The shared contract banned every structure beyond 1-3 paragraphs, so
longer replies read as unformatted blocks. It now asks for short
blank-line paragraphs (2-4 on longer replies), permits a plain "- "
list when a reply genuinely enumerates three or more parallel items,
and one bold key takeaway per reply. The Coach ground rule keeps
prose-first; a list is the exception, never the default shape.