diff --git a/src/hours/none.ts b/src/hours/none.ts
index 2307f8f..8fc3475 100644
--- a/src/hours/none.ts
+++ b/src/hours/none.ts
@@ -13,6 +13,7 @@ import {
   resolveOfficeWinner,
   resolveMinorHourAntiphon,
   resolveMinorHourChapter,
+  resolveSelfContainedHymn,
 } from './resolve-common';
 import noneDefinitionData from '../data/hours/none.yml';
 import antiphonsData from '../data/hours/none-antiphons.yml';
@@ -25,8 +26,7 @@ function resolvePart(part: HourPart, day: LiturgicalDay): ResolvedPart[] {
     case 'opening-versicle':
       return [{ kind: 'versicle', text: resolveCommon(getOpeningVersicleId(day.season, day.winner)) }];
     case 'hymn':
-      // Self-contained, no appendDoxology — see none-hymn.yml.
-      return [{ kind: 'hymn', text: resolveCommon(part.textRef.id) }];
+      return resolveSelfContainedHymn(part);
     case 'chapter':
       return [{ kind: 'chapter', text: resolveMinorHourChapter('none', day, part.textRef.id) }];
     case 'day-collect':
diff --git a/src/hours/resolve-common.ts b/src/hours/resolve-common.ts
index f42fb3d..89541b3 100644
--- a/src/hours/resolve-common.ts
+++ b/src/hours/resolve-common.ts
@@ -1,4 +1,4 @@
-import type { ResolvedPart, ResolvedText } from './types';
+import type { PropersRef, ResolvedPart, ResolvedText } from './types';
 import type { Commemoration, DayWinner, LiturgicalDay, Weekday } from '../calendar/types';
 import type { ProperText } from '../propers';
 import { getCommonProper, getTemporalProper } from '../propers';
@@ -31,6 +31,15 @@ export function resolveCommon(id: string): ResolvedText {
   return toResolvedText(getCommonProper(id));
 }
 
+/** Terce/Sext/None's own Matins-less hymn 'hymn' case — a plain, fixed,
+ * self-contained text with no doxology mechanism at all (the closing
+ * doxology is baked directly into each hour's own hymn text file; see
+ * {terce,sext,none}-hymn.yml) and no override/season tiering. Byte-
+ * identical across all three files before being centralized here. */
+export function resolveSelfContainedHymn(part: { textRef: PropersRef }): ResolvedPart[] {
+  return [{ kind: 'hymn', text: resolveCommon(part.textRef.id) }];
+}
+
 // Named temporal winners with real standing of their own, unconditionally
 // override-eligible — see hours/lauds.ts's getPsalmodyOverrideFor, which
 // shares this set (imported from here, not duplicated) since it's the
diff --git a/src/hours/sext.ts b/src/hours/sext.ts
index 24eba44..fa6555e 100644
--- a/src/hours/sext.ts
+++ b/src/hours/sext.ts
@@ -13,6 +13,7 @@ import {
   resolveOfficeWinner,
   resolveMinorHourAntiphon,
   resolveMinorHourChapter,
+  resolveSelfContainedHymn,
 } from './resolve-common';
 import sextDefinitionData from '../data/hours/sext.yml';
 import antiphonsData from '../data/hours/sext-antiphons.yml';
@@ -25,8 +26,7 @@ function resolvePart(part: HourPart, day: LiturgicalDay): ResolvedPart[] {
     case 'opening-versicle':
       return [{ kind: 'versicle', text: resolveCommon(getOpeningVersicleId(day.season, day.winner)) }];
     case 'hymn':
-      // Self-contained, no appendDoxology — see sext-hymn.yml.
-      return [{ kind: 'hymn', text: resolveCommon(part.textRef.id) }];
+      return resolveSelfContainedHymn(part);
     case 'chapter':
       return [{ kind: 'chapter', text: resolveMinorHourChapter('sext', day, part.textRef.id) }];
     case 'day-collect':
diff --git a/src/hours/terce.ts b/src/hours/terce.ts
index 121a57e..9466398 100644
--- a/src/hours/terce.ts
+++ b/src/hours/terce.ts
@@ -13,6 +13,7 @@ import {
   resolveOfficeWinner,
   resolveMinorHourAntiphon,
   resolveMinorHourChapter,
+  resolveSelfContainedHymn,
 } from './resolve-common';
 import terceDefinitionData from '../data/hours/terce.yml';
 import antiphonsData from '../data/hours/terce-antiphons.yml';
@@ -25,8 +26,7 @@ function resolvePart(part: HourPart, day: LiturgicalDay): ResolvedPart[] {
     case 'opening-versicle':
       return [{ kind: 'versicle', text: resolveCommon(getOpeningVersicleId(day.season, day.winner)) }];
     case 'hymn':
-      // Self-contained, no appendDoxology — see terce-hymn.yml.
-      return [{ kind: 'hymn', text: resolveCommon(part.textRef.id) }];
+      return resolveSelfContainedHymn(part);
     case 'chapter':
       return [{ kind: 'chapter', text: resolveMinorHourChapter('terce', day, part.textRef.id) }];
     case 'day-collect':