deterministic OCaml engine to compute and validate liturgical calendars for multiple rites, template-driven output to year 9999 https://git.labunix.xyz/colitur.git/atom?h=v0.6.0 2026-08-18T10:11:05Z 2026-08-18T10:11:05Z Lukasz Kasprzak lukas@labunix.xyz 2026-08-18T10:11:05Z urn:sha1:a6daed7820a97f4032f21964b5b1bb30fe00b36b Both carried rank Class3 with status Commemoration_only, bootstrapped from lectio, which inherits it from missalemeum, which is generated from Divinum Officium. The Missal's own universal calendarium ranks both "III classis" outright, with no commemoration rubric: "S. Ubaldi Ep. et Conf., III classis" (16 May) and "S. Didaci Conf., III classis" (13 November), corroborated in the second scan and in a published 1962 Ordo. Universal by construction, not by assumption: the calendarium carries no "pro aliquibus locis" marker in its 573 lines while the wider Missal carries 79 of them elsewhere. Each saint also has his own Mass entry in the Proprium, which a bare commemoration never has -- a commemoration carries an oration only. Found by auditing ALL 290 fixed-date entries against that calendarium, day by day, anchored on the Roman calends column because the arabic day column is OCR-wrecked and the dominical-letter column vanishes in some months. These two were the only status defects in the whole file. The 15 days the automated pass could not cover were read by hand and all agree. Neither needed a proper authored: each takes its Mass from a Common with only its own Oratio proper, per its own rubric at its own date. ubaldus shares patrick's Common exactly. didacus needed one newly transcribed -- common-of-a-confessor-not-a-bishop-2, the "Altera Missa" Iustus, 1 Cor 4:9-14 and Luke 12:32-34, read independently in both scans, which agree, so the page-image third reading this file's method requires on disagreement was not triggered. Blast radius, full 1583-9999 sweep, every day classified: 13 036. That is 5 564 ubaldus observed, 7 196 didacus observed, and 276 where the Ascension Vigil still wins on 16 May but its single RG 111(c) slot passes from rogation-wednesday to ubaldus -- correct and already pinned, since the Rogation days are the MINOR Litanies and so an ordinary commemoration, which RG 113's table order ranks below a III-class feast. Cited as C38 (70 rows) and M30 (3); C8, C17 and M18 shrink accordingly, each with the reason recorded rather than the count silently adjusted. 2026-08-18T09:36:33Z Lukasz Kasprzak lukas@labunix.xyz 2026-08-18T09:36:33Z urn:sha1:0281a846ac7c22d22990a6664a37205930a94b7d RG 128, transcribed in the rules register since 2026-08-11, gives violet to "vigils of II and III class outside Paschaltide". The Vigil of the Assumption (14 August, II class) carried White and the Vigil of St Lawrence (9 August, III class) carried Red. Both are outside Paschaltide, so both are violet. The Ascension's vigil is untouched: it is the one II-class vigil inside Paschaltide and was already correctly white. The rule had been sitting in the register, disagreeing with the shipped data, since before the data was bootstrapped. It was invisible because colitur, lectio and missalemeum all carried the same two wrong colours -- colitur was bootstrapped from lectio, lectio's ini is generated from missalemeum, and missalemeum uses Divinum Officium's data files. Three sources agreeing is one source counted three times, and the differential and the oracle both went green on the shared error. It surfaced only against witnesses outside that tree: a published 1962 Ordo flagged the Assumption's, and O'Connell, The Celebration of Mass 4th ed. (1964), section 4(c) and footnote 169, gave the general rule and with it St Lawrence's, which the Ordo omits entirely. Two golden pins added, in years where each vigil is actually observed rather than impeded. The divergence this creates against every DO-lineage source is cited in both allow-lists: C37 (lectio, 77 rows -- 92 possible minus 15 where the vigil falls on a Sunday) and M29 (missalemeum, 3 rows in 2026-2027 and 2 in each of 2035 and 2038). Both gated on the exact slugs or dates and on colour alone, so any other divergence on those days would still surface. Also recorded, no code change: rose on Gaudete and Laetare stays. RG 