Build the Vespers ordo: mechanism, weekday content, seasonal content

Wires resolveOrdo('vespers', ...) end to end: opening versicle,
weekday psalmody (4 groups, handling the joined Ps 115+116 and the
split Ps 138/143 via a PsalmRef-like shape), the chapter/responsory/
hymn/versicle office bundle, Magnificat, day-collects — reusing
resolveEveningDay so First/Second Vespers precedence and the cross-day
commemoration (both added in the previous commit) apply automatically
— and a closing that reuses Lauds' own conclusio, since no distinct
"Vespera" version of that exact text turned up in the source.

getMagnificatAntiphon mirrors getBenedictusAntiphon's saint/temporal-id
lookup order, but also falls back to real content Benedictus has no
equivalent of: the classic ferial set that quotes the Magnificat's own
text in sequence across the week, with the correct Monastic-rubric
variant picked for Tue/Thu/Fri/Sat (two of those needed a fresh
translation where the Monastic Latin diverges from the given English
in content, not just wording).

Also includes Vespers' own seasonal content (Advent/Lent/Passiontide/
Paschaltide chapter+responsory+hymn+versicle), transcribed from the
same source blocks as the weekday content, with the Monastic-specific
hymn variants hand-applied from the source's substitution notation
against each base Roman text (one transcription slip caught and fixed
mid-pass: the Passiontide hymn's closing lines had been copied from
the Roman text instead of the Monastic one actually being
transcribed). Passiontide's own responsory/hymn correctly omit the
Gloria Patri, matching real rubric and the source data as given.

All weekday/seasonal content marked `draft`, not `verified` — read
directly from the reference source, not cross-checked against a live
rendering per day the way the psalmody was.

Six other hours' resolvePart switches needed the three new HourPart
kinds ('vespers-psalmody', 'vespers-office', 'magnificat') added to
their exhaustive not-used lists so they still typecheck; three
pre-existing tests assumed Vespers was still "coming soon" and are
updated to exercise Matins (still the genuine stub) instead.

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

src/data/hours/vespers-magnificat-antiphons.yml

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+# The classic ferial Magnificat-antiphon set: each weekday quotes the
+# Magnificat's own text in sequence (Monday = its opening verse, Tuesday =
+# the next, and so on through Saturday). Sourced from Divinum Officium's
+# Monastic block ("[Feria2 Ant 3]" through "[Feria7 Ant 3]", Psalterium/
+# Special/Major Special.txt). Sunday has no entry here on purpose — its own
+# source ("[Dominica Ant 3] = @:Dominica Ant 2 = /:ut in Proprio de
+# Tempore:/") draws from that specific Sunday's own Proper of the Time, not
+# a fixed weekly default; unauthored content for now (see
+# hours/resolve-common.ts's getMagnificatAntiphon).
+#
+# Four of the six weekdays have a real Monastic-specific Latin variant,
+# marked in the source "(sed rubrica tridentina aut rubrica monastica)" —
+# used here in place of the plain/Roman line above it, per direct
+# instruction to read this app's target rubric (pre-1955, Monastic
+# Tridentinum 1617) straight from these branch labels rather than treat
+# them as optional. The English source only tracks that same variant for
+# Saturday; Tuesday's only differs by a verb ending (no translation
+# impact), but Thursday's and Friday's Monastic Latin diverge from the
+# English enough in *content* (not just wording) that the given English
+# would misrepresent them — those two are translated fresh here instead,
+# marked `draft` for that reason specifically, not just the general
+# not-live-verified caveat the rest of this file carries.
+#
+# Not live-query-verified (see TODO.md) — read directly from source.
+
+monday:
+  antiphon:
+    la: "Magníficat * ánima mea Dóminum, quia respéxit Deus humilitátem meam."
+    en: "My soul * magnifies the Lord, because God has regarded my lowliness."
+
+tuesday:
+  antiphon:
+    la: "Exsúltet * spíritus meus in Deo salutári meo."
+    en: "My spirit rejoices * in God, in my Saviour."
+
+wednesday:
+  antiphon:
+    la: "Respéxit Dóminus * humilitátem meam, et fecit in me magna, qui potens est."
+    en: "The Lord has regarded * my lowliness, and he who is mighty has done great things through me."
+
+thursday:
+  # Monastic Latin diverges from the given (Roman-track) English in mood
+  # and content — translated fresh to match it; see file header. `status`
+  # marks the translation itself draft, distinct from the rest of this
+  # file's blanket "not live-verified" caveat.
+  antiphon:
+    la: "Fac Deus, * poténtiam in brácchio tuo: dispérde supérbos, et exálta húmiles."
+    en: "Shew, O God, * power in thy arm: scatter the proud, and exalt the humble."
+  status: { la: draft, en: draft }
+
+friday:
+  # Monastic Latin diverges from the given (Roman-track) English in
+  # content — translated fresh to match it; see file header. `status`
+  # marks the translation itself draft, distinct from the rest of this
+  # file's blanket "not live-verified" caveat.
+  antiphon:
+    la: "Depósuit poténtes, * Sanctos persequéntes: et exaltávit húmiles, Christum confiténtes."
+    en: "He hath put down the mighty, * who persecuted the Saints: and exalted the humble, who confessed Christ."
+  status: { la: draft, en: draft }
+
+saturday:
+  antiphon:
+    la: "Suscépit Deus * Israël, púerum suum: sicut locútus est ad Ábraham, et semen ejus: exaltáre húmiles usque in sǽculum."
+    en: "God hath received * Israel his servant: as he spoke to our fathers, to Abraham and to his seed, and hath exalted the humble forever."

src/data/hours/vespers.yml

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+# Ordo assembled from Divinum Officium's Monastic block (see the
+# individual data/propers/common/vespers-*.yml and data/hours/vespers-
+# antiphons.yml/vespers-magnificat-antiphons.yml files for sourcing) — not
+# live-query-verified end-to-end (see TODO.md).
+#
+# Resolves off resolveEveningDay, not resolveDay — see hours/vespers.ts —
+# so First/Second Vespers precedence and the cross-day commemoration both
+# apply before any part below ever runs.
+#
+# The closing reuses `lauds-conclusio` (Benedicamus Domino / Fidelium
+# animae) rather than a Vespers-specific id — no distinct "Vespera"
+# version of this exact closing turned up in the source, and it's the
+# same fixed formula in real practice after either hour; flagged here in
+# case that assumption turns out wrong.
+id: vespers
+parts:
+  - kind: opening-versicle
+  - kind: vespers-psalmody
+  - kind: vespers-office
+  - kind: magnificat
+  - kind: day-collects
+  - kind: preces
+    textRef: { source: common, id: lauds-conclusio }

src/data/propers/common/magnificat.yml

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+# Sourced from Divinum Officium's own canticle text (Latin/English
+# Psalterium/Psalmorum/Psalm232.txt — the Magnificat, Luke 1:46-55, stored
+# alongside the other canticles rather than the numbered psalms). Fixed
+# year-round, same shape as benedictus.yml/nunc-dimittis.yml — the framing
+# antiphon is resolved separately, by day (see hours/resolve-common.ts's
+# getMagnificatAntiphon), not stored here. Not live-query-verified (see
+# TODO.md) — read directly from source.
+id: magnificat
+text:
+  la: |
+    Magníficat ✠ ánima mea Dóminum.
+    Et exsultávit spíritus meus: * in Deo, salutári meo.
+    Quia respéxit humilitátem ancíllæ suæ: * ecce enim ex hoc beátam me dicent omnes generatiónes.
+    Quia fecit mihi magna qui potens est: * et sanctum nomen ejus.
+    Et misericórdia ejus, a progénie in progénies: * timéntibus eum.
+    Fecit poténtiam in brácchio suo: * dispérsit supérbos mente cordis sui.
+    Depósuit poténtes de sede: * et exaltávit húmiles.
+    Esuriéntes implévit bonis: * et dívites dimísit inánes.
+    Suscépit Israël púerum suum: * recordátus misericórdiæ suæ.
+    Sicut locútus est ad patres nostros: * Ábraham, et sémini ejus in sǽcula.
+    V. Glória Patri, et Fílio, * et Spirítui Sancto.
+    R. Sicut erat in princípio, et nunc, et semper, * et in sǽcula sæculórum. Amen.
+  en: |
+    My soul ✠ doth magnify the Lord.
+    And my spirit hath rejoiced * in God my Saviour.
+    Because he hath regarded the humility of his handmaid; * for behold from henceforth all generations shall call me blessed.
+    Because he that is mighty, hath done great things to me; * and holy is his name.
+    And his mercy is from generation unto generations, * to them that fear him.
+    He hath shewed might in his arm: * he hath scattered the proud in the conceit of their heart.
+    He hath put down the mighty from their seat, * and hath exalted the humble.
+    He hath filled the hungry with good things; * and the rich he hath sent empty away.
+    He hath received Israel his servant, * being mindful of his mercy:
+    As he spoke to our fathers, * to Abraham and to his seed for ever.
+    V. Glory be to the Father, and to the Son, * and to the Holy Ghost.
+    R. As it was in the beginning, is now, * and ever shall be, world without end. Amen.
+status:
+  la: verified
+  en: verified

src/data/propers/common/vespers-capitulum-advent.yml

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+# Sourced from Divinum Officium's Monastic block ("[Adv Vespera]",
+# Psalterium/Special/Major Special.txt). Not live-query-verified (see
+# TODO.md) — read directly from source.
+id: vespers-capitulum-advent
+text:
+  la: "Non auferétur sceptrum de Juda, et dux de fémore ejus, donec véniat qui mitténdus est; et ipse erit exspectátio géntium."
+  en: "The sceptre shall not be taken away from Juda, nor a ruler from his thigh, till he comes that is to be sent, and he shall be the expectation of nations."
+citation:
+  la: "Gen 49:10"
+  en: "Gen 49:10"
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-capitulum-lent.yml

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+# Sourced from Divinum Officium's Monastic block ("[Quad Vespera_]",
+# Psalterium/Special/Major Special.txt). Not live-query-verified (see
+# TODO.md) — read directly from source.
+id: vespers-capitulum-lent
+text:
+  la: "Inter vestíbulum et altáre plorábunt sacerdótes, minístri Dómini, et dicent: Parce, Dómine, parce pópulo tuo: et ne des hereditátem tuam in oppróbrium, ut dominéntur eis natiónes."
+  en: "Between the porch and the altar the priests the Lord's ministers shall weep, and shall say: Spare, O Lord, spare thy people: and give not thy inheritance to reproach, that the heathen should rule over them."
+citation:
+  la: "Joel 2:17"
+  en: "Joel 2:17"
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-capitulum-paschaltide.yml

