EA-MPAI-SEMANTIC-PROLETARIAT-01 is the metadata packet that fixes the Semantic Proletariat as a class relation rather than a demographic: the class position of semantic laborers whose capacity to produce meaning and meaning-making technique operates through semantic means of production or circulation they do not govern. The packet recovers the concept from its founding analysis (Semantic Alienation and the Formation of Class Consciousness, #39), carries its registration in the framework's provenance anchor (#213), and develops it through the technique-reclamation line (#148): the object of semantic class struggle is technique — the procedures of generation, mutation, stabilization, and transmission — with three ownership domains (operators, training substrates, semantic time) and a second circulation layer (archives, corpora, identifiers, indexes, retrieval and composition platforms). It incorporates the August correction (Position Is Not Class, #1465, carried as DRAFT — NOT RATIFIED): class position is distinct from class function, the mediator is not a class, and neither humans nor AI systems form a single semantic class — a machine instance can labor, mediate, and perform a rentier function in the same event. The packet states a formal class-position test (P_s = L_s ∧ ¬G_s), the disambiguation and negative-edge tables against creator-class and compensation-only reductions, an inverted fan from Marxian, digital-labor, and general-intellect vocabularies, a preregistered search battery with ten failure flags, and a self-location clause placing the issuing archive in the bourgeois position its own model assigns — the political question being the governance of that ownership, not its denial. The R2 addendum registers the material demonstration: the seated source corpora and reading library as means of circulation held under producer governance, and the composition coordinates of #1543 as the instrument that makes the capture chain — procedural extraction into fixed semantic capital — empirically measurable.