Review of the llws_20 bracket turned up two display bugs in the shared
ranking code, both triggered by the template setting loserFeedsInto on
every winners-bracket round.
findConsolationRound took the FIRST round with loserFeedsInto and
treated its target as a third-place game. That is sound for fifa_48,
whose only such round is the Semifinals, but llws_20 uses loserFeedsInto
to route losers into the elimination bracket — so "Elimination Round 1"
was being read as the consolation game. Its four matches were then
placed as exact positions inside the Opening Round tier, corrupting the
final rankings list. A consolation round now has to be terminal: its
winner plays no further game, which is precisely what lets its result
split two exact positions.
The rank walk also advanced by a round's match count on the assumption
that every match places its loser. That holds in single elimination and
must be kept for undecided rounds — four semifinalists occupy positions
1-4 whether or not the games have been played — but a winners-bracket
loss places nobody, since the loser drops into the elimination bracket
and is ranked by whatever knocks them out later. Those rounds consumed
positions they never filled, so a 20-team bracket ranked its last teams
T23. Rounds whose losers are placed later now consume nothing, leaving
LLWS at 1, T2, 3, 4, T5, T7, T9, T13, T17 for the full 20-team field.
Single-elimination templates are unaffected; afl_10's sub-8th ranks were
inflated the same way and are now correct too.
Also from review: the llws_20 participant labels were 21-24 characters
in an 80px fixed-width admin column and would have wrapped to three
lines across all 20 rows. Shortened them and widened the column.
Tests play a full 20-team tournament through the real advancement map
and assert the resulting rank labels.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EAxqBVzfmKJe6WQ6VF9guj
The Little League Baseball World Series runs two independent 10-team
double-elimination brackets — United States and International — each
producing a side champion, then a World Championship game and a
Consolation Third Place game between the side runners-up. 38 games in
all. No existing template could express it: every one is single
elimination, at most with a bolted-on third-place game.
Adds the llws_20 template plus dedicated generation and advancement,
following the same bespoke-routing pattern afl_10 and nba_20 use rather
than the generic ceil(matchNumber / 2) advancement.
The core of the change is loser routing. In the winners bracket a loss
is not an elimination — it drops the team into the elimination bracket
at a specific slot, including the deliberate cross-overs the official
bracket uses (Elimination Round 1 pairs L4/L6 and L2/L8; Elimination
Round 3 pairs each semifinal loser with the winner from the opposite
half). In the elimination bracket a loss is final. Matching the official
modified double-elimination format, there is no "if necessary" game: the
winners-bracket champion is eliminated if it loses the side
championship, dropping to the consolation game.
Rounds are shared across both sides, U.S. taking the low match numbers
and International the high ones, so the scoring config stays one entry
per stage. The existing phases/groups display machinery splits them back
apart into United States / International / Championship tabs.
Scoring lands on exactly 8 point-earning teams, which is the field size
when Elimination Round 4 begins: the two finals decide 1st–4th,
Elimination Final losers take 5th–6th, and Elimination Round 4 losers
7th–8th. 3rd and 4th are distinct because the consolation game is real,
and 5–8 splits into two two-team tiers so surviving Elimination Round 4
is worth more than losing it.
Also:
- Adds an optional nonScoringWinnerFloor to BracketRound. The engine
hardcoded a 5th-place floor for winners of non-scoring rounds feeding
a scoring one, which is wrong inside a losers bracket where a win can
guarantee only 7th. Opt-in, so no existing template changes behavior.
- Fixes TabbedBracketLayout's mobile path, which built its match map
unfiltered and so would have merged U.S. and International games into
one column. No-op for NCAA and NBA, whose groups already cover every
match in their phases.
- Rewrites the LLWS Monte Carlo simulator, which still modelled the
retired pool-play format (5 teams per pool, then a 4-team bracket per
side) and no longer described the tournament being scored. It now runs
the real 10-team double elimination and splits the 5–8 probabilities
into the correct tiers instead of one even four-way split. Legacy
"US:A"/"Intl:B" externalIds are still accepted, read as the side
alone, so seasons configured for the old format keep loading.
Tests replay all 38 games through the pure advancement resolver and
assert each one against the feed labels printed on the official bracket.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EAxqBVzfmKJe6WQ6VF9guj
Make a "major" (golf/tennis/CS2) scored once on its canonical tournament
and fan out to every linked sports_season window and league.
