- input_region: in the prompt-line shape the input box starts only at a column-0 prompt (codex indents a draft's continuation lines), and the prompt and the (whole-line) placeholder are stripped from the box's first non-blank line only, so `› Explain this terminal prompt:\n ›` is not empty. - test_r4 runs with S=40 again: the defective code nudged ~30 s after a missed transition, which S=10 could not tell from the fixed ~10 s. Both new checks fail against the defective versions (stall_watch.py at47e4274-> 30.24 s < 40; input_region.py atbf0f5c1-> nudge sent) and pass now, each with its passing twin. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>