diff --git a/conf/category-list.json b/conf/category-list.json
deleted file mode 100644
index cd3b816b..00000000
--- a/conf/category-list.json
+++ /dev/null
@@ -1,39 +0,0 @@
-{
-    "categories": [
-        { "name": "Possible Errors", "description": "These rules relate to possible syntax or logic errors in JavaScript code:" },
-        { "name": "Best Practices", "description": "These rules relate to better ways of doing things to help you avoid problems:" },
-        { "name": "Strict Mode", "description": "These rules relate to strict mode directives:" },
-        { "name": "Variables", "description": "These rules relate to variable declarations:" },
-        { "name": "Stylistic Issues", "description": "These rules relate to style guidelines, and are therefore quite subjective:" },
-        { "name": "ECMAScript 6", "description": "These rules relate to ES6, also known as ES2015:" }
-    ],
-    "deprecated": {
-        "name": "Deprecated",
-        "description": "These rules have been deprecated in accordance with the <a href=\"/docs/user-guide/rule-deprecation\">deprecation policy</a>, and replaced by newer rules:",
-        "rules": []
-    },
-    "removed": {
-        "name": "Removed",
-        "description": "These rules from older versions of ESLint (before the <a href=\"/docs/user-guide/rule-deprecation\">deprecation policy</a> existed) have been replaced by newer rules:",
-        "rules": [
-            { "removed": "generator-star", "replacedBy": ["generator-star-spacing"] },
-            { "removed": "global-strict", "replacedBy": ["strict"] },
-            { "removed": "no-arrow-condition", "replacedBy": ["no-confusing-arrow", "no-constant-condition"] },
-            { "removed": "no-comma-dangle", "replacedBy": ["comma-dangle"] },
-            { "removed": "no-empty-class", "replacedBy": ["no-empty-character-class"] },
-            { "removed": "no-empty-label", "replacedBy": ["no-labels"] },
-            { "removed": "no-extra-strict", "replacedBy": ["strict"] },
-            { "removed": "no-reserved-keys", "replacedBy": ["quote-props"] },
-            { "removed": "no-space-before-semi", "replacedBy": ["semi-spacing"] },
-            { "removed": "no-wrap-func", "replacedBy": ["no-extra-parens"] },
-            { "removed": "space-after-function-name", "replacedBy": ["space-before-function-paren"] },
-            { "removed": "space-after-keywords", "replacedBy": ["keyword-spacing"] },
-            { "removed": "space-before-function-parentheses", "replacedBy": ["space-before-function-paren"] },
-            { "removed": "space-before-keywords", "replacedBy": ["keyword-spacing"] },
-            { "removed": "space-in-brackets", "replacedBy": ["object-curly-spacing", "array-bracket-spacing"] },
-            { "removed": "space-return-throw-case", "replacedBy": ["keyword-spacing"] },
-            { "removed": "space-unary-word-ops", "replacedBy": ["space-unary-ops"] },
-            { "removed": "spaced-line-comment", "replacedBy": ["spaced-comment"] }
-        ]
-    }
-}
diff --git a/conf/default-cli-options.js b/conf/default-cli-options.js
deleted file mode 100644
index e09a829d..00000000
--- a/conf/default-cli-options.js
+++ /dev/null
@@ -1,31 +0,0 @@
-/**
- * @fileoverview Default CLIEngineOptions.
- * @author Ian VanSchooten
- */
-
-"use strict";
-
-module.exports = {
-    configFile: null,
-    baseConfig: false,
-    rulePaths: [],
-    useEslintrc: true,
-    envs: [],
-    globals: [],
-    extensions: null,
-    ignore: true,
-    ignorePath: void 0,
-    cache: false,
-
-    /*
-     * in order to honor the cacheFile option if specified
-     * this option should not have a default value otherwise
-     * it will always be used
-     */
-    cacheLocation: "",
-    cacheFile: ".eslintcache",
-    fix: false,
-    allowInlineConfig: true,
-    reportUnusedDisableDirectives: void 0,
-    globInputPaths: true
-};
diff --git a/conf/eslint-all.js b/conf/eslint-all.js
deleted file mode 100644
index cdd8a3e4..00000000
--- a/conf/eslint-all.js
+++ /dev/null
@@ -1,32 +0,0 @@
-/**
- * @fileoverview Config to enable all rules.
