Add CLOUD.md for cloud agent instructions (#76)

Co-authored-by: Cursor Agent <cursoragent@cursor.com>

Author: kentcdodds

.cursor/CLOUD.md

@@ -0,0 +1,38 @@
+# GratiText Cloud Agent Instructions
+
+## Quick Reference
+
+| Command | Description |
+|---------|-------------|
+| `npm run dev` | Start dev server with mocks (port 3000) |
+| `npm test` | Run Vitest unit tests |
+| `npm run test:e2e:run` | Run Playwright e2e tests |
+| `npm run lint` | ESLint |
+| `npm run typecheck` | TypeScript type checking |
+| `npm run validate` | Run all checks (tests, lint, typecheck, e2e) |
+
+## Development Mode
+
+Dev server runs with `MOCKS=true` which enables MSW mock server. No external services (Twilio, Stripe) needed for local development.
+
+## Mock Services
+
+When testing SMS flows, mock verification codes are stored in `/workspace/tests/fixtures/texts/`. Read the most recent JSON file to find verification codes.
+
+## Database
+
+SQLite database at `./prisma/sqlite.db`. Use `npx prisma studio` to browse data.
+
+## Testing
+
+- Unit tests: Vitest with browser testing via Playwright
+- E2E tests: Playwright with Chromium
+- Mock services enabled via MSW
+
+## Key Routes
+
+- `/` - Marketing homepage
+- `/login` - User login
+- `/signup` - Phone verification signup
+- `/recipients` - Dashboard (authenticated)
+- `/settings/profile` - User settings