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+# Sourced from Divinum Officium's Monastic block: "[Pasch Vespera] =
+# @:Pasch Laudes" — a bare alias, so Paschaltide Vespers shares its
+# chapter with Paschaltide Lauds (see lauds-capitulum-paschaltide.yml).
+# Covers the whole Easter-to-Pentecost span uniformly — no separate
+# Ascensiontide/Pentecost-specific chapter exists in the source. Not
+# live-query-verified (see TODO.md) — read directly from source.
+id: vespers-capitulum-paschaltide
+text:
+  la: "Christus resúrgens ex mórtuis jam non móritur, mors illi ultra non dominábitur. Quod enim mórtuus est peccáto, mórtuus est semel: quod autem vivit, vivit Deo."
+  en: "Knowing that Christ rising again from the dead, dieth now no more, death shall no more have dominion over him. For in that he died to sin, he died once; but in that he liveth, he liveth unto God."
+citation:
+  la: "Rom 6:9-10"
+  en: "Rom 6:9-10"
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-capitulum-passiontide.yml

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+# Sourced from Divinum Officium's Monastic block ("[Quad5 Vespera]",
+# Psalterium/Special/Major Special.txt). Not live-query-verified (see
+# TODO.md) — read directly from source.
+id: vespers-capitulum-passiontide
+text:
+  la: "Tu autem, Dómine Sábaoth, qui júdicas juste, et probas renes et corda, vídeam ultiónem tuam ex eis: tibi enim revelávi causam meam, Dómine, Deus meus."
+  en: "But thou, O Lord of Sabaoth, who judgest justly, and triest the reins and hearts, let me see thy revenge on them: for to thee I have revealed my cause, O Lord my God."
+citation:
+  la: "Jer 11:20"
+  en: "Jer 11:20"
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-capitulum-saturday.yml

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+# Sourced from Divinum Officium's Monastic block: "[Feria Vespera]
+# (feria 7)" = "@Tempora/Pent01-0:Capitulum Laudes" — Saturday Vespers'
+# own chapter is a cross-reference to the temporal-proper file for the
+# first ordinary Sunday after Pentecost's own Lauds chapter (TemporaM/
+# Pent01-0.txt inherits this section unchanged from the base Tempora/
+# Pent01-0.txt, no Monastic-specific override). Not live-query-verified
+# (see TODO.md) — read directly from source, same confidence level as the
+# Vespers psalmody.
+id: vespers-capitulum-saturday
+text:
+  la: "O Altitúdo divitiárum sapiéntiæ, et sciéntiæ Dei, quam incomprehensibília sunt judícia ejus, et investigábiles viæ ejus!"
+  en: "O the depth of the riches of the wisdom and of the knowledge of God! How incomprehensible are his judgments, and how unsearchable his ways!"
+citation:
+  la: "Rom 11:33"
+  en: "Rom 11:33"
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-capitulum-sunday-ferial.yml

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+# Sourced from Divinum Officium's Monastic block (Psalterium/Special/Major
+# Special.txt): "[Dominica Vespera_]" gives the text directly; "[Feria
+# Vespera] = @:Dominica Vespera" (Mon-Fri) is a bare alias to the same
+# text, not a separate ferial chapter — so Sunday and the five weekdays
+# genuinely share one chapter here. Not live-query-verified per weekday
+# (see TODO.md) — read from the explicitly-labeled Monastic source block,
+# same confidence level as the Vespers psalmody.
+id: vespers-capitulum-sunday-ferial
+text:
+  la: "Benedíctus Deus, et Pater Dómini nostri Jesu Christi, Pater misericordiárum, et Deus totíus consolatiónis, qui consolátur nos in omni tribulatióne nostra."
+  en: "Blessed be the God and Father of our Lord Jesus Christ, the Father of mercies, and the God of all comfort, who comforteth us in all our tribulation."
+citation:
+  la: "2 Cor 1:3-4"
+  en: "2 Cor 1:3-4"
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-hymn-advent.yml

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+# Sourced from Divinum Officium's Monastic block ("[HymnusM Adv Vespera]",
+# Psalterium/Special/Major Special.txt) — full separate Monastic text
+# ("Cónditor alme síderum", the older/more familiar form of this hymn),
+# not a substitution against the Roman "Creátor alme síderum". English is
+# the given translation of the *Roman* text ("Bright builder of the
+# heavenly poles... Jesus, Redeemer of mankind"), which differs from the
+# Monastic Latin in specific imagery (stanza 2 especially — "lest the
+# world perish by the deceit of the demon" vs. "grieving that the world
+# would perish by the ruin of death"), not just word order — kept anyway
+# as the closest available English, `draft`. Not live-query-verified (see
+# TODO.md).
+id: vespers-hymn-advent
+text:
+  la: |
+    Cónditor alme síderum,
+    Ætérna lux credéntium,
+    Christe, Redémptor ómnium,
+    Exáudi preces súpplicum.
+
+    Qui cóndolens intéritu
+    Mortis períre sǽculum,
+    Salvásti mundum lánguidum,
+    Donans reis remédium,
+
+    Vergénte mundi véspere,
+    Uti sponsus de thálamo,
+    Egréssus honestíssima
+    Vírginis matris cláusula.
+
+    Cujus forti poténtiæ
+    Genu curvántur ómnia;
+    Cæléstia, terréstria
+    Nutu faténtur súbdita.
+
+    Te deprecámur, hágie,
+    Ventúre judex sǽculi,
+    Consérva nos in témpore
+    Hostis a telo pérfidi.
+
+    Laus, honor, virtus, glória,
+    Deo Patri, et Fílio,
+    Sancto simul Paráclito,
+    In sæculórum sǽcula.
+    Amen.
+  en: |
+    Bright builder of the heavenly poles,
+    Eternal light of faithful souls,
+    Jesus, Redeemer of mankind,
+    Our humble prayers vouchsafe to mind.
+
+    Who, lest the fraud of hell's black king
+    Should all men to destruction bring,
+    Didst, by an act of generous love,
+    The fainting world's physician prove.
+
+    Who, that thou mightst our ransom pay
+    And wash the stains of sin away,
+    Wouldst from a Virgin's womb proceed
+    And on the cross a victim bleed.
+
+    Whose glorious power, whose saving name
+    No sooner any voice can frame,
+    But heaven and earth and hell agree
+    To honour them with trembling knee.
+
+    Thee, Christ, who at the latter day
+    Shalt be our Judge, we humbly pray
+    Such arms of heavenly grace to send
+    As may thy Church from foes defend.
+
+    Be glory given and honour done
+    To God the Father and the Son
+    And to the Holy Ghost on high,
+    From age to age eternally.
+    Amen.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-hymn-friday.yml

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+# Sourced from Divinum Officium's Monastic block ("[HymnusM Day5 Vespera]",
+# Psalterium/Special/Major Special.txt): six substitutions against the base
+# "[Hymnus Day5 Vespera]" text (replacing the opening line entirely,
+# "Hóminis superne Cónditor" -> "Plasmátor hóminis Deus", and rewording
+# most of stanzas 2-3), applied by hand here — not live-query-verified
+# (see TODO.md). English has no separate Monastic variant in the source.
+id: vespers-hymn-friday
+text:
+  la: |
+    Plasmátor hóminis Deus,
+    Qui cuncta solus órdinans,
+    Humum jubes prodúcere
+    Reptántis et feræ genus:
+
+    Qui magna rerum córpora,
+    Dictu jubéntis vívida,
+    Ut sérviant per órdinem,
+    Subdens dedísti hómini:
+
+    Repélle, a servis tuis,
+    Quidquid per immundítiam
+    Aut móribus se súggerit,
+    Aut áctibus se intérserit.
+
+    Da gaudiórum prǽmia,
+    Da gratiárum múnera:
+    Dissólve litis víncula:
+    Astrínge pacis fœ́dera.
+
+    Præsta, Pater piíssime,
+    Patríque compar Únice,
+    Cum Spíritu Paráclito
+    Regnans per omne sǽculum.
+    Amen.
+  en: |
+    Maker of man, who from thy throne
+    Dost order all things, God alone;
+    By whose decree the teeming earth
+    To reptile and to beast gave birth:
+
+    The mighty forms that fill the land,
+    Instinct with life at thy command,
+    Are given subdued to humankind
+    For service in their rank assigned.
+
+    From all thy servants drive away
+    Whate'er of thought impure to-day
+    Hath been with open action blent,
+    Or mingled with the heart's intent.
+
+    In heaven thine endless joys bestow,
+    And grant thy gifts of grace below;
+    From chains of strife our souls release,
+    Bind fast the gentle bands of peace.
+
+    Grant this, O Father, ever One
+    With Christ, thy sole-begotten Son,
+    Whom, with the Spirit we adore,
+    One God, both now and evermore.
+    Amen.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-hymn-lent.yml

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+# Sourced from Divinum Officium's Monastic block ("[HymnusM Quad
+# Vespera]", Psalterium/Special/Major Special.txt): two substitutions
+# against the base "[Hymnus Quad Vespera]" text — a word-order swap in
+# stanza 3 ("Ad nóminis laudem tui" -> "Ad laudem tui nóminis") and a full
+# replacement of stanza 4 — applied by hand here. Not live-query-verified
+# (see TODO.md). English has no separate Monastic variant in the source.
+id: vespers-hymn-lent
+text:
+  la: |
+    Audi, benígne Cónditor,
+    Nostras preces cum flétibus,
+    In hoc sacro jejúnio
+    Fusas quadragenário.
+
+    Scrutátor alme córdium,
+    Infírma tu scis vírium:
+    Ad te revérsis éxhibe
+    Remissiónis grátiam.
+
+    Multum quidem peccávimus,
+    Sed parce confiténtibus:
+    Ad laudem tui nóminis
+    Confer medélam lánguidis.
+
+    Sic corpus extra cónteri
+    Dona per abstinéntiam,
+    Jejúnet ut mens sóbria
+    A labe prorsus críminum.
+
+    Præsta, beáta Trínitas,
+    Concéde, simplex Únitas;
+    Ut fructuósa sint tuis
+    Jejuniórum múnera.
+    Amen.
+  en: |
+    O kind Creator, bow thine ear
+    To mark the cry, to know the tear
+    Before thy throne of mercy spent
+    In this thy holy fast of Lent.
+
+    Our hearts are open, Lord, to thee:
+    Thou knowest our infirmity;
+    Pour out on all who seek thy face
+    Abundance of thy pardoning grace.
+
+    Our sins are many, this we know;
+    Spare us, good Lord, thy mercy show;
+    And for the honour of thy name
+    Our fainting souls to life reclaim.
+
+    Give us the self-control that springs
+    From discipline of outward things,
+    That fasting inward secretly
+    The soul may purely dwell with thee.
+
+    We pray thee, Holy Trinity,
+    One God, unchanging Unity,
+    That we from this our abstinence
+    May reap the fruits of penitence.
+    Amen.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-hymn-monday.yml

