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Claude 1bd23a4419
Add LLWS 20-team double-elimination bracket
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
2026-08-03 18:06:56 +00:00
.claude Paginate and sport-tailor the simulator setup participant table (#132) 2026-07-07 06:00:15 +00:00
.forgejo/workflows Debug sync-and-simulate cron job: surface curl output and log auth failures 2026-06-10 16:50:30 +00:00
.opencode/plugins Add opencode oxlint plugin and UI refinements (#323) 2026-04-24 11:11:20 -07:00
.production-info Fix draft timer: broadcasts, increments, reconnect sync, overnight pause (#72) 2026-06-06 05:57:46 +00:00
.storybook New design (#309) 2026-04-23 13:14:55 -07:00
.vscode feat: add Sentry error monitoring (#132) 2026-03-10 23:35:33 -07:00
app Add LLWS 20-team double-elimination bracket 2026-08-03 18:06:56 +00:00
cypress Fix oxlint warnings: no-shadow, consistent-function-scoping, no-non-null-assertion, and others (#196) 2026-03-21 10:59:51 -07:00
database Auto-populate & auto-score tennis Grand Slam brackets from Wikipedia 2026-06-26 21:48:00 -07:00
docs claude/great-lovelace-r3bznh (#88) 2026-06-12 22:35:35 +00:00
drizzle Auto-populate & auto-score tennis Grand Slam brackets from Wikipedia 2026-06-26 21:48:00 -07:00
plans Fix draft timer: broadcasts, increments, reconnect sync, overnight pause (#72) 2026-06-06 05:57:46 +00:00
public Fix robots.txt and sitemap issues from code review 2026-05-24 22:16:49 -07:00
scripts claude/wimbledon-qp-scoring-bug-xevhlf (#127) 2026-07-03 21:40:11 +00:00
server Phase A: external HTTP cron jobs for snapshots, standings sync, and simulation (#79) 2026-06-08 07:42:14 +00:00
test-fixtures/baselines chore: capture pre-migration baselines 2026-04-30 23:09:24 -07:00
.dockerignore Optimize CI pipeline: merge check jobs, remove docker install, improve layer caching 2026-05-31 21:37:01 -07:00
.env.example Sync IndyCar standings from OC Blacktop, fall back to ESPN 2026-07-06 21:20:47 -07:00
.gitignore Fix robots.txt and sitemap issues from code review 2026-05-24 22:16:49 -07:00
.npmrc Migrate authentication from Clerk to BetterAuth (#324) 2026-04-24 22:00:49 -07:00
.nvmrc Optimize GitHub Actions CI/CD pipeline (#252) 2026-04-01 00:59:21 -07:00
.oxlintrc.json Replace console.* with structured logger, fix no-inferrable-types (closes #98) (#199) 2026-03-21 13:41:39 -07:00
AGENTS.md Docs update 2026-05-04 09:33:13 -07:00
BETTERAUTH_MIGRATION.md Migrate authentication from Clerk to BetterAuth (#324) 2026-04-24 22:00:49 -07:00
CLAUDE.md Docs update 2026-05-04 09:33:13 -07:00
components.json feat: add theme system with dark mode support and navbar component 2025-10-10 23:30:26 -07:00
cypress.config.js ci: add test job to GitHub workflow and setup testing dependencies 2025-10-21 12:47:11 -07:00
docker-compose.yml feat: add FIFA World Cup 48-team bracket template with group stage and projected scoring 2026-02-14 22:30:12 -08:00
Dockerfile Fix Docker build: copy root server.ts into build-env stage 2026-05-31 21:56:17 -07:00
drizzle.config.ts Add PgBouncer connection pooling support for Vultr managed PostgreSQL (#271) 2026-04-06 17:15:18 -04:00
instrument.server.mjs Block bot probe requests before routing (#444) 2026-05-18 11:17:18 -07:00
oxlint.json Add oxlint config and fix unicorn/no-array-sort violation 2026-05-21 17:01:02 -07:00
package-lock.json Add Cloudinary-backed avatar system (#385) 2026-05-06 14:47:37 -07:00
package.json Add robots.txt and sitemap.xml.gz for SEO 2026-05-24 22:05:37 -07:00
plan.md Add implementation plan for commissioner-without-team feature (#6) 2026-02-20 08:45:09 -08:00
react-router.config.ts Add oxlint linting setup with zero errors (#194) 2026-03-21 09:44:05 -07:00
README.md Initial commit from create-react-router 2025-10-10 23:04:50 -07:00
server.ts Decouple database migrations from server startup (#265) 2026-04-06 00:07:36 -04:00
TESTING.md ci: add test job to GitHub workflow and setup testing dependencies 2025-10-21 12:47:11 -07:00
tsconfig.json refactor: update import paths to use absolute paths for better clarity and maintainability 2025-10-24 21:20:19 -07:00
tsconfig.node.json Add oxlint linting setup with zero errors (#194) 2026-03-21 09:44:05 -07:00
tsconfig.server.json Add oxlint linting setup with zero errors (#194) 2026-03-21 09:44:05 -07:00
tsconfig.vite.json Add oxlint linting setup with zero errors (#194) 2026-03-21 09:44:05 -07:00
vite.config.ts New design (#309) 2026-04-23 13:14:55 -07:00
vitest.config.ts Remove flaky context menu click tests (#81) 2026-06-10 05:59:49 +00:00
vitest.shims.d.ts Install Storybook with React Router Vite plugin fix, closes #229 (#243) 2026-03-29 15:20:48 -07:00

Welcome to React Router!

A modern, production-ready template for building full-stack React applications using React Router.

Features

  • 🚀 Server-side rendering
  • Hot Module Replacement (HMR)
  • 📦 Asset bundling and optimization
  • 🔄 Data loading and mutations
  • 🔒 TypeScript by default
  • 🎉 TailwindCSS for styling
  • 💾 PostgreSQL + DrizzleORM
  • 📖 React Router docs

Getting Started

Installation

Install the dependencies:

npm install

Development

Copy .env.example to .env and provide a DATABASE_URL with your connection string.

Run an initial database migration:

npm run db:migrate

Start the development server with HMR:

npm run dev

Your application will be available at http://localhost:5173.

Building for Production

Create a production build:

npm run build

Deployment

Docker Deployment

To build and run using Docker:

# For npm
docker build -t my-app .

# Run the container
docker run -p 3000:3000 my-app

The containerized application can be deployed to any platform that supports Docker, including:

  • AWS ECS
  • Google Cloud Run
  • Azure Container Apps
  • Digital Ocean App Platform
  • Fly.io
  • Railway

DIY Deployment

If you're familiar with deploying Node applications, the built-in app server is production-ready.

Make sure to deploy the output of npm run build

├── package.json
├── package-lock.json (or pnpm-lock.yaml, or bun.lockb)
├── server.js
├── build/
│   ├── client/    # Static assets
│   └── server/    # Server-side code

Styling

This template comes with Tailwind CSS already configured for a simple default starting experience. You can use whatever CSS framework you prefer.


Built with ❤️ using React Router.