Communityコーディング&開発github.com

eslint-docs

ESLint 10の最新プラクティスを公式ドキュメントに基づいて解説します。eslint.config.js(フラット設定)の作成やレビュー、ルール設定、インラインコメント、CLI運用、カスタムルール作成、プラグイン開発、Node.js APIの利用、ESLint 9/10への移行など、あらゆる場面で活用できます。

eslint-docs とは?

このスキルは、ESLint 10.14.0に関する包括的な知識を提供します。公式ドキュメントに基づき、フラット設定の落とし穴、意外なデフォルト動作、廃止されたAPI、推奨パターンなど、実践的な情報を網羅しています。開発者は、eslint.config.jsの記述、ルールの設定と無効化コメント、CIでのCLI活用(--fix、--cache、--quiet、--max-warnings、一括抑制、フォーマッター、機能フラグ、MCPサーバー)、カスタムルールの作成とRuleTesterによるテスト、プラグインや共有設定、カスタムパーサー・プロセッサー・フォーマッターの構築、Node.js API(ESLint、Linter)の使用、およびESLint 9/10への移行に対応します。各参照ファイルは、設定、無視ファイル、ルール、CLI、移行、カスタムルール、ASTとスコープ、テスト、プラグイン、Node.js API、コアルールなど、タスクに応じて素早くアクセスできるよう整理されています。

対応~Claude Code~Codex CLI~Cursor
npx skills add https://github.com/quentin-autret/claude-skills/tree/main/skills/eslint-docs

Installed? Explore more コーディング&開発 skills: steipete/bluebubbles, steipete/eightctl, steipete/blucli · View all 6 →

お気に入りのAIに質問する

このエージェントスキルを事前に読み込んだ状態で新しいチャットを開きます。

ドキュメント

ESLint 10

このスキルは、https://eslint.org/docs/latest/ に文書化されたESLint 10.14.0をカバーします。習慣との違い(フラット設定の落とし穴、意外なデフォルト、削除されたAPI、ドキュメントが推奨するパターン)をまとめています。各参照ファイルの記述は、出典ページが末尾に記載されています。

ナビゲーション方法

  1. 以下のクイックルールを読んでください。最もよくある間違いをカバーしています。
  2. タスクに該当する参照ファイルを、末尾の表から開いてください。
  3. コードが .eslintrc、env、context.getScope()、FlatESLint を使用している場合、最初に references/migration.md を読んでください。

クイックスタート

npm init @eslint/config@latest
// eslint.config.js
import js from "@eslint/js";
import globals from "globals";
import { defineConfig, globalIgnores } from "eslint/config";

export default defineConfig([
  globalIgnores(["dist/"]),
  {
    files: ["**/*.js", "**/*.mjs", "**/*.cjs"],
    plugins: { js },
    extends: ["js/recommended"],
    languageOptions: { globals: { ...globals.browser } },
    rules: { "no-unused-vars": "warn" },
  },
]);

https://eslint.org/docs/latest/use/getting-started 、 https://eslint.org/docs/latest/use/configure/configuration-files

クイックルール

設定ファイル

ルールとコメント

CLIとCI

カスタムルールと統合

古いパターン

古いパターン現在のパターン
.eslintrc.*、package.json の eslintConfigeslint.config.js と defineConfig()
"extends": "eslint:recommended"extends: ["js/recommended"] と plugins: { js }
env、/* eslint-env */languageOptions.globals、/* global */
.eslintignore、--ignore-pathglobalIgnores()、includeIgnoreFile()
overridesfiles を持つ追加の設定オブジェクト
--rulesdir、linter.defineRule()インラインプラグイン plugins: { local: { rules } }
--no-eslintrc--no-config-lookup
context.getScope()、context.getSourceCode()sourceCode.getScope(node)、context.sourceCode
関数スタイルのルール{ meta, create }
FlatESLint、LegacyESLint、FlatRuleTesterESLint、RuleTester
require-jsdoc、valid-jsdoceslint-plugin-jsdoc

