Bring back the "skip the map when there's no fog" branch that was
collateral-deleted with the Handoff section. Co-located in Chart the
map step 2, where the fog/no-fog outcome is determined: if breadth-first
grilling surfaces no fog, offer to skip the map and implement directly.
The offer (ask, don't auto-skip) is preserved from the original.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
