Same gap and same generic mechanism fix as Ascension/Pentecost --
just needed the ids added to ALWAYS_OVERRIDE_TEMPORAL_IDS plus real
content. Both feasts have 3 genuinely different hymns, one per hour:
Corpus Christi's own are widely known outside this context too
("Sacris solémniis" at Matins, "Verbum supérnum pródiens" at Lauds
whose last 2 stanzas are "O Salutaris Hostia", "Pange, lingua,
gloriósi Córporis mystérium" at Vespers whose last 2 stanzas are
"Tantum Ergo").
Sacred Heart needed one source-track correction: Monastic Tridentinum
1617 doesn't observe this feast on this date at all (shows St.
Barnabas instead) -- used Divino Afflatu 1954 instead, this project's
own stated rubric track. Also live-verified a genuine structural
difference: Sacred Heart's own Lauds/Vespers have no responsory at
all in the source (straight chapter to hymn) -- not an authoring gap.
Fixed lauds.ts's and vespers.ts's own resolveOffice to omit the
responsory part entirely when its status is missing in both
languages, instead of always rendering an empty section.
Authored matins-hymn-{corpus-christi,sacred-heart}.yml,
lauds-{capitulum,responsory,hymn,versicle}-corpus-christi.yml,
vespers-{responsory,hymn,versicle}-corpus-christi.yml,
lauds-{capitulum,hymn,versicle}-sacred-heart.yml, and
vespers-{hymn,versicle}-sacred-heart.yml -- all live-verified,
2026-06-04 and 2026-06-12.
Fixed 2 pre-existing tests whose own dates now land inside these
newly-modeled octaves and were asserting the old fall-through
behavior as if correct: lauds.test.ts's FERIAL_MONDAY (moved off
2026-06-08) and vespers.test.ts's St. Margaret of Scotland test
(2026-06-09) -- its own title already anticipated this fix, just had
the wrong expected values until now.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AGjUyhUZJaSjiniEmnLdak
vu
A static, offline-first PWA for praying the Divine Office — Matins, Lauds, Prime, Terce, Sext, None, Vespers, and Compline — in bilingual Latin/English, for any given date.
This isn't a reconstruction of any single historical breviary. It's a personal design that
draws on several historical sources without reproducing any one of them exactly: hour
structure chiefly from the Monastic Tridentinum (1617), precedence/rubrics from Divino
Afflatu, and a calendar merged from both the Tridentine 1906 and Divino Afflatu calendars,
with more generous handling of commemorations and octaves than any one historical rite used.
See CLAUDE.md (gitignored, not shipped in this repo) or the project's own notes for the full
rationale if you're extending it.
There's no backend and no database — everything is a pre-built static bundle, and the app is designed to keep working fully offline once it's been loaded once.
Development
Requires Node.js (developed against Node 20+).
npm install
npm run dev # start the Vite dev server
npm run build # type-check (tsc --noEmit) and produce a production build in dist/
npm run preview # serve the production build locally
npm test # run the test suite (vitest)
Run a single test file or a subset by name:
npx vitest run tests/hours/vespers.test.ts
npx vitest run -t "some test name"
Running in production
The app is entirely static once built, so "running it" just means serving dist/ — any static
file host works, as long as it falls back to index.html for unknown paths (the app does its
own client-side routing for URLs like /2026-08-09/prime).
Docker
A Dockerfile builds the static bundle with Node and serves it with Caddy:
docker build -t vu .
docker run -p 8080:80 vu
Or with Docker Compose (docker-compose.yml is included):
docker compose up -d --build
This serves the app on http://localhost:8080. Put a reverse proxy/TLS terminator in front of
it for a real deployment; the container itself just listens on port 80 internally and has no
configuration, secrets, or external dependencies.
Without Docker
Any static file server works — build the app, then serve dist/ with SPA-style fallback
routing. For example, with Caddy directly:
npm run build
caddy file-server --root dist --listen :8080
(For a real deployment you'll want a fallback rule so unknown paths resolve to index.html —
see the Caddyfile in this repo for the pattern.)