131 is permissive ("adhiberi possunt") and the Ordo prints violet, so the colour field carries a permission rather than a requirement on those two Sundays a year -- a decided position now, not an unexamined one. 2026-08-18T09:26:04Z Lukasz Kasprzak lukas@labunix.xyz 2026-08-18T09:26:04Z urn:sha1:01219763c87c84175fcfa469882c6f30a56720d5 RG 128(b)'s own exception list, transcribed in the rules register and primary-source-verified since Task 16, excepts "Actione liturgica feria VI in Passione et Morte Domini usque ad Communionem exclusive" from the violet that otherwise runs from Septuagesima to the Easter Vigil. RG 132 assigns black there. The register recorded this as an acknowledged gap rather than a disputed reading -- the code comment beside the Holy Thursday exception says so in as many words -- and it is closed here. Found by two witnesses outside the Divinum Officium lineage that colitur, lectio and missalemeum all share: O'Connell, The Celebration of Mass, 4th ed. (1964), revised throughout to the Codex Rubricarum (1960) and the 1962 Missal, and a published 1962 Ordo. Both say black. So does missalemeum's own colour set, which orders the day "bv". The rubric is per-action ("usque ad Communionem exclusive") and the model emits one colour per day; black is the day's principal one, the same acknowledged limit RG 126's Palm Sunday blessing already carries. Blast radius: one day per year, colour only, across the whole 1583-9999 domain. Two golden pins re-pinned. Good Friday's 46 differential rows leave C23 for a new C36 gated on the exact triple [First_f; Gospel_f; Colour_f], so C23's own exact-pair gate still means what its note says for its remaining four days: 184 + 46 = 230, no residue, both counts from the comparator rather than hand-counted. 2026-08-17T19:45:47Z Lukasz Kasprzak lukas@labunix.xyz 2026-08-17T19:45:47Z urn:sha1:cffb879fa124c22acd400f59152a57d20cec036f RG 78's office has been built since ef-bvm-saturday: an otherwise unoccupied IV-class Saturday is de sancta Maria in sabbato, white, IV class. The Mass stayed the feria's, so the day observed Our Lady and then read Colossians on the parable of the weeds. That is M26 shape 1. RG 309(a) is the rule -- the Masses the Missal assigns "iuxta temporum diversitatem" -- and it prints five, each under its own season heading. All ten citations are transcribed from the scans with line numbers in the source. Masses II-V were confirmed twice, against the scan and against a live missalemeum capture of 2038 which names them and agrees on both readings. Mass I rests on the scan alone: no oracle year to hand has an Advent Saturday carrying this office. One witness where the others have two, and the code says so rather than blurring it. The mapping looked like the hard part and dissolved. The Missal's ranges are cut by civil dates and movable feasts, not by this rite's seasons -- II ends mid-season at the Purification, III spans four seasons. But measured against what a IV-class Saturday can actually be, it reduces to a seasonal mapping plus one date test at 2/3 February, with no Easter arithmetic at all: III's end to IV's start leaves the Triduum unassigned, unreachable because Holy Saturday is I class; IV's end to V's start leaves Pentecost week unassigned, also unreachable because that week's Saturday is an Ember Saturday. Time after Pentecost then begins exactly at Trinity, exactly where Mass V begins. Both gaps verified by sweep -- zero IV-class Saturdays in either across 2000-2059 -- not inferred. The office is identified structurally, never off the slug, which it deliberately shares with the ordinary feria: subject Bvm, IV class, Saturday. Blast radius: 87611 reading rows over the full domain, every one a Saturday. Allow-lists: M26 27 to 6, shape 1 gone, leaving only the Christ-the-King residue argued in colitur's favour last commit. The 2038 suite's BVM-SATURDAY-MASS class is removed rather than zeroed -- an id with no rows must not be declared. M18 355 to 376. C17 widened 397 to 445, taking its own Saturdays back from C1, C19 and C25, since one cause should not be filed under two ids; C31 89 to 103; C25 closed at 0 rows, its Holy-Name-week Saturdays now answered before step 3 is reached. Three unit tests pinned the old behaviour and are corrected rather than re-pinned: two asserted the day "keeps its ferial Mass", which was the honest thing to assert while this was unimplemented. The third still tests what it always did -- that step 4 refuses a temporal office -- and only what answers instead has changed. Register: section 6.13. 