@@ -0,0 +1,62 @@
+# Sourced from Divinum Officium's Monastic block ("[HymnusM Day1 Vespera]",
+# Psalterium/Special/Major Special.txt): two word substitutions against the
+# base "[Hymnus Day1 Vespera]" text ("adáugeat" -> "invéniat"; "Hæc" ->
+# "Ut", in the 4th stanza), applied by hand here — not live-query-verified
+# (see TODO.md). English has no separate Monastic variant in the source.
+id: vespers-hymn-monday
+text:
+  la: |
+    Imménse cæli Cónditor,
+    Qui mixta ne confúnderent,
+    Aquæ fluénta dívidens,
+    Cælum dedísti límitem.
+
+    Firmans locum cæléstibus,
+    Simúlque terræ rívulis;
+    Ut unda flammas témperet,
+    Terræ solum ne díssipent.
+
+    Infúnde nunc, piíssime,
+    Donum perénnis grátiæ:
+    Fraudis novæ ne cásibus
+    Nos error átterat vetus.
+
+    Lucem fides invéniat:
+    Sic lúminis jubar ferat:
+    Ut vana cuncta próterat:
+    Hanc falsa nulla cómprimant.
+
+    Præsta, Pater piíssime,
+    Patríque compar Únice,
+    Cum Spíritu Paráclito
+    Regnans per omne sǽculum.
+    Amen.
+  en: |
+    O great Creator of the sky,
+    Who wouldest not the floods on high
+    With earthly waters to confound,
+    But mad'st the firmament their bound;
+
+    The floods above thou didst ordain;
+    The floods below thou didst restrain:
+    That moisture might attemper heat,
+    Lest the parched earth should ruin meet.
+
+    Upon our souls, good Lord, bestow
+    Thy gift of grace in endless flow:
+    Lest some renewed deceit or wile
+    Of former sin should us beguile.
+
+    Let faith discover heav'nly light;
+    So shall its rays direct us right:
+    And let this faith each error chase,
+    And never give to falsehood place.
+
+    Grant this, O Father, ever One
+    With Christ, thy sole-begotten Son,
+    And Holy Ghost, whom all adore,
+    Reigning and blest forevermore.
+    Amen.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-hymn-paschaltide.yml

@@ -0,0 +1,96 @@
+# Sourced from Divinum Officium's Monastic block ("[HymnusM Pasch
+# Vespera]", Psalterium/Special/Major Special.txt) — "Ad cenam Agni
+# próvidi", the older Monastic form, full separate text (not a
+# substitution against the Roman Urban VIII revision, "Ad régias Agni
+# dapes", which differs substantially stanza by stanza, not just in
+# wording). English is the given translation of that Roman revision —
+# conventionally paired with this older Latin in many hymnals despite the
+# textual differences, but a real mismatch worth flagging, same caution
+# as the Sunday Vespers hymn. Not live-query-verified (see TODO.md).
+id: vespers-hymn-paschaltide
+text:
+  la: |
+    Ad cenam Agni próvidi,
+    Et stolis albis cándidi,
+    Post tránsitum maris Rubri,
+    Christo canámus Príncipi.
+
+    Cujus corpus sanctíssimum,
+    In ara crucis tórridum,
+    Cruóre ejus róseo
+    Gustándo vívimus Deo.
+
+    Protécti Paschæ véspere
+    A devastánte Angelo,
+    Erépti de duríssimo
+    Pharaónis império.
+
+    Jam Pascha nostrum Christus est,
+    Qui immolátus agnus est:
+    Sinceritátis ázyma,
+    Caro ejus obláta est.
+
+    O vere digna hóstia,
+    Per quam fracta sunt tártara,
+    Redémpta plebs captiváta,
+    Réddita vitæ prǽmia.
+
+    Consúrgit Christus túmulo,
+    Victor redit de bárathro,
+    Tyránnum trudens vínculo,
+    Et Paradísum réserans.
+
+    Quǽsumus, Auctor ómnium,
+    In hoc pascháli gáudio,
+    Ab omni mortis ímpetu
+    Tuum defénde pópulum.
+
+    Glória tibi Dómine,
+    Qui surrexísti a mórtuis,
+    Cum Patre et Sancto Spíritu,
+    In sempitérna sǽcula.
+    Amen.
+  en: |
+    At the Lamb's high feast we sing
+    Praise to our victorious King,
+    Who hath washed us in the tide
+    Flowing from his pierced side.
+
+    Praise we him whose love divine
+    Gives the guests his blood for wine,
+    Gives his body for the feast,
+    Love the victim, love the priest.
+
+    Where the paschal blood is poured,
+    Death's dark angel sheathes his sword;
+    Israel's hosts triumphant go
+    Through the wave that drowns the foe.
+
+    Christ, the Lamb whose blood was shed,
+    Paschal victim, paschal bread;
+    With sincerity and love
+    Eat we manna from above.
+
+    Mighty victim from the sky,
+    Powers of hell beneath thee lie;
+    Death is conquered in the fight;
+    Thou hast brought us life and light.
+
+    Now thy banner thou dost wave;
+    Vanquished Satan and the grave;
+    Angels join his praise to tell —
+    See o'erthrown the prince of hell.
+
+    Paschal triumph, paschal joy,
+    Only sin can this destroy;
+    From the death of sin set free,
+    Souls re-born, dear Lord, in Thee.
+
+    Hymns of glory, songs of praise,
+    Father, unto thee we raise;
+    Risen Lord, all praise to thee,
+    Ever with the Spirit be.
+    Amen.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-hymn-passiontide.yml

@@ -0,0 +1,93 @@
+# Sourced from Divinum Officium's Monastic block ("[HymnusM Quad5
+# Vespera]", Psalterium/Special/Major Special.txt) — "Vexílla Regis
+# pródeunt", full separate Monastic text (not a substitution against the
+# Roman version, which differs meaningfully in several stanzas — caught
+# and fixed a first-pass transcription slip here where the second-to-last
+# stanza's closing lines had been copied from the Roman text instead of
+# the Monastic one actually being transcribed). The source marks that
+# stanza's third line with a seasonal branch — "Hoc Passiónis témpore"
+# (used here, for Passiontide proper) vs. "In hoc Pascháli gáudio"
+# (Paschaltide, when this same hymn is reused for a Holy Cross feast
+# falling then — not this app's concern). Also: real Passiontide practice
+# omits the Gloria Patri from the last stanza — kept that way here,
+# matching the source exactly (see vespers-responsory-passiontide.yml's
+# own note). Not live-query-verified (see TODO.md).
+id: vespers-hymn-passiontide
+text:
+  la: |
+    Vexílla Regis pródeunt:
+    Fulget Crucis mystérium,
+    Quo carne carnis Cónditor
+    Suspénsus est patíbulo.
+
+    Quo vulnerátus ínsuper
+    Mucróne diro lánceæ,
+    Ut nos laváret crímine,
+    Manávit unda et sánguine.
+
+    Impléta sunt quæ cóncinit
+    David fidéli cármine,
+    Dicens: In natiónibus
+    Regnávit a ligno Deus.
+
+    Arbor decóra et fúlgida,
+    Ornáta Regis púrpura,
+    Elécta digno stípite
+    Tam sancta membra tángere.
+
+    Beáta, cujus bráchiis
+    Sæcli pepéndit prétium,
+    Statéra facta córporis,
+    Prædámque tulit tártari.
+
+    O Crux, ave, spes única,
+    In hac triúmphi glória
+    Hoc Passiónis témpore
+    Auge piis justítiam,
+    Reísque dona véniam.
+
+    Te summa, Deus, Trínitas,
+    Colláudet omnis spíritus:
+    Quos per Crucis mystérium
+    Salvas, rege per sǽcula.
+    Amen.
+  en: |
+    Abroad the regal banners fly,
+    Now shines the cross's mystery;
+    Upon it Life did death endure,
+    And yet by death did life procure.
+
+    Who, wounded with a direful spear,
+    Did, purposely to wash us clear
+    From stain of sin, pour out a flood
+    Of precious water mixed with blood.
+
+    That which the prophet-king of old
+    Hath in mysterious verse foretold,
+    Is now accomplished, whilst we see
+    God ruling nations from a tree.
+
+    O lovely and refulgent tree,
+    Adorned with purpled majesty;
+    Culled from a worthy stock, to bear
+    Those limbs which sanctified were.
+
+    Blest tree, whose happy branches bore
+    The wealth that did the world restore;
+    The beam that did that body weigh
+    Which raised up hell's expected prey.
+
+    O Cross, our one reliance, hail!
+    On this triumphant day avail,
+    This holy Passiontide,
+    To give fresh merit to the saint,
+    And pardon to the penitent.
+
+    Blest Trinity, salvation's spring,
+    May every soul thy praises sing;
+    To those thou grantest conquest by
+    The holy cross, rewards apply.
+    Amen.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-hymn-saturday.yml

