Cheeky  Help: /forumthread

The "/forumthread" page:

Show all forum messages associated with a particular message thread. The result is basically the same as /forumpost except that none of the postings in the thread are selected.

Query parameters:

name=X
REQUIRED. The hash of any post of the thread.
t=a
Automatic display mode, i.e. hierarchical for desktop and chronological for mobile. This is the default if the "t" query parameter is omitted.
t=c
Show posts in the order they were written.
t=h
Show posts using hierarchical indenting.
unf
Show the original, unformatted source text.
hist
Show edit history in addition to current posts.