Use when a turn produces a multi-item synthesis (>=5 discrete items that benefit from cross-comparison) — triage, audit, survey, bug-sweep, design-alternatives, research findings, scorecards — and pasting it as raw Markdown in chat would be lower-bandwidth than a glanceable dashboard. Also when the operator says "rich render", "dashboard", "make it a dashboard", or asks to defer a long synthesis out of chat. Produces a single self-contained dark HTML file saved to ~/rich-renders/.
