Shell Pilot 1.23.1

September 22, 2026 · Bug-fix release

Fixed the window layout breaking when a shell exits.

Symptom

In 1.23.0, once a session’s shell crashed, was killed or exited with an error, the window’s content grew taller than the window and was centred in it:

• the New Session button and the Sessions header slid under the traffic lights;
• the terminal’s first line went under the window title;
• Settings and part of the Activity footer fell off the bottom;
• the new Restart Shell / Close Session banner was pushed off-screen, so it never appeared.

The longer the exit message, the bigger the shift. A clean exit was not affected, because it closes the session.

Cause

The banner’s text was allowed to grow vertically to whatever height it needed at the width it was given. SwiftUI measures a window’s minimum size at almost no width, where that text wraps one letter per line, so the banner’s minimum height exceeded the window. Because the banner was a sibling of the terminal rather than an overlay on it, that minimum became the window content’s.

Fix

The banner is now an overlay on the terminal, which is sized by the terminal and cannot change the window’s layout, and its two lines of text are capped at two lines each, so its minimum height is bounded.

Verification

A signed Release build was launched and a session’s shell killed with SIGKILL. The sidebar, toolbar and terminal stayed in place, the row showed “Exited”, and the banner read “The shell was stopped by signal 9 (Killed: 9).” at the bottom of the terminal. Restart Shell started a new prompt under the old output.

Tests

401 tests pass across 30 suites.