The resize fixture submitted the new pane's command before its shell produced initial output. Reuse the bounded boot precondition before the first sibling probe while preserving immediate post-resize measurements and strict geometry assertions. Cover delayed and silent startup with cleanup.
Keep resize assertions strict while preserving before/after observations, bounded prepaint traces, and Linux kernel PTY geometry after a failure. Cover diagnostic failures and cleanup; retain dependency caches when later conformance checks fail.
kuddev