Skills
101,174 packaged capabilities and playbooks for agents. Install any of them with one command.
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Design and write deterministic multi-agent workflow scripts (.js files in .claude/workflows/) for Claude Code's Workflow tool. Use when a user wants to build, create, author, scaffold, or run a custom Claude Code workflow, orchestrate sub-agents (fan-out, pipeline, loop, judge-panel), or automate a repeatable multi-step task across fresh-context agents.
Applies a systematic three-pass revision system (Zinsser, King, Pinker, Clark) to existing drafts — Pass 1 cuts clutter, Pass 2 reduces cognitive load, Pass 3 improves rhythm. Use when revising, editing, or polishing drafts, cutting word count, tightening prose, improving readability, or fixing flow, or when user mentions revision, editing, cut clutter, too wordy, improve readability, fix the flow, reduce word count.
Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify existing spreadsheets while preserving formulas, (4) Data analysis and visualization in spreadsheets, or (5) Recalculating formulas
Toolkit for comprehensive Spreadsheet reading, creation, editing, and analysis with visual quality control. Use to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing tabular data, (3) Modifying existing spreadsheets while preserving formulas, (4) Building financial models with proper formatting, (5) Data visualization with in-sheet charts, or any other spreadsheet tasks.
Use when a sanitized issue summary, requirement summary, or design brief needs technical design exploration before creating ADRs, specifications, or implementation plans. This skill inspects repository context, clarifies material ambiguity, compares feasible approaches and trade-offs, recommends a direction, obtains approval, and identifies ADR candidates. This should trigger for requests such as Explore a design; Compare implementation approaches; Recommend an architecture direction; Clarify technical options before planning. Part of Plinth Toolkit
Complete academic research skill suite covering the full pipeline: paper reading (read/explain papers with storytelling), idea generation (brainstorm research directions), experiment design (plan experiments, ablation, baselines), proof writing (mathematical proofs, LaTeX theorems), paper writing (draft to camera-ready for top venues like NeurIPS/ICLR/ACL), paper review (structured 4-step review with scoring), and professor fit analysis (evaluate advisors, cold emails, interview strategy). Trigger keywords: read paper, brainstorm, experiment design, prove, write paper, review, professor fit, advisor, cold email, LaTeX, research, NeurIPS, ICLR, ACL, arXiv, 讀論文, 寫論文, 審稿, 實驗設計, 數學證明, 研究方向, 教授分析, 選指導教授.
Analyze the message match between your ads and landing pages. Checks if the promise in the ad copy carries through to the landing page headline, body, and CTA. Flags disconnects that kill conversion rates. Works with Google, Meta, and LinkedIn ads.
Desktop automation through the real Rust agent-desktop CLI, published in Printing Press through a small bridge. Use when an agent needs to observe, inspect, or control native desktop applications with accessibility trees: snapshots, refs, clicks, typing, scrolling, windows, notifications, screenshots, clipboard, waits, and bundled version-matched skill docs.
Customizes an autorater (evaluation metric) for an AI agent so its grades match the user's own judgment, starting from the agent's real trajectories. Use when a user wants a metric tailored to their agent, wants to turn failing trajectories into rubrics, says an existing autorater grades their agent wrong, or wants an autorater to agree with human labels (autorater hillclimbing, judge calibration). Don't use for quick evals with built-in metrics or for improving the agent itself (use agent-platform-eval-flywheel).
Must be used when the user requests AI/Agent security assessment, blue-team exercises, AI security review, prompt injection testing, MCP/Skill/plugin/code package audits, Agent toolchain abuse testing, or needs to generate Markdown/HTML resembling a penetration test report. This skill turns the Agent into an AI security expert from an authorized blue-team perspective, conducting security exercises against AI products, Agents, MCP Servers, Skills, code repositories, and AI infrastructure. Prefer first-principles reasoning and real evidence over mechanically running a payload library; scripts are used only for deterministic auxiliary tasks such as HTTP fingerprinting, evidence aggregation, and report rendering.
