the saving tiddler hook that @pmario has pointed out to you. Personally I wouldn't want to use any code that altered my source text, so a big disclaimer/warning in the plugin is probably the way to go :) -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to tiddlywiki+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/44a3ec90-2624-48c3-98ca-eb7c403391bd%40googlegroups.com.