List every diagram template (16) and the featured cover with their slot schemas. Call this first to learn what shapes exist and exactly which slots each render tool expects.

Return nyyon's reasoning prompt for turning an article into a SET of figures + a cover: which template fits which idea, anchoring each to a sentence, and varying shapes. Pass the article (title/excerpt/body_text) to get the full ready-to-use prompt with the article embedded; omit it to get just the rules + template menu. Use the prompt to produce the figure-spec JSON, then call render_figure / render_cover.

Return the active brand theme — colors (incl. the accent), fonts, canvas sizes, and the env vars that override them.

Render a single in-article diagram to a PNG. Provide the template name and its slots (see list_templates for each template's slot schema). Returns the file path. Renders at 2x for crisp output.

Render the 1200x630 featured/hero cover (OG ratio): the nyyon wordmark, kit shapes wired to an accent hub, and the headline with one word in the accent colour. Returns the file path.

Render a full article set in one call: an array of figures (each { template, slots }) plus an optional cover. Returns the list of written paths. Convenience over calling render_figure repeatedly.