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RG 497 ("in Missis festivis et votivis Apostolorum et Evangelistarum")
carries no natalicium restriction, unlike RG 475(e)'s Creed clause --
preface_apostle_slugs already includes one non-natalicium sibling (In
Commemoratione S. Pauli, 30 June) on this exact reasoning.
conversion-of-st-paul (25 January) was left off pending a witness: the
FIUV Ordo's own single window has 25 January impeded by a Sunday.
Now witnessed four times, two independent publishers, four civil
years: the Latin Mass Society Ordo's 2023-2024 and 2024-2025 editions
both read "Pr of the Apostles" on their own unimpeded 25 January
(2024, 2025); extraordinaryform.org's 2024-2025Ordo.pdf and
2026-2027Ordo.pdf independently agree on their own unimpeded years
(2025, 2027, spot-checked, not wired in as a fixture). Every source's
2026 edition agrees 25 January is impeded that year and produces no
data point at all. No source disagreed with the textual reading.
Surveyed every other Apostle/Evangelist-named slug in
data/ef/sanctoral.sexp before concluding the list needed exactly this
one addition: the Dedication of the Basilicas of Sts Peter & Paul (18
November) is confirmed NOT an RG 497 trigger (all three LMS editions
read "Pr of the Dedication of a Church", not "Apostles" -- it is about
the buildings, not the Apostles in person); the Vigil of Sts Peter &
Paul (28 June) is confirmed "Common Pr", corroborating the pre-existing
"no vigil ever reaches this branch" comment.
Blast radius, measured exhaustively (1583-9999, new permanent sweep in
test_rubrics_ef.ml): 7217 domain years have 25 January unimpeded and
observed; all 7217 now read Apostles, zero exceptions.
Claude-Session: https://claude.ai/code/session_017ZBxCCRM2ojnBupp3SBxV9
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Item 2 of Phase 3 (celebrant-rubrics-phase1), the bulk of this phase
and the last EF Mass rubric this project scoped: which preface is
said, deferring to seasonal/proper-title rules for the fourteen named
prefaces, then RG 498's Common residual.
RG 482 gives the resolution chain: the Mass's own proper preface,
failing that the seasonal one, failing that Common. Read literally,
RG 484-497 look like fourteen separate rules, but each numbered
rubric's own propria/de-Tempore pair produces the SAME preface
identity either way, so the whole chain collapses into one priority-
ordered decision: title/mystery triggers (Holy Cross, Sacred Heart,
Christ the King, Trinity, St Joseph, BVM, the Nativity octave, the
Apostles, Epiphany), each independent of season, then six seasonal
windows (Nativity, Epiphany, Lent, Holy Cross/Passiontide, Easter,
Ascension, Holy Spirit, Trinity-for-ordinary-Sundays), then Common.
The "one genuinely unproven piece" the design spec worried about --
per-feast proper prefaces extracted from the Missal's propers at scale
-- turned out not to be a large-scale extraction problem at all: every
one of the fourteen propers is a closed, small, subject/slug-keyed
trigger (mirroring Precedence_ef.band's own RG 91 table), not
thousands of individual saints' pages. The one genuine open question
(RG 488, the Chrism Mass) is N/A: this engine resolves one Mass per
civil day and has no separate Chrism-Mass dimension.
Preface is a new kernel type (lib/kernel/preface.ml[i]), not an
EF-specific one, the same placement as Colour/Subject/Mass_formulary:
Liturgical_day.t is parameterised only over season/rank, so any field
it carries generically must live in the kernel even though only EF
constructs a value of it today. Wired exactly as creed/gloria were
(Rite.t.preface, Calendar.ml, Rite_ef.context), but Preface.t option,
not a bare bool: unlike creed/gloria, a preface is said only at a
Mass, and Good Friday (1955-restored Holy Week) resolves an observed
celebration but has no Mass at all -- None is the honest answer there,
and also the neutral value an unimplemented rite returns.