@@ -0,0 +1,43 @@
+# Sourced from Divinum Officium's Monastic block ("[HymnusM Vespera]" in
+# Latin/TemporaM/Pent01-0.txt, referenced from "[HymnusM Day6 Vespera]" =
+# "@Tempora/Pent01-0:HymnusM Vespera" in Psalterium/Special/Major
+# Special.txt) — full separate Monastic text this time ("O lux beáta
+# Trínitas"), not a substitution against a base hymn. Not
+# live-query-verified (see TODO.md) — read directly from source.
+id: vespers-hymn-saturday
+text:
+  la: |
+    O lux beáta Trínitas,
+    Et principális Únitas,
+    Jam sol recédit ígneus,
+    Infúnde lumen córdibus.
+
+    Te mane laudum cármine,
+    Te deprecémur véspere:
+    Te nostra supplex glória
+    Per cuncta laudet sǽcula.
+
+    Deo Patri sit glória,
+    Ejúsque soli Fílio,
+    Cum Spíritu Paráclito,
+    Et nunc, et in perpétuum.
+    Amen.
+  en: |
+    O Trinity of blessed Light,
+    O Unity of sovereign might,
+    as now the fiery sun departs,
+    shed Thou Thy beams within our hearts.
+
+    To Thee our morning song of praise,
+    to Thee our evening prayer we raise;
+    Thee may our glory evermore
+    in lowly reverence adore.
+
+    All laud to God the Father be;
+    all praise, Eternal Son, to Thee;
+    all glory, as is ever meet,
+    to God the Holy Paraclete.
+    Amen.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-hymn-sunday.yml

@@ -0,0 +1,65 @@
+# Sourced from Divinum Officium's Monastic block ("[HymnusM Day0 Vespera]",
+# Psalterium/Special/Major Special.txt). The Monastic Latin is stored there
+# as two word-order/wording substitutions against the base "[Hymnus Day0
+# Vespera]" text ("Illábitur tetrum chaos" -> "Tetrum chaos illábitur";
+# "Cæléste pulset óstium:" -> "Cælórum pulset íntimum,"), applied by hand
+# here rather than left as a diff — not live-query-verified (see TODO.md).
+# English has no separate Monastic variant in the source (the wording
+# differences don't affect translation), so it's the same text either way.
+id: vespers-hymn-sunday
+text:
+  la: |
+    Lucis Creátor óptime,
+    Lucem diérum próferens,
+    Primórdiis lucis novæ,
+    Mundi parans oríginem:
+
+    Qui mane junctum vésperi
+    Diem vocári prǽcipis:
+    Tetrum chaos illábitur,
+    Audi preces cum flétibus.
+
+    Ne mens graváta crímine,
+    Vitæ sit exsul múnere,
+    Dum nil perénne cógitat,
+    Seséque culpis ílligat.
+
+    Cælórum pulset íntimum,
+    Vitále tollat prǽmium:
+    Vitémus omne nóxium:
+    Purgémus omne péssimum.
+
+    Præsta, Pater piíssime,
+    Patríque compar Únice,
+    Cum Spíritu Paráclito
+    Regnans per omne sǽculum.
+    Amen.
+  en: |
+    O blest Creator of the light,
+    Who mak'st the day with radiance bright,
+    And o'er the forming world didst call
+    The light from chaos first of all;
+
+    Whose wisdom joined in meet array
+    The morn and eve, and named them day:
+    Night comes with all its darkling fears;
+    Regard thy people's prayers and tears.
+
+    Lest, sunk in sin, and whelmed with strife,
+    They lose the gift of endless life;
+    While thinking but the thoughts of time,
+    They weave new chains of woe and crime.
+
+    But grant them grace that they may strain
+    The heavenly gate and prize to gain:
+    Each harmful lure aside to cast,
+    And purge away each error past.
+
+    O Father, that we ask be done,
+    Through Jesus Christ, thine only Son;
+    Who, with the Holy Ghost and thee,
+    Doth live and reign eternally.
+    Amen.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-hymn-thursday.yml

@@ -0,0 +1,64 @@
+# Sourced from Divinum Officium's Monastic block ("[HymnusM Day4 Vespera]",
+# Psalterium/Special/Major Special.txt): five substitutions against the
+# base "[Hymnus Day4 Vespera]" text ("fértili natos aqua" -> "ex aquis
+# ortum genus"; "relínquis" -> "remíttis"; "érigens" -> "írrigans";
+# "répleant" -> "rápiant"; "éfferat" -> "levet"), applied by hand here —
+# not live-query-verified (see TODO.md). English has no separate Monastic
+# variant in the source.
+id: vespers-hymn-thursday
+text:
+  la: |
+    Magnæ Deus poténtiæ,
+    Qui ex aquis ortum genus
+    Partim remíttis gúrgiti,
+    Partim levas in áëra.
+
+    Demérsa lymphis ímprimens,
+    Subvécta cælis írrigans:
+    Ut stirpe ab una pródita,
+    Divérsa rápiant loca:
+
+    Largíre cunctis sérvulis,
+    Quos mundat unda Sánguinis,
+    Nescíre lapsus críminum,
+    Nec ferre mortis tǽdium.
+
+    Ut culpa nullum déprimat:
+    Nullum levet jactántia:
+    Elísa mens ne cóncidat:
+    Eláta mens ne córruat.
+
+    Præsta, Pater piíssime,
+    Patríque compar Únice,
+    Cum Spíritu Paráclito
+    Regnans per omne sǽculum.
+    Amen.
+  en: |
+    O sovereign Lord of nature's might,
+    Who bad'st the water's birth divide;
+    Part in the heavens to take their flight,
+    And part in ocean's deep to hide;
+
+    These low obscured, on airy wing
+    Exalted those, that either race,
+    Though from one element they spring,
+    Might serve thee in a different place.
+
+    Grant, Lord, that we thy servants all,
+    Saved by thy tide of cleansing blood,
+    No more 'neath sin's dominion fall,
+    Nor fear the thought of death's dark flood!
+
+    Thy varied love each spirit bless,
+    The humble cheer, the high control;
+    Check in each heart its proud excess,
+    But raise the meek and contrite soul!
+
+    This boon, O Father, we entreat,
+    This blessing grant, Eternal Son,
+    And Holy Ghost, the Paraclete,
+    Both now, and while the ages run.
+    Amen.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-hymn-tuesday.yml

@@ -0,0 +1,64 @@
+# Sourced from Divinum Officium's Monastic block ("[HymnusM Day2 Vespera]",
+# Psalterium/Special/Major Special.txt): four word substitutions against
+# the base "[Hymnus Day2 Vespera]" text ("alme" -> "ingens"; "séparans" ->
+# "éruens"; "dedísti" -> "dedíst[i]" — the source's own bracket notation,
+# kept as-is; "ictum" -> "actum"), applied by hand here — not
+# live-query-verified (see TODO.md). English has no separate Monastic
+# variant in the source.
+id: vespers-hymn-tuesday
+text:
+  la: |
+    Tellúris ingens Cónditor,
+    Mundi solum qui éruens,
+    Pulsis aquæ moléstiis,
+    Terram dedíst[i] immóbilem:
+
+    Ut germen aptum próferens,
+    Fulvis decóra flóribus,
+    Fecúnda fructu sísteret,
+    Pastúmque gratum rédderet.
+
+    Mentis perústæ vúlnera
+    Munda viróre grátiæ:
+    Ut facta fletu díluat,
+    Motúsque pravos átterat.
+
+    Jussis tuis obtémperet:
+    Nullis malis appróximet:
+    Bonis repléri gáudeat,
+    Et mortis actum nésciat.
+
+    Præsta, Pater piíssime,
+    Patríque compar Únice,
+    Cum Spíritu Paráclito
+    Regnans per omne sǽculum.
+    Amen.
+  en: |
+    Earth's mighty Maker, whose command
+    Raised from the sea the solid land;
+    And drove each billowy heap away,
+    And bade the earth stand firm for aye:
+
+    That so, with flowers of golden hue,
+    The seeds of each it might renew;
+    And fruit-trees bearing fruit might yield,
+    And pleasant pasture of the field:
+
+    Our spirit's rankling wounds efface
+    With dewy freshness of thy grace:
+    That grief may cleanse each deed of ill,
+    And o'er each lust may triumph still.
+
+    Let every soul thy law obey,
+    And keep from every evil way;
+    Rejoice each promised good to win,
+    And flee from every mortal sin.
+
+    Hear thou our prayer, Almighty King!
+    Hear thou our praises, while we sing,
+    Adoring with the heavenly host,
+    The Father, Son, and Holy Ghost!
+    Amen.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-hymn-wednesday.yml

@@ -0,0 +1,64 @@
+# Sourced from Divinum Officium's Monastic block ("[HymnusM Day3 Vespera]",
+# Psalterium/Special/Major Special.txt): three substitutions against the
+# base "[Hymnus Day3 Vespera]" text ("mundi plagas" -> "centrum poli";
+# "Dum solis accéndis rotam" -> "Solis rotam constítuens"; "Expélle noctem
+# córdium:" -> "Illúmina cor hóminum,"), applied by hand here — not
+# live-query-verified (see TODO.md). English has no separate Monastic
+# variant in the source.
+id: vespers-hymn-wednesday
+text:
+  la: |
+    Cæli Deus sanctíssime,
+    Qui lúcidas centrum poli
+    Candóre pingis ígneo,
+    Augens decóro lúmine:
+
+    Quarto die qui flámmeam
+    Solis rotam constítuens,
+    Lunæ minístras órdinem,
+    Vagósque cursus síderum:
+
+    Ut nóctibus, vel lúmini
+    Diremptiónis términum,
+    Primórdiis et ménsium
+    Signum dares notíssimum;
+
+    Illúmina cor hóminum,
+    Abstérge sordes méntium:
+    Resólve culpæ vínculum:
+    Evérte moles críminum.
+
+    Præsta, Pater piíssime,
+    Patríque compar Únice,
+    Cum Spíritu Paráclito
+    Regnans per omne sǽculum.
+    Amen.
+  en: |
+    O God, whose hand hath spread the sky,
+    And all its shining hosts on high,
+    And painting it with fiery light,
+    Made it so beauteous and so bright:
+
+    Thou, when the fourth day was begun,
+    Didst frame the circle of the sun,
+    And set the moon for ordered change,
+    And planets for their wider range:
+
+    To night and day, by certain line,
+    Their varying bounds thou didst assign;
+    And gav'st a signal, known and meet,
+    For months begun and months complete.
+
+    Enlighten thou the hearts of men:
+    Polluted souls make pure again:
+    Unloose the bands of guilt within:
+    Remove the burden of our sin.
+
+    Grant this, O Father, ever One
+    With Christ thy sole-begotten Son,
+    Whom, with the Spirit we adore,
+    One God, both now and evermore.
+    Amen.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-responsory-advent.yml