2026-08-17T19:12:35Z Lukasz Kasprzak lukas@labunix.xyz 2026-08-17T19:12:35Z urn:sha1:dcce3a5936c2232aaabbb2e8552be24ea7decdbf RG 299 located (scan1:1096-1098), which does two things at once. First it closes a standing gap: the ferial-Mass selection rule was recorded in the register as unconfirmed against the primary source, and step 3 said so in its own comment -- "lectio's own observed behaviour, not a confirmed Missal citation". It is confirmed now. "In reliquis feriis dicitur Missa dominicae praecedentis, nisi a rubricis aliter provisum sit", restated in the propers as "...nisi propria Missa assignetur". Second, that escape clause splits M26 shape 2 in half, which is why the shape was never resolvable as one thing. Shape 2(a), the week after Trinity, is fixed. Trinity is the temporal identity of its own Sunday, so a plain walkback lands on Trinity's Mass -- but the Missal prints a named formula for the following week, "Missa dominicae I post Pentecosten" (scan1:21758), precisely because the feast has taken that Sunday's own. Those ferias now resolve at step 2 from it and never reach the walkback. Shape 2(b), Christ the King's week, turns out not to be a bug at all. No proper Mass is assigned there -- checked directly, no rubric precedes that Mass heading (scan1:39163ff) -- so RG 299's default governs and "the Mass of the preceding Sunday" genuinely is Christ the King's own, which is what colitur emits and missalemeum does not. Kept open only because no rubric specific to that week was located either way; the verdict is now argued from the primary text rather than resting on oracle disagreement. No Thursday in the slug list: Corpus Christi is Easter+60, which IS that week's Thursday every year, so the ferial slug never exists. Found by the bootstrap's own reachability guard refusing to emit a key no Temporal_ef slug can match, not reasoned out in advance. Allow-lists: C35 opened (69 rows, verdict colitur -- lectio still walks back); C17 narrowed 406 to 397, nine Saturdays moving to C35 because they carry both a citation and a colour difference, with C35 gated to require the citation so a colour-only Saturday still falls to C17; M26 narrowed 30 to 27; M18 widened 352 to 355, the same three days keeping only their observed-identity difference. Register: section 6.11. 2026-08-17T12:26:42Z Lukasz Kasprzak lukas@labunix.xyz 2026-08-17T12:26:42Z urn:sha1:1915f3bb9d74998a411bd55ae658cb3f58fd3477 Comment and citation corrections found by review, plus one finding that survived an attempt to reconstruct it. No behaviour change; the suite is unchanged at 358 green. The ferial rubric "Diebus ferialibus a 2 ad 5 ianuarii Missa dicitur ut die 1 ianuarii" was attributed to RG 17(a) in three test comments. It is not RG 17(a). RG 17(a) (LT.txt:843) fixes only WHEN the Holy Name is kept -- "celebrandum dominica quae occurrit a die 2 ad 5 ianuarii; secus die 2 ianuarii". The rubric quoted is a Mass-propers rubric printed under the Sanctissimi Nominis Iesu heading (scan1:6523-6526, corroborated scan2:7216), governing what the ordinary ferias of that window say when they are not the feast at all. Two rules sharing a date window. Fix round 1 had already corrected this on the data side; the generator's own comment was right throughout. Only the test comments were stale. test_differential.ml named bootstrap_lectionary.ml's derived_entries as the source of ef-holy-name's citations. That binding no longer exists -- it was the mechanism that derived them from ef-holy-name-sunday's wrongly-widened ini translation, removed in Task 9 because the derivation was itself the error. They are hand-authored from the scans now, as holy_name_entries. M26's shape 1 described its 21 rows as votive Masses of the BVM "on an otherwise-unoccupied feria, not only a Saturday", splitting them into 4 BVM-Saturday rows and 17 "ordinary weekday ferias". Every one of the 21 is a Saturday, each checked individually