Two priority-order findings only the oracle settled, not derivable
from the Latin text in isolation, both cross-checked against 358
individually classified entries in the FIUV Ordo's own praef column
(test/fixtures/fiuv-ordo-2025-2026.sexp, already captured, wired up
here as a new comparison axis): RG 484(b)'s own "except Masses with a
proper of the divine mysteries or Persons" is narrower than every
other window's implicit exception (an Apostle inside the Nativity
octave is overridden to Nativity; outside it, keeps his own preface
even inside another window); and RG 495's "et votivis" half is live
for the one office this engine models without a votive-Mass dimension
(the Saturday Office of the BVM), which also proved a vigil is not a
"festum" for this purpose (the Assumption's own vigil takes Common,
not BVM, correcting an initial reuse of Precedence_ef.marian_slugs
that had no reason to make that distinction for its own, different
rubric). A third, RG16(a)-shaped fix landed the same way: RG 494(b)'s
own Trinity grant must read the day's TEMPORAL season, not the
celebration that actually won it, or a Class1 feast with no preference
of its own (All Saints) wrongly falls to Common on a Sunday it merely
commemorates.
colitur rubrics gains a sixth TAB-separated column. Domain-wide
1583-9999 exhaustive sweep confirms every Christmastide day resolves
Nativity/Epiphany/Bvm, every Paschaltide day one of its own three
windows or a season-independent title, every Lent day Lent or a
title, and Passiontide legitimately produces Easter exactly once a
year (the Vigil Mass) -- 8416 of the domain's 8417 years, the one
short year being the domain's own upper boundary (the liturgical year
opening in 9999 cannot construct dates in year 10000, a pre-existing
edge this sweep re-confirms rather than a new one).
day/readings verified byte-identical to the branch's own state before
this phase (commit 9c96e0a) across a 455-year sample spanning the
whole domain -- not literally to the v0.10.1 tag, which 22 earlier
commits on this same branch (Phase 1/2, the bissextile shift, the
Rogation colour fix) had already moved past before this phase began.
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Item 1 of Phase 3 (celebrant-rubrics-phase1): the "at Low Mass"
commemoration-placement rule the design spec recorded as unread. It is
not a new rule -- it is the sung/low axis of RG 111, which colitur
already implements.
RG 111(a) (LT.txt, "Ratio admittendi commemorationes"): a liturgical
day of the first class, AND any non-conventual sung Mass regardless of
the day's own class, admits at most one commemoration, and only if it
is privileged. (b)/(c)/(d), the same rubric's remaining clauses, give
the wider caps colitur's admit already computes -- which is exactly
the LOW MASS answer.
Exposed as Precedence.sung_mass_commemorations, a pure derivation over
the existing Low-Mass admitted list (filter to Privileged, keep the
first), not a new stored field on Liturgical_day.t: the input list is
already validated and privilege-tagged, so a second field would only
create a second place for the same fact to drift out of sync with the
first, with no new information gained. Liturgical_day.t.commemorations
is now documented as the Low Mass set explicitly, removing the
ambiguity its .mli previously left unstated.
Tested against synthetic Low-Mass sets (none/one/two privileged,
already-first, empty) and two real calendar days resolved through the
normal Cal.day pipeline: 2026-08-14 (Vigil of the Assumption, an
ordinary-only commemoration, dropped at Sung Mass) and 2026-04-25 (the
Major Litanies, RG 80/109(f), privileged, kept at both Masses).
