Clean

Discards all uncommitted changes by reloading the current commit's files into the working directory.

tw clean

Twigg first shows what would be discarded and asks for confirmation:

changes in working directory:
example.txt: modified
new.txt: created
this will discard the changes above. Continue? [y/N]

Answer y to continue. Anything else aborts with clean aborted.

On success:

workdir cleaned

If there's nothing to discard, you'll see workdir is already clean.

Skipping the confirmation

Pass --force (short form: -f) to discard the changes without asking:

tw clean --force

Keep in mind that clean only affects the working directory. Commits are never touched, so anything you've already committed or amended stays safe.