@@ -0,0 +1,23 @@
+# Sourced from Divinum Officium's Monastic block ("[Responsory Adv
+# Vespera_]", the non-Cistercian branch "[Responsory Adv Vespera]"
+# resolves to — Psalterium/Special/Major Special.txt). Not
+# live-query-verified (see TODO.md) — read directly from source.
+id: vespers-responsory-advent
+text:
+  la: |
+    R.br. Osténde nobis Dómine * Misericórdiam tuam.
+    R. Osténde nobis Dómine * Misericórdiam tuam.
+    V. Et salutáre tuum da nobis.
+    R. Misericórdiam tuam.
+    V. Glória Patri, et Fílio, * et Spirítui Sancto.
+    R. Osténde nobis Dómine * Misericórdiam tuam.
+  en: |
+    R.br. Show us, O Lord, * thy mercy.
+    R. Show us, O Lord, * thy mercy.
+    V. And grant us thy salvation.
+    R. Thy mercy.
+    V. Glory be to the Father, and to the Son, * and to the Holy Ghost.
+    R. Show us, O Lord, * thy mercy.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-responsory-ferial.yml

@@ -0,0 +1,23 @@
+# Sourced from Divinum Officium's Monastic block ("[Responsory Feria
+# Vespera_]", the non-Cistercian branch "[Responsory Feria Vespera]"
+# resolves to — Psalterium/Special/Major Special.txt). Shared Mon-Fri.
+# Not live-query-verified (see TODO.md) — read directly from source.
+id: vespers-responsory-ferial
+text:
+  la: |
+    R.br. Benedícam Dóminum * In omni témpore.
+    R. Benedícam Dóminum * In omni témpore.
+    V. Semper laus ejus in ore meo.
+    R. In omni témpore.
+    V. Glória Patri, et Fílio, * et Spirítui Sancto.
+    R. Benedícam Dóminum * In omni témpore.
+  en: |
+    R.br. I will bless the Lord * at all times.
+    R. I will bless the Lord * at all times.
+    V. His praise shall be always in my mouth.
+    R. At all times.
+    V. Glory be to the Father, and to the Son, * and to the Holy Ghost.
+    R. I will bless the Lord * at all times.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-responsory-lent.yml

@@ -0,0 +1,22 @@
+# Sourced from Divinum Officium's Monastic block ("[Responsory Quad
+# Vespera]", Psalterium/Special/Major Special.txt). Not
+# live-query-verified (see TODO.md) — read directly from source.
+id: vespers-responsory-lent
+text:
+  la: |
+    R.br. Scápulis suis * obumbrábit tibi.
+    R. Scápulis suis * obumbrábit tibi.
+    V. Et sub pennis ejus sperábis.
+    R. Obumbrábit tibi.
+    V. Glória Patri, et Fílio, * et Spirítui Sancto.
+    R. Scápulis suis * obumbrábit tibi.
+  en: |
+    R.br. He will overshadow * thee with his shoulders.
+    R. He will overshadow * thee with his shoulders.
+    V. And under his wings thou shalt trust.
+    R. Thee with his shoulders.
+    V. Glory be to the Father, and to the Son, * and to the Holy Ghost.
+    R. He will overshadow * thee with his shoulders.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-responsory-paschaltide.yml

@@ -0,0 +1,25 @@
+# Sourced from Divinum Officium's Monastic block: "[Responsory Pasch
+# Vespera]" resolves (non-Cistercian branch) to "@Psalterium/Special/
+# Minor Special:Responsory breve Pasch Sexta" (Psalterium/Special/Minor
+# Special.txt) — distinct from Lauds' own Paschaltide responsory (see
+# lauds-responsory-paschaltide.yml). Not live-query-verified (see
+# TODO.md) — read directly from source.
+id: vespers-responsory-paschaltide
+text:
+  la: |
+    R.br. Surréxit Dóminus vere, * Allelúja, allelúja.
+    R. Surréxit Dóminus vere, * Allelúja, allelúja.
+    V. Et appáruit Simóni.
+    R. Allelúja, allelúja.
+    V. Glória Patri, et Fílio, * et Spirítui Sancto.
+    R. Surréxit Dóminus vere, * Allelúja, allelúja.
+  en: |
+    R.br. The Lord is risen indeed, * alleluia, alleluia.
+    R. The Lord is risen indeed, * alleluia, alleluia.
+    V. And hath appeared to Simon.
+    R. Alleluia, alleluia.
+    V. Glory be to the Father, and to the Son, * and to the Holy Ghost.
+    R. The Lord is risen indeed, * alleluia, alleluia.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-responsory-passiontide.yml

@@ -0,0 +1,21 @@
+# Sourced from Divinum Officium's Monastic block ("[Responsory Quad5
+# Vespera_]", the non-Cistercian branch "[Responsory Quad5 Vespera]"
+# resolves to — Psalterium/Special/Major Special.txt). Not
+# live-query-verified (see TODO.md) — read directly from source.
+id: vespers-responsory-passiontide
+text:
+  la: |
+    R.br. De ore leónis * líbera me, Dómine.
+    R. De ore leónis * líbera me, Dómine.
+    V. Et a córnibus unicórnium humilitátem meam.
+    R. Líbera me, Dómine.
+    R. De ore leónis * líbera me, Dómine.
+  en: |
+    R.br. From the lion's mouth, * O Lord, save me.
+    R. From the lion's mouth, * O Lord, save me.
+    V. And my lowness from the horns of the unicorns.
+    R. O Lord, save me.
+    R. From the lion's mouth, * O Lord, save me.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-responsory-saturday.yml

@@ -0,0 +1,22 @@
+# Sourced from Divinum Officium's Monastic block ("[Responsory Feria
+# Vespera] (feria 7)", Psalterium/Special/Major Special.txt). Not
+# live-query-verified (see TODO.md) — read directly from source.
+id: vespers-responsory-saturday
+text:
+  la: |
+    R.br. Magnus Dóminus noster, * et magna virtus ejus.
+    R. Magnus Dóminus noster, * et magna virtus ejus.
+    V. Et sapiéntiæ ejus non est númerus.
+    R. Et magna virtus ejus.
+    V. Glória Patri, et Fílio, * et Spirítui Sancto.
+    R. Magnus Dóminus noster, * et magna virtus ejus.
+  en: |
+    R.br. Great is our Lord, * and great is his power.
+    R. Great is our Lord, * and great is his power.
+    V. And of his wisdom there is no number.
+    R. And great is his power.
+    V. Glory be to the Father, and to the Son, * and to the Holy Ghost.
+    R. Great is our Lord, * and great is his power.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-responsory-sunday.yml

@@ -0,0 +1,22 @@
+# Sourced from Divinum Officium's Monastic block ("[Responsory Dominica
+# Vespera]", Psalterium/Special/Major Special.txt). Not live-query-verified
+# (see TODO.md) — read directly from source.
+id: vespers-responsory-sunday
+text:
+  la: |
+    R.br. Quam magnificáta sunt * ópera tua, Dómine.
+    R. Quam magnificáta sunt * ópera tua, Dómine.
+    V. Ómnia in sapiéntia fecísti.
+    R. Ópera tua Dómine.
+    V. Glória Patri, et Fílio, * et Spirítui Sancto.
+    R. Quam magnificáta sunt * ópera tua, Dómine.
+  en: |
+    R.br. How great are thy works, * O Lord.
+    R. How great are thy works, * O Lord.
+    V. Thou hast made all things in wisdom.
+    R. Thy works, O Lord.
+    V. Glory be to the Father, and to the Son, * and to the Holy Ghost.
+    R. How great are thy works, * O Lord.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-versicle-advent.yml

@@ -0,0 +1,15 @@
+# The versicle right before the Magnificat, in Advent — the famous
+# "Rorate cæli". Sourced from Divinum Officium's Monastic block ("[Adv
+# Versum 3]", Psalterium/Special/Major Special.txt). Not
+# live-query-verified (see TODO.md) — read directly from source.
+id: vespers-versicle-advent
+text:
+  la: |
+    V. Roráte, cæli, désuper, et nubes pluant justum.
+    R. Aperiátur terra, et gérminet Salvatórem.
+  en: |
+    V. Drop down dew, ye heavens, from above, and let the clouds rain the Just.
+    R. Let the earth be opened, and bud forth the Saviour.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-versicle-lent.yml

@@ -0,0 +1,17 @@
+# The versicle right before the Magnificat, in Lent. Sourced from Divinum
+# Officium's Monastic block ("[Quad Versum 3]", Psalterium/Special/Major
+# Special.txt) — "[Quad Versum 2]" (Lauds' own) is a bare alias to this
+# same text, so Lauds and Vespers share it here too (see
+# lauds-versicle-lent.yml). Not live-query-verified (see TODO.md) — read
+# directly from source.
+id: vespers-versicle-lent
+text:
+  la: |
+    V. Ángelis suis Deus mandávit de te.
+    R. Ut custódiant te in ómnibus viis tuis.
+  en: |
+    V. God hath given His Angels charge over thee.
+    R. To keep thee in all thy ways.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-versicle-paschaltide.yml

@@ -0,0 +1,16 @@
+# The versicle right before the Magnificat, in Paschaltide. Sourced from
+# Divinum Officium's Monastic block ("[Pasch Versum 3]", Psalterium/
+# Special/Major Special.txt). Distinct from Lauds' own Paschaltide
+# versicle (see lauds-versicle-paschaltide.yml). Not live-query-verified
+# (see TODO.md) — read directly from source.
+id: vespers-versicle-paschaltide
+text:
+  la: |
+    V. Mane nobíscum, Dómine, allelúja.
+    R. Quóniam advesperáscit, allelúja.
+  en: |
+    V. Stay with us, O Lord, alleluia.
+    R. Because it is towards evening, alleluia.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-versicle-passiontide.yml

