Claude Skills
The open format is called Agent Skills and works in Claude Code, Codex, Cursor and other agents — most people know it as Claude Skills.
Every Agent Skill we could find on GitHub, deduplicated by content. 79 600 files from 1 763 authors, of which 61 947 are unique — the rest is the same skill repackaged into someone else's repository. For each one: what it weighs in tokens, whether it ships runnable scripts, and which MCP servers it needs.
Analyze emails for phishing, scam indicators, and security threats
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Telegram bot development - chatbots, notifications, AI assistants, and group automation
Auto-fill document templates with data - mail merge for any format
Automate audio/video transcription, meeting notes, subtitle generation, and content processing
Automate Trello board management, card workflows, power-ups, and team collaboration
Automate Twitter/X social media workflows including posting, engagement, analytics, and audience growth
Automate weather-based workflows, forecasts, alerts, and location-aware notifications
Automate SMS communications, two-way messaging, notifications, and voice workflows with Twilio
Formulate effective web search queries, analyze search results, and synthesize findings. Optimize search strategies for different types of information needs.
Build and manage webhook-based integrations for real-time event processing and API connections
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WhatsApp Business automation - customer support, notifications, chatbots, and broadcast messaging
Automate WooCommerce e-commerce operations including orders, inventory, customers, and marketing
Create, edit, and manipulate Excel spreadsheets programmatically using openpyxl
Automate YouTube content workflows including video management, analytics, scheduling, and channel optimization
Automate customer support workflows with Zendesk ticket management, routing, and analytics
Essential fuzzing payloads: SQL injection, command injection, special characters. Curated essentials for vulnerability testing.
Top username lists for enumeration: common usernames, default credentials, names. Curated essentials for authorized testing.
Top password lists for authorized security testing: common passwords, darkweb leaks, worst passwords. Curated essentials (<10MB).
Comprehensive LLM security testing prompts for bias detection, data leakage, alignment testing, and adversarial prompt resistance.
Essential exploitation payloads: anti-virus test files, file name exploits, malicious files. Curated for testing.
Sensitive data patterns for security testing: API keys, credit cards, emails, SSNs, phone numbers, IPs, and more. Use for data discovery and validation.
Web shell samples for detection and analysis: PHP, ASP, ASPX, JSP, Python, Perl shells. Use for security research and detection system testing.
> This skill manages furusato nozei (hometown tax) donations. Use when the user wants to register donation data, read donation receipts, check deduction limits, "furusato", "寄附金", "寄付金", "ふるさと納税の控除", "寄附金受領証明書", "ワンストップ特例".
> This skill should be used when the user wants to file their tax return electronically via the 確定申告書等作成コーナー (NTA Tax Return Preparation Corner) using Claude in Chrome, Antigravity Browser Sub-Agent, or Playwright CLI (fallback). It guides the "e-Tax提出", "電子申告", "e-Taxで申告", "作成コーナーに入力", "確定申告書等作成コーナー", "作成コーナー", "申告書を提出".
> 優良な電子帳簿の要件チェック・コンプライアンス診断を実行する。 「優良な電子帳簿」「電帳法対応」「電子帳簿の要件確認」 「税務調査の準備」「75万円控除の条件」「帳簿の要件を満たしているか」 「e-bookkeeping compliance」で起動。
> Display shinkoku's current capabilities, supported personas, and known limitations. Use when the user asks "what can you do?", "what's supported?", or similar questions.
> This skill should be used when the user needs to know what documents to collect for their tax filing, wants a checklist of required documents, or asks where to "何を準備すればいい", "源泉徴収票はどこで", "書類チェックリスト", "確定申告に必要なもの", "書類収集", "準備するもの".
> This skill should be used when the user needs to calculate their income tax (所得税), compute deductions, or import withholding slips. Trigger phrases "源泉徴収票を取り込む", "所得税額", "納付額を計算", "還付額を計算", "第一表", "第二表", "申告書B", "所得控除", "税額控除".
> This skill should be used when the user needs to calculate consumption tax (消費税) or determine their tax method (2割特例, 簡易課税, or 本則課税). "2割特例", "簡易課税", "本則課税", "課税売上", "消費税額", "インボイス", "みなし仕入率", "課税仕入".
