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matins.ts's three-nocturn gate correctly governed nocturn count (Sunday, or Duplex+) but wrongly reused the literal Sunday psalmody as content for every three-nocturn day, including a weekday feast. Live- verified (Monastic Tridentinum 1617) that a Duplex+ weekday feast has its own genuinely different psalmody -- confirmed per-Common-category, not per-saint, by cross-checking St. Lawrence against St. Ignatius of Antioch (a different Martyr sub-category, nearly identical psalm numbers, different antiphons). New mechanism (matins-psalmody-overrides.ts, mirroring the Lauds one but keyed per-category) with St. Lawrence authored as the live-verified proof; falls back to the plain ferial weekday table, redistributed into 3 nocturns, for every other Duplex+ id until its own category's content is authored. Also generalizes the canticle shape to support a citation spanning multiple scripture chapters under one heading (Lawrence's own Nocturn 3), and adds the new Sirach/Jeremiah chapters his canticles cite.