@@ -0,0 +1,16 @@
+# The versicle right before the Magnificat, in Passiontide. Sourced from
+# Divinum Officium's Monastic block ("[Quad5 Versum 3_]", the
+# non-Cistercian branch "[Quad5 Versum 3]" resolves to — Psalterium/
+# Special/Major Special.txt). Not live-query-verified (see TODO.md) —
+# read directly from source.
+id: vespers-versicle-passiontide
+text:
+  la: |
+    V. Éripe me, Dómine, ab hómine malo.
+    R. A viro iníquo éripe me.
+  en: |
+    V. Deliver me, O Lord, from the evil man.
+    R. Rescue me from the unjust man.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-versicle-saturday.yml

@@ -0,0 +1,16 @@
+# The versicle right before the Magnificat. Sourced from Divinum
+# Officium's Monastic block ("[Feria Versum 3] (feria 7)", Psalterium/
+# Special/Major Special.txt) — Saturday has its own, distinct from Sunday/
+# the weekdays. Not live-query-verified (see TODO.md) — read directly from
+# source.
+id: vespers-versicle-saturday
+text:
+  la: |
+    V. Vespertína orátio ascéndat ad te, Dómine.
+    R. Et descéndat super nos misericórdia tua.
+  en: |
+    V. Let the evening prayer ascend unto thee, O Lord.
+    R. And let there descend upon us thy mercy.
+status:
+  la: draft
+  en: draft

src/data/propers/common/vespers-versicle-sunday-ferial.yml

@@ -0,0 +1,16 @@
+# The versicle right before the Magnificat. Sourced from Divinum
+# Officium's Monastic block: "[Dominica Versum 3]" gives the text
+# directly; "[Feria Versum 3] = @:Dominica Versum 3" (Mon-Fri) is a bare
+# alias to the same text — so Sunday and the five weekdays share this one.
+# Not live-query-verified (see TODO.md) — read directly from source.
+id: vespers-versicle-sunday-ferial
+text:
+  la: |
+    V. Dirigátur, Dómine, orátio mea.
+    R. Sicut incénsum in conspéctu tuo.
+  en: |
+    V. O Lord, direct my prayer.
+    R. As incense in thy sight.
+status:
+  la: draft
+  en: draft

src/hours/compline.ts

@@ -91,6 +91,9 @@ function resolvePart(part: HourPart, day: LiturgicalDay): ResolvedPart[] {
     case 'suffrages':
     case 'lauds-preces':
     case 'day-collects':
+    case 'vespers-psalmody':
+    case 'vespers-office':
+    case 'magnificat':
       throw new Error(`Compline's ordo doesn't support a '${part.kind}' part`);
   }
 }

src/hours/lauds.ts

@@ -344,6 +344,9 @@ function resolvePart(part: HourPart, day: LiturgicalDay): ResolvedPart[] {
     case 'variable':
     case 'day-collect':
     case 'nunc-dimittis':
+    case 'vespers-psalmody':
+    case 'vespers-office':
+    case 'magnificat':
       throw new Error(`Lauds' ordo doesn't support a '${part.kind}' part`);
   }
 }

src/hours/none.ts

@@ -67,6 +67,9 @@ function resolvePart(part: HourPart, day: LiturgicalDay): ResolvedPart[] {
     case 'suffrages':
     case 'lauds-preces':
     case 'day-collects':
+    case 'vespers-psalmody':
+    case 'vespers-office':
+    case 'magnificat':
       throw new Error(`None's ordo doesn't support a '${part.kind}' part`);
   }
 }

src/hours/prime.ts

@@ -123,6 +123,9 @@ function resolvePart(part: HourPart, date: string, day: LiturgicalDay): Resolved
     case 'suffrages':
     case 'lauds-preces':
     case 'day-collects':
+    case 'vespers-psalmody':
+    case 'vespers-office':
+    case 'magnificat':
       throw new Error(`Prime's ordo doesn't support a '${part.kind}' part`);
   }
 }

src/hours/resolve-common.ts

@@ -1,10 +1,23 @@
 import type { ResolvedPart, ResolvedText } from './types';
-import type { Commemoration, DayWinner, LiturgicalDay } from '../calendar/types';
+import type { Commemoration, DayWinner, LiturgicalDay, Weekday } from '../calendar/types';
 import type { ProperText } from '../propers';
 import { getCommonProper, getTemporalProper } from '../propers';
 import { getSaintRecord } from '../calendar/feasts';
 import { resolveActiveOctave } from '../calendar';
 import { splitAntiphon } from './antiphon';
+import vespersMagnificatAntiphonsData from '../data/hours/vespers-magnificat-antiphons.yml';
+
+type BilingualText = Partial<Record<string, string>>;
+type TranslationStatus = 'verified' | 'draft' | 'missing';
+interface MagnificatWeekdayDefault {
+  antiphon: BilingualText;
+  status?: Partial<Record<string, TranslationStatus>>;
+}
+// Monday-Saturday only — Sunday has no fixed weekday default (its own
+// antiphon varies by Proper of the Time; see the data file's own header).
+const vespersMagnificatAntiphons = vespersMagnificatAntiphonsData as Partial<
+  Record<Weekday, MagnificatWeekdayDefault>
+>;
 
 function toResolvedText(proper: ProperText): ResolvedText {
   return { text: proper.text, status: proper.status, citation: proper.citation };
@@ -163,6 +176,25 @@ export function getMinorHourOverrideId(day: LiturgicalDay): string | undefined {
  */
 const PASCHALTIDE_SEASONS = new Set(['eastertide', 'ascensiontide', 'pentecost']);
 
+/**
+ * Which seasonal office-content suffix (if any) a day's season maps to —
+ * shared by Lauds' and Vespers' own resolveOffice, both of which fall
+ * back to the plain weekday default when this is undefined (and both
+ * check a per-feast/octave override first, ahead of this). Paschaltide
+ * covers eastertide/ascensiontide/pentecost uniformly, matching the
+ * source's own single "Pasch" block for both hours — no separate
+ * Ascension/Pentecost-specific chapter/hymn exists there.
+ */
+export function seasonalOfficeSuffix(season: string): string | undefined {
+  if (season === 'advent' || season === 'lent' || season === 'passiontide') {
+    return season;
+  }
+  if (PASCHALTIDE_SEASONS.has(season)) {
+    return 'paschaltide';
+  }
+  return undefined;
+}
+
 /**
  * The reference engine's mechanical Paschaltide fallback for a Common
  * antiphon with no dedicated wholesale-different text of its own: a
@@ -449,6 +481,48 @@ export function getBenedictusAntiphon(day: LiturgicalDay): ResolvedText {
   return { text: {}, status: { la: 'missing', en: 'missing' } };
 }
 
+/**
+ * Vespers' Magnificat antiphon — mirrors getBenedictusAntiphon's lookup
+ * order exactly (temporal id, then a saint's own `${propers}-magnificat-
+ * antiphon`, then their Common category's `magnificat-antiphon-${common}`
+ * — none of that content authored yet, a separate future pass the same
+ * shape as the Benedictus one was), but with one real difference: a bare
+ * ferial weekday (Mon-Sat) has actual content to fall back to —
+ * data/hours/vespers-magnificat-antiphons.yml's classic "quote the
+ * Magnificat's own text in sequence" set — which Benedictus has no
+ * equivalent of. `withPaschaltideAlleluia` applied to that fallback too,
+ * by analogy with the Common-category treatment above; not independently
+ * confirmed for this specific case.
+ */
+export function getMagnificatAntiphon(day: LiturgicalDay): ResolvedText {
+  const winner = resolveOfficeWinner(day);
+  if (winner.kind === 'temporal') {
+    const named = toResolvedText(getTemporalProper(`${winner.id}-magnificat-antiphon`));
+    if (named.status.la !== 'missing' || named.status.en !== 'missing') {
+      return named;
+    }
+    const weekdayDefault = vespersMagnificatAntiphons[day.weekday];
+    if (weekdayDefault) {
+      const resolved = weekdayDefault.status
+        ? { text: weekdayDefault.antiphon, status: weekdayDefault.status }
+        : verifiedText(weekdayDefault.antiphon);
+      return withPaschaltideAlleluia(resolved, day);
+    }
+    return named;
+  }
+  const saint = getSaintRecord(winner.id);
+  if (saint?.propers) {
+    const proper = resolveCommon(`${saint.propers}-magnificat-antiphon`);
+    if (proper.status.la !== 'missing' || proper.status.en !== 'missing') {
+      return proper;
+    }
+  }
+  if (saint?.benedictusCommon) {
+    return withPaschaltideAlleluia(resolveCommon(`magnificat-antiphon-${saint.benedictusCommon}`), day);
+  }
+  return { text: {}, status: { la: 'missing', en: 'missing' } };
+}
+
 export function verifiedText(text: Partial<Record<string, string>>): ResolvedText {
   const status: Partial<Record<string, 'verified'>> = {};
   for (const lang of Object.keys(text)) {

src/hours/sext.ts

@@ -67,6 +67,9 @@ function resolvePart(part: HourPart, day: LiturgicalDay): ResolvedPart[] {
     case 'suffrages':
     case 'lauds-preces':
     case 'day-collects':
+    case 'vespers-psalmody':
+    case 'vespers-office':
+    case 'magnificat':
       throw new Error(`Sext's ordo doesn't support a '${part.kind}' part`);
   }
 }

src/hours/terce.ts

@@ -67,6 +67,9 @@ function resolvePart(part: HourPart, day: LiturgicalDay): ResolvedPart[] {
     case 'suffrages':
     case 'lauds-preces':
     case 'day-collects':
+    case 'vespers-psalmody':
+    case 'vespers-office':
+    case 'magnificat':
       throw new Error(`Terce's ordo doesn't support a '${part.kind}' part`);
   }
 }

