claude.md

• Run npm run dev in background if the dev server is not already running.
• When committing, first run npx tsc && npx vite build to test changes and fix any errors.
• Any one-off scripts go into data-processing folder.
• Do NOT run npx tsc && npx vite build unless expicitly asked.

Testing

• Tests are in /tests folder (centralized structure mirroring /src)
• Run: npm test (watch mode) or npm run test:run (single run)
• Coverage: npm run test:coverage (target: 80%+)