Initialize, migrate, or refresh a repo's ai-memory wiring: the .ai-memory.toml routing marker (workspace/project), the recall/write routing snippet in CLAUDE.md/AGENTS.md, the ai-memory MCP server entry, and the global capture hooks. Includes the qmd→ai-memory migration for repos still on the old wiki/qmd stack, and a refresh flow that detects CLI↔server version skew and re-stages hooks to parity. Use when the user asks to set up ai-memory in a project (greenfield or brownfield), wire the MCP, enable auto-capture, migrate off qmd, diagnose with doctor, or upgrade/refresh an existing setup (local CLI + hooks) to the server's version.
Create production-quality Android applications following Google's official Android architecture guidance with Kotlin, Jetpack Compose, MVVM architecture, Hilt dependency injection, Room database, and multi-module architecture. Triggers on requests to create Android projects, modules, screens, ViewModels, repositories, or when asked about Android architecture patterns and best practices.
Builds React mobile UIs with Ant Design Mobile (antd-mobile) components including Button, Form, List, Modal, Picker, Tabs, PullToRefresh, InfiniteScroll, and 50+ mobile-optimized components. Use when the user needs to create mobile-first React interfaces, implement mobile navigation, forms, or data display with Ant Design Mobile.
Migrate applications from Heroku, AWS, Render, Railway, Fly.io, or Docker Compose to DigitalOcean App Platform. Use when converting existing apps, mapping services, refactoring platform-specific code, or creating app specs from other platform configurations.
Use when building an apple.com-style marketing/product page — the landing-page formula (sticky translucent nav, product-as-hero, full-bleed feature sections, bento grids, fat footer), scroll-driven storytelling, plus the interaction inventory that makes a flagship page feel ALIVE (continuous damped scroll-progress, theme morph, sticky-stack pinning, text wipe, ambient float), the hero media pipeline (video scrub, image sequence, asset sourcing), and Apple's front-end engineering (progressive enhancement, vanilla JS, perf discipline). Part of the apple-design family. Keywords: apple.com, marketing page, landing page, hero, scrollytelling, video scrub, interaction inventory, cross-section theme morph, sticky-stack, chaptered pinning, ambient float, canvas image sequence, createImageBitmap, WebGL 3D viewer, parallax, animation-timeline, scroll-driven animation, IntersectionObserver, progressive enhancement, srcset lazy load, frosted nav, media assets, device frame, CC0, asset sourcing.
Implement proven backend architecture patterns including Clean Architecture, Hexagonal Architecture, and Domain-Driven Design. Use this skill when designing clean architecture for a new microservice, when refactoring a monolith to use bounded contexts, when implementing hexagonal or onion architecture patterns, or when debugging dependency cycles between application layers.
Use when the user needs standalone HTML/CSS/JS artifacts — interactive demos, prototypes, single-file applications, or visual tools that run independently in a browser. Triggers: user says "artifact", "demo", "prototype", "single-file app", "HTML tool", "interactive widget", "standalone page", building something that runs in a browser without a build step.
