diff --git a/src/data/calendar/saints/assumption.yml b/src/data/calendar/saints/assumption.yml
index 3d1ed2d..31cdb6d 100644
--- a/src/data/calendar/saints/assumption.yml
+++ b/src/data/calendar/saints/assumption.yml
@@ -1,7 +1,11 @@
 # Verified against Divinum Officium (web/www/horas/Latin/Sancti/08-15.txt,
-# untagged/default [Rank] block).
+# untagged/default [Rank] block). Propers backfilled during the August
+# pull (live kalendar/prayTertia check, 2025-08-15) now that the
+# collect-pulling methodology exists -- own proper collect. Its own
+# [Ant 1] is itself a cross-reference (@Sancti/08-15t, a Tridentine-
+# specific block) rather than plain text, so left unpulled this pass.
 id: assumption
 name: "The Assumption of the Blessed Virgin Mary"
 rank: duplex-1-classis
 common: common-of-the-bvm
-propers: null
+propers: "assumption"
diff --git a/src/data/calendar/saints/decollation-of-st-john-baptist.yml b/src/data/calendar/saints/decollation-of-st-john-baptist.yml
new file mode 100644
index 0000000..e51523c
--- /dev/null
+++ b/src/data/calendar/saints/decollation-of-st-john-baptist.yml
@@ -0,0 +1,13 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check (2025-08-29) -- winner outright, Duplex, over the stub
+# St. Sabina (see st-sabina.yml). About St. John the Baptist's beheading,
+# not a feast of the Lord/BVM, so kept in scope like his Nativity in June.
+# "common-of-an-apostle" is a loose fit (he isn't one) but the closest
+# existing category to "a major male saint honored with his own high
+# feast" -- same judgment call as nativity-of-st-john-the-baptist.yml.
+# Own proper collect and antiphon.
+id: decollation-of-st-john-baptist
+name: "The Beheading of St. John the Baptist"
+rank: duplex
+common: common-of-an-apostle
+propers: "decollation-of-st-john-baptist"
diff --git a/src/data/calendar/saints/finding-of-st-stephen.yml b/src/data/calendar/saints/finding-of-st-stephen.yml
new file mode 100644
index 0000000..1b39e2b
--- /dev/null
+++ b/src/data/calendar/saints/finding-of-st-stephen.yml
@@ -0,0 +1,18 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check (2026-08-03, a clean weekday). In the real engine, Aug 3
+# falling on a Sunday transfers this forward to Aug 7 (see st-donatus.yml)
+# -- this app's transfer machinery doesn't chase that multi-day skip
+# search, so in this app that Sunday simply displaces this feast entirely
+# for that year (same "not delivered rather than guessed at" stance as
+# other unmodeled transfer chains) rather than landing it on Aug 7. About
+# St. Stephen the Protomartyr's relics, not a feast of the Lord/BVM, so
+# kept in scope like the Conversion of St. Paul. Own collect: a deliberate
+# cross-reference to St. Stephen's own Dec 26 feast (@Sancti/12-26) with
+# one word substituted ("natalícia" -> "Inventiónem") -- the reference
+# engine expands this to full text automatically. Its [Ant 1] is the same
+# Dec 26 antiphon reused verbatim, no substitution this time.
+id: finding-of-st-stephen
+name: "The Finding of St. Stephen, Protomartyr"
+rank: semiduplex
+common: common-of-a-martyr
+propers: "finding-of-st-stephen"
diff --git a/src/data/calendar/saints/ss-cyriacus-largus-and-smaragdus.yml b/src/data/calendar/saints/ss-cyriacus-largus-and-smaragdus.yml
new file mode 100644
index 0000000..2c64a17
--- /dev/null
+++ b/src/data/calendar/saints/ss-cyriacus-largus-and-smaragdus.yml
@@ -0,0 +1,8 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check (2025-08-08) -- winner outright, Semiduplex, alone. Own
+# proper collect, no unique antiphon of their own.
+id: ss-cyriacus-largus-and-smaragdus
+name: "Ss. Cyriacus, Largus, and Smaragdus, Martyrs"
+rank: semiduplex
+common: common-of-several-martyrs
+propers: "ss-cyriacus-largus-and-smaragdus"
diff --git a/src/data/calendar/saints/ss-felix-and-adauctus.yml b/src/data/calendar/saints/ss-felix-and-adauctus.yml
new file mode 100644
index 0000000..7ecf73e
--- /dev/null
+++ b/src/data/calendar/saints/ss-felix-and-adauctus.yml
@@ -0,0 +1,16 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check on a clean weekday (2027-08-30, a Monday) -- wins outright
+# at Simplex. On a Saturday this date is instead outranked by the generic
+# "Sanctae Mariae Sabbato" votive (confirmed re-checking 2025-08-30, a
+# Saturday, where the votive won instead) -- an artifact of the tested
+# weekday, same pattern as St. Stephen I (Aug 2) this month and Ss.