詳細と完全なリスト:references/migration.md。

参照ファイル

ファイル参照する目的
references/configuration.md設定ファイル名と検索、TypeScript設定、設定オブジェクトのキー、files のマッチング、extends、言語オプション、グローバル変数、パーサー、プロセッサー、言語、デバッグ
references/ignoring-files.mdグローバルおよび非グローバルな ignores、デフォルトの無視、ドットファイル、無視解除のレシピ、.gitignore のインポート
references/rules-and-inline-config.md重要度、オプションのマージ、インライン設定コメント、無効化ディレクティブ、linterOptions、修正と提案、循環修正
references/cli.mdグロブ、--fix、終了コード、--quiet、フォーマッター、キャッシュ、一括抑制、機能フラグ、並行処理、MCPサーバー
references/migration.mdESLint 9および10の破壊的変更、コードモッド、eslintrcからフラット設定への移行、変更されたルールオプション、壊れたプラグイン
references/custom-rules.mdルールの meta、ローカルルール、context.report、修正、提案、meta.schema、meta.defaultOptions、非推奨、削除された context メソッド
references/ast-scope-code-paths.mdセレクター、SourceCode メソッド、スコープ、スコープマネージャーオブジェクト、コードパスイベント、プロファイリング
references/testing-rules.mdRuleTester のデフォルト、有効ケースと無効ケース、修正と提案のアサーション、厳格チェック、フック
references/plugins-and-shareable-configs.mdプラグインオブジェクトと meta、プラグイン設定、公開、共有設定、カスタムパーサー、プロセッサー、言語、フォーマッター
references/nodejs-api.mdESLint のオプションとメソッド、lintText、outputFixes、loadFormatter、LintResult、Linter、SourceCode
references/core-rules-problems.mdTypeScriptがカバーするルール、未使用および未宣言の変数、シャドウイング、条件、非同期エラー、正規表現の落とし穴
references/core-rules-restrictions.mdno-restricted-imports、-globals、-properties、-exports、no-restricted-syntax のレシピ、その他の禁止事項、サイズと複雑さの制限
references/core-rules-style.md提案ルールのデフォルト、レイアウトルールのデフォルト、削除されたルール、非推奨のオプション

クロール済みページ:SOURCES.md。

Individual skills in this repo

This repo contains 16 individual skills — each has its own dedicated page.

grafana-cloud-docs

Grafana Cloud pitfalls, defaults, limits and current patterns from the Grafana, Mimir, Loki and Tempo docs, each tied to its docs URL. Use when sending OpenTelemetry data to Grafana Cloud, writing PromQL, LogQL or TraceQL, controlling cardinality and cost, designing alert rules, routing notifications, provisioning alerting, building Synthetic Monitoring checks, using the /apis dashboard API, choosing access policy tokens or service accounts, or migrating off API keys, the Loki Exporter and legacy /api routes.

javascript-docs

Teaches current JavaScript (ECMAScript) practice drawn from the MDN JavaScript documentation. Use when writing, reviewing or fixing modern JavaScript, choosing a built-in API, or replacing a deprecated pattern. Covers equality and coercion, let/const and the temporal dead zone, strict mode, ASI, functions, classes and private fields, objects, prototypes, Proxy, Reflect, Symbol, eval, operators (??, ?., spread, BigInt arithmetic), statements, Promise, async/await, Promise.try, iterators and iterator helpers, generators, using/await using, DisposableStack, WeakRef, Array (toSorted, at, groupBy, fromAsync), Map, Set methods, WeakMap, strings and Unicode, encodeURIComponent, RegExp (v flag, RegExp.escape, lastIndex), Number, Math, BigInt, JSON (rawJSON, revivers), typed arrays, ArrayBuffer, base64, SharedArrayBuffer, Atomics, Temporal, Date, Intl (DateTimeFormat, NumberFormat, Collator, Segmenter, PluralRules), errors (cause, Error.isError), ES modules, import attributes, import.meta, dynamic import.

