diff --git a/src/data/propers/common/assumption-collect.yml b/src/data/propers/common/assumption-collect.yml
index 7c4d2e1..d35ae6c 100644
--- a/src/data/propers/common/assumption-collect.yml
+++ b/src/data/propers/common/assumption-collect.yml
@@ -1,16 +1,28 @@
-# Verified against Divinum Officium (Monastic Tridentinum 1617) — read
-# directly from the reference engine's own real-date output (2025-08-15).
+# User decision (2026-08-21): switched from the pre-1950 collect
+# ("Famulórum tuórum...", what Monastic Tridentinum 1617 renders for the
+# feast itself and the closing octave day) to the post-1950-dogma
+# collect below ("Omnípotens sempitérne Deus, qui Immaculátam..."),
+# introduced in the 1954 Divino Afflatu revision after Pius XII defined
+# the Assumption dogma. Text read directly from the reference engine's
+# Sancti/08-15.txt [Oratio] (Latin) and English/Sancti/08-15.txt
+# [Oratio] (English) -- this is also what Monastic 1617 itself actually
+# renders for the *interior* octave days (Aug 16/18/19/21), just not
+# for the feast/closing day, an inconsistency in D.O.'s own data files
+# (see TODO.md/memory for the live-verify trace). vu now uses this
+# collect uniformly for the feast and the whole octave, matching the
+# majority (interior-day) reference-engine behavior rather than the
+# feast/closing-day one.
 id: assumption-collect
 text:
   la: |
     Orémus.
-    Famulórum tuórum, quǽsumus, Dómine, delíctis ignósce: ut qui tibi placére de áctibus nostris non valémus: Genitrícis Fílii tui Dómini nostri intercessióne salvémur:
-    Qui tecum vivit et regnat in unitáte Spíritus Sancti, Deus, per ómnia sǽcula sæculórum.
+    Omnípotens sempitérne Deus, qui Immaculátam Vírginem Maríam, Fílii tui Genetrícem, córpore et ánima ad cæléstem glóriam assumpsísti: concéde, quǽsumus; ut ad supérna semper inténti, ipsíus glóriæ mereámur esse consórtes.
+    Per eúmdem Dóminum nostrum Jesum Christum Fílium tuum, qui tecum vivit et regnat in unitáte Spíritus Sancti, Deus, per ómnia sǽcula sæculórum.
     ℟. Amen.
   en: |
     Let us pray.
-    O Lord, we beseech thee, forgive the transgressions of thy servants, and, forasmuch as by our own deeds we cannot please thee, may we find safety through the prayers of the Mother of thy Son and our Lord.
-    Who with thee liveth and reigneth, in the unity of the Holy Spirit, God, world without end.
+    Almighty everlasting God, who hast taken body and soul into heaven the Immaculate Virgin Mary, Mother of thy Son: grant, we beseech thee, that by steadfastly keeping heaven as our goal we may be counted worthy to join her in glory.
+    Through the same Jesus Christ, thy Son, Our Lord, Who liveth and reigneth with thee in the unity of the Holy Ghost, God, world without end.
     ℟. Amen.
 status:
   la: verified