src/hours/types.ts

@@ -105,6 +105,29 @@ export type HourPart =
   // data/propers/common/lauds-{capitulum,responsory,hymn,versicle}-*.yml.
   // Expands into 4 ResolvedParts (chapter, responsory, hymn, versicle).
   | { kind: 'lauds-office' }
+  // Vespers only. The weekday-resolved 4-psalm-group psalmody — see
+  // hours/vespers.ts and data/hours/vespers-antiphons.yml. Opaque for the
+  // same reason as 'lauds-psalmody': each group's antiphon covers either
+  // one whole psalm, two whole psalms said together under one shared
+  // antiphon (Ps 115+116, Monday), or two verse-ranges of one psalm split
+  // under one shared antiphon (Ps 138/143, Thu/Fri) — no existing part
+  // kind represents that. No per-feast override mechanism yet (unlike
+  // Lauds' getPsalmodyOverrideFor) — every day renders the plain weekday
+  // default for now.
+  | { kind: 'vespers-psalmody' }
+  // Vespers only. The weekday-resolved chapter/short-responsory/hymn/
+  // versicle bundle that follows the psalmody — see hours/vespers.ts and
+  // data/propers/common/vespers-{capitulum,responsory,hymn,versicle}-*.yml.
+  // Expands into 4 ResolvedParts (chapter, responsory, hymn, versicle).
+  | { kind: 'vespers-office' }
+  // Vespers only. Magnificat (Luke 1:46-55), fixed text, framed by a
+  // day-resolved antiphon — see hours/resolve-common.ts's
+  // getMagnificatAntiphon, which mirrors getBenedictusAntiphon's
+  // saint/temporal-id lookup but also falls back to a real weekday
+  // default (data/hours/vespers-magnificat-antiphons.yml, Mon-Sat) that
+  // Benedictus has no equivalent of. Same incipit-or-full/full-after
+  // framing as benedictus/nunc-dimittis, gated by isDoubleOrHigher.
+  | { kind: 'magnificat' }
   // Lauds only. Benedictus (Luke 1:68-79), fixed text (see propers/common/
   // benedictus.yml) framed by a day-resolved antiphon (see hours/
   // resolve-common.ts's getBenedictusAntiphon) — same incipit-or-full/

src/hours/vespers.ts

@@ -1,7 +1,167 @@
-import type { ResolvedOrdo } from './types';
+import type { HourDefinition, HourPart, ResolvedOrdo, ResolvedPart } from './types';
+import type { LiturgicalDay, Weekday } from '../calendar/types';
+import { resolveEveningDay } from '../calendar/vespers';
+import { getDayLabel } from '../calendar/day-label';
+import { getPsalmVerses } from '../psalter';
+import { getOpeningVersicleId } from './opening-versicle';
+import { isDoubleOrHigher } from './antiphon';
+import {
+  resolveCommon,
+  getDayCollects,
+  getMagnificatAntiphon,
+  splitNamedAntiphon,
+  resolveOfficeWinner,
+  verifiedText,
+  seasonalOfficeSuffix,
+} from './resolve-common';
+import vespersDefinitionData from '../data/hours/vespers.yml';
+import vespersAntiphonsData from '../data/hours/vespers-antiphons.yml';
 
-// Milestone 4, alongside Lauds — also has the first/second-Vespers overlap
+const vespersDefinition = vespersDefinitionData as HourDefinition;
-// wrinkle (see OccurringFeast.vespersFrom). Not built yet.
+
-export function resolveOrdo(date: string): ResolvedOrdo {
+type BilingualText = Partial<Record<string, string>>;
-  return { hourId: 'vespers', date, parts: [], notImplemented: true };
+/** A whole psalm, or a `{number, verses}` verse-range slice of one — same
+ * shape as psalter/distribution.ts's PsalmRef, needed here (unlike Lauds'
+ * plain `psalms: number[]`) because two of the week's groups split a
+ * single psalm into two ranges under one shared antiphon — see
+ * vespers-antiphons.yml's own header. */
+type PsalmRefLike = number | { number: number; verses?: string };
+interface VespersGroup {
+  psalms: PsalmRefLike[];
+  antiphon: BilingualText;
+}
+interface VespersDay {
+  groups: VespersGroup[];
+}
+const vespersAntiphons = vespersAntiphonsData as Record<Weekday, VespersDay>;
+
+function normalizePsalmRef(ref: PsalmRefLike): { number: number; verses?: string } {
+  return typeof ref === 'number' ? { number: ref } : ref;
+}
+
+/** One group's worth of psalm(s) under one shared antiphon — the antiphon
+ * opens (incipit-or-full) before the first psalm/verse-range and repeats
+ * in full once, after the last. Mirrors lauds.ts's psalmParts, extended
+ * for verse-range entries (see PsalmRefLike). */
+function psalmParts(group: VespersGroup, day: LiturgicalDay): ResolvedPart[] {
+  const { incipit, full } = splitNamedAntiphon(verifiedText(group.antiphon));
+  const opening = isDoubleOrHigher(resolveOfficeWinner(day)) ? full : incipit;
+  const refs = group.psalms.map(normalizePsalmRef);
+  const parts: ResolvedPart[] = refs.map((ref, i) => ({
+    kind: 'psalm' as const,
+    psalmNumber: ref.number,
+    antiphon: i === 0 ? opening : undefined,
+    verses: getPsalmVerses(ref.number, ref.verses).map((v) => ({ n: v.n, text: v.text, status: v.status })),
+  }));
+  parts.push({ kind: 'antiphon', text: full });
+  return parts;
+}
+
+/** The 4 weekday-variable psalm groups — no fixed leading/trailing psalm
+ * the way Lauds has (Ps 66 / the Laudate psalms); Vespers is just these 4
+ * groups in sequence. No per-feast override mechanism yet — see
+ * hours/types.ts's 'vespers-psalmody' doc comment. */
+function resolvePsalmody(day: LiturgicalDay): ResolvedPart[] {
+  const wd = vespersAntiphons[day.weekday];
+  return wd.groups.flatMap((group) => psalmParts(group, day));
+}
+
+function vespersCapitulumId(weekday: Weekday): string {
+  return weekday === 'saturday' ? 'vespers-capitulum-saturday' : 'vespers-capitulum-sunday-ferial';
+}
+
+function vespersResponsoryId(weekday: Weekday): string {
+  if (weekday === 'sunday') return 'vespers-responsory-sunday';
+  if (weekday === 'saturday') return 'vespers-responsory-saturday';
+  return 'vespers-responsory-ferial';
+}
+
+function vespersVersicleId(weekday: Weekday): string {
+  return weekday === 'saturday' ? 'vespers-versicle-saturday' : 'vespers-versicle-sunday-ferial';
+}
+
+/** The chapter/responsory/hymn/versicle bundle following the psalmody —
+ * see hours/types.ts's 'vespers-office' doc comment. No per-feast
+ * override mechanism yet, unlike Lauds' resolveOffice. Falls to a
+ * *seasonal* default first (Advent/Lent/Passiontide/Paschaltide — see
+ * resolve-common.ts's seasonalOfficeSuffix), then the plain weekday
+ * default. */
+function resolveOffice(day: LiturgicalDay): ResolvedPart[] {
+  const seasonSuffix = seasonalOfficeSuffix(day.season);
+  const key = seasonSuffix ?? day.weekday;
+  return [
+    {
+      kind: 'chapter',
+      text: resolveCommon(seasonSuffix ? `vespers-capitulum-${key}` : vespersCapitulumId(day.weekday)),
+    },
+    {
+      kind: 'responsory',
+      text: resolveCommon(seasonSuffix ? `vespers-responsory-${key}` : vespersResponsoryId(day.weekday)),
+    },
+    { kind: 'hymn', text: resolveCommon(`vespers-hymn-${key}`) },
+    {
+      kind: 'versicle',
+      text: resolveCommon(seasonSuffix ? `vespers-versicle-${key}` : vespersVersicleId(day.weekday)),
+    },
+  ];
+}
+
+function resolvePart(part: HourPart, day: LiturgicalDay): ResolvedPart[] {
+  switch (part.kind) {
+    case 'opening-versicle':
+      return [{ kind: 'versicle', text: resolveCommon(getOpeningVersicleId(day.season, day.winner)) }];
+    case 'vespers-psalmody':
+      return resolvePsalmody(day);
+    case 'vespers-office':
+      return resolveOffice(day);
+    case 'magnificat': {
+      const { incipit, full } = splitNamedAntiphon(getMagnificatAntiphon(day));
+      const opening = isDoubleOrHigher(resolveOfficeWinner(day)) ? full : incipit;
+      return [
+        { kind: 'canticle', canticleId: 'magnificat', text: resolveCommon('magnificat'), antiphon: opening },
+        { kind: 'antiphon', text: full },
+      ];
+    }
+    case 'day-collects':
+      return getDayCollects(day);
+    case 'preces':
+      return [{ kind: 'preces', text: resolveCommon(part.textRef.id), label: part.label }];
+    case 'versicle':
+    case 'chapter':
+    case 'responsory':
+    case 'prayer':
+      return [{ kind: part.kind, text: resolveCommon(part.textRef.id) }];
+    // Not used by Vespers.
+    case 'hymn':
+    case 'lesson':
+    case 'psalm':
+    case 'canticle':
+    case 'martyrology':
+    case 'rule-reading':
+    case 'creed':
+    case 'closing-antiphon':
+    case 'by-day-kind':
+    case 'variable':
+    case 'day-collect':
+    case 'nunc-dimittis':
+    case 'lauds-psalmody':
+    case 'lauds-office':
+    case 'benedictus':
+    case 'suffrages':
+    case 'lauds-preces':
+    case 'marian-antiphon':
+      throw new Error(`Vespers' ordo doesn't support a '${part.kind}' part`);
+  }
+}
+
+export function resolveOrdo(date: string): ResolvedOrdo {
+  // Every part below is an evening-hour concern, same reasoning as
+  // Compline — resolves off whichever day's identity actually governs
+  // tonight, including the cross-day commemoration folded into
+  // day.commemorations by resolveEveningDay itself (see calendar/
+  // vespers.ts) — getDayCollects picks that up for free, no special
+  // handling needed here.
+  const day = resolveEveningDay(date);
+  const parts = vespersDefinition.parts.flatMap((part) => resolvePart(part, day));
+  return { hourId: 'vespers', date, parts, dayLabel: getDayLabel(day) };
 }

tests/hours/prime.test.ts

@@ -226,8 +226,8 @@ describe('resolveOrdo("prime", ...)', () => {
 });
 
 describe('resolveOrdo for not-yet-built hours', () => {
-  it('flags vespers as not implemented rather than throwing', () => {
+  it('flags matins as not implemented rather than throwing', () => {
-    const ordo = resolveOrdo('vespers', MONDAY);
+    const ordo = resolveOrdo('matins', MONDAY);
     expect(ordo.notImplemented).toBe(true);
     expect(ordo.parts).toEqual([]);
   });