next-intl-docs

Teaches current next-intl 4 practices for internationalizing Next.js apps, drawn from the official documentation. Use when setting up next-intl with the App Router, writing i18n/request.ts, adding a [locale] segment with defineRouting, createMiddleware in proxy.ts (formerly middleware.ts), building locale switchers with createNavigation, translating with useTranslations or getTranslations, passing messages to NextIntlClientProvider, writing ICU messages (plurals, select, rich text), formatting dates, numbers and lists with useFormatter, translating metadata, Server Actions, Route Handlers, localized 404 and error pages, static rendering with next/root-params, type-safe messages through AppConfig, testing with Jest, Vitest, Storybook, or extracting inline messages with useExtracted. Triggers on next-intl, useTranslations, getTranslations, NextIntlClientProvider, getRequestConfig, i18n routing, locale prefix, localePrefix, NEXT_LOCALE, hreflang, setRequestLocale, ICU messages, App Router internationalization.

nodejs-docs

Teaches Node.js practice drawn from the official Node.js API documentation, with pitfalls, surprising defaults, deprecations and replacements, each backed by its nodejs.org URL. Use when writing, reviewing, debugging or upgrading Node.js code, or choosing a built-in module (fs, crypto, streams, http, process, CLI flags, node:test, ESM/CommonJS, package.json exports, TypeScript type stripping, child_process, worker_threads, node:sqlite, deprecations).

playwright-docs

Pitfalls, surprising defaults and recommended patterns of Playwright Test for JavaScript and TypeScript, distilled from the official docs. Use when writing, reviewing, debugging or configuring Playwright tests (@playwright/test, playwright.config.ts, npx playwright test), including flaky tests, locators (getByRole, filter, strict mode), web-first assertions (expect, toHaveText, toBeVisible, expect.poll, toPass), fixtures, storageState authentication, project dependencies, timeouts, retries, network mocking (page.route, routeFromHAR, routeWebSocket), API testing, clock, aria snapshots, toHaveScreenshot, axe accessibility scans, traces, UI mode, reporters, CI, Docker, sharding, test locks, component testing with stories and mount, codegen, Playwright MCP, playwright-cli and migration from Puppeteer, Protractor, Testing Library or older Playwright versions.

postgresql-docs

Pitfalls, surprising defaults, PostgreSQL 18 changes and recommended patterns from the official PostgreSQL 18 documentation, each backed by its postgresql.org URL. Use when writing or reviewing PostgreSQL SQL, schema design, migrations and ALTER TABLE locks, indexes, transactions, isolation levels and retries, locking, upsert and MERGE, COPY, JSONB, timestamptz, generated and identity columns, partitioning, EXPLAIN, vacuum, roles, row-level security, PL/pgSQL, full-text search, connection settings, and upgrades to PostgreSQL 18.

react-docs

Writes, reviews and upgrades React 19.3 code from the official react.dev documentation. Use when writing components and Hooks, removing unnecessary useEffect calls, fixing Effect dependencies with useEffectEvent, building forms with Actions (useActionState, useOptimistic, useFormStatus, form action), using Server Components, 'use client', 'use server' and Server Functions, Suspense, use(), useTransition, useDeferredValue, ViewTransition, Activity, adopting React Compiler and eslint-plugin-react-hooks, deciding on useMemo, useCallback and memo, server rendering and hydration (createRoot, hydrateRoot, renderToPipeableStream, prerender), or migrating from React 18 (forwardRef, Context.Provider, ReactDOM.render, propTypes, defaultProps). Triggers on React, JSX, hooks, useState, useEffect, useRef, useContext, Server Components, RSC, Actions, React Compiler, Strict Mode, hydration mismatch, React 19 upgrade.

