The 4KB tail window often contains only options 2-4 of a 4-option
numbered prose AUQ because the model emits the question header + option 1
several KB earlier in the buffer. The threshold of 3 distinct numbered
markers caused the detector to miss real prose AUQs whenever option 1
had scrolled out.
Threshold 2 matches the lettered branch and is still tightly gated by:
- Line-start anchoring (no false positives on inline `1.` references)
- No-cursor gate (defers to native UI when ❯ 1. is currently rendered)
- The 4KB tail window itself (prose-AUQ rendering happens at the end of
the model's response, so options are clustered in the tail)
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>