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Agents

Cursor Cloud specific instructions

This is a React (Create React App) single-page application with no backend. All game state is stored in browser localStorage.

Running the dev server

source ~/.nvm/nvm.sh && nvm use 16
npm start        # starts on port 3000

Node 16 is required — react-scripts@2.1.3 does not work on Node 18+. nvm is preconfigured with Node 16 as the default.

Key commands

Task Command
Dev server npm start
Lint npx eslint src/
Build npm run build
Test CI=true npm test (no test files exist in the repo — in-app testing uses Jasmine in the browser)

Gotchas

  • The app makes a fire-and-forget fetch to localhost:9292 on mount and a WebSocket connection to an external ngrok address. Both fail silently and do not affect functionality.
  • index.html loads jQuery and toastr from CDNs over http://; if the dev server is accessed over HTTPS, mixed-content blocking may suppress toast notifications.
  • There are pre-existing ESLint warnings/errors in the codebase (unused vars, == instead of ===, etc.). These do not block the build.