Prime: real content (psalms, Martyrology, Regula) and ordo corrections

Pulls in verified content from Divinum Officium rather than placeholders:
17 psalms (2, 6, 7-19, 118, 129), 365 days of the Martyrology, and the full
121-reading Regula cycle, plus the Athanasian Creed.

Ordo corrections driven by review against the real engine output:
- Capitulum and Preces now pick a Sunday/feast vs. ferial form
  (calendar/isSundayOrFeast); ferial Preces said every ferial day by choice.
- Chapter responsory, hymn doxology, and the opening versicle's
  Alleluia/Laus tibi all vary by season via a shared resolver
  (hours/seasonal-propers.ts).
- Real Roman Kalends/Nones/Ides Latin dating (calendar/roman-date.ts,
  verified against 363/365 real Martyrology headings) plus the historical
  "bis sextus" Feb 29 handling, and the Martyrology's Luna (moon-day)
  heading (a ported Golden-Number calculation).
- Fixed responsory structure (was missing its initial full repeat),
  weekday psalm antiphons (opening as incipit-or-full by rank, full
  repeat after the psalms/Creed as its own part, "*" chant mark kept),
  scripture citations on the capitulum/lectio brevis, and V./R. markers
  switched from Unicode symbols to plain text for reliable font rendering.
- Dropped Pretiosa and the dead-commemoration psalm (129) for time;
  trimmed section headings down to the ones that are actually named
  things (Preces, Chapter Office, etc. no longer relabel connective text).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

src/psalter/distribution.ts

@@ -2,11 +2,18 @@ import type { HourId } from '../hours/types';
 import type { Weekday } from '../calendar/types';
 import distributionData from '../data/psalter-distribution.yml';
 
-type DistributionTable = Partial<Record<HourId, Partial<Record<Weekday, number[]>>>>;
+/** A whole psalm, or (per data/psalter-distribution.yml's "N(a-b)" notation)
+ * a verse-range slice of one — the Monastic distribution splits several
+ * psalms (9, 17, 118) across adjacent days/hours. */
+export interface PsalmRef {
+  number: number;
+  verses?: string;
+}
+
+type DistributionTable = Partial<Record<HourId, Partial<Record<Weekday, PsalmRef[]>>>>;
 
 const distribution = distributionData as DistributionTable;
 
-/** Placeholder distribution — see data/psalter-distribution.yml for caveats. */
-export function getPsalmNumbersFor(hourId: HourId, weekday: Weekday): number[] {
+export function getPsalmsFor(hourId: HourId, weekday: Weekday): PsalmRef[] {
   return distribution[hourId]?.[weekday] ?? [];
 }

src/psalter/index.ts

@@ -11,12 +11,36 @@ for (const mod of Object.values(modules)) {
   psalms.set(mod.default.number, mod.default);
 }
 
+/**
+ * Content-authoring the full psalter (verified Latin+English for every
+ * psalm) is a separate, ongoing task — an unauthored psalm resolves as a
+ * single pending "verse" rather than throwing, so an ordo can still render
+ * around it.
+ */
 export function getPsalm(number: number): Psalm {
-  const psalm = psalms.get(number);
-  if (!psalm) {
-    throw new Error(`no data for psalm ${number}`);
+  return (
+    psalms.get(number) ?? {
+      number,
+      verses: [{ n: 1, text: {}, status: { la: 'missing', en: 'missing' } }],
+    }
+  );
+}
+
+/**
+ * @param verseRange e.g. "2-19" — Vulgate verse numbers, inclusive. Whole
+ * psalm (Monday's Ps 1/2/6, say) when omitted; a slice of a longer psalm
+ * (the Monastic Prime distribution splits Pss 9, 17, and 118 across days)
+ * when given.
+ */
+export function getPsalmVerses(number: number, verseRange?: string): Psalm['verses'] {
+  const psalm = getPsalm(number);
+  if (!verseRange) {
+    return psalm.verses;
   }
-  return psalm;
+  const [startStr, endStr] = verseRange.split('-');
+  const start = Number(startStr);
+  const end = endStr ? Number(endStr) : start;
+  return psalm.verses.filter((v) => v.n >= start && v.n <= end);
 }
 
 export type { Psalm, PsalmVerse, LanguageCode, TranslationStatus } from './types';