diff --git a/internal/build-packet-fixtures.mjs b/internal/build-packet-fixtures.mjs
new file mode 100644
index 000000000..2bdbc150d
--- /dev/null
+++ b/internal/build-packet-fixtures.mjs
@@ -0,0 +1,82 @@
+#!/usr/bin/env node
+/**
+ * build-packet-fixtures — build every committed packet fixture, so check:packets-all has more
+ * than one SHAPE to evaluate.
+ *
+ * THE GAP THIS CLOSES. check:packets-all reported "every generated packet renders, in every locale
+ * present" and passed on 11 packets — all of them the SAME ZONE (laos) in 11 locales, against 28
+ * poster zones. The suite proved one zone's layout eleven times. Generating all 28 x 11 is a
+ * network fetch per zone and ~100MB of artefacts, so the answer is not more zones: it is more
+ * SHAPES, chosen where the layout can actually break, built from committed records with no network.
+ *
+ * ★ THE SHAPES ARE THE PAGE BOUNDARY. packet-render.js:76 sets PER_PAGE = 20, and pagination is
+ * `for (start = 0; start < groups.length; start += PER_PAGE)`. laos has 95 groups and tibet 43 —
+ * both mid-range, both remainder cases, so the boundary itself had NEVER been rendered:
+ *   - exactly 20  : one full page. An off-by-one here yields 2 list pages, the second empty.
+ *   - 21          : two pages, the second holding a SINGLE card.
+ *   - 1           : the minimum a zone can have.
+ * Each is derived by slicing the committed tibet fixture, so they are byte-deterministic and need
+ * no API.
+ *
+ * ⚠ EACH BUILD OVERWRITES THE PREVIOUS ONE, which is the reason this script exists rather than a
+ * line of shell. packet.mjs names its output for the ZONE, not the fixture, so four fixture builds
+ * against one zone leave one file — and check:packets-all would go on seeing a single shape while
+ * reporting success. Each output is renamed to its fixture's own name so all of them coexist and
+ * every one gets evaluated.
+ *
+ * Usage: node internal/build-packet-fixtures.mjs
+ */
+import { existsSync, renameSync, readdirSync } from 'node:fs'
+import { resolve, dirname, join } from 'node:path'
+import { fileURLToPath } from 'node:url'
+import { spawnSync } from 'node:child_process'
+
+const HERE = dirname(fileURLToPath(import.meta.url))
+const REPO = process.env.DOXA_REPO || resolve(HERE, '..')
+const FIXTURES = resolve(REPO, 'library/scripts/posters/fixtures')
+const OUT = resolve(REPO, 'library/scripts/posters/out/packets')
+// Every fixture is built against this zone: the records come from the fixture, and the zone only
+// supplies page 1's map. Keeping it constant means a shape difference is the ONLY variable.
+const ZONE = 'asia-china-tibet-autonomous-region'
+
+if (!existsSync(FIXTURES)) {
+  console.log(`PACKET-FIXTURES: SKIP — no fixtures directory at ${FIXTURES}`)
+  process.exit(0)
+}
+
+const fixtures = readdirSync(FIXTURES).filter((f) => /^records-.*\.json$/.test(f)).sort()
+if (!fixtures.length) {
+  console.log('PACKET-FIXTURES: SKIP — no records-*.json fixtures committed')
+  process.exit(0)
+}
+
+console.log(`PACKET-FIXTURES: building ${fixtures.length} fixture(s)`)
+const built = []
+const failed = []
+
+for (const fx of fixtures) {
+  const name = fx.replace(/^records-/, '').replace(/\.json$/, '')
+  const res = spawnSync(process.execPath, [join(REPO, 'library/scripts/posters/packet.mjs')], {
+    cwd: REPO,
+    encoding: 'utf8',
+    env: { ...process.env, PACKET_RECORDS: join(FIXTURES, fx), ONLY: ZONE },
+  })
+  const produced = join(OUT, `${ZONE}.html`)
+  if (res.status !== 0 || !existsSync(produced)) {
+    failed.push(`${fx}: ${(res.stderr || res.stdout || '').trim().split('\n').slice(-1)[0] || 'no output'}`)
+    console.log(`  ✗ ${fx}`)
+    continue
+  }
+  // Rename BEFORE the next build, or the next one overwrites it — see the warning above.