> This skill should be used when the user asks to determine what tax filings they need, wants to know if they must file a tax return (確定申告), asks about consumption tax obligations (消費税), or needs help understanding their filing "消費税の届出", "課税事業者かどうか", "何を申告すればいい", "申告要否", "税金の申告", "住民税の申告".
> 控除証明書（生命保険料・地震保険料等）の画像を読み取り構造化データを返す。 他のスキルから呼び出されるほか、直接ユーザーが呼び出すことも可能。
> 源泉徴収票の画像を読み取り構造化データを返す。 他のスキルから呼び出されるほか、直接ユーザーが呼び出すことも可能。
> This skill should be used when the user asks about the invoice system (インボイス制度), qualified invoices (適格請求書), registration numbers (登録番号), input tax credits (仕入税額控除), the 20% special measure (2割特例), the 30% special measure (3割特例), tax-exempt businesses (免税事業者), transitional measures (経過措置), small-amount exceptions (少額特例), corrected invoices (修正インボイス), or any related topics. "仕入税額控除", "2割特例", "3割特例", "免税事業者", "経過措置", "少額特例", "修正インボイス", "返還インボイス", "簡易インボイス", "インボイス登録", "T番号", "適格請求書発行事業者".
> レシート・領収書・ふるさと納税受領証明書の画像を読み取り構造化データを返す。 他のスキルから呼び出されるほか、直接ユーザーが呼び出すことも可能。
> 支払調書の画像を読み取り構造化データを返す。 他のスキルから呼び出されるほか、直接ユーザーが呼び出すことも可能。
> This skill should be used when the user wants to record bookkeeping entries (仕訳), import transaction data from CSV files, receipts, or invoices, or "仕訳登録", "CSVを取り込む", "レシートを読み込む", "請求書を取り込む", "帳簿を付ける", "経費を記録", "売上を記録", "仕訳を修正", "仕訳を検索", "仕訳を削除", "取引を登録", "帳簿の初期化".
> 法人成り（個人事業主から法人への移行）に関する相談。税額比較シミュレーション、 法人形態の選択、設立手続き、役員報酬戦略、社会保険の比較を支援する。 "法人税と所得税の比較", "役員報酬", "法人成りのタイミング", "マイクロ法人", "1人法人"
> 請求書の画像を読み取り構造化データを返す。 他のスキルから呼び出されるほか、直接ユーザーが呼び出すことも可能。
> This skill should be used when the user needs to perform year-end closing adjustments (決算整理), review financial statements (決算書), compute "決算", "決算整理", "決算書を作る", "減価償却", "試算表", "残高試算表", "損益計算書", "貸借対照表", "BS", "PL", "期末処理", "棚卸し", "未払計上", "前払処理".
> This skill should be used when the user wants to set up shinkoku for the first time, initialize their configuration, or update their existing settings. "shinkokuの設定", "config", "setup", "始め方", "使い方", "設定を更新", "configを作り直す".
> Background context for housing loan tax credit (住宅ローン控除) in the shinkoku tax filing plugin. Contains eligibility requirements, credit limits, calculation rules, and interaction with furusato-nozei for the current tax year. This skill is not user-invocable — Claude loads it automatically when responding to housing loan tax credit questions or calculations.
> This skill should be used when the user asks tax-related questions, wants advice on deductions or tax savings, or needs expert guidance equivalent to a tax "控除は使える？", "確定申告の相談", "節税", "ふるさと納税の上限", "iDeCoの効果", "住宅ローン控除", "青色申告のメリット", "消費税はかかる？", "扶養に入れる？", "配偶者控除", "医療費控除", "法人成り", "経費になる？", "税率を教えて", "所得税の計算", "住民税", "社会保険料", "103万の壁", "130万の壁", "インボイス", "簡易課税", "税制改正", "開業届", "副業バレ", "白色申告", "税務調査", "特定支出控除", "予定納税", "中間納付".
> Background context for the Electronic Bookkeeping Act (電子帳簿保存法) in the shinkoku tax filing plugin. Contains requirements for electronic bookkeeping, scanner storage, mandatory electronic transaction data storage, and shinkoku's compliance status. This skill is not user-invocable — Claude loads it automatically when responding to electronic bookkeeping compliance questions.