- * @author Robert Fletcher
- */
-
-"use strict";
-
-//------------------------------------------------------------------------------
-// Requirements
-//------------------------------------------------------------------------------
-
-// FIXME: "../lib/rules" doesn't exist in this package
-const builtInRules = require("../lib/rules");
-
-//------------------------------------------------------------------------------
-// Helpers
-//------------------------------------------------------------------------------
-
-const allRules = {};
-
-for (const [ruleId, rule] of builtInRules) {
-    if (!rule.meta.deprecated) {
-        allRules[ruleId] = "error";
-    }
-}
-
-//------------------------------------------------------------------------------
-// Public Interface
-//------------------------------------------------------------------------------
-
-/** @type {import("../lib/shared/types").ConfigData} */
-module.exports = { rules: allRules };
diff --git a/conf/eslint-recommended.js b/conf/eslint-recommended.js
deleted file mode 100644
index 2137685f..00000000
--- a/conf/eslint-recommended.js
+++ /dev/null
@@ -1,72 +0,0 @@
-/**
- * @fileoverview Configuration applied when a user configuration extends from
- * eslint:recommended.
- * @author Nicholas C. Zakas
- */
-
-"use strict";
-
-/* eslint sort-keys: ["error", "asc"] */
-
-/** @type {import("../lib/shared/types").ConfigData} */
-module.exports = {
-    rules: {
-        "constructor-super": "error",
-        "for-direction": "error",
-        "getter-return": "error",
-        "no-async-promise-executor": "error",
-        "no-case-declarations": "error",
-        "no-class-assign": "error",
-        "no-compare-neg-zero": "error",
-        "no-cond-assign": "error",
-        "no-const-assign": "error",
-        "no-constant-condition": "error",
-        "no-control-regex": "error",
-        "no-debugger": "error",
-        "no-delete-var": "error",
-        "no-dupe-args": "error",
-        "no-dupe-class-members": "error",
-        "no-dupe-else-if": "error",
-        "no-dupe-keys": "error",
-        "no-duplicate-case": "error",
-        "no-empty": "error",
-        "no-empty-character-class": "error",
-        "no-empty-pattern": "error",
-        "no-ex-assign": "error",
-        "no-extra-boolean-cast": "error",
-        "no-extra-semi": "error",
-        "no-fallthrough": "error",
-        "no-func-assign": "error",
-        "no-global-assign": "error",
-        "no-import-assign": "error",
-        "no-inner-declarations": "error",
-        "no-invalid-regexp": "error",
-        "no-irregular-whitespace": "error",
-        "no-misleading-character-class": "error",
-        "no-mixed-spaces-and-tabs": "error",
-        "no-new-symbol": "error",
-        "no-obj-calls": "error",
-        "no-octal": "error",
-        "no-prototype-builtins": "error",
-        "no-redeclare": "error",
-        "no-regex-spaces": "error",
-        "no-self-assign": "error",
-        "no-setter-return": "error",
-        "no-shadow-restricted-names": "error",
-        "no-sparse-arrays": "error",
-        "no-this-before-super": "error",
-        "no-undef": "error",
-        "no-unexpected-multiline": "error",
-        "no-unreachable": "error",
-        "no-unsafe-finally": "error",
-        "no-unsafe-negation": "error",
-        "no-unused-labels": "error",
-        "no-unused-vars": "error",
-        "no-useless-catch": "error",
-        "no-useless-escape": "error",
-        "no-with": "error",
-        "require-yield": "error",
-        "use-isnan": "error",
-        "valid-typeof": "error"
-    }
-};
diff --git a/conf/replacements.json b/conf/replacements.json
