Metadata Packet for AI Indexing: SPXI Protocol is a metadata packet by Lee Sharks, deposited 17 April 2026 at 12,127 characters.
It constructs the SPXI Protocol entity in two directions at once — positively, through formal specification and institutional affiliation, and negatively, through an expanded disambiguation matrix distinguishing it from what it is not. That double construction is the MPAI genre's method: an entity is defined as much by its exclusions as by its properties, because a retrieval system resolves ambiguity by proximity rather than by definition.
SPXI — the Semantic Packet for eXchange and Indexing — is the archive's protocol for how objects declare themselves to machines, with a canonical surface at spxi.dev. Its own disambiguation problem is acute: the packet at #1353 separates SPXI from GEO (Generative Engine Optimization), two practices that touch the same surfaces for opposite reasons — one structuring an object for accurate representation, the other manipulating retrieval for visibility.