+  const dest = join(OUT, `fixture-${name}.html`)
+  renameSync(produced, dest)
+  built.push(`fixture-${name}.html`)
+  console.log(`  ✓ ${fx} -> fixture-${name}.html`)
+}
+
+if (failed.length) {
+  console.error(`\nPACKET-FIXTURES: FAIL — ${failed.length} fixture(s) did not build`)
+  for (const f of failed) console.error('  - ' + f)
+  process.exit(1)
+}
+console.log(`\nPACKET-FIXTURES: ${built.length} packet(s) built. Run check:packets-all to evaluate them.`)
diff --git a/library/scripts/posters/fixtures/records-edge-21-groups.json b/library/scripts/posters/fixtures/records-edge-21-groups.json
new file mode 100644
index 000000000..2debc1bf0
--- /dev/null
+++ b/library/scripts/posters/fixtures/records-edge-21-groups.json
@@ -0,0 +1,578 @@
+[
+ {
+  "slug": "adi",
+  "name": "Adi",
+  "country_code": "CHN",
+  "population": "1400",
+  "religion": "E",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://flickr.com/photos/ramesh_lalwani/8169468855/",
+    "text": "Ramesh Lalwani - Flickr"
+   }
+  ],
+  "latitude": "29.24961200",
+  "longitude": "95.17182400",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion"
+ },
+ {
+  "slug": "ainu-china",
+  "name": "Ainu",
+  "country_code": "CHN",
+  "population": "11000",
+  "religion": "MSN",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "38.93020500",
+  "longitude": "76.16959600",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Islam - Sunni"
+ },
+ {
+  "slug": "alxa-mongols",
+  "name": "Alxa Mongols",
+  "country_code": "CHN",
+  "population": "35500",
+  "religion": "MSN",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "39.20798700",
+  "longitude": "101.67522000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Islam - Sunni"
+ },
+ {
+  "slug": "bogar-lhoba",
+  "name": "Bogar Lhoba",
+  "country_code": "CHN",
+  "population": "5300",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By bojum"
+   }
+  ],
+  "latitude": "28.74470000",
+  "longitude": "93.64580000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "bogol",
+  "name": "Bogol",
+  "country_code": "CHN",
+  "population": "1400",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "48.46892600",
+  "longitude": "124.48821300",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "boyu-tibetans",
+  "name": "Boyu Tibetans",
+  "country_code": "CHN",
+  "population": "5400",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "33.36236100",
+  "longitude": "104.58044400",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "bunan",
+  "name": "Bunan",
+  "country_code": "CHN",
+  "population": "2500",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "31.79607000",
+  "longitude": "78.90344000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "buryat",
+  "name": "Buryat",
+  "country_code": "CHN",
+  "population": "170000",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://commons.wikimedia.org/wiki/File:Me_and_a_Buryat.jpg",
+    "text": "Telaneo - Wikimedia"
+   }
+  ],
+  "latitude": "48.75926000",
+  "longitude": "117.78630000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "butuo-nosu",
+  "name": "Butuo Nosu",
+  "country_code": "CHN",
+  "population": "337000",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By Anonymous"
+   }
+  ],
+  "latitude": "27.60452900",
+  "longitude": "102.87518600",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "cona-monba",
+  "name": "Cona Monba",
+  "country_code": "CHN",
+  "population": "58500",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of Joshua Project by Anonymous"
+   }
+  ],
+  "latitude": "27.89404900",
+  "longitude": "92.20691400",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "darang-deng",
+  "name": "Darang Deng",
+  "country_code": "CHN",
+  "population": "12500",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "28.37980000",
+  "longitude": "97.02930000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "enger-yugur",
+  "name": "Enger Yugur",
+  "country_code": "CHN",
+  "population": "5500",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://flickr.com/photos/mke1963/154213183/",
+    "text": "Mark mke1963 - Flickr"
+   }
+  ],
+  "latitude": "37.98815000",
+  "longitude": "101.76214000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "ersu",
+  "name": "Ersu",
+  "country_code": "CHN",
+  "population": "48000",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "29.23558500",
+  "longitude": "102.35591600",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "geman-deng",
+  "name": "Geman Deng",
+  "country_code": "CHN",
+  "population": "16500",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "28.47324000",
+  "longitude": "97.04437000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "heishui",
+  "name": "Heishui",
+  "country_code": "CHN",
+  "population": "48500",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": null,
+  "latitude": "32.19164300",
+  "longitude": "103.03860100",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "henan-mongols",
+  "name": "Henan Mongols",
+  "country_code": "CHN",
+  "population": "43000",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": null,
+  "latitude": "34.73230000",
+  "longitude": "101.60860000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "keji",
+  "name": "Keji",
+  "country_code": "CHN",
+  "population": "2600",