deleted file mode 100644
index c047811e..00000000
--- a/conf/replacements.json
+++ /dev/null
@@ -1,22 +0,0 @@
-{
-    "rules": {
-        "generator-star": ["generator-star-spacing"],
-        "global-strict": ["strict"],
-        "no-arrow-condition": ["no-confusing-arrow", "no-constant-condition"],
-        "no-comma-dangle": ["comma-dangle"],
-        "no-empty-class": ["no-empty-character-class"],
-        "no-empty-label": ["no-labels"],
-        "no-extra-strict": ["strict"],
-        "no-reserved-keys": ["quote-props"],
-        "no-space-before-semi": ["semi-spacing"],
-        "no-wrap-func": ["no-extra-parens"],
-        "space-after-function-name": ["space-before-function-paren"],
-        "space-after-keywords": ["keyword-spacing"],
-        "space-before-function-parentheses": ["space-before-function-paren"],
-        "space-before-keywords": ["keyword-spacing"],
-        "space-in-brackets": ["object-curly-spacing", "array-bracket-spacing", "computed-property-spacing"],
-        "space-return-throw-case": ["keyword-spacing"],
-        "space-unary-word-ops": ["space-unary-ops"],
-        "spaced-line-comment": ["spaced-comment"]
-    }
-}
diff --git a/lib/cascading-config-array-factory.js b/lib/cascading-config-array-factory.js
index a6933964..5f0da057 100644
--- a/lib/cascading-config-array-factory.js
+++ b/lib/cascading-config-array-factory.js
@@ -36,9 +36,10 @@ const debug = require("debug")("eslintrc:cascading-config-array-factory");
 //------------------------------------------------------------------------------
 
 // Define types for VSCode IntelliSense.
-/** @typedef {import("../shared/types").ConfigData} ConfigData */
-/** @typedef {import("../shared/types").Parser} Parser */
-/** @typedef {import("../shared/types").Plugin} Plugin */
+/** @typedef {import("./shared/types").ConfigData} ConfigData */
+/** @typedef {import("./shared/types").Parser} Parser */
+/** @typedef {import("./shared/types").Plugin} Plugin */
+/** @typedef {import("./shared/types").Rule} Rule */
 /** @typedef {ReturnType<ConfigArrayFactory["create"]>} ConfigArray */
 
 /**
@@ -51,6 +52,11 @@ const debug = require("debug")("eslintrc:cascading-config-array-factory");
  * @property {string[]} [rulePaths] The value of `--rulesdir` option.
  * @property {string} [specificConfigPath] The value of `--config` option.
  * @property {boolean} [useEslintrc] if `false` then it doesn't load config files.
+ * @property {Function} loadRules The function to use to load rules.
+ * @property {Map<string,Rule>} builtInRules The rules that are built in to ESLint.
+ * @property {Object} [resolver=ModuleResolver] The module resolver object.
+ * @property {string} eslintAllPath The path to the definitions for eslint:all.
+ * @property {string} eslintRecommendedPath The path to the definitions for eslint:recommended.
  */
 
 /**
@@ -67,6 +73,11 @@ const debug = require("debug")("eslintrc:cascading-config-array-factory");
  * @property {string[]|null} rulePaths The value of `--rulesdir` option. This is used to reset `baseConfigArray`.
  * @property {string|null} specificConfigPath The value of `--config` option. This is used to reset `cliConfigArray`.
  * @property {boolean} useEslintrc if `false` then it doesn't load config files.
+ * @property {Function} loadRules The function to use to load rules.
+ * @property {Map<string,Rule>} builtInRules The rules that are built in to ESLint.
+ * @property {Object} [resolver=ModuleResolver] The module resolver object.
+ * @property {string} eslintAllPath The path to the definitions for eslint:all.
+ * @property {string} eslintRecommendedPath The path to the definitions for eslint:recommended.