+# Marcellinus/Peter/Erasmus in June. No unique collect: the raw file at
+# this MM-DD slot (Sancti/08-30.txt) is actually St. Rose of Lima's (a
+# much later, 17th-century addition to this filename slot) -- a live
+# prayTertia query for the Monastic 1617 track returns no Oratio at all,
+# confirming propers: null is correct.
+id: ss-felix-and-adauctus
+name: "Ss. Felix and Adauctus, Martyrs"
+rank: simplex
+common: common-of-several-martyrs
+propers: null
diff --git a/src/data/calendar/saints/ss-machabees.yml b/src/data/calendar/saints/ss-machabees.yml
new file mode 100644
index 0000000..e78a4d0
--- /dev/null
+++ b/src/data/calendar/saints/ss-machabees.yml
@@ -0,0 +1,9 @@
+# Genuinely unwinnable stub (verified 2026-08-01, 2029-08-01) -- always
+# commemorated under St. Peter's Chains (see st-peter-ad-vincula.yml),
+# never wins outright; both are fixed, non-movable dates, so this isn't
+# an artifact of the tested year. rank/propers unverified placeholders.
+id: ss-machabees
+name: "Ss. Machabees, Martyrs"
+rank: simplex
+common: common-of-several-martyrs
+propers: null
diff --git a/src/data/calendar/saints/st-augustine.yml b/src/data/calendar/saints/st-augustine.yml
index d0752f9..ce5166a 100644
--- a/src/data/calendar/saints/st-augustine.yml
+++ b/src/data/calendar/saints/st-augustine.yml
@@ -2,8 +2,12 @@
 # untagged/default [Rank] block — that file's own "(sed rubrica 1930)"
 # alternate raises this to Duplex majus, but 1930 postdates the pre-1910
 # calendar this app targets, so the plain default is used instead.
+# Propers backfilled during the August pull (live kalendar/prayTertia
+# check, 2025-08-28) now that the collect-pulling methodology exists --
+# own proper collect, no unique antiphon of his own; wins outright over
+# the stub St. Hermes (see st-hermes.yml).
 id: st-augustine
 name: "St. Augustine of Hippo, Bishop, Confessor and Doctor of the Church"
 rank: duplex
 common: common-of-a-confessor-bishop
-propers: null
+propers: "st-augustine"
diff --git a/src/data/calendar/saints/st-bartholomew.yml b/src/data/calendar/saints/st-bartholomew.yml
new file mode 100644
index 0000000..91b037d
--- /dev/null
+++ b/src/data/calendar/saints/st-bartholomew.yml
@@ -0,0 +1,8 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check (2026-08-24) -- winner outright, Duplex II. classis,
+# alone. Own proper collect, no unique antiphon of his own.
+id: st-bartholomew
+name: "St. Bartholomew, Apostle"
+rank: duplex-2-classis
+common: common-of-an-apostle
+propers: "st-bartholomew"
diff --git a/src/data/calendar/saints/st-bernard.yml b/src/data/calendar/saints/st-bernard.yml
new file mode 100644
index 0000000..cafb9a6
--- /dev/null
+++ b/src/data/calendar/saints/st-bernard.yml
@@ -0,0 +1,10 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check (2025-08-20) -- winner outright, Duplex, over the sixth
+# day of the Assumption's octave (a fixed BVM feast, out of scope, see
+# the sanctoral-calendar.yml comment on this month's octave exclusions).
+# Own proper collect, no unique antiphon of his own.
+id: st-bernard
+name: "St. Bernard, Abbot and Doctor of the Church"
+rank: duplex
+common: common-of-an-abbot
+propers: "st-bernard"
diff --git a/src/data/calendar/saints/st-dominic.yml b/src/data/calendar/saints/st-dominic.yml
new file mode 100644
index 0000000..0087611
--- /dev/null
+++ b/src/data/calendar/saints/st-dominic.yml
@@ -0,0 +1,9 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check (2025-08-04) -- winner outright, Duplex, alone (secondary
+# block is a plain feria, not another saint). Own proper collect, no
+# unique antiphon of his own.
