Agent Skills: ring:visualizing

Generating self-contained, Lerian-branded HTML artifacts — D2 diagrams, comparison tables/matrices, code diffs, dashboards, slide decks, and plan/diff/recap reviews — from mandatory templates, then opening them in the browser. Use for architecture overviews, any table with 4+ rows or 3+ columns, slide presentations, or visual diff/plan/review output. Skip for simple tables that fit the terminal or text-only answers.