rust-std-docs

Gives current guidance from the official Rust standard library docs (std 1.99.1 stable) on pitfalls, panics, platform differences, discouraged APIs and newer stable replacements. Use when writing, reviewing or refactoring Rust code that uses std, especially collections (Vec, HashMap, BTreeMap, BinaryHeap, entry, extract_if, sort), Option/Result/error handling (expect, ?, Error, ExitCode, panic), iterators (collect, flatten, Peekable, try_fold), Box/Rc/RefCell/Cow/Pin/mem::take, Arc/Mutex/RwLock/OnceLock/LazyLock/thread::scope/mpsc/Condvar/atomics, String/str/fmt/format!/OsString/CString, io/fs/path (BufWriter, OpenOptions, PathBuf::join), process/env/net/time (Command, set_var, TcpStream, Instant, Duration), From/TryFrom/AsRef/Ord/Drop/Deref/Clone, and unsafe raw pointers, MaybeUninit, transmute, NonNull or integer overflow and float ordering.

socketio-docs

Builds, configures and debugs Socket.IO 4.8 servers and clients from the official Socket.IO v4 documentation. Use when writing a Node.js Socket.IO server (Express, Fastify, Koa, Bun, uWebSockets.js) or a socket.io-client app, emitting events with acknowledgements, timeout() and emitWithAck, broadcasting to rooms and namespaces, authenticating in middleware with the auth option, configuring CORS, reverse proxies and sticky sessions, scaling with the Redis, Redis Streams, Postgres, MongoDB or Cluster adapter, enabling connection state recovery and delivery guarantees, tuning reconnection, writing tests, troubleshooting connection issues, or migrating from Socket.IO v2 or v3. Triggers on Socket.IO, socket.io, socket.io-client, io(), new Server, emit, emitWithAck, acknowledgements, rooms, namespaces, broadcast, io.use, middleware, CORS, Redis adapter, sticky sessions, connection state recovery, reconnection, connect_error, Session ID unknown. Not for plain WebSocket servers such as ws without Socket.IO.

tailwindcss-docs

Teaches current Tailwind CSS v4 practices drawn from the official documentation. Use for any task that touches Tailwind CSS v4, even a small one, because many v3 habits silently break in v4. Use when writing or reviewing Tailwind CSS v4 code (utility classes, variants, arbitrary values, theme variables in @theme, @utility, @custom-variant, @apply, @reference, @source), setting up Tailwind in a framework or build tool (Vite plugin, PostCSS plugin, CLI, Next.js, SvelteKit, Nuxt, Angular, Laravel, Rails), customizing the theme (colors, fonts, breakpoints, spacing, animations), building dark mode with a class or data attribute, or migrating a project from Tailwind v3 (tailwind.config.js, @tailwind directives, darkMode class, safelist, bg-opacity, renamed shadow and outline utilities). Triggers on tailwindcss, @import "tailwindcss", @tailwindcss/vite, @tailwindcss/postcss, @tailwindcss/cli, @theme, @custom-variant dark, npx @tailwindcss/upgrade, upgrade to Tailwind v4.

tauri-docs

Tauri 2 apps, tauri.conf.json, capabilities and permissions, commands and invoke, events and channels, plugins, bundling, signing and the updater, migration from Tauri 1. Guides Tauri 2 work from the official v2 documentation, including scopes, managed state, plugin authoring, CSP and the isolation pattern, testing and debugging, Linux, Windows and macOS packages, and mobile and store releases. Use when writing or reviewing a Tauri 2 app, adding a plugin or a capability, fixing a "not allowed" or "forbidden path" error, wiring IPC between Rust and the webview, packaging, signing or publishing a desktop or mobile build, or upgrading a Tauri 1 or 2.0 beta project.