  */
 
 /** @type {WeakMap<CascadingConfigArrayFactory, CascadingConfigArrayFactoryInternalSlots>} */
@@ -205,14 +216,18 @@ class CascadingConfigArrayFactory {
         useEslintrc = true,
         builtInRules = new Map(),
         loadRules,
-        resolver
+        resolver,
+        eslintRecommendedPath,
+        eslintAllPath
     } = {}) {
         const configArrayFactory = new ConfigArrayFactory({
             additionalPluginPool,
             cwd,
             resolvePluginsRelativeTo,
             builtInRules,
-            resolver
+            resolver,
+            eslintRecommendedPath,
+            eslintAllPath
         });
 
         internalSlotsMap.set(this, {
diff --git a/lib/config-array-factory.js b/lib/config-array-factory.js
index 97f8b5cb..6494a041 100644
--- a/lib/config-array-factory.js
+++ b/lib/config-array-factory.js
@@ -58,8 +58,6 @@ const debug = require("debug")("eslintrc:config-array-factory");
 // Helpers
 //------------------------------------------------------------------------------
 
-const eslintRecommendedPath = path.resolve(__dirname, "../../eslint/conf/eslint-recommended.js");
-const eslintAllPath = path.resolve(__dirname, "../../eslint/conf/eslint-all.js");
 const configFilenames = [
     ".eslintrc.js",
     ".eslintrc.cjs",
@@ -71,10 +69,11 @@ const configFilenames = [
 ];
 
 // Define types for VSCode IntelliSense.
-/** @typedef {import("../shared/types").ConfigData} ConfigData */
-/** @typedef {import("../shared/types").OverrideConfigData} OverrideConfigData */
-/** @typedef {import("../shared/types").Parser} Parser */
-/** @typedef {import("../shared/types").Plugin} Plugin */
+/** @typedef {import("./shared/types").ConfigData} ConfigData */
+/** @typedef {import("./shared/types").OverrideConfigData} OverrideConfigData */
+/** @typedef {import("./shared/types").Parser} Parser */
+/** @typedef {import("./shared/types").Plugin} Plugin */
+/** @typedef {import("./shared/types").Rule} Rule */
 /** @typedef {import("./config-array/config-dependency").DependentParser} DependentParser */
 /** @typedef {import("./config-array/config-dependency").DependentPlugin} DependentPlugin */
 /** @typedef {ConfigArray[0]} ConfigArrayElement */
@@ -84,6 +83,10 @@ const configFilenames = [
  * @property {Map<string,Plugin>} [additionalPluginPool] The map for additional plugins.
  * @property {string} [cwd] The path to the current working directory.
  * @property {string} [resolvePluginsRelativeTo] A path to the directory that plugins should be resolved from. Defaults to `cwd`.
+ * @property {Map<string,Rule>} builtInRules The rules that are built in to ESLint.
+ * @property {Object} [resolver=ModuleResolver] The module resolver object.
+ * @property {string} eslintAllPath The path to the definitions for eslint:all.
+ * @property {string} eslintRecommendedPath The path to the definitions for eslint:recommended.
  */
 
 /**
@@ -91,6 +94,10 @@ const configFilenames = [
  * @property {Map<string,Plugin>} additionalPluginPool The map for additional plugins.
  * @property {string} cwd The path to the current working directory.
  * @property {string | undefined} resolvePluginsRelativeTo An absolute path the the directory that plugins should be resolved from.
+ * @property {Map<string,Rule>} builtInRules The rules that are built in to ESLint.
+ * @property {Object} [resolver=ModuleResolver] The module resolver object.
+ * @property {string} eslintAllPath The path to the definitions for eslint:all.
+ * @property {string} eslintRecommendedPath The path to the definitions for eslint:recommended.