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Temporal_ef.temporal's Rogation Monday/Tuesday branch hardcoded
Colour.Violet with no citation (data/ef/expected-divergences-lms.sexp's
L6, surfaced by the LMS Ordo). RG 119 assigns white to the de-Tempore
Office and Mass from the Paschal Vigil Mass to the Pentecost Vigil Mass
exclusive; Easter+36/+37 sit inside that window. RG 128's own exhaustive
four-case violet list never names Rogation days, and its vigil clause
(d) is doubly inapplicable: these are not vigils, and they are inside
Paschaltide, not outside it. RG 88 explains the violet actually seen in
print sources: "de Litaniis minoribus nihil fit in Officio, sed tantum
in Missa" -- the violet belongs to the Rogation Mass/procession, a
distinct votive text this engine does not model, not to the day's own
Office. Witnessed directly: LMS Ordo 2023-2024, 2024-05-06, "FERIA IV Cl
W" with "Gl", the Office and Mass printed separately from the optional
violet votive Mass of the Rogations.
Cascade verified, not assumed: RG 432(b) omits the Gloria on every
violet Mass, so the wrong colour was also silencing the Gloria on these
two weekdays even though RG 237(e) (Breviary, ordinary Paschaltide
ferias say Te Deum) already made it true underneath. White removes the
432(b) block, and the Gloria now follows Te Deum via 431(a), matching
the Ordo's own "Gl" -- confirmed with dedicated golden pins in both
test_golden.ml (colour) and test_rubrics_ef.ml (the Gloria flip),
2028-05-22/23 (neither day impeded that year).
Closed L6 in data/ef/expected-divergences-lms.sexp. Reopened C8 in
data/ef/expected-divergences.sexp (26 of 16801 rows, 2005-2050): lectio
independently computes these two days violet too, so the two engines
used to agree by sharing the same uncited assumption; colitur's colour
is now correct and lectio's is not, so the comparator disagrees again,
for the opposite reason. While reopening C8, found and corrected a
genuine misattribution in its own prior closure note, which claimed
lectio's violet was "RG 128(d)" -- 128(d) governs vigils outside
Paschaltide and has nothing to do with Rogation days. Checked
docs/research/rules-register.md for the same claim: not present there,
but a related conflation was found and corrected at its O'Connell
section 4(d) note, which had used a Rogation MASS/procession citation to
"confirm" the day's own OFFICE colour.
Blast radius measured in-process across the full 1583-9999 domain
(throwaway probe, not committed): 4722 days total (2368 Rogation
Mondays + 2354 Rogation Tuesdays actually observed outright, i.e. not
impeded by a stronger sanctoral feast that year), all Violet->White,
all with the Gloria flipping false->true alongside, zero anomalies.
Mutation-tested: reverting the branch to Colour.Violet reddens 16 tests
across Rubrics_ef, the lectio differential, the LMS Ordo suite and both
golden pin files; restored and reconfirmed green (680 tests).
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Phase 2 of celebrant-rubrics-phase1: colitur rubrics gains a fifth
column, whether the Gloria is said. Follows the Creed's own seam
exactly -- Rite.t.gloria, Liturgical_day.t.gloria, wired through
calendar.ml the same way.
RG 431(a)/432(a) defer the Gloria to the Breviary's own Te Deum rule
(nn. 237-238), so te_deum is implemented as its own named predicate,
cited clause by clause, not collapsed into a colour heuristic. 431(c)
(Holy Thursday, the Easter Vigil Mass) and 432(b)/(d) (violet; a
Requiem) are independent overrides checked ahead of the Te Deum-derived
answer. Every clause this engine has no dimension to model
(votive Mass classes, the wider n.302 "Missa festiva" categories) is
stated as N/A with its own reasoning, not silently dropped.
Validated against the FIUV universal Ordo (Gloria and Te Deum) and all
three LMS editions (Gloria). A first pass over-trusted a clean-looking
15-for-15 FIUV contradiction of 237(b)'s own Septuagesima exception and
replaced it with a blanket "every Sunday" rule; the evidence was itself
corrupted -- the FIUV extractor recognised only one of the source's two
Te Deum negations ("non dicitur", not "sine"), so every "sine Te Deum"
Sunday read wrongly true. Fixed in tools/extract_fiuv_ordo.ml, fixture
re-extracted, and the literal 237(b) reading restored once the
corrected data confirmed it. A second bug surfaced alongside it (Palm/
Passion Sunday wrongly reading true via Temporal_ef.named's own table
membership, then Christ the King wrongly reading false from an
over-broad fix) is closed with an explicit two-slug exclusion.
