.eslintrc.json

{
	"plugins": ["@typescript-eslint"],
	"parserOptions": {
		"project": "tsconfig.json"
	},
	"extends": [
		"plugin:@typescript-eslint/recommended",
		"plugin:@typescript-eslint/recommended-requiring-type-checking",
		"next",
		"next/core-web-vitals",
		"prettier"
	],
	"rules": {
		// sort imports
		"import/order": [
			"error",
			{
				"pathGroups": [
					{
						"pattern": "@/**",
						"group": "internal",
						"position": "before"
					}
				],
				"groups": [
					"builtin",
					"external",
					"internal",
					"unknown",
					"parent",
					"sibling",
					"index",
					"object",
					"type"
				],
				"newlines-between": "always",
				"alphabetize": {
					"order": "asc",
					"caseInsensitive": true
				}
			}
		],
		// no let exports
		"import/no-mutable-exports": "error",
		"import/no-cycle": "error",
		"import/no-default-export": "error",
		// allow {} even though it's unsafe but comes handy
		"@typescript-eslint/ban-types": [
			"error",
			{
				"types": {
					"{}": false
				}
			}
		],
		"@typescript-eslint/consistent-type-imports": [
			"error",
			{
				"prefer": "type-imports",
				"fixStyle": "inline-type-imports",
				"disallowTypeAnnotations": false
			}
		],
		"import/no-duplicates": [
			"error",
			{
				"prefer-inline": true
			}
		],
		// false negatives
		"import/namespace": ["off"],
		// we allow empty interfaces
		"no-empty-pattern": "off",
		"@typescript-eslint/no-empty-interface": "off",
		// we allow empty functions
		"@typescript-eslint/no-empty-function": "off",
		// we sometimes use async functions that don't await anything
		"@typescript-eslint/require-await": "off",
		// make sure to `await` inside try…catch
		"@typescript-eslint/return-await": ["error", "in-try-catch"],
		// allow unused vars prefixed with `_`
		"@typescript-eslint/no-unused-vars": [
			"error",
			{
				"argsIgnorePattern": "^_",
				"varsIgnorePattern": "^_"
			}
		],
		// numbers and booleans are fine in template strings
		"@typescript-eslint/restrict-template-expressions": [
			"error",
			{
				"allowNumber": true,
				"allowBoolean": true
			}
		],
		// forbid restricted imports
		"no-restricted-imports": [
			"error",
			{
				"name": "next/router",
				"message": "Please use next/navigation instead."
			}
		],
		"@typescript-eslint/no-misused-promises": [
			"error",
			{
				"checksVoidReturn": {
					"attributes": false
				}
			}
		]
	},
	"overrides": [
		{
			"files": ["src/app/**/*.ts?(x)"],
			"rules": {
				"import/no-default-export": "off"
			}
		}
	]
}