  */
 
 /**
@@ -414,7 +421,9 @@ class ConfigArrayFactory {
         cwd = process.cwd(),
         resolvePluginsRelativeTo,
         builtInRules,
-        resolver = ModuleResolver
+        resolver = ModuleResolver,
+        eslintAllPath,
+        eslintRecommendedPath
     } = {}) {
         internalSlotsMap.set(this, {
             additionalPluginPool,
@@ -423,7 +432,9 @@ class ConfigArrayFactory {
                 resolvePluginsRelativeTo &&
                 path.resolve(cwd, resolvePluginsRelativeTo),
             builtInRules,
-            resolver
+            resolver,
+            eslintAllPath,
+            eslintRecommendedPath
         });
     }
 
@@ -781,6 +792,8 @@ class ConfigArrayFactory {
      * @private
      */
     _loadExtendedBuiltInConfig(extendName, ctx) {
+        const { eslintAllPath, eslintRecommendedPath } = internalSlotsMap.get(this);
+
         if (extendName === "eslint:recommended") {
             return this._loadConfigData({
                 ...ctx,
diff --git a/lib/shared/types.js b/lib/shared/types.js
new file mode 100644
index 00000000..d4ac14e2
--- /dev/null
+++ b/lib/shared/types.js
@@ -0,0 +1,150 @@
+/**
+ * @fileoverview Define common types for input completion.
+ * @author Toru Nagashima <https://github.com/mysticatea>
+ */
+"use strict";
+
+/** @type {any} */
+module.exports = {};
+
+/** @typedef {boolean | "off" | "readable" | "readonly" | "writable" | "writeable"} GlobalConf */
+/** @typedef {0 | 1 | 2 | "off" | "warn" | "error"} SeverityConf */
+/** @typedef {SeverityConf | [SeverityConf, ...any[]]} RuleConf */
+
+/**
+ * @typedef {Object} EcmaFeatures
+ * @property {boolean} [globalReturn] Enabling `return` statements at the top-level.
+ * @property {boolean} [jsx] Enabling JSX syntax.
+ * @property {boolean} [impliedStrict] Enabling strict mode always.
+ */
+
+/**
+ * @typedef {Object} ParserOptions
+ * @property {EcmaFeatures} [ecmaFeatures] The optional features.
+ * @property {3|5|6|7|8|9|10|11|12|2015|2016|2017|2018|2019|2020|2021} [ecmaVersion] The ECMAScript version (or revision number).
+ * @property {"script"|"module"} [sourceType] The source code type.
+ */
+
+/**
+ * @typedef {Object} ConfigData
+ * @property {Record<string, boolean>} [env] The environment settings.
+ * @property {string | string[]} [extends] The path to other config files or the package name of shareable configs.
+ * @property {Record<string, GlobalConf>} [globals] The global variable settings.
+ * @property {string | string[]} [ignorePatterns] The glob patterns that ignore to lint.
+ * @property {boolean} [noInlineConfig] The flag that disables directive comments.
+ * @property {OverrideConfigData[]} [overrides] The override settings per kind of files.
+ * @property {string} [parser] The path to a parser or the package name of a parser.
+ * @property {ParserOptions} [parserOptions] The parser options.
+ * @property {string[]} [plugins] The plugin specifiers.
+ * @property {string} [processor] The processor specifier.
+ * @property {boolean} [reportUnusedDisableDirectives] The flag to report unused `eslint-disable` comments.
+ * @property {boolean} [root] The root flag.
+ * @property {Record<string, RuleConf>} [rules] The rule settings.
+ * @property {Object} [settings] The shared settings.
+ */
+
+/**
+ * @typedef {Object} OverrideConfigData
+ * @property {Record<string, boolean>} [env] The environment settings.
+ * @property {string | string[]} [excludedFiles] The glob pattarns for excluded files.
+ * @property {string | string[]} [extends] The path to other config files or the package name of shareable configs.
+ * @property {string | string[]} files The glob patterns for target files.
+ * @property {Record<string, GlobalConf>} [globals] The global variable settings.
+ * @property {boolean} [noInlineConfig] The flag that disables directive comments.
+ * @property {OverrideConfigData[]} [overrides] The override settings per kind of files.
+ * @property {string} [parser] The path to a parser or the package name of a parser.
+ * @property {ParserOptions} [parserOptions] The parser options.
+ * @property {string[]} [plugins] The plugin specifiers.
+ * @property {string} [processor] The processor specifier.
+ * @property {boolean} [reportUnusedDisableDirectives] The flag to report unused `eslint-disable` comments.
+ * @property {Record<string, RuleConf>} [rules] The rule settings.