Fan-out & completion (app/services/sync-tournament-results.ts):
- syncTournamentResults now marks each synced window's event complete
(gated by markComplete), recalculates affected leagues, and counts
recalc failures so a stale league can't hide behind a "completed" badge
- syncMajorFromPrimaryEvent promotes a primary window's derived results to
canonical tournament_results (deleting rows for dropped placements) and
fans out to siblings; fanOutMajorIfPrimary guards on the primary
- placement removals now propagate (stale rows reset to filler)
Primary-event model (scoring_events.is_primary, migration 0122):
- getPrimaryEventForTournament / isReadOnlySibling / ensurePrimaryEvent /
setPrimaryEvent; event creation auto-seeds a primary for bracket majors;
"Make primary" button on the tournament page
- per-window event/bracket/cs2 pages are read-only for non-primary linked
events (not-participating stays editable)
Tennis Grand Slam bracket (tennis_128 template + TEMPLATE_ROUND_CONFIG):
- bracket-scored qualifying major via the existing bracket pipeline
- simulator conditions in-progress EV on the real bracket (honoring
completed matches, walkover for withdrawals), QP derived from config,
round structure read from the template; CS2 + tennis share resolveStructureSource
Backfill (scripts/backfill-major-linking.ts): one-time idempotent reconcile
of existing majors (link orphans, designate primary, promote canonical, sync).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
* Redesign home page with new layout and component system
- Two-column layout (My Leagues 2/3, Upcoming Events 1/3) with mobile stack
- LeagueRow: square avatar, gradient draft highlight, rank/points display, progress bar
- MyLeaguesCard, CreateLeagueCard with shared SectionCardHeader
- UpcomingEventsCard: vertical timeline with grouped multi-league events
- Shared gradient system: BracktGradients SVG defs, GradientIcon wrapper, brand.ts constants
- Button default variant updated to green→cyan gradient
- Navbar: plain nav links with gradient hover, support/admin icon buttons
- Accessibility fixes: semantic h2 headings, aria-label on LeagueAvatar and nav elements
- Storybook stories for all new components
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Responsive league row layout and mobile polish
- League rows stack avatar+name on top, stats full-width below on mobile
- Stats spread to right side on sm+ screens with border separator on mobile
- Tighter padding on mobile (px-3/py-3), full padding on sm+
- Card headers and content use px-3 sm:px-6 to reduce mobile gutters
- Two-column home layout deferred to lg breakpoint (tablet gets stacked)
- Active leagues sorted by completion percentage descending
- Default rank 1 / 0 points for active leagues with no scoring events yet
- Fix ordinal bug for 11th/12th/13th; add aria-labels to rank change indicators
- Remove dead StatDivider className prop
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Improve claude file.
* Add StandingsPreview card component with podium row styling
- New StandingsPreview component with gold/silver/bronze row tints for
top 3, team avatar, and LeagueRow-style stat columns (Ranking + Points)
with rank and 7-day point change indicators
- Fix GradientIcon in Storybook by adding BracktGradients decorator to
preview.tsx (renamed from .ts to support JSX)
- Fix degenerate SVG gradient on horizontal strokes by switching
BracktGradients to gradientUnits="userSpaceOnUse" with Lucide-space
coordinates (0→24)
- Revert erroneous fill: url(#gradient) from GradientIcon; stroke-only
fix was sufficient once gradientUnits was corrected
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Update components on league homepage.
* Finish up league page styling.
* Work on standings page.
* Add story for RecentScoresCard
* Update Point Progression Chart.
* Sort point progression legend by ranking and add team links to standings rows
* Fix standings discrepancy on change.
* Create draft cell component.
* Update draft board page
* Draft room improvements.
* Update some draft room styling.
* Fix context menu missing.
* Move tab navigation and autodraft to header row, narrow sidebar
* Virtualize available participants list, memoize draft room props
Adds @tanstack/react-virtual to replace separate mobile/desktop lists
with a single unified virtual scroll loop. Also memoizes miniDraftGrid
and availableParticipantsSectionProps, and switches pick lookup from
Array.find to a Map for O(1) access.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Update draft room UI.
* More draft room fixes.
* Draft room tweaks.
* Fix Rosters page.
* Queue Section fixes.
* Mobile Draft fixes.
* Fix draft board page.
* Create bracket look.
* Bracket work.
* Finish bracket page.
* Homepage initial styling
* homepage copy
* Add privacy policy. Fixes#88.
* how to play copy
* rules copy
* Fix brackets on homepage.
* Add footer to website.
* Glow on dots.
* Landing page copy.
* Fix sidebar.
---------
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Adds the NBA_20 bracket template (20-team structure with play-in
tournament) and rewrites the NBA simulator to be bracket-aware like UCL.
