Programmatic SEO planning and audit — building or evaluating large sets of template-generated pages that target long-tail query patterns at scale (e.g. "[service] in [city]", "[product] vs [product]", "[tool] for [use-case]"). Covers data-source and template design, the thin/duplicate-content and doorway- page risks that get programmatic pages deindexed, uniqueness and value thresholds per page, internal linking and hub structure, indexation management (which pages to publish vs. noindex), and scaling without a quality manual action. Use this skill whenever the user wants to generate many pages from a template/dataset, do programmatic SEO, build location/comparison/use-case pages at scale, or asks why their generated pages aren't indexing. Trigger on: "programmatic SEO", "pSEO", "generate pages at scale", "templated pages", "location pages at scale", "comparison pages", "[city] pages", "my generated pages aren't indexed", "doorway pages", "scale content". For one-off content use /content-writer; for keyword discovery use /keyword-research.