+id: st-dominic
+name: "St. Dominic, Confessor"
+rank: duplex
+common: common-of-a-confessor-not-bishop
+propers: "st-dominic"
diff --git a/src/data/calendar/saints/st-donatus.yml b/src/data/calendar/saints/st-donatus.yml
new file mode 100644
index 0000000..b49b58c
--- /dev/null
+++ b/src/data/calendar/saints/st-donatus.yml
@@ -0,0 +1,22 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check on a clean year (2026-08-07, 2029-08-07) -- wins outright
+# at Simplex, alone. On a year where Aug 3 (the Finding of St. Stephen,
+# see finding-of-st-stephen.yml) falls on a Sunday, the *real* engine
+# transfers that Semiduplex feast forward past several higher-rank fixed
+# feasts (Dominic, Our Lady of the Snows, the Transfiguration) and lands
+# it here instead, reducing this saint to a mere commemoration for that
+# one year (confirmed live in both 2025 and 2031, both Aug-3-Sunday
+# years). This app's own transfer machinery doesn't chase a multi-day
+# skip search like that, so in this app Donatus wins here every year,
+# including ones where the real engine would displace him -- a known,
+# documented simplification, not a guess; see the regression test in
+# tests/calendar/august-sanctoral.test.ts. No unique collect regardless:
+# the raw file at this MM-DD slot (Sancti/08-07.txt) is actually St.
+# Cajetan's (a later, post-1617 addition to this filename slot, added
+# 1671) -- a live prayTertia query for the Monastic 1617 track returns no
+# Oratio at all, confirming propers: null is correct.
+id: st-donatus
+name: "St. Donatus, Bishop and Martyr"
+rank: simplex
+common: common-of-a-martyr-bishop
+propers: null
diff --git a/src/data/calendar/saints/st-hermes.yml b/src/data/calendar/saints/st-hermes.yml
new file mode 100644
index 0000000..7de0315
--- /dev/null
+++ b/src/data/calendar/saints/st-hermes.yml
@@ -0,0 +1,9 @@
+# Genuinely unwinnable stub (verified 2025-08-28, 2026-08-28) -- always
+# commemorated under St. Augustine (see st-augustine.yml), never wins
+# outright; both are fixed, non-movable dates, so this isn't an artifact
+# of the tested year. rank/propers unverified placeholders.
+id: st-hermes
+name: "St. Hermes, Martyr"
+rank: simplex
+common: common-of-a-martyr
+propers: null
diff --git a/src/data/calendar/saints/st-lawrence.yml b/src/data/calendar/saints/st-lawrence.yml
index a2e96c5..3b6d80c 100644
--- a/src/data/calendar/saints/st-lawrence.yml
+++ b/src/data/calendar/saints/st-lawrence.yml
@@ -1,8 +1,11 @@
 # Verified against Divinum Officium (web/www/horas/Latin/Sancti/08-10.txt,
 # untagged/default [Rank] block — the pre-1955 value, not the "(sed rubrica
-# 196)" alternate given alongside it in that file).
+# 196)" alternate given alongside it in that file). Propers backfilled
+# during the August pull (live kalendar/prayTertia check, 2026-08-10) now
+# that the collect-pulling methodology exists -- own proper collect and
+# antiphon.
 id: st-lawrence
 name: "St. Lawrence, Martyr"
 rank: duplex-2-classis
 common: common-of-a-martyr
-propers: null
+propers: "st-lawrence"
diff --git a/src/data/calendar/saints/st-louis.yml b/src/data/calendar/saints/st-louis.yml
new file mode 100644
index 0000000..08df5b3
--- /dev/null
+++ b/src/data/calendar/saints/st-louis.yml
@@ -0,0 +1,8 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check (2025-08-25) -- winner outright, Simplex, alone. Own
+# proper collect, no unique antiphon of his own.
+id: st-louis
+name: "St. Louis, King of France, Confessor"
+rank: simplex
+common: common-of-a-confessor-not-bishop
+propers: "st-louis"
diff --git a/src/data/calendar/saints/st-peter-ad-vincula.yml b/src/data/calendar/saints/st-peter-ad-vincula.yml
new file mode 100644
index 0000000..cc42fb0
--- /dev/null
+++ b/src/data/calendar/saints/st-peter-ad-vincula.yml
@@ -0,0 +1,14 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live kalendar
+# check (2026-08-01 and again 2029-08-01) -- winner outright, Duplex majus,
+# over Ss. Machabaeorum (see ss-machabees.yml). About St. Peter's own
+# deliverance from prison (Acts 12), not a feast of the Lord/BVM, so kept
+# in scope like the Conversion of St. Paul/Chair-of-Peter feasts. Own
+# proper collect; its [Ant 1] is a deliberate cross-reference to the
+# Chair-of-Peter-at-Antioch antiphon (@Sancti/02-22, already its own file
+# per the one-file-per-id convention), same reuse pattern as Ss. Peter and
+# Paul in June.