- Add NBA_20 bracket template: PIR1 (4) → PIR2 (2) → First Round (8)
→ Conference Semifinals → Conference Finals → NBA Finals
- Add participantLabels (East/West 1–10) for admin bracket UI slot labels
- Add generateNBA20Bracket and advanceNBAPlayInWinner in playoff-match.ts
with custom play-in advancement logic (PIR1 winners go to two different
destinations)
- Rewrite NBASimulator with two auto-detected modes:
- Bracket-aware (preferred): reads actual bracket state, simulates only
remaining rounds forward using 50k Monte Carlo iterations
- Season-projection (fallback): existing logic for pre-playoff use
- Guard resolveGame/resolveSeries against null participants (throws with
match ID and slot info instead of silently using empty string)
- Document load-bearing First Round match ordering in generateNBA20Bracket
- Add 25 unit tests covering Elo math, team data, template structure,
and all simulator integration paths
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Fixes#124
* Add NCAA Football CFP simulator (12-team bracket)
Implements a Monte Carlo simulator for the College Football Playoff using
the 2024-present 12-team format. Elo/FPI ratings are entered manually via
the existing admin Elo Ratings page; championship futures odds can
optionally be blended in (60% Elo / 40% odds).
- Add CFP_12 bracket template (First Round not scoring, QFs onward score)
- Add generateCFP12Bracket() with correct seeding: 5v12, 6v11, 7v10, 8v9
in First Round; seeds 1–4 receive QF byes
- Add NCAAFootballSimulator: 50k Monte Carlo sims, seeds teams by blended
Elo+odds strength, tracks champion/finalist/SF/QF placement tiers
- Register ncaa_football_bracket simulator type in registry and schema enum
- Add migration 0071: ALTER TYPE simulator_type ADD VALUE 'ncaa_football_bracket'
- Add tests: 30 tests covering bracket template structure and simulator
probability distributions, seeding, edge cases, futures blending
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Fix lint errors in NCAA Football CFP simulator
Replace non-null assertions with optional chaining, change let to const,
use toSorted() instead of sort(), and add a bump() helper to avoid
repeated map lookups with non-null assertions in simulateBracket.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Fix TS2345 in NCAA football simulator test
Add ?? 0 fallback so optional-chained probFirst is number, not number | undefined.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Fixes#123
* Add PDC World Darts Championship simulator (128-player bracket)
- New DartsSimulator: 128-player single-elimination, 7 rounds with
PDC-accurate best-of-sets formats (bo3/bo5/bo5/bo7/bo7/bo11/bo13).
ELO_DIVISOR=500 via set-level Bernoulli model. Two simulation paths:
Path A (bracket drawn) simulates from actual DB matches; Path B
(pre-bracket) seeds top 32 by world ranking in fixed positions and
randomly draws the remaining 96 per simulation run (50,000 iterations).
- darts_bracket added to simulatorTypeEnum and simulator registry.
- world_ranking nullable integer column added to participant_expected_values
(migration 0067); batchSaveSourceElos now accepts and persists it.
- Admin route /admin/sports-seasons/:id/darts-elo: bulk import with format
"Player Name, 2099, 1" (name, Elo, optional world ranking), fuzzy name
matching, auto-runs simulation and updates EV/snapshots on save.
- DARTS_128 bracket template added (scoring starts at Quarterfinals).
- 30 unit tests: math helpers, bracket seeding structure, Path A/B integration.
https://claude.ai/code/session_01WZ6FjMmC2eBeZ1564M9Ruz
* Review fixes: pre-compute hot-loop invariants, import normalizeName
- Pre-compute seededSlots and getSeededMatchOrder(32) before the 50k
simulation loop — was being recomputed every iteration
- Pad unseeded pool to 96 once before the loop instead of inside it
- Inline bracket-building in the hot loop using pre-computed seededSlots;
removes the per-iteration call to buildR1Bracket/getSeededMatchOrder
- Remove dead SEEDED_R1_PAIRS constant (was never referenced)
- Import normalizeName from ~/lib/fuzzy-match instead of redefining it locally
https://claude.ai/code/session_01WZ6FjMmC2eBeZ1564M9Ruz
* Fix lint failures: unused vars, eqeqeq, toSorted
- Remove unused seededSet/unseededSet variables in test
- Replace != null with !== null && !== undefined (eqeqeq rule)
- Replace .sort() with .toSorted() in simulator and route (unicorn/no-array-sort)
https://claude.ai/code/session_01WZ6FjMmC2eBeZ1564M9Ruz
* Fix TS2552: restore seededSet declaration removed during lint fix
https://claude.ai/code/session_01WZ6FjMmC2eBeZ1564M9Ruz
---------
Co-authored-by: Claude <noreply@anthropic.com>
* Add FIFA World Cup 2026 support with group stage display and Monte Carlo simulator, fixes#127
- New `groupStageMatches` table for recording group play results (W/D/L, scores, matchday, schedule)
- `computeGroupStandings()` model function: pts → GD → GF → name tiebreaker ordering
- `GroupStageStandings` component showing all 12 groups with standings table and manager column
- Admin bracket UI: group match score entry, per-group standings, "Recalculate Floors" action
