Keep a short litany + Our Father at Compline on a Double, don't omit

compline-preces.yml was already the secular Tridentine 1906/1910 text
word-for-word (verified live against both tracks), so no text change
was needed there. The actual gap: both Monastic and secular tracks drop
Compline's Preces to nothing on a Double-or-higher, unlike Vespers/Lauds
which fall back to a short form. Per explicit request, this is now a
deliberate vu-specific deviation from both tracks: on a Double, Compline
substitutes the same short Kyrie/Pater-Noster litany Vespers already
falls back to on Sundays/feasts, instead of showing nothing.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AHXJAWVAabCKX1JgmDh4Rn

TODO.md

@@ -4074,3 +4074,25 @@ day) had to move to Oct 1 (her First Vespers) once tracing `resolveEveningDay` s
 doesn't keep her own Second Vespers (falls short of the `duplex-2-classis` floor) and Oct 3 (St.
 Therese, plain Duplex, below this override's own threshold) claims her evening instead. `npm
 test` (542 passed), `tsc --noEmit`, and `npm run build` all pass.
+
+### Compline Preces on a Double no longer vanish entirely — done (2026-08-28)
+
+User request: incorporate the secular track's Compline Preces, but always keep a short litany +
+Our Father said, even on a Double. Checked first rather than assuming a text change was needed:
+`compline-preces.yml`'s content is already word-for-word the secular Tridentine 1906/1910 text
+(the reference engine treats "1888/1906/1910" as one combined version label, same rubrics) — it
+was already the fuller, non-Monastic form, live-verified against both tracks. The real gap was
+structural: `compline.ts`'s `'preces'` case dropped the whole part to `[]` on a Double-or-higher
+(`omitOnDouble`), matching real practice in *both* Monastic and secular tracks (Compline's
+Preces are never substituted with anything shorter in the reference engine, secular or not —
+unlike Vespers/Lauds, which do fall back to a short litany).
+
+Per the user's explicit request, this is now a deliberate vu-specific deviation from both
+tracks: `compline.ts`'s `'preces'` case substitutes `lauds-short-litany` (the same short
+Kyrie/Pater-Noster litany Vespers' own `vespers-preces` case already falls back to on Sundays/
+feasts) instead of omitting, whenever `omitOnDouble` and `isDoubleOrHigher` both hold. `types.ts`'s
+`omitOnDouble` doc comment and `compline.yml`'s own header updated to describe the substitution
+rather than a drop. Regression test added (`tests/hours/compline.test.ts`, 2026-08-15, the
+Assumption, Duplex I. classis) confirming the short-form text (Kyrie/Pater/"Dómine, exáudi") is
+present and the fuller exchanges ("Benedíctus es, Dómine.../Miserére nostri...") are absent.
+`npm test` (543 passed), `tsc --noEmit`, and `npm run build` all pass.

src/data/hours/compline.yml

@@ -7,12 +7,19 @@
 #   - The "In manus tuas" short responsory, right after the capitulum.
 #   - The Nunc Dimittis, framed by its "Salva nos" antiphon, right after
 #     the responsory's versicle.
-#   - The fuller Tridentine Preces, in place of Monastic's own shorter form
-#     (which drops the "Benedíctus es, Dómine..." triple exchange and the
-#     "Miserére nostri, Dómine.../Fiat misericórdia..." exchange — both
+#   - The fuller Tridentine Preces (Tridentine 1906/1910 -- both share the
+#     same rubrics/calendar-era text per the reference engine's own combined
+#     "1888/1906/1910" version label), in place of Monastic's own shorter
+#     form (which drops the "Benedíctus es, Dómine..." triple exchange and
+#     the "Miserére nostri, Dómine.../Fiat misericórdia..." exchange — both
 #     marked "(sed rubrica ^Monastic omittitur)" in the source). Compline
 #     has no separate ferial/Sunday Preces text the way Prime does — one
-#     form, gated only by omitOnDouble (see calendar/isDoubleOrHigher).
+#     form, gated by omitOnDouble (see calendar/isDoubleOrHigher) -- but by
+#     deliberate choice (not drawn from either track, which both drop
+#     Compline's Preces to nothing on a Double) that gate substitutes the
+#     plain Kyrie/Pater-Noster short litany rather than omitting outright,
+#     so a short litany + Our Father is always said. See hours/compline.ts's
+#     'preces' case.
 #   - Lent's distinct hymn replacement ("Christe, qui lux es et dies") —
 #     see hours/compline.ts's 'hymn' case for a caveat on how confident to
 #     be that this actually triggers automatically in real practice.

