feat(fixtures): season-2026 practice corpus loader and integrity test (8.0)

fixtures/season-2026/practice/README.md

@@ -19,7 +19,13 @@ identities replaced. Concretely:
   pseudonyms read off the published corpus. That join produced a 1:1 map with
   **zero ambiguity** on all four axes: 6 venues, 22 fields, 136 team codes, and
   215 coach assignments resolving to 196 distinct people — the same 215/196 the
-  game corpus states. No corpus pseudonym was changed.
+  game corpus states. No corpus pseudonym was changed. The 215/196 reconcile.
+  The 6 / 22 / 136 are **unreconciled** against the published game corpus,
+  which has 7 venues and 24 field ids in play in `../combined_schedule.csv`
+  and 132 roster teams. 136 admits two readings: (a) 131 roster teams with a
+  game plus 5 visiting-club labels, or (b) 132 roster teams plus 4 Minis
+  sessions. No reading of 6 or 22 was found.
+  `tests/season2026PracticeCorpus.test.js` records this rather than choosing.
 - **People not in the game corpus** (registrants who coach no team, all players)
   were minted fresh with unique surnames, so a shared surname never implies a
   family that the source did not state. The 53 shared surnames in the combined
@@ -61,7 +67,14 @@ The real→pseudonym map is **not** in this repo and must not be committed.
 ## Known-good invariants (assert these)
 
 - 457 practice rows across 7 source sheets; 88 distinct teams hold a practice
-  slot; 65 teams that play a game hold none in the parsed sheets.
+  slot. The source claimed **65** teams that play a game hold none in the
+  parsed sheets; that figure does not derive from the corpus. Enumerated from
+  `../coach_roster.csv` (131 roster teams appear in `../combined_schedule.csv`,
+  87 of them hold a slot) it is **44**; enumerated from every named side of
+  `../combined_schedule.csv`, Minis sessions and visiting-club labels included
+  (140 sides), it is **53**. The loader emits the 44 as
+  `ROSTER_TEAM_HOLDS_NO_PRACTICE` findings; the 53 is computed in
+  `tests/season2026PracticeCorpus.test.js`, which asserts both.
 - Exactly one practice team (`16BSelect02`) plays no game in
   `../combined_schedule.csv` — it is a Select team whose league layer is
   unassigned slots.

packages/core/src/fixtures/index.js

@@ -53,8 +53,55 @@ export {
   resolveSunsetMinutes,
   scheduledOccupancyMinutes,
   toNaiveIso,
+  trim,
   weekdayCode,
   PLACEHOLDER_TOKEN,
   REC_FORMATS,
   SEASON_2026_ROW_KIND,
 } from './season2026Parsers.js';
+
+export {
+  computePracticeFixtureChecksums,
+  crossCorpusFindings,
+  loadPracticeFile,
+  loadSeason2026Practice,
+  practiceFixtureFilePath,
+  readPracticeFixtureFile,
+  SEASON_2026_PRACTICE_FILES,
+  SEASON_LONG_CLOSURE_MIN_FRACTION,
+  ALL_DAY_CLOSE_MINUTES,
+} from './season2026PracticeLoader.js';
+
+export {
+  compareDecoderRings,
+  expectCsvColumns,
+  inclusiveSpanDays,
+  makePracticeFinding,
+  parseClock24Minutes,
+  parseCoachRegistration,
+  parseFieldCodeNames,
+  parseFieldConstraints,
+  parseFieldEquipment,
+  parseFieldInventory,
+  parseGameChangeLog,
+  parseMonthDayDate,
+  parsePermitReservations,
+  parsePermits,
+  parsePlayerRegistration,
+  parsePracticeFieldAliases,
+  parsePracticeGrid,
+  parseSelectCoaches,
+  parseWeeklyAvailability,
+  selectTeamCode,
+  weekdayCodeOfDayName,
+  AVAILABILITY_INTERPRETATIONS,
+  DECODER_DISAGREEMENT_KIND,
+  PracticeFindingSchema,
+  REGISTRATION_REF_CLASSES,
+  SEASON_2026_PRACTICE_COLUMNS,
+  SEASON_2026_PRACTICE_FINDING,
+  SEASON_2026_PRACTICE_FINDING_SEVERITY,
+  SEASON_2026_PRACTICE_PARSERS,
+  SEASON_2026_PRACTICE_SCHEMAS,
+  UNRESOLVED_VENUE_TOKEN,
+} from './season2026PracticeParsers.js';

packages/core/src/fixtures/season2026Loader.js

@@ -102,15 +102,16 @@ export function readFixtureFile(fileName, dir = DEFAULT_FIXTURE_DIR) {
 
 /**
  * SHA-256 of every corpus file, so a test can prove a load left the sources
- * byte-identical.
+ * byte-identical. The practice corpus loader reuses it with its own file list.
  *
  * @param {string} [dir]
+ * @param {ReadonlyArray<string>} [files]
  * @returns {Record<string, string>}
  */
-export function computeFixtureChecksums(dir = DEFAULT_FIXTURE_DIR) {
+export function computeFixtureChecksums(dir = DEFAULT_FIXTURE_DIR, files = SEASON_2026_FILES) {
   /** @type {Record<string, string>} */
   const out = {};
-  for (const fileName of SEASON_2026_FILES) {
+  for (const fileName of files) {
     const bytes = readFileSync(fixtureFilePath(fileName, dir));
     out[fileName] = createHash('sha256').update(bytes).digest('hex');
   }

packages/core/src/fixtures/season2026Parsers.js

@@ -214,7 +214,7 @@ export function parseCsv(text, label = 'csv') {
   return /** @type {Array<Record<string, string>>} */ (result.data);
 }
 
-const trim = (value) => String(value ?? '').trim();
+export const trim = (value) => String(value ?? '').trim();
 
 /* -------------------------------------------------------------------------- */
 /* game_formats.csv                                                            */