Here's a widget I wrote on 5/8/25 to display helpful developer messages during the development phase:

Obviously, this widget relies upon a story variable, $releaseVersionOfGame, because it checks this boolean. Ideally, this boolean would be set in passage StoryInit in your Sugarcube game.

Then, whenever you want to show a message in a passage (for instance, to reassure yourself that $inventory has the contents you think it has), you do something like this:

dev.tw
        passworded access to Developer Notes
dorn_head_foot.tw
        contains header and footer passage 
          for use with hbar and bbar tags\
dorn_intro.tw
        contains passages comprising the Intro to the game/story
dorn_2.tw
        contains ?# passages that form the beginning of this hyperfic
dorn_last.tw
        contains scripts and special passages
        contains code for the playtime macro
        contains code for the fade-in macro
        contains code for hashing to enable passwording
        contains code to implement [nosave] tag for passages
        contains Config data:
          maxSlotSaves = 3
          maxStates = 50
          saves.isAllowed conditions
        contains code to check for [noreturn] tag, for menuing
        contains code to add visits to passage(s) programmatically 
               during initialization (for testing)
        contains code in PassageReady to track total number of passage visits