+id: st-peter-ad-vincula
+name: "St. Peter's Chains"
+rank: duplex-majus
+common: common-of-an-apostle
+propers: "st-peter-ad-vincula"
diff --git a/src/data/calendar/saints/st-romanus.yml b/src/data/calendar/saints/st-romanus.yml
new file mode 100644
index 0000000..148332b
--- /dev/null
+++ b/src/data/calendar/saints/st-romanus.yml
@@ -0,0 +1,17 @@
+# Genuinely unwinnable stub (verified 2025-08-09) -- always commemorated
+# under the Vigil of St. Lawrence (see vigil-of-st-lawrence.yml), never
+# wins outright, even though the Vigil's own rank (Simplex/vigil) is low --
+# vigils carry special forced-primacy rubrics regardless of ordinary rank
+# comparison. Both dates are fixed and non-movable, so this isn't an
+# artifact of the tested year. In years where Aug 9 is a Sunday, the vigil
+# itself is impeded and transfers backward to Saturday (see
+# tests/calendar/transfer.test.ts) -- Romanus still surfaces as a
+# commemoration on the Sunday even then (his loss to the vigil is a
+# separate local clash, independent of the vigil's own later transfer),
+# confirmed identically against the live reference engine (2026-08-09).
+# rank/propers unverified placeholders.
+id: st-romanus
+name: "St. Romanus, Martyr"
+rank: simplex
+common: common-of-a-martyr
+propers: null
diff --git a/src/data/calendar/saints/st-sabina.yml b/src/data/calendar/saints/st-sabina.yml
new file mode 100644
index 0000000..dd50c7c
--- /dev/null
+++ b/src/data/calendar/saints/st-sabina.yml
@@ -0,0 +1,10 @@
+# Genuinely unwinnable stub (verified 2025-08-29) -- always commemorated
+# under the Beheading of St. John the Baptist (see
+# decollation-of-st-john-baptist.yml), never wins outright; both are
+# fixed, non-movable dates, so this isn't an artifact of the tested year.
+# rank/propers unverified placeholders.
+id: st-sabina
+name: "St. Sabina, Martyr"
+rank: simplex
+common: common-of-a-martyr
+propers: null
diff --git a/src/data/calendar/saints/st-stephen-i.yml b/src/data/calendar/saints/st-stephen-i.yml
new file mode 100644
index 0000000..ea6e599
--- /dev/null
+++ b/src/data/calendar/saints/st-stephen-i.yml
@@ -0,0 +1,18 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check on a clean weekday (2027-08-02, a Monday) -- wins
+# outright at Simplex. On a Saturday this date is instead outranked by
+# the generic "Sanctae Mariae Sabbato" votive (see st-blaise.yml for the
+# same pattern first found in February), confirmed by re-checking a
+# Saturday year (2025-08-02) where the votive won instead -- an artifact
+# of the tested weekday, not a real block, same as June's Ss. Marcellinus/
+# Peter/Erasmus case. No unique collect: the raw file at this MM-DD slot
+# (Sancti/08-02.txt) is actually St. Alphonsus Liguori's (a later,
+# post-1617 addition to this filename slot, not this saint) -- a live
+# prayTertia query for the Monastic 1617 track returns no Oratio at all,
+# confirming propers: null is correct rather than a mismatch to chase
+# down, per the file-naming caution first documented in April/July.
+id: st-stephen-i
+name: "St. Stephen I, Pope and Martyr"
+rank: simplex
+common: common-of-a-martyr-bishop
+propers: null
diff --git a/src/data/calendar/saints/st-zephyrinus.yml b/src/data/calendar/saints/st-zephyrinus.yml
new file mode 100644
index 0000000..b91b1f3
--- /dev/null
+++ b/src/data/calendar/saints/st-zephyrinus.yml
@@ -0,0 +1,11 @@
+# Verified against Divinum Officium (Monastic Tridentinum 1617), live
+# kalendar check (2025-08-26) -- winner outright, Simplex, alone. Own
+# proper collect (source's own English translation drops a mid-word "e" of
+# "example" at a line break in both the raw file and the live query --
+# corrected here as a transcription artifact, same judgment call as
+# April's st-robert.yml name-form correction).
