How to reuse shared utilities with Cursor

1// packages/shared/src/index.ts
2
3// String utilities
4export { capitalize, slugify, truncate } from './string';
5
6// Date utilities
7export { formatDate, parseISO, daysBetween } from './date';
8
9// Validation utilities
10export { isEmail, isURL, isUUID } from './validation';
11
12// HTTP utilities
13export { fetchWithRetry, buildQueryString } from './http';
14
15// Type guards
16export { isNonNull, isString, isNumber } from './guards';

1---
2description: Import rules for apps/web package
3globs: "apps/web/src/**/*.{ts,tsx}"
4alwaysApply: true
5---
6
7## Shared Utilities
8- ALWAYS check @packages/shared/src/index.ts before creating utility functions
9- Import shared utilities with: import { fn } from '@myorg/shared'
10- NEVER duplicate functions that already exist in packages/shared
11- Available shared utilities: capitalize, slugify, truncate, formatDate,
12  parseISO, daysBetween, isEmail, isURL, isUUID, fetchWithRetry,
13  buildQueryString, isNonNull, isString, isNumber
14
15## Import Paths
16- Shared package: @myorg/shared
17- UI components: @myorg/ui
18- Config: @myorg/config

1// Cursor Chat prompt (Cmd+L):
2// @packages/shared/src/index.ts
3// @packages/shared/src/validation.ts
4// Create a registration form handler in apps/web that
5// validates email and URL inputs. Use the validation
6// functions from our shared package instead of writing
7// new ones.

1# .cursorignore (project root)
2node_modules/
3dist/
4build/
5.next/
6coverage/
7*.log
8
9# Exclude packages you never work on
10# packages/legacy-api/
11# packages/deprecated-ui/

1// Composer prompt (Cmd+I):
2// @packages/shared/src/index.ts Generate a new API route
3// at apps/api/src/routes/users.ts that:
4// 1. Validates email input using shared utilities
5// 2. Slugifies the username using shared utilities
6// 3. Formats dates using shared utilities
7// Import all utilities from @myorg/shared. Do not create
8// any new utility functions.