against date -d. The error was not merely verbal: it made the gap look broader than a single cause and pointed away from the one rule that explains all 21. The sub-groups differ by season, not weekday, and only in what colitur shows in the votive Mass's place. One gap -- the office is built (RG 91 entry 27), the seasonal selection among the five Masses is not. Recorded, not fixed: step 4 of the reading chain has no oracle witness at all. This began as a note to write up a live-oracle confirmation for Felicitas and Perpetua; the reconstruction contradicted its premise. The sweep ran over 2028, where 6 March resolves as a Lenten feria with the saint admitted only as a commemoration, so her own Mass is never read that year. The finding underneath is firmer: only five saints route through a Common, they are the observed office on five days in all of 2005-2050 (isidore-of-seville 2008/2035/2046, frances-rome and sts-felicitas-perpetua both 2038), two are never observed in 46 years, and none falls in layer 4's window. Layer 3 does not cover it either -- lectio resolves the literal "-"/"-" sentinel there, which is what C18 is gated on, so it confirms only that colitur emits a citation where lectio emits none, never that it is right. Closing it needs the oracle fixture extended to 2035, 2038 or 2046; that is a fixture-scope decision. Register: sections 6.6 and 6.7. CLAUDE.md's layer-blindness list gains the step-4 entry. 2026-08-17T12:13:02Z Lukasz Kasprzak lukas@labunix.xyz 2026-08-17T12:13:02Z urn:sha1:3565ebd1608a7d87e0d890f9953845efcfe743ca A live-missalemeum sweep over a full liturgical year (2028, 364 days) returned 333 matching and 31 differing days: 17 already-known or pure notation, 3 new. All three now adjudicated against the photographic scans of the 1962 Missal. The Assumption's Epistle reads "Iudith 13, 22-25; 15, 10" (scan1:35357). Both engines carried "Judith 13:22-25; 13:15; 13:10" -- a chapter carry-over defect that re-applied chapter 13 to the second citation and so invented two verses the Missal never cites. The Seven Sorrows reads "Iudith 13, 22 et 23-25" (scan1:36938, corroborated at 28468); both carried "Judith 13:22; 13:25", dropping the range. The third, St Monica, resolves the other way: the Missal gives 1 Timothy (scan2:32679, heading and incipit both legible; scan1:29524 agrees) where missalemeum serves the Common of Holy Women's Proverbs -- colitur is right, no change. Layer 3 could not have found either citation defect. colitur's data is bootstrapped from lectio, and lectio is the other side of that differential, so while both engines produced the identical wrong answer the comparison held it against itself and reported agreement -- the shared-lineage blindness CLAUDE.md names, now with a second live witness beside Holy Thursday's colour. Only an external oracle could see it, and only outside the committed fixture's own window. Fixed upstream in lectio, re-bootstrapped here (provenance SHA-256 moved to 54f6bfc5, verified against the source), fixture regenerated. The upstream fix inverted layer 3 from blind to load-bearing here: reverting the Assumption citation now reddens both layers, where before it would have reddened neither. Verified by mutation, both directions. Allow-lists: - C22 closed and removed (128 rows -> 0), not re-adjudicated -- the other engine was fixed to agree, the same shape as the C2-C5/C7/C9-C13/C21 closures. Its own note had already flagged the Lenten Ember dead-key bug for upstream; lectio now also fails its build on any unreachable lectionary key rather than serving a plausible wrong Mass. - M28 opened (3 rows, verdict colitur), pinning both sides' citation text rather than the date and diff shape alone, so a different divergence landing on the same date cannot be swallowed. - M8's gate widened, expected_rows unchanged at 2: 2027-08-15 carries both its cause and M28's, and one entry is admitted per day. It stays under M8, which now requires its own commemoration difference to be present and admits the citation difference only when it satisfies M28's two-sided predicate. Neither cause absorbs the other. layer_m_reason's oracle-row parameter, kept named since M2 closed for exactly such a future reader, is live again. Register: docs/research/rules-register.md section 6.6. 