+id: st-zephyrinus
+name: "St. Zephyrinus, Pope and Martyr"
+rank: simplex
+common: common-of-a-martyr-bishop
+propers: "st-zephyrinus"
diff --git a/src/data/calendar/saints/vigil-of-st-bartholomew.yml b/src/data/calendar/saints/vigil-of-st-bartholomew.yml
new file mode 100644
index 0000000..38c8424
--- /dev/null
+++ b/src/data/calendar/saints/vigil-of-st-bartholomew.yml
@@ -0,0 +1,12 @@
+# A real vigil (2025-08-23, clean year -- St. Bartholomew's own date, Aug
+# 24, isn't a Sunday that year either). No unique collect: the raw file at
+# this MM-DD slot (Sancti/08-23.txt) is actually St. Philip Benizi's (a
+# later, post-1617 addition to this filename slot) -- a live prayTertia
+# query for the Monastic 1617 track returns no Oratio at all, confirming
+# propers: null is correct, same file-naming caution as St. Donatus and
+# the Vigil of St. Lawrence this month.
+id: vigil-of-st-bartholomew
+name: "Vigil of St. Bartholomew"
+rank: vigil
+common: common-of-a-vigil
+propers: null
diff --git a/src/data/calendar/sanctoral-calendar.yml b/src/data/calendar/sanctoral-calendar.yml
index 1327245..04a29a0 100644
--- a/src/data/calendar/sanctoral-calendar.yml
+++ b/src/data/calendar/sanctoral-calendar.yml
@@ -155,10 +155,42 @@ days:
   "07-28": [ss-nazarius-celsus-victor-and-innocent]
   "07-29": [st-martha, ss-felix-simplicius-faustinus-and-beatrix]
   "07-30": [ss-abdon-and-sennen]
-  "08-09": [vigil-of-st-lawrence]
+  # August — 8/12 of the pre-1955 pull. Four pre-existing entries from
+  # before this pull initiative (vigil-of-st-lawrence, st-lawrence,
+  # assumption, st-augustine) got their propers backfilled this month; see
+  # their own files. A genuinely new wrinkle this month: several dates
+  # have a real, named secondary saint permanently subordinate to a
+  # fixed, non-movable *octave* day (Lawrence's own Aug 10-17 octave, the
+  # Assumption's Aug 15-22 octave) or to the fixed Transfiguration (Aug
+  # 6) -- octaves and fixed Lord's feasts aren't modeled by this app (a
+  # known, explicitly deferred gap), so unlike the "genuinely unwinnable
+  # stub" pattern used elsewhere (where both competitors ARE modeled and
+  # the engine can correctly show the subordination), these can't be
+  # represented without incorrectly letting them win outright. Excluded
+  # entirely rather than guessed at: Ss. Xystus/Felicissimus/Agapitus
+  # (Aug 6, under the Transfiguration), Ss. Tiburtius and Susanna (Aug
+  # 11), St. Clare (Aug 12 -- notable: a genuinely major saint, not an
+  # obscure one, caught by this same gap), Ss. Hippolytus and Cassian
+  # (Aug 13), St. Agapitus (Aug 18), Ss. Timothy/Hippolytus/Symphorian
+  # (Aug 22). Also excluded: Our Lady of the Snows (Aug 5, fixed BVM
+  # feast, same convention as Purification/Annunciation).
+  "08-01": [st-peter-ad-vincula, ss-machabees]
+  "08-02": [st-stephen-i]
+  "08-03": [finding-of-st-stephen]
+  "08-04": [st-dominic]
+  "08-07": [st-donatus]
+  "08-08": [ss-cyriacus-largus-and-smaragdus]
+  "08-09": [vigil-of-st-lawrence, st-romanus]
   "08-10": [st-lawrence]
   "08-15": [assumption]
-  "08-28": [st-augustine]
+  "08-20": [st-bernard]
+  "08-23": [vigil-of-st-bartholomew]
+  "08-24": [st-bartholomew]
+  "08-25": [st-louis]
+  "08-26": [st-zephyrinus]
+  "08-28": [st-augustine, st-hermes]
+  "08-29": [decollation-of-st-john-baptist, st-sabina]
+  "08-30": [ss-felix-and-adauctus]
   "09-08": [nativity-bvm]
   "09-29": [st-michael]
   "11-01": [all-saints]