> Background context for invoice-system input tax credit rules (仕入税額控除) in the shinkoku tax filing plugin. Contains eligibility requirements, the 6 permanent exceptions (帳簿のみ保存の恒久特例), transitional measures for purchases from tax-exempt businesses, and storage requirements. This skill is not user-invocable — Claude loads it automatically when responding to input tax credit questions under the invoice system.
> Background legal and regulatory context for the shinkoku tax filing plugin. Contains the standard disclaimer about the scope of tax information provided, the relationship to the Tax Accountant Act (税理士法), and tool limitations. This skill is not user-invocable — Claude loads it automatically when generating tax-related responses that require a disclaimer.
> This skill should be used when the user is ready to submit their tax return, needs a final review checklist, wants to know how to submit (e-Tax, mail, or in-person), or asks about common mistakes before submission. Trigger phrases "申告書の確認", "提出前の確認", "郵送で提出", "税務署に持っていく", "提出期限".
This skill should be used when the user reports a bug, describes unexpected behavior, says something is "broken", "not working", "failing", mentions an "error", "issue", or "problem" in code, or asks to "fix" something. Enforces test-driven bug fixing workflow.
Methodology for effective AI-assisted software development. Use when helping users build software with AI coding assistants, debugging AI-generated code, planning features for AI implementation, managing version control in AI workflows, or when users mention "vibe coding," Claude Code, Cursor, GitHub Copilot, Aider, Continue, Cline, Codex, Windsurf, or similar AI coding tools. Provides strategies for planning, testing, debugging, and iterating on code written with LLM assistance.
Use this skill when creating new files that represent architectural decisions — data models, infrastructure configs, auth boundaries, API contracts, CI/CD pipelines, or event systems. Flags irreversible decisions and forces a discussion about trade-offs before committing.
Web accessibility patterns for news sites, journalism tools, and academic platforms. Use when building accessible interfaces, auditing existing sites for WCAG compliance, writing alt text for news images, creating accessible data visualizations, or ensuring content reaches all readers including those using assistive technologies. Essential for newsroom developers and anyone publishing web content.
Remote JavaScript console access and debugging on mobile devices. Use when debugging web pages on phones/tablets, accessing console errors without desktop DevTools, testing responsive designs on real devices, or diagnosing mobile-specific issues. Covers locally hosted Eruda and vConsole, Chrome/Safari remote debugging, and cloud testing platforms.
Electron desktop application development with React, TypeScript, and Vite. Use when building desktop apps, implementing IPC communication, managing windows/tray, handling PTY terminals, integrating WebRTC/audio, or packaging with electron-builder. Covers patterns from AudioBash, Yap, and Pisscord projects.
Python data processing pipelines with modular architecture. Use when building content processing workflows, implementing dispatcher patterns, integrating Google Sheets/Drive APIs, or creating batch processing systems. Covers patterns from rosen-scraper, image-analyzer, and social-scraper projects.
>- Use this skill when the user asks to update CLAUDE.md, save a lesson, or "what should we remember", "save this lesson", or "add to context". Scans the conversation for hard-won lessons, new file paths, infrastructure changes, and new workflows, then proposes scoped edits to the project's CLAUDE.md for approval before writing.
Zero-build frontend development with locally vendored React, Tailwind CSS, and vanilla JavaScript. Use when building static web apps without a deployment build step, creating Leaflet maps, integrating Google Sheets as a database, or developing browser extensions. Covers lockfile-verified browser dependencies and patterns from rosen-frontend, NJCIC map, and PocketLink projects.
Authorized web content extraction with trust-boundary controls, scraping cascades, poison-pill detection, browser rendering, observed API analysis, and social-media archiving. Use when extracting public content, diagnosing access failures, implementing respectful scrapers, or processing social-media sources with requests, trafilatura, Playwright, yt-dlp, or instaloader.
Signs of taste in web UI. Use when building or reviewing any user-facing web interface — dashboards, SaaS apps, marketing sites, internal tools. Covers interaction speed, navigation depth, visual restraint, copy quality, and the small details that separate polished products from rough ones.
Claude Skills — questions
Answers built from the skills we actually parsed.