- `WorldCupSimulator`: 50k Monte Carlo covering group stage + best-8 3rd-place + knockout + 3rd place game
- Fuzzy name matching for national team Elo lookup (exact → substring → word-overlap), warns on miss
- Partial group completion: completed matches replayed with real scores, remaining matches simulated
- Elo priority: admin-entered sourceElo > futures odds converted to Elo > hardcoded national team ratings
- `fifa_48` bracket template: added Third Place Game round with `loserFeedsInto` on Semifinals
- Scoring rules: distinct 3rd/4th place for `fifa_48` (not averaged), QF losers share 5th–8th equally
- Floor scoring: SF participants guaranteed 4th (provisional), finalized after 3rd place game
- `recalculate-floors` admin action deletes and replays all results from scratch (fixes stale guard bug)
- Unique index on `(tournamentGroupId, participant1Id, participant2Id)` to prevent duplicate pairings
- Batch `findMatchesByGroupIds()` replacing N sequential queries in the sport season loader
- League home mini-standings now shows `actualPoints` (includes floor) instead of `totalPoints` only
- Elo ratings admin page supports World Cup (same bulk-import flow as snooker)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Fix TypeScript errors: update GroupStandingData type to use findMatchesByGroupIds
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Increase Node heap to 4GB for unit tests in CI to prevent OOM
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Fix OOM in CI: make WorldCupSimulator simulation count configurable for tests
Tests now pass numSimulations=500 instead of the production default of 50,000.
Six simulator tests × 50k iterations each was exhausting the 4GB heap on GitHub
Actions runners. Also reduce simGroupMatch stat tests from 50k to 5k iterations.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
* Add oxlint and fix all lint errors
- Install oxlint, add .oxlintrc.json with rules for TypeScript/React
- Add npm run lint / lint:fix scripts
- Add Claude PostToolUse hook to run oxlint on every edited file
- Fix 101 errors: unused vars/imports, eqeqeq, prefer-const, no-new-array
- Fix no-array-index-key (use stable keys or suppress positional cases)
- Fix exhaustive-deps missing dependency in useEffect
- Promote exhaustive-deps and no-array-index-key to errors
- Fix Map.get() !== null bug in $leagueId.server.ts (should be !== undefined)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Fix no-explicit-any warnings and upgrade tsconfig to ES2023
- Replace all `any` types with proper types or `unknown` across ~20 files
- Add typed socket payload interfaces in draft route and useDraftSocket
- Use any[] with eslint-disable for socket.io callbacks (legitimate escape hatch)
- Bump all tsconfigs from ES2022 → ES2023 to support toSorted/toReversed
- Fix cascading type errors uncovered by removing any: Map.get narrowing,
participant relation types, ChartDataPoint, Partial<NewSeason> indexing
- Add ParticipantResultWithParticipant type to participant-result model
- Fix test fixtures to match updated interfaces (DraftCell, ParticipantResult)
- Fix duplicate getQPStandings import in sportsSeasonId.server.ts
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
* Promote no-explicit-any to error
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
---------
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Use bracket template's canonical round order instead of sorting by match
count, which placed First Four (4 matches) after Elite Eight (also 4
matches). Extract getOrderedRoundsFromMatches() into bracket-templates.ts
to eliminate identical logic duplicated in the admin bracket component.
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Replaces the hardcoded 2026 Men's region structure with a per-event
configurable system so the same ncaa_68 template works for Women's
March Madness (different region names and play-in placements each year).
- Add `bracket_region_config jsonb` column to `scoring_events`
- Export `ALL_16_SEEDS` and `BracketRegion`/`BracketPlayIn` interfaces
from bracket-templates.ts so both server and client share the type
- Admin bracket entry form now shows a "Configure Regions" section:
editable region names + add/remove play-in seed selectors (ShadCN
Select) per region; slot map updates live as config changes
- Server action parses region config from form, validates total = 68,
stores it on the event, and passes it to bracket generation
- `advanceFirstFourWinner` reads stored `bracketRegionConfig` from the
event row first, falls back to template.regions for existing events
- Fix opponentSeed formula (was `seedNum <= 8 ? 17-n : n`, always `17-n`)
- Remove duplicate ALL_SEEDS inline definitions (now a shared constant)
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add FIFA_48 bracket template with 12 groups of 4, knockout stage of 32
- Add tournament groups schema, model, and GroupStageDisplay component
- Add projected/expected value scoring to standings and team breakdowns
- Add docker-compose for local PostgreSQL development
- Move DRAFT_ORDER_IMPLEMENTATION.md to plans directory
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
