One reason not to implement auto-complete: your players will never have to deal with auto-corrupt.
A handier feature to implement would be intelligent command history—i.e. if you’ve already written X, don’t go through all past commands, but only those starting with X.
You didn’t know those cakes exist?
But if you think of IF and fairy tales, can you avoid thinking of Alabaster? Which doesn’t seem to me to have a heavy-handed morality lesson involved.
It could start its own genre and then be summarily kicked out for failing that genre’s checklist,,,,
That isn’t quite true, from what I recall?
“I considered becoming a pirate or a thief, but they were always being killed by adventurers and it was always fine for adventurers to run around with this, that, and the other in their pockets, so I became an adventurer.”
--- the stranger, probably.
Instructions unclear, removed hands and put them in pockets.