+  "religion": "MSN",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.paulnoll.com/China/Minorities/China-Nationalities.html",
+    "text": "Paul Noll"
+   }
+  ],
+  "latitude": "29.65355100",
+  "longitude": "91.12095900",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Islam - Sunni"
+ },
+ {
+  "slug": "kyrgyz",
+  "name": "Kyrgyz",
+  "country_code": "CHN",
+  "population": "195000",
+  "religion": "MOF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://commons.wikimedia.org/wiki/File:Kyrgyz_women_offering_butter_and_salt.jpg",
+    "text": "Theklan - Wikimedia"
+   }
+  ],
+  "latitude": "38.01774000",
+  "longitude": "76.09630000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Islam - Folk"
+ },
+ {
+  "slug": "luzu",
+  "name": "Luzu",
+  "country_code": "CHN",
+  "population": "1600",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "28.33754000",
+  "longitude": "101.35823900",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "manyak",
+  "name": "Manyak",
+  "country_code": "CHN",
+  "population": "3000",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "29.67090000",
+  "longitude": "101.59510000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "medog-monba",
+  "name": "Medog Monba",
+  "country_code": "CHN",
+  "population": "11000",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "29.46300000",
+  "longitude": "95.74060000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ }
+]
diff --git a/library/scripts/posters/fixtures/records-edge-exactly-20.json b/library/scripts/posters/fixtures/records-edge-exactly-20.json
new file mode 100644
index 000000000..cf2c4fcac
--- /dev/null
+++ b/library/scripts/posters/fixtures/records-edge-exactly-20.json
@@ -0,0 +1,548 @@
+[
+ {
+  "slug": "adi",
+  "name": "Adi",
+  "country_code": "CHN",
+  "population": "1400",
+  "religion": "E",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://flickr.com/photos/ramesh_lalwani/8169468855/",
+    "text": "Ramesh Lalwani - Flickr"
+   }
+  ],
+  "latitude": "29.24961200",
+  "longitude": "95.17182400",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion"
+ },
+ {
+  "slug": "ainu-china",
+  "name": "Ainu",
+  "country_code": "CHN",
+  "population": "11000",
+  "religion": "MSN",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "38.93020500",
+  "longitude": "76.16959600",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Islam - Sunni"
+ },
+ {
+  "slug": "alxa-mongols",
+  "name": "Alxa Mongols",
+  "country_code": "CHN",
+  "population": "35500",
+  "religion": "MSN",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "39.20798700",
+  "longitude": "101.67522000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Islam - Sunni"
+ },
+ {
+  "slug": "bogar-lhoba",
+  "name": "Bogar Lhoba",
+  "country_code": "CHN",
+  "population": "5300",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By bojum"
+   }
+  ],
+  "latitude": "28.74470000",
+  "longitude": "93.64580000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "bogol",
+  "name": "Bogol",
+  "country_code": "CHN",
+  "population": "1400",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "48.46892600",
+  "longitude": "124.48821300",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "boyu-tibetans",
+  "name": "Boyu Tibetans",
+  "country_code": "CHN",
+  "population": "5400",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "33.36236100",
+  "longitude": "104.58044400",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "bunan",
+  "name": "Bunan",
+  "country_code": "CHN",
+  "population": "2500",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "31.79607000",
+  "longitude": "78.90344000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "buryat",
+  "name": "Buryat",
+  "country_code": "CHN",
+  "population": "170000",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://commons.wikimedia.org/wiki/File:Me_and_a_Buryat.jpg",
+    "text": "Telaneo - Wikimedia"
+   }
+  ],
+  "latitude": "48.75926000",
+  "longitude": "117.78630000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "butuo-nosu",
+  "name": "Butuo Nosu",
+  "country_code": "CHN",
+  "population": "337000",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By Anonymous"
+   }
+  ],
+  "latitude": "27.60452900",
+  "longitude": "102.87518600",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "cona-monba",
+  "name": "Cona Monba",
+  "country_code": "CHN",
+  "population": "58500",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of Joshua Project by Anonymous"
+   }
+  ],
+  "latitude": "27.89404900",
+  "longitude": "92.20691400",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "darang-deng",
+  "name": "Darang Deng",
+  "country_code": "CHN",
+  "population": "12500",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "28.37980000",
+  "longitude": "97.02930000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "enger-yugur",
+  "name": "Enger Yugur",
+  "country_code": "CHN",
+  "population": "5500",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://flickr.com/photos/mke1963/154213183/",
+    "text": "Mark mke1963 - Flickr"
+   }
+  ],
+  "latitude": "37.98815000",
+  "longitude": "101.76214000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "ersu",
+  "name": "Ersu",
+  "country_code": "CHN",
+  "population": "48000",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "29.23558500",