Domain-wide 1583-9999: every violet or Rose day is gloria=false except
the Easter Vigil (RG 431(c) lex specialis), every Requiem is
gloria=false, both measured exhaustively, zero exceptions. Mutation-
proved: disabling 431(c) reddens 8 tests including all four oracle
comparisons; disabling 238(c)'s feria-I-classis exclusion reddens
exactly the dedicated Ash Wednesday unit test, a genuine blind spot in
both oracle layers, reported rather than hidden.
Two open, cited findings, neither fixed here (out of this task's
"follow creed's exact seam" scope): a privileged Lenten/Passiontide
feria carrying one commemoration reads Gloria=true in the LMS Ordo but
Te-Deum=true/Gloria=false in FIUV -- the two oracles disagree with each
other, not merely with colitur (data/ef/expected-divergences-lms.sexp
L5, expected-divergences-fiuv.sexp F3); and a pre-existing, uncited
Colour.Violet bug on Rogation Monday/Tuesday in Temporal_ef.temporal,
surfaced by this comparison but root-caused as a separate defect (L6).
day/readings verified byte-identical against a build from the branch
tip before this task (v0.10.1's own tag predates an already-landed
bissextile fix that legitimately changed both, so it is not the right
baseline).
671 tests green (dune test); 678 with the exhaustive sweep
(COLITUR_EXHAUSTIVE_SWEEP=1 dune test --force, ~104s).
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colitur said the Creed IS said on All Souls' Day and every other
Requiem-shaped day: RG 475(b)'s "in festis I classis" branch fired on
rank alone, with nothing checking RG 476(f), "Non dicitur symbolum ...
f) in Missis defunctorum". Allow-listed as L1 in
expected-divergences-lms.sexp on the argument that [creed] has no
notion of a Requiem Mass in its inputs and could not express the rule
without a signature change.
That argument does not hold. Colour.Black is used by exactly two
celebrations in the whole engine, verified by grepping every
occurrence in lib/ and data/: commemoration-of-all-souls
(data/ef/sanctoral.sexp) and Good Friday (temporal_ef.ml, already
false via the earlier RG 23(b) feria exclusion and has no Mass at all
in the 1955-restored Holy Week). So on every day this engine can
construct, colour = Black if and only if the Mass is a Requiem -- a
citable implication (RG 117 assigns black to Masses of the dead) on
this data, not a heuristic.
Rite_ef.Rubrics_ef.creed now reads observed.colour as RG 476(f)'s own
guard, positioned ahead of 475(b)'s rank branch. A new test,
test_colour_black_population_is_exactly_two, sweeps both the shipped
data and Temporal_ef's own code across a century and fails loudly the
day a third Colour.Black celebration is ever introduced, so the proxy
cannot silently rot.
L1 is closed in expected-divergences-lms.sexp, citation preserved.
Blast radius, measured (full 1583-9999 sweep, grouped by observed
slug): 8 416 days change from true to false, every one
commemoration-of-all-souls (missing from exactly 1 of the 8 417 domain
years, a boundary-year transfer effect at 1583/9999). A further 8 416
Colour.Black days are Good Friday, unaffected (already false before
this fix). colitur day/readings stay byte-identical to v0.10.1
(checked directly against a v0.10.1 worktree build, 9 domain-spanning
years); colitur rubrics changes on exactly the 8 416 days above.
colitur emit --format sexp's pretty-printed line count for 2027 moved
9010 -> 9011 as a side effect: Sexplib.Sexp.to_string_hum wraps by
column width, and All Souls' Day 2027's record grew one wrapped line
because "false" is one character longer than "true". Cosmetic only --
no field's data changed -- and pinned in test/cli.t with the
measurement recorded.