tokio-docs

Gives current guidance from the official tokio documentation (tokio 1.54.1) on async Rust pitfalls, cancel safety, blocking code, surprising defaults and deprecated APIs. Use when writing, reviewing or debugging async Rust code that uses tokio, especially the runtime (#[tokio::main], #[tokio::test], Builder, enable_all, block_on, current_thread, LocalRuntime, shutdown, feature flags), tasks (spawn, JoinHandle, JoinSet, abort, spawn_blocking, block_in_place, LocalSet, spawn_local, task_local), select!, join!, try_join!, cancellation and graceful shutdown, sync primitives (Mutex across .await, RwLock, Semaphore, Notify, OnceCell), channels (mpsc backpressure, oneshot, broadcast lag, watch), time (sleep, interval, MissedTickBehavior, timeout, paused time, start_paused), I/O and networking (AsyncReadExt, BufWriter flush, split, io::copy, framing, TcpListener, TcpStream, UdpSocket), tokio::fs, process (Command, kill_on_drop, Child), signals (ctrl_c, Windows console events) and Windows named pipes.

typescript-docs

Configures, writes and upgrades TypeScript 6.0 code and tsconfig.json from the official TypeScript documentation. Use when upgrading from TypeScript 5.x to 6.0 (strict, types, rootDir, baseUrl, moduleResolution node, target es5, outFile, esModuleInterop), choosing module and moduleResolution, writing package.json exports and imports, fixing ESM and CommonJS interop, enabling verbatimModuleSyntax or erasableSyntaxOnly, setting up project references and tsc --build, writing .d.ts files, checking JavaScript with JSDoc, or debugging narrowing, generics, mapped types, decorators and enums. Triggers on TypeScript, tsc, tsconfig, TS5112, ignoreDeprecations, nodenext, bundler, .d.ts, @ts-check, TypeScript 6 upgrade.

typesense-docs

Pitfalls, surprising defaults and recommended patterns of the Typesense search engine, distilled from the official docs. Use when designing a Typesense collection schema, writing search parameters (q, query_by, filter_by, sort_by, facet_by, group_by), tuning typo tolerance and ranking, building vector, semantic or hybrid search, conversational RAG or natural language search, creating API keys and scoped search keys for multi-tenancy, indexing and import (JSONL, upsert, emplace, dirty_values), syncing from a primary database, reindexing through aliases, managing synonyms (synonym sets), curation sets and stopwords, joins, analytics rules and query suggestions, InstantSearch, migrating from Algolia, or running, clustering, backing up and upgrading a Typesense server.

vite-docs

Teaches current Vite 8 practices drawn from the official documentation. Use when writing or fixing a vite.config, migrating from Vite 7 (Rolldown and Oxc replacing Rollup and esbuild), configuring the dev server, proxy or HMR, handling import.meta.env and modes, tuning the production build, library mode, SSR, writing a Vite plugin, using the HMR or JavaScript API, or the Environment API. Triggers on vite.config, defineConfig, rolldownOptions, import.meta.env, loadEnv, optimizeDeps, ssrLoadModule, ModuleRunner, this.environment, upgrade to Vite 8.

vitest-docs

Teaches current Vitest 5 practices drawn from the official documentation. Use when writing, reviewing or fixing Vitest tests (test, describe, expect, test.for, fixtures with test.extend, hooks, snapshots), mocking with vi (vi.fn, vi.spyOn, vi.mock, vi.when, fake timers, stubGlobal, stubEnv), configuring vitest.config or projects, choosing an environment or pool, filtering and running tests in CI, measuring coverage with v8 or istanbul, debugging slow or flaky suites, testing components in browser mode with Playwright, or migrating from Jest, Mocha or Vitest 4. Triggers on vitest, vi.mock, vi.fn, vitest.config, toMatchSnapshot, expect.poll, coverage thresholds, browser mode, @vitest/browser-playwright, jsdom, happy-dom, migrate Jest to Vitest, upgrade Vitest 5.

関連スキル