What problem does it solve? Planning or restructuring a website's information architecture is difficult: pages get buried, navigation becomes cluttered, URLs become inconsistent, and orphan pages hurt SEO. This Skill guides the design of page hierarchies, navigation systems, URL patterns, and internal linking so sites are intuitive for users and optimized for search engines. ## Core Features & Use Cases - Page Hierarchy Design: Produces ASCII tree structures and Mermaid visual sitemaps with navigation zones, following the 3-click rule and flat-vs-deep tradeoffs. - Navigation & URL Planning: Defines header, footer, sidebar, and breadcrumb patterns plus consistent, human-readable URL conventions per page type. - Internal Linking Strategy: Builds hub-and-spoke content models, cross-section links, and orphan-page audit checklists. - Use Case: A SaaS company restructuring its marketing site can get a full deliverable set: an ASCII page tree, a Mermaid sitemap, a URL map table, a navigation spec, and an internal linking plan. ## Quick Start Plan the site architecture for my SaaS marketing website, including the page hierarchy, navigation structure, and URL map.