GSC Resolver Engine is a local-first decision library for decoding Google Search Console warnings without AI, crawling, login, or API access. It includes 178 governed resolver states across indexing, sitemaps, Core Web Vitals, HTTPS, rich results, manual actions, security, removals, and report-lag issues. Paste or select a GSC message and get a plain-English meaning, likely cause, fix path, validation step, stop condition, and client-ready report output.