Vertical is a story property: every frame of a thread is vertical or
horizontal together, a frame threaded onto a story takes its direction,
and frames split off by threading or breaking a thread keep theirs.
Type > Story Direction is type.storyDirection {vertical} (checked in the
menu) for the stories of the text selection or selected frames;
object.textFrameOptions {vertical} and frame.create {vertical} set the
frames' stories. Documents that stored Vertical on the frame open with
each story taking its first frame's direction. IDML StoryOrientation is
read into and written from the story, beside its column direction
(StoryDirection), which stays a separate setting.
Commands return errors instead of expect()/unreachable!() (book, library,
undo/redo, paste, find/replace, Pathfinder, tables, QR, select, swatches,
anchors, articles, transform again, XML import). The sample document builder
propagates errors. Commands that add a key to their parameters no longer
panic when a caller (control channel, MCP, script) passes an array or a
string, and corrupt crash-recovery metadata is ignored. engine, mcp and
tools now deny unwrap/expect/panic/unimplemented/todo/unreachable.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
aiongg