2026-08-17T10:28:03Z Lukasz Kasprzak lukas@labunix.xyz 2026-08-17T10:28:03Z urn:sha1:8d1eb25a311e16ddb7bf89d2b21fb1ca0aa058a7 Layer 4 (test_oracle.ml) now extracts and compares the Epistle/Gospel citation for every one of the 730 days in the 2026-2027 fixture, the same axis Task 8 already added to layer 3. tools/ extract_missalemeum_oracle.py gained a structural citation-span detector (the first "*...*"-wrapped span under 40 chars containing a chapter:verse-shaped digit pair), verified exhaustively over all 1 458 Lectio/Evangelium sections. 728 of 730 days are comparable; the 2 that are not (Good Friday, both years) have no such section in missalemeum's own JSON at all -- a structural limit on the oracle's own side (M23), not a colitur gap. 451 of 730 days differ and are all explained across 19 cited entries; 0 unexplained. Chain step 4 (the Commons) has no layer-4 witness: confirmed empirically (a scratch sweep, not merely re-asserted from Task 6's own report) that none of the 15 Commons/proper saints is ever the observed office in this window. The comparison surfaced three genuine colitur bugs in data/ef/lectionary.sexp, all fixed at the source in tools/bootstrap_lectionary.ml: 1. Holy Name of Jesus (ef-holy-name-sunday/ef-holy-name) carried a mis-derived citation, borrowed by analogy from an unrelated ini section ("ef-christmas-sunday-0", the Sunday-within-the-Octave's own Mass) on the wrong assumption the two share a Mass. Disproved by missalemeum's own extraction for both real Holy Name Sundays in its window, confirmed against the Missal itself, twice, both scans (Acts 4:8-12/Luke 2:21, not Gal 4:1-7/Luke 2:33-40). 2. RG 17(a)'s own "diebus ferialibus" rubric (immediately following the Holy Name heading, both scans) was never implemented: 2-5 January ferias repeat 1 January's Mass, 7-12 January ferias before Holy Family Sunday repeat Epiphany's, and Holy Family's own week has a named formula ("Missa Dominicae Primae post Epiphaniam"). All three fell to step 3's undifferentiated Sunday walkback instead. Fixed for three 5-weekday families, deliberately excluding Saturday from all three -- RG 78's BVM Saturday Office wins there unconditionally, confirmed against missalemeum's own title on this window's own such Saturdays. 3. Corpus Christi and Sacred Heart (both real, never-impeded I-class movable feasts) had no lectionary entry at all. Both engines independently fell back to Trinity Sunday's own citation and silently agreed on the wrong answer -- the "Holy Thursday violet in both" shape CLAUDE.md names for exactly this reason. Because lectionary.sexp is shared with layer 3 (the lectio differential, 2005-2050), these fixes changed colitur's output for the whole domain, not only 2026-2027. data/ef/expected-divergences.sexp and test_differential.ml needed matching updates: C1 narrowed 361->173 and C25 narrowed 57->13 (rows that now resolve correctly moved to new entries), C16's note corrected (count unchanged), and six new entries added (C29-C34, 397 rows total, all verdict colitur). test_lectionary.ml and test_lectionary_ef.ml's own pins were updated to match (entry count 131->148; one step-3 regression test re-pointed to a date that still genuinely exercises that step). One entry, M26 (30 rows, verdict open), is a genuine unfixed gap: colitur's step-3 "resume the preceding Sunday" fallback is its only ferial-Mass mechanism, and missalemeum's own selection is more granular in three confirmed ways (a rotating votive Mass of the BVM, a named weekly formula for at least one week, and later Time-after-Pentecost weeks this task's own investigation did not narrow to a single rule) -- the same "needs a season-keyed selection mechanism, new behaviour not new data" shape data/ef/expected-divergences.sexp's own C6/C25 and Task 6's own residual concern already name, out of this task's own scope to build. dune test: 358 tests green. COLITUR_EXHAUSTIVE_SWEEP=1 dune test --force: 359 tests green, 89.5s. 2026-08-15T02:48:59Z Lukasz Kasprzak lukas@labunix.xyz 2026-08-15T02:48:59Z urn:sha1:9947a28f3a40bd8ac36892dcf5aad59d9e6f847c Two Ember Saturdays shipped an apostle's Mass verbatim from lectio's own ini, the exact shape already found and fixed