CORE-1.2: Configure ESLint for Code Linting

Ticket ID: CORE-1.2
Milestone: 1 - Project Initialization & Code Quality
Priority: 🔴 Critical
Status: Not Started

Description

Install and configure ESLint to statically analyze code and find problems. This ensures code quality and catches common errors early in the development process.

Context

Code quality is essential for maintaining a professional codebase. ESLint will help enforce consistent coding standards across the team and catch potential bugs before they reach production.

Acceptance Criteria

  1. ✅ An .eslintrc.json configuration file is created and committed
  2. ✅ Recommended rule sets (e.g., eslint:recommended, plugin:@typescript-eslint/recommended) are enabled
  3. ✅ An npm run lint script is added to package.json that runs ESLint across the entire project
  4. ✅ ESLint runs without errors on the initial Next.js project files
  5. ✅ ESLint configuration is compatible with Next.js 15 and TypeScript

Technical Details

Required Packages

  • eslint
  • eslint-config-next (Next.js ESLint config)
  • @typescript-eslint/eslint-plugin
  • @typescript-eslint/parser

Configuration Approach

  • Use Next.js’s built-in ESLint configuration as the base
  • Extend with TypeScript-specific rules
  • Configure for App Router structure

Implementation Notes

  • Next.js 15 includes ESLint by default, but we should verify and enhance the configuration
  • Ensure TypeScript-specific rules are properly configured
  • Set up appropriate ignore patterns for build artifacts and dependencies
  • Consider adding React-specific rules if needed

Dependencies

  • CORE-1.1 - Next.js project must be initialized first

Testing

  • Run npm run lint and verify it executes without errors
  • Introduce a linting error (e.g., unused variable) and verify ESLint catches it
  • Verify ESLint works with TypeScript files
  • Confirm ESLint ignores appropriate files (node_modules, .next, etc.)