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rubrics_ef.ml's Creed check excluded feriae from 475(b)/(c)/(e) via an
explicit test for feria I classis (Ash Wednesday, Holy Week) and vigils
only. RG 24/25's feriae II and III classis (Advent 17-23 December, the
Advent/Lent/September Ember sets, the numbered Lenten/Passiontide
ferias) were excluded by no check at all, correct today only because of
an unstated Temporal_ef property (no ferial-origin office it builds
carries subject Lord/Bvm or an apostle-list slug). A comment read as if
this were established "by construction of the two exclusions
immediately above", which overclaimed: those two exclusions cover feria
I classis only.
Corrected the comments to name RG 24/25 explicitly, state what is and
is not checked, and cite where the real guarantee comes from. Added a
test that sweeps Temporal_ef.temporal across a century (1583-1682),
asserting the invariant directly against every ferial-origin day found,
with its own coverage counters confirming the span actually reaches
Advent 17-23, all three non-Whitsun Ember sets, and Lenten/Passiontide
ferias. The first run of the test found a real gap in its own
population filter (RG 17(a)'s 2 January Holy Name fallback, a genuine
feast sitting outside Temporal_ef.named for an architectural reason),
fixed by naming that date explicitly rather than narrowing the span.
Proved the test has teeth by mutation: forcing the ferial builder's
default subject to Lord reddened it (and 24 other tests, expected
collateral from an intentionally broad mutation) before being reverted.
No production logic changed -- only comments in rubrics_ef.ml. day,
readings and rubrics output confirmed byte-identical against the
pre-fix binary for four spot years across the domain. Also corrects a
stale test-case count in a prior task report (18 in the array, not the
19 recorded there); the array now genuinely holds 19.
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Whether the Creed is said at Mass. New Rubrics_ef.creed, reached through
a new Rite.t.creed field and a new Liturgical_day.t.creed bool (false,
not an option, for a rite that has not implemented the rule); colitur
rubrics gains a fourth TAB-separated column.
475(a) reads the TEMPORAL cycle's own weekday, not the observed day: a
Sunday impeded by a Feast of the Lord (RG 16a) still says the Creed.
475(d)'s three octaves (Nativity, Easter, Pentecost) are pure date/
Easter-offset windows, checked first, since a saint's feast winning the
day inside one of them still says the Creed ("etiam in festis
occurrentibus") -- St Stephen, 26 December, is the live witness.
RG 23 classifies Ash Wednesday and every feria of Holy Week (including
the Sacred Triduum) as feriae, not festa, however high their rank, so
475(b)/(c)'s "in festis" never reaches them; this single check subsumes
476(a)'s own naming of the Chrism/Lord's-Supper Mass and the Easter
Vigil. RG 28-34 vigils are a third liturgical-day category, also
excluded from "in festis" regardless of rank -- reuses the already-
exported Precedence_ef.is_vigil rather than a new list.
475(e)'s Apostle/Evangelist natalicia list (creed_apostle_slugs) was
derived by grepping data/ef/sanctoral.sexp directly and checking each
candidate's own date against whether it is that saint's dies natalis --
not copied from any list supplied with the task. The Conversion of St
Paul and the 30 June Commemoration of St Paul are excluded (neither is
a natalicium); the Chair of St Peter and St Barnabas are included only
because the clause names them explicitly, which is exactly why it has
to: neither is a natalicium either.
475(c)'s BVM half reuses Precedence_ef.marian_slugs (newly exported)
rather than the subject field alone: checked against the shipped data,
almost every Marian sanctoral entry ships subject=Saint, not Bvm.
man/colitur.1's rubrics section is updated to match the new column;
test/cli.t repinned via dune promote for the same reason. Verified
day/readings output byte-identical to v0.10.1 across the whole
1583-9999 domain (both binaries' concatenated day+readings output,
6,148,492 lines each, zero diff). Domain-wide: 882,996 days say the
Creed, 2,191,250 do not; every one of the domain's 439,178 Sundays says
it, zero exceptions.
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