build: split into monorepo with separate packages

.all-contributorsrc

@@ -0,0 +1,32 @@
+{
+	"badgeTemplate": "<img alt=\"All Contributors: <%= contributors.length %> 🤝\" src=\"https://img.shields.io/badge/all_contributors-<%= contributors.length %>_🤝-21bb42.svg\" />",
+	"commit": false,
+	"commitConvention": "angular",
+	"contributors": [
+		{
+			"avatar_url": "https://avatars.githubusercontent.com/u/3335181?v=4",
+			"contributions": [
+				"bug",
+				"code",
+				"maintenance",
+				"review",
+				"tool",
+				"doc",
+				"infra",
+				"test"
+			],
+			"login": "JoshuaKGoldberg",
+			"name": "Josh Goldberg",
+			"profile": "http://www.joshuakgoldberg.com"
+		}
+	],
+	"contributorsPerLine": 7,
+	"contributorsSortAlphabetically": true,
+	"files": ["README.md"],
+	"imageSize": 100,
+	"projectName": "create-typescript-app",
+	"projectOwner": "JoshuaKGoldberg",
+	"repoHost": "https://github.com",
+	"repoType": "github",
+	"commitType": "docs"
+}

.eslintignore

@@ -1,2 +1,4 @@
-**/*.d.ts
-test/cases/
+!.*
+node_modules
+packages/ts-enhance/test/cases/
+pnpm-lock.yaml

.eslintrc.js

@@ -1,13 +1,168 @@
+/** @type {import("@types/eslint").Linter.Config} */
 module.exports = {
-    extends: ["eslint:recommended", "plugin:@typescript-eslint/strict-type-checked", "plugin:@typescript-eslint/stylistic-type-checked"],
-    parser: "@typescript-eslint/parser",
-    parserOptions: {
-        project: "tsconfig.eslint.json",
-        sourceType: "module",
-    },
-    plugins: ["deprecation", "no-only-tests"],
-    rules: {
-        "deprecation/deprecation": "error",
-        "no-only-tests/no-only-tests": "error",
-    },
+	env: {
+		es2022: true,
+		node: true,
+	},
+	extends: [
+		"eslint:recommended",
+		"plugin:eslint-comments/recommended",
+		"plugin:n/recommended",
+		"plugin:perfectionist/recommended-natural",
+		"plugin:regexp/recommended",
+		"plugin:vitest/recommended",
+		"prettier",
+	],
+	overrides: [
+		{
+			extends: ["plugin:markdown/recommended"],
+			files: ["**/*.md"],
+			processor: "markdown/markdown",
+		},
+		{
+			extends: [
+				"plugin:jsdoc/recommended-typescript-error",
+				"plugin:@typescript-eslint/strict",
+				"plugin:@typescript-eslint/stylistic",
+			],
+			files: ["**/*.ts"],
+			parser: "@typescript-eslint/parser",
+			rules: {
+				// These off-by-default rules work well for this repo and we like them on.
+				"jsdoc/informative-docs": "error",
+				"logical-assignment-operators": [
+					"error",
+					"always",
+					{ enforceForIfStatements: true },
+				],
+				"operator-assignment": "error",
+
+				// These on-by-default rules don't work well for this repo and we like them off.
+				"jsdoc/require-jsdoc": "off",
+				"jsdoc/require-param": "off",
+				"jsdoc/require-property": "off",
+				"jsdoc/require-returns": "off",
+			},
+		},
+		{
+			excludedFiles: ["**/*.md/*.ts"],
+			extends: [
+				"plugin:@typescript-eslint/strict-type-checked",
+				"plugin:@typescript-eslint/stylistic-type-checked",
+			],
+			files: ["**/*.ts"],
+			parser: "@typescript-eslint/parser",
+			parserOptions: {
+				project: "./tsconfig.eslint.json",
+			},
+			rules: {
+				// TODO: Investigate enabling these?
+				"@typescript-eslint/no-redundant-type-constituents": "off",
+				"@typescript-eslint/no-unsafe-argument": "off",
+				"@typescript-eslint/no-unsafe-assignment": "off",
+				"@typescript-eslint/no-unsafe-call": "off",
+				"@typescript-eslint/no-unsafe-member-access": "off",
+				"@typescript-eslint/no-unsafe-return": "off",
+				"@typescript-eslint/unbound-method": "off",
+
+				// These off-by-default rules work well for this repo and we like them on.
+				"deprecation/deprecation": "error",
+
+				// These more-strict-by-default rules don't work well for this repo and we like them less strict.
+				"@typescript-eslint/no-unnecessary-condition": [
+					"error",
+					{
+						allowConstantLoopConditions: true,
+					},
+				],
+			},
+		},
+		{
+			excludedFiles: ["package.json"],
+			extends: ["plugin:jsonc/recommended-with-json"],
+			files: ["*.json", "*.jsonc"],
+			parser: "jsonc-eslint-parser",
+			rules: {
+				"jsonc/sort-keys": "error",
+			},
+		},
+		{
+			files: ["*.jsonc"],
+			rules: {
+				"jsonc/no-comments": "off",
+			},
+		},
+		{
+			files: "**/*.test.ts",
+			rules: {
+				// These on-by-default rules aren't useful in test files.
+				"@typescript-eslint/no-unsafe-assignment": "off",
+				"@typescript-eslint/no-unsafe-call": "off",
+
+				// https://github.com/veritem/eslint-plugin-vitest/issues/247
+				"vitest/valid-title": "off",
+			},
+		},
+		{
+			extends: ["plugin:yml/standard", "plugin:yml/prettier"],
+			files: ["**/*.{yml,yaml}"],
+			parser: "yaml-eslint-parser",
+			rules: {
+				"yml/file-extension": ["error", { extension: "yml" }],
+				"yml/sort-keys": [
+					"error",
+					{
+						order: { type: "asc" },
+						pathPattern: "^.*$",
+					},
+				],
+				"yml/sort-sequence-values": [
+					"error",
+					{
+						order: { type: "asc" },
+						pathPattern: "^.*$",
+					},
+				],
+			},
+		},
+	],
+	parser: "@typescript-eslint/parser",
+	plugins: [
+		"@typescript-eslint",
+		"deprecation",
+		"import",
+		"jsdoc",
+		"no-only-tests",
+		"perfectionist",
+		"regexp",
+		"vitest",
+	],
+	reportUnusedDisableDirectives: true,
+	root: true,
+	rules: {
+		// These off/less-strict-by-default rules work well for this repo and we like them on.
+		"@typescript-eslint/no-unused-vars": ["error", { caughtErrors: "all" }],
+		"import/extensions": ["error", "ignorePackages"],
+		"no-only-tests/no-only-tests": "error",
+
+		// These on-by-default rules don't work well for this repo and we like them off.
+		"n/no-missing-import": "off",
+		"no-case-declarations": "off",
+		"no-constant-condition": "off",
+		"no-inner-declarations": "off",
+
+		// Stylistic concerns that don't interfere with Prettier
+		"@typescript-eslint/padding-line-between-statements": [
+			"error",
+			{ blankLine: "always", next: "*", prev: "block-like" },
+		],
+		"perfectionist/sort-objects": [
+			"error",
+			{
+				order: "asc",
+				"partition-by-comment": true,
+				type: "natural",
+			},
+		],
+	},
 };