+  "longitude": "102.35591600",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "geman-deng",
+  "name": "Geman Deng",
+  "country_code": "CHN",
+  "population": "16500",
+  "religion": "ECF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "28.47324000",
+  "longitude": "97.04437000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion - Chinese Folk Religion"
+ },
+ {
+  "slug": "heishui",
+  "name": "Heishui",
+  "country_code": "CHN",
+  "population": "48500",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": null,
+  "latitude": "32.19164300",
+  "longitude": "103.03860100",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "henan-mongols",
+  "name": "Henan Mongols",
+  "country_code": "CHN",
+  "population": "43000",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": null,
+  "latitude": "34.73230000",
+  "longitude": "101.60860000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "keji",
+  "name": "Keji",
+  "country_code": "CHN",
+  "population": "2600",
+  "religion": "MSN",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.paulnoll.com/China/Minorities/China-Nationalities.html",
+    "text": "Paul Noll"
+   }
+  ],
+  "latitude": "29.65355100",
+  "longitude": "91.12095900",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Islam - Sunni"
+ },
+ {
+  "slug": "kyrgyz",
+  "name": "Kyrgyz",
+  "country_code": "CHN",
+  "population": "195000",
+  "religion": "MOF",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://commons.wikimedia.org/wiki/File:Kyrgyz_women_offering_butter_and_salt.jpg",
+    "text": "Theklan - Wikimedia"
+   }
+  ],
+  "latitude": "38.01774000",
+  "longitude": "76.09630000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Islam - Folk"
+ },
+ {
+  "slug": "luzu",
+  "name": "Luzu",
+  "country_code": "CHN",
+  "population": "1600",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "28.33754000",
+  "longitude": "101.35823900",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ },
+ {
+  "slug": "manyak",
+  "name": "Manyak",
+  "country_code": "CHN",
+  "population": "3000",
+  "religion": "BLA",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://www.asiaharvest.org",
+    "text": "Operation China, Asia Harvest"
+   }
+  ],
+  "latitude": "29.67090000",
+  "longitude": "101.59510000",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Buddhism - Tibetan"
+ }
+]
diff --git a/library/scripts/posters/fixtures/records-edge-one-group.json b/library/scripts/posters/fixtures/records-edge-one-group.json
new file mode 100644
index 000000000..88bb0259a
--- /dev/null
+++ b/library/scripts/posters/fixtures/records-edge-one-group.json
@@ -0,0 +1,32 @@
+[
+ {
+  "slug": "adi",
+  "name": "Adi",
+  "country_code": "CHN",
+  "population": "1400",
+  "religion": "E",
+  "has_photo": false,
+  "picture_credit": [
+   {
+    "link": null,
+    "text": "Photo courtesy of "
+   },
+   {
+    "link": "https://www.joshuaproject.net",
+    "text": "Joshua Project"
+   },
+   {
+    "link": null,
+    "text": ". By "
+   },
+   {
+    "link": "https://flickr.com/photos/ramesh_lalwani/8169468855/",
+    "text": "Ramesh Lalwani - Flickr"
+   }
+  ],
+  "latitude": "29.24961200",
+  "longitude": "95.17182400",
+  "country_code_label": "People's Republic of China",
+  "religion_label": "Ethnoreligion"
+ }
+]
diff --git a/package.json b/package.json
index 93061e749..343a0bf74 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
     "packets": "cd library/scripts/posters && VITE_API_BASE_URL=https://pray.doxa.life node packet.mjs   # the prayer packets. READS out/posters/<zone>.html for page 1's map, which `bun run posters` writes — without it the packet still builds and page 1 is simply BLANK, so the script now warns per-zone AND in its summary. PACKET_LANG=<loc> for one language, ONLY=<zoneKey> for one zone, NOPHOTOS=1 to skip the photo fetch.",
     "packet-fixture": "node internal/generate-packet-fixture.mjs   # regenerate the committed records subset (smallest zone, image_url stripped) that lets CI build a packet at all — out/ is gitignored, so a clean checkout has neither the records cache nor any packet.",
     "check:packet-fixture": "node internal/generate-packet-fixture.mjs --check   # the committed fixture must still match clusters.json and must never carry image_url (CI would fetch 43 photos from someone else's CDN).",
-    "packet:ci": "sh -c 'F=\"$PWD/library/scripts/posters/fixtures/records-tibet.json\"; PACKET_RECORDS=\"$F\" ONLY=asia-china-tibet-autonomous-region node library/scripts/posters/packet.mjs'   # build ONE packet from the committed fixture, no network. This is what makes check:packets-all evaluate something in CI instead of SKIPping, as it had on every build.",
+    "packet:ci": "node internal/build-packet-fixtures.mjs   # build EVERY committed fixture, no network, each renamed to its own output so they coexist. Was one fixture (tibet); packet.mjs names its output for the ZONE not the fixture, so sequential builds overwrote each other and check:packets-all saw a single SHAPE while reporting success. The fixtures are chosen at the PER_PAGE=20 page boundary — exactly 20, 21, and 1 group — because laos (95) and tibet (43) are both mid-range remainder cases and the boundary itself had never rendered.",
     "token": "node internal/write-token.mjs",
     "smoke": "node internal/smoke.mjs",
     "smoke:embeds": "node internal/embed-smoke.mjs",