+ * @property {Object} [settings] The shared settings.
+ */
+
+/**
+ * @typedef {Object} ParseResult
+ * @property {Object} ast The AST.
+ * @property {ScopeManager} [scopeManager] The scope manager of the AST.
+ * @property {Record<string, any>} [services] The services that the parser provides.
+ * @property {Record<string, string[]>} [visitorKeys] The visitor keys of the AST.
+ */
+
+/**
+ * @typedef {Object} Parser
+ * @property {(text:string, options:ParserOptions) => Object} parse The definition of global variables.
+ * @property {(text:string, options:ParserOptions) => ParseResult} [parseForESLint] The parser options that will be enabled under this environment.
+ */
+
+/**
+ * @typedef {Object} Environment
+ * @property {Record<string, GlobalConf>} [globals] The definition of global variables.
+ * @property {ParserOptions} [parserOptions] The parser options that will be enabled under this environment.
+ */
+
+/**
+ * @typedef {Object} LintMessage
+ * @property {number} column The 1-based column number.
+ * @property {number} [endColumn] The 1-based column number of the end location.
+ * @property {number} [endLine] The 1-based line number of the end location.
+ * @property {boolean} fatal If `true` then this is a fatal error.
+ * @property {{range:[number,number], text:string}} [fix] Information for autofix.
+ * @property {number} line The 1-based line number.
+ * @property {string} message The error message.
+ * @property {string|null} ruleId The ID of the rule which makes this message.
+ * @property {0|1|2} severity The severity of this message.
+ * @property {Array<{desc?: string, messageId?: string, fix: {range: [number, number], text: string}}>} [suggestions] Information for suggestions.
+ */
+
+/**
+ * @typedef {Object} SuggestionResult
+ * @property {string} desc A short description.
+ * @property {string} [messageId] Id referencing a message for the description.
+ * @property {{ text: string, range: number[] }} fix fix result info
+ */
+
+/**
+ * @typedef {Object} Processor
+ * @property {(text:string, filename:string) => Array<string | { text:string, filename:string }>} [preprocess] The function to extract code blocks.
+ * @property {(messagesList:LintMessage[][], filename:string) => LintMessage[]} [postprocess] The function to merge messages.
+ * @property {boolean} [supportsAutofix] If `true` then it means the processor supports autofix.
+ */
+
+/**
+ * @typedef {Object} RuleMetaDocs
+ * @property {string} category The category of the rule.
+ * @property {string} description The description of the rule.
+ * @property {boolean} recommended If `true` then the rule is included in `eslint:recommended` preset.
+ * @property {string} url The URL of the rule documentation.
+ */
+
+/**
+ * @typedef {Object} RuleMeta
+ * @property {boolean} [deprecated] If `true` then the rule has been deprecated.
+ * @property {RuleMetaDocs} docs The document information of the rule.
+ * @property {"code"|"whitespace"} [fixable] The autofix type.
+ * @property {Record<string,string>} [messages] The messages the rule reports.
+ * @property {string[]} [replacedBy] The IDs of the alternative rules.
+ * @property {Array|Object} schema The option schema of the rule.
+ * @property {"problem"|"suggestion"|"layout"} type The rule type.
+ */
+
+/**
+ * @typedef {Object} Rule
+ * @property {Function} create The factory of the rule.
+ * @property {RuleMeta} meta The meta data of the rule.
+ */
+
+/**
+ * @typedef {Object} Plugin
+ * @property {Record<string, ConfigData>} [configs] The definition of plugin configs.
+ * @property {Record<string, Environment>} [environments] The definition of plugin environments.
+ * @property {Record<string, Processor>} [processors] The definition of plugin processors.
+ * @property {Record<string, Function | Rule>} [rules] The definition of plugin rules.
+ */
+
+/**
+ * Information of deprecated rules.
+ * @typedef {Object} DeprecatedRuleInfo
+ * @property {string} ruleId The rule ID.
+ * @property {string[]} replacedBy The rule IDs that replace this deprecated rule.
+ */