for Passion Tuesday (C26): ef-advent-ember-sat carried St Thomas the Apostle's Mass (Eph 2:19-22 / John 20:24-29, 21 December) instead of the real "Sabbato Quatuor Temporum Adventus" (2 Thess 2:1-8 / Luke 3:1-6); ef-september- ember-sat carried St Matthew's Mass (Ezek 1:10-14 / Matt 9:9-13, 21 September) instead of the real "Sabbato Quatuor Temporum septembris" (Heb 9:2-12 / Luke 13:6-17). Both verified against both primary-source scans independently. Both readings are explicitly labelled "Lectio Epistolae" in the Missal on both days, so neither needed the "last lesson before the Gospel" convention Holy Wednesday/Good Friday relied on -- a textual fact, not an editorial choice. Fixed at the source in tools/bootstrap_lectionary.ml: colitur_keys excludes both wrong ini sections; a new ember_saturday_corrections list hand-authors the real citations. New allow-list entries C27/C28 (40 rows each, not the naive 46 -- traced to the identical 6 civil years where 21 September and 21 December, always exactly 91 days apart, land on a Saturday and the fixed saint's feast wins outright). Both values pinned in test_lectionary.ml and mutation-tested. Also: C25's per-weekday breakdown was mislabelled (right multiset, rotated weekday labels) in both test_differential.ml and expected- divergences.sexp -- corrected to Wednesday 6/Thursday 19/Friday 19/Saturday 13, and the claim that this split came directly from the comparator's own output is narrowed to what's actually true (only the total, 57, does). C26's scan2 citation range was extended to include the Gospel (previously stopped after the Epistle). lib/kernel/liturgical_day.mli's "citations always empty until Plan 4" comment is now stale on this branch -- left untouched (Task 11's own documentation pass), noted in the task report so it isn't lost. dune test: 358 tests green; COLITUR_EXHAUSTIVE_SWEEP=1: 359 green. 2026-08-15T02:16:24Z Lukasz Kasprzak lukas@labunix.xyz 2026-08-15T02:16:24Z urn:sha1:96bf100a4de32bd5f3887ffdb15b59b8bbd0376b Critical, and worse than what it replaced: removing a lectionary key does not mean "no reading" to Lectionary_ef.readings -- it means step 3 silently resumes the preceding Sunday. Good Friday, which has no Mass at all, was emitting Palm Sunday's own Epistle and Passion narrative every year; Holy Wednesday had the same defect. Fixed by authoring both days fully: the Gospel was always unambiguous and is now always authored; the Epistle uses the same "last lesson before the Gospel" convention this file's own Lenten Ember Wednesday entry already established for an identical two-peer-lesson shape, applied for consistency rather than invented to close this gap. C24 is retired, folded into a widened C23 covering all six Holy Week days. Important: Passion Tuesday was shipping Holy Tuesday's Mass, a defect the previous round's own footnote had found and left unrecorded. Fixed at the source -- colitur_keys now excludes lectio's own (wrong) ini section for this one weekday rather than translating it; a new passion_tuesday_entry hand-authors the real Missal citation (Dan 14:27, 28-42 / John 7:1-13, both scans). New entry C26 records the resulting divergence, 43 of 46 years, traced (not merely counted) to three years where a competing I-class feast impedes the day entirely. Important: the allow-list header was stale one level up, still naming and restating the diagnosis of an id (C21) retired in the previous round. Rewritten in full rather than layered with another correction. Minors: all three Lent Ember values now pinned (only Wednesday was before); C22's citation corrected to attribute the date-anchor text and the rank text to their own separate sources; assert_reachable's own comment no longer overclaims what it can catch; C25's falsified reasoning replaced with the directly observed fact (a first replacement derivation was itself found wrong on a second reading and is recorded as rejected, not silently discarded); hand-authored citations standardised to English book names with a colon, matching this file's own dominant convention, with one stated exception where a value must stay byte-identical to lectio's own data rather than be reformatted. dune test: 358/358. COLITUR_EXHAUSTIVE_SWEEP=1 dune test --force: 359/359.