tests/hours/vespers.test.ts

@@ -0,0 +1,138 @@
+import { describe, expect, it } from 'vitest';
+import { resolveOrdo } from '../../src/hours';
+
+describe('resolveOrdo("vespers", ...)', () => {
+  it('is implemented and resolves Sunday psalmody in order', () => {
+    // 2026-08-16 is a Sunday, in ordinary time — no First Vespers claim
+    // from the following Monday (a plain feria), so this stays Sunday's
+    // own Second Vespers.
+    const ordo = resolveOrdo('vespers', '2026-08-16');
+    expect(ordo.notImplemented).toBeUndefined();
+    expect(ordo.hourId).toBe('vespers');
+
+    const psalmNumbers = ordo.parts
+      .filter((p) => p.kind === 'psalm')
+      .map((p) => (p.kind === 'psalm' ? p.psalmNumber : undefined));
+    expect(psalmNumbers).toEqual([109, 110, 111, 112]);
+  });
+
+  it('joins Ps 115 and 116 under one shared antiphon on Monday', () => {
+    // 2026-08-17 is a Monday, in ordinary time.
+    const ordo = resolveOrdo('vespers', '2026-08-17');
+    const psalmParts = ordo.parts.filter((p) => p.kind === 'psalm');
+    const numbers = psalmParts.map((p) => (p.kind === 'psalm' ? p.psalmNumber : undefined));
+    expect(numbers).toEqual([113, 114, 115, 116, 128]);
+
+    // Ps 116 (the second half of the joined pair) carries no antiphon of
+    // its own — only Ps 115 (the group's first entry) does.
+    const ps115 = psalmParts[2];
+    const ps116 = psalmParts[3];
+    expect(ps115?.kind === 'psalm' ? ps115.antiphon : undefined).toBeDefined();
+    expect(ps116?.kind === 'psalm' ? ps116.antiphon : undefined).toBeUndefined();
+  });
+
+  it('splits Ps 138 into two verse-ranges under one shared antiphon on Thursday', () => {
+    // 2026-08-20 is a Thursday, in ordinary time.
+    const ordo = resolveOrdo('vespers', '2026-08-20');
+    const psalmParts = ordo.parts.filter((p) => p.kind === 'psalm');
+    const numbers = psalmParts.map((p) => (p.kind === 'psalm' ? p.psalmNumber : undefined));
+    expect(numbers).toEqual([138, 138, 139, 140]);
+
+    const [firstHalf, secondHalf] = psalmParts;
+    expect(firstHalf?.kind === 'psalm' ? firstHalf.verses.every((v) => v.n >= 1 && v.n <= 10) : false).toBe(true);
+    expect(secondHalf?.kind === 'psalm' ? secondHalf.verses.every((v) => v.n >= 11 && v.n <= 24) : false).toBe(true);
+    expect(secondHalf?.kind === 'psalm' ? secondHalf.antiphon : undefined).toBeUndefined();
+  });
+
+  it("resolves Saturday's own distinct chapter, responsory, hymn, and versicle", () => {
+    // 2026-08-15 is a Saturday and the Assumption (Duplex I. classis) —
+    // well above keepsOwnSecondVespers's threshold, so it keeps its own
+    // Vespers (weekday stays 'saturday') rather than ceding to tomorrow.
+    // No per-feast Vespers-office override exists yet (see hours/
+    // vespers.ts), so the plain Saturday weekday default still renders
+    // here regardless of the Assumption's own rank — exactly what this
+    // test wants to check.
+    const ordo = resolveOrdo('vespers', '2026-08-15');
+    const chapter = ordo.parts.find((p) => p.kind === 'chapter');
+    expect(chapter?.kind === 'chapter' ? chapter.text.citation?.en : undefined).toBe('Rom 11:33');
+
+    const hymn = ordo.parts.find((p) => p.kind === 'hymn');
+    expect(hymn?.kind === 'hymn' ? hymn.text.text.la : undefined).toContain('O lux beáta Trínitas');
+
+    const versicle = ordo.parts.find((p) => p.kind === 'versicle' && p.text.text.la?.includes('Vespertína'));
+    expect(versicle).toBeDefined();
+  });
+
+  it('falls back to the classic weekday-default Magnificat antiphon on a bare ferial', () => {
+    // 2026-06-16 is a Tuesday, plain ordinary trinitytide, no saint, no
+    // active octave (same date already used by calendar/vespers.test.ts's
+    // "does not anticipate between two plain ferias").
+    const ordo = resolveOrdo('vespers', '2026-06-16');
+    const magnificatIndex = ordo.parts.findIndex((p) => p.kind === 'canticle' && p.canticleId === 'magnificat');
+    expect(magnificatIndex).toBeGreaterThanOrEqual(0);
+    const magnificat = ordo.parts[magnificatIndex];
+    expect(magnificat?.kind === 'canticle' ? magnificat.text.text.la : undefined).toContain('Magníficat ✠ ánima mea');
+    // The closing full-antiphon repeat is the very next part.
+    const closingAntiphon = ordo.parts[magnificatIndex + 1];
+    expect(closingAntiphon?.kind === 'antiphon' ? closingAntiphon.text.text.la : undefined).toContain('Exsúltet');
+  });
+
+  it('folds the cross-day Vespers commemoration into day-collects (St. James keeps Vespers, St. Anne commemorated)', () => {
+    // St. Christopher (same-day collision, commemorated under James
+    // already at the calendar level) and St. Anne (the cross-day Vespers
+    // commemoration from calendar/vespers.ts) are both sanctoral, so both
+    // render as 'preces' parts (see resolve-common.ts's
+    // sanctoralCommemorationPart) — only a *temporal* commemoration
+    // renders as 'prayer'.
+    const ordo = resolveOrdo('vespers', '2026-07-25');
+    const collectParts = ordo.parts.filter((p) => p.kind === 'prayer' || p.kind === 'preces');
+    // James's own collect ('prayer') + Christopher's + Anne's commemorations ('preces').
+    expect(collectParts.length).toBeGreaterThanOrEqual(3);
+    const anne = ordo.parts.find((p) => p.kind === 'preces' && p.label?.includes('Anne'));
+    expect(anne).toBeDefined();
+  });
+
+  it("renders Advent's seasonal chapter/hymn/versicle instead of the plain weekday default", () => {
+    // 2025-12-02 is a Tuesday in Advent (St. Bibiana, Simplex, merely
+    // commemorated — the day's own winner stays temporal either way).
+    const ordo = resolveOrdo('vespers', '2025-12-02');
+    const chapter = ordo.parts.find((p) => p.kind === 'chapter');
+    expect(chapter?.kind === 'chapter' ? chapter.text.citation?.en : undefined).toBe('Gen 49:10');
+    const hymn = ordo.parts.find((p) => p.kind === 'hymn');
+    expect(hymn?.kind === 'hymn' ? hymn.text.text.la : undefined).toContain('Cónditor alme síderum');
+    const versicle = ordo.parts.find((p) => p.kind === 'versicle' && p.text.text.la?.includes('Roráte'));
+    expect(versicle).toBeDefined();
+  });
+
+  it("renders Lent's seasonal office", () => {
+    // 2026-03-03 is a Tuesday in Lent, before Passiontide.
+    const ordo = resolveOrdo('vespers', '2026-03-03');
+    const chapter = ordo.parts.find((p) => p.kind === 'chapter');
+    expect(chapter?.kind === 'chapter' ? chapter.text.citation?.en : undefined).toBe('Joel 2:17');
+    const hymn = ordo.parts.find((p) => p.kind === 'hymn');
+    expect(hymn?.kind === 'hymn' ? hymn.text.text.la : undefined).toContain('Audi, benígne Cónditor');
+  });
+
+  it("renders Passiontide's seasonal office, with the Gloria Patri omitted from the responsory", () => {
+    // 2026-03-25 is a Wednesday in Passiontide (Passion Sunday 2026-03-22
+    // through Holy Saturday 2026-04-04).
+    const ordo = resolveOrdo('vespers', '2026-03-25');
+    const chapter = ordo.parts.find((p) => p.kind === 'chapter');
+    expect(chapter?.kind === 'chapter' ? chapter.text.citation?.en : undefined).toBe('Jer 11:20');
+    const responsory = ordo.parts.find((p) => p.kind === 'responsory');
+    expect(responsory?.kind === 'responsory' ? responsory.text.text.la : undefined).not.toContain('Glória Patri');
+    const hymn = ordo.parts.find((p) => p.kind === 'hymn');
+    expect(hymn?.kind === 'hymn' ? hymn.text.text.la : undefined).toContain('Vexílla Regis pródeunt');
+  });
+
+  it("renders Paschaltide's seasonal office, sharing its chapter with Lauds", () => {
+    // 2026-04-20 is in eastertide (Easter 2026-04-05).
+    const ordo = resolveOrdo('vespers', '2026-04-20');
+    const chapter = ordo.parts.find((p) => p.kind === 'chapter');
+    expect(chapter?.kind === 'chapter' ? chapter.text.citation?.en : undefined).toBe('Rom 6:9-10');
+    const hymn = ordo.parts.find((p) => p.kind === 'hymn');
+    expect(hymn?.kind === 'hymn' ? hymn.text.text.la : undefined).toContain('Ad cenam Agni próvidi');
+    const versicle = ordo.parts.find((p) => p.kind === 'versicle' && p.text.text.la?.includes('Mane nobíscum'));
+    expect(versicle).toBeDefined();
+  });
+});

tests/ui/shell.test.ts

@@ -41,12 +41,12 @@ describe('shell', () => {
     const root = document.getElementById('app')!;
     mountShell(root);
 
-    const vespersBtn = Array.from(root.querySelectorAll<HTMLButtonElement>('[data-hour]')).find(
+    const matinsBtn = Array.from(root.querySelectorAll<HTMLButtonElement>('[data-hour]')).find(
-      (btn) => btn.dataset.hour === 'vespers',
+      (btn) => btn.dataset.hour === 'matins',
     );
-    vespersBtn?.click();
+    matinsBtn?.click();
 
-    expect(root.querySelector('.hour-view h2')?.textContent).toBe('Vespers');
+    expect(root.querySelector('.hour-view h2')?.textContent).toBe('Matins');
     expect(root.querySelector('.hour-view-pending')).not.toBeNull();
   });