src/hours/compline.ts

@@ -41,11 +41,18 @@ function resolvePart(part: HourPart, day: LiturgicalDay): ResolvedPart[] {
       return [{ kind: part.kind, text: resolveCommon(part.textRef.id) }];
     case 'responsory':
       return [{ kind: 'responsory', text: resolveResponsory(resolveCommon(part.textRef.id), day) }];
-    case 'preces':
-      if (part.omitOnDouble && isDoubleOrHigher(day.winner)) {
-        return [];
-      }
-      return [{ kind: 'preces', text: resolveCommon(part.textRef.id), label: part.label }];
+    case 'preces': {
+      // On a Double-or-higher, the full secular Preces (compline-preces —
+      // already the fuller Tridentine 1906/1910 text, see compline.yml's
+      // own header) steps aside for the plain Kyrie/Pater-Noster short
+      // litany (lauds-short-litany, already reused by Vespers' own
+      // 'vespers-preces' case the same way) rather than vanishing
+      // entirely — a deliberate choice to always keep a short litany +
+      // Our Father, even though real practice (both Monastic and
+      // secular) drops Compline's Preces to nothing on a Double.
+      const id = part.omitOnDouble && isDoubleOrHigher(day.winner) ? 'lauds-short-litany' : part.textRef.id;
+      return [{ kind: 'preces', text: resolveCommon(id), label: part.label }];
+    }
     case 'lesson':
       return [{ kind: 'lesson', text: resolveCommon(part.textRef.id), label: part.label }];
     case 'opening-versicle':

src/hours/types.ts

@@ -34,9 +34,15 @@ export type HourPart =
   // `label`, when given, is shown as a heading (e.g. "Preces", "Pretiosa") —
   // omitted for parts that are just connective tissue around a reading
   // (a blessing, a closing dialogue) that don't read as their own section.
-  // `omitOnDouble` drops the whole part on a Double-or-higher feast (real
-  // Preces are suppressed above a certain rank) — see calendar/
-  // isDoubleOrHigher for how far that's actually wired up today.
+  // `omitOnDouble` marks a part that's suppressed above a certain rank on
+  // real Double-or-higher feasts (see calendar/isDoubleOrHigher) — its own
+  // resolver decides what (if anything) replaces it. Compline's own
+  // 'preces' part is the only current user: it substitutes the short
+  // Kyrie/Pater litany (see hours/compline.ts's 'preces' case) rather than
+  // dropping to nothing, a deliberate vu-specific choice (real practice, in
+  // both Monastic and secular tracks, drops Compline's Preces to nothing
+  // on a Double, with no substitute) — the flag still means "not the full
+  // text here," just not "nothing here."
   | { kind: 'preces'; textRef: PropersRef; label?: string; omitOnDouble?: true }
   | { kind: 'psalm'; psalmNumber: number; verses?: string; antiphonRef?: PropersRef }
   | { kind: 'canticle'; canticleId: string; textRef: PropersRef; antiphonRef?: PropersRef }

tests/hours/compline.test.ts

@@ -77,6 +77,23 @@ describe('resolveOrdo("compline", ...)', () => {
     expect(preces && preces.kind === 'preces' ? preces.text.text.la : undefined).toContain('Miserére nostri');
   });
 
+  it('substitutes the short Kyrie/Pater litany for the fuller Preces on a Double-or-higher, rather than omitting it entirely', () => {
+    // 2026-08-15, the Assumption (Duplex I. classis), keeps her own
+    // evening outright. Real practice (both Monastic and secular tracks)
+    // drops Compline's Preces to nothing on a Double -- vu deliberately
+    // substitutes the plain short litany instead, so a short litany +
+    // Our Father is always said. See hours/compline.ts's 'preces' case
+    // and data/hours/compline.yml's own header.
+    const ordo = resolveOrdo('compline', '2026-08-15');
+    const preces = ordo.parts.find((p) => p.kind === 'preces' && p.text.text.la?.includes('Kýrie, eléison'));
+    expect(preces).toBeDefined();
+    const la = preces && preces.kind === 'preces' ? preces.text.text.la : undefined;
+    expect(la).toContain('Pater noster');
+    expect(la).toContain('Dómine, exáudi oratiónem meam');
+    expect(la).not.toContain('Benedíctus es, Dómine');
+    expect(la).not.toContain('Miserére nostri');
+  });
+
   it('closes with the Salve Regina (the per-annum default Marian antiphon), labeled by name', () => {
     const ordo = resolveOrdo('compline', MONDAY);
     const last = ordo.parts[ordo.parts.length - 1];