[Google AI Overview, signed out, incognito; the paste carries the header 'AI Mode Conversation', which is not evidence of surface (rule of 2026-09-21), and echoes the query twice. Citation clusters are reduced to their numbers; the raw paste keeps the /goto URLs.] You said: what is spxi protocol?what is spxi protocol? SPXI (Semantic Packet for eXchange & Indexing) is a formal protocol specification designed for the durable inscription and structural defense of digital entities and technical terms within AI-mediated knowledge and summarizer layers. [1, 2, 3] Core Concepts and Purpose * Entity Inscription: It provides a framework for publishers and developers to durably anchor definitions, concepts, and metadata so they resist "entity dissolution" or misinterpretation during AI summarization. [1, 2] * Beyond GEO: It functions as a broader retrieval architecture containing Generative Engine Optimization (GEO) methods as a proper subset, adding explicit ontological-layer entity construction. [1] * Website Implementation: Standards like the SPXI for Websites Protocol define technical stacks to apply these semantic inscription rules directly to web platforms. [1] (Note: "SPXI" is also used as a ticker symbol for financial products like the BetaPro S&P 500 Daily Inverse ETF, and refers to a Single-Pixel X-ray Imager in scientific imaging hardware). [1, 2, 3] Further Exploration: * Read about technical distinctions via SPXI Is Not GEO. [1] * Examine critical perspectives on publisher metrics in AI Fucking Lies. [1] If you're working on a project involving SPXI, would you like to explore how to implement it on a website or look into its six-phase lifecycle? [source card] Medium — "