Manage customer reviews and developer responses using the `asc` CLI tool. Use this skill when: (1) Listing customer reviews for an app: "asc reviews list --app-id <id>" (2) Getting a specific review: "asc reviews get --review-id <id>" (3) Getting the response to a review: "asc review-responses get --review-id <id>" (4) Creating a response to a review: "asc review-responses create --review-id <id> --response-body <text>" (5) Deleting a response: "asc review-responses delete --response-id <id>" (6) User says "list reviews", "respond to review", "delete response", "check customer feedback", "reply to App Store review", or any customer review management task
Manage Game Center features using the `asc` CLI tool. Use this skill when: (1) Getting Game Center detail for an app: "asc game-center detail get --app-id ID" (2) Listing achievements: "asc game-center achievements list --detail-id ID" (3) Creating achievements: "asc game-center achievements create --detail-id ID --reference-name NAME --vendor-identifier ID --points N" (4) Deleting achievements: "asc game-center achievements delete --achievement-id ID" (5) Listing leaderboards: "asc game-center leaderboards list --detail-id ID" (6) Creating leaderboards: "asc game-center leaderboards create --detail-id ID --reference-name NAME --vendor-identifier ID --score-sort-type ASC|DESC --submission-type BEST_SCORE|MOST_RECENT_SCORE" (7) Deleting leaderboards: "asc game-center leaderboards delete --leaderboard-id ID" Trigger phrases: "game center", "achievements", "leaderboards", "arcade enabled", "score sort", "best score", "most recent score"
Manage App Store review contact info and demo account settings using the `asc` CLI tool. Use this skill when: (1) Getting current review info: "asc version-review-detail get --version-id ID" (2) Setting review contact info before submission: "asc version-review-detail update --version-id ID ..." (3) Configuring demo account credentials for App Review team (4) User asks "set review info", "add review contact", "configure demo account", "fix reviewContactCheck" (5) Diagnosing a failed reviewContactCheck from asc versions check-readiness
Drafting of assignations en référé before the tribunal de commerce or tribunal des activités économiques for the recovery of commercial debts. Use this skill when the user asks to draft, prepare, or create an assignation en référé to obtain payment of an unpaid debt (invoices, services, sales of goods, etc.) when the debtor has not honoured its payment obligations and there is no serious dispute.
Audit a Hostinger web hosting account (Shared, Cloud and Agency plans) and report what needs attention: every plan and website, SSL problems, broken or vulnerable WordPress installs, failed Node.js builds and vulnerable npm packages, databases and Agency Plan orders near their limits, and hosting plans about to lapse. Read-only; produces a prioritised to-do list and names the skill that fixes each item. Triggers: what do I have on Hostinger, audit my hosting, check all my websites, what needs attention, health check my sites, are any of my sites broken, which of my sites are insecure
Audit a website with the squirrelscan CLI and fix the findings in code. Runs SEO, performance, security, technical, content, accessibility, and 15 other rule categories (260+ rules), returns an LLM-optimized report, then drives an iterative fix loop, mapping issues to source files, applying fixes, and re-auditing until the site scores well. Use to discover and assess website or webapp issues and drive them to fixed.
Use when authoring or amending a high-fidelity UI design AS CODE — each key screen realized as runnable code (standalone HTML+Tailwind by default, React+shadcn when the build stack is React), derived from upstream wireframes + design-system, rendered headlessly and screenshotted, used as a build SEED. Guides the METHOD, not the outline: deriving one screen per wireframe-named screen/state, consuming design-system tokens through a token-to-code map (never inventing a token or raw hex/px), realizing the visual language + objective polish + named aesthetic heuristics to real pixels, rendering real content + every state, running a bounded generate-render-screenshot-vision-review-refine loop, judging numeric WCAG 2.2 AA on the render, and amending as a scoped versioned delta. Composes with a template tool + agent-browser + shadcn + research. Requires a vision-capable runtime. Not for reviewing hi-fi, the screen structure (wireframes), the token system (design-system), or final code.
Use when the system needs to track its own effectiveness, learn from errors, adapt workflows, and continuously improve performance - activates automatically every session to collect metrics, classify errors, recognize patterns, and implement evidence-based workflow improvements
Write efficient data queries in B2C Commerce for products, customers, and orders. Use this skill whenever the user needs to search products on a storefront page, look up customer profiles, query orders, paginate search results, or fix slow category pages. Also use when they ask about performance problems with data access, replacing database-intensive APIs with index-backed alternatives, or choosing between search vs query methods — even if they just say "my category page is slow" or "how do I find customers by email".
Create and manage on-demand sandboxes (ODS) for B2C Commerce using the b2c CLI. Use this skill whenever the user needs to spin up a new development sandbox, list running sandboxes, start/stop/restart an instance, or manage sandbox lifecycle — even if they just say "I need a sandbox" or "restart my instance".
Use when planning work (to create items and tasks), when starting implementation (to start and work tasks), when completing work (to mark tasks done), or to check backlog status. Manages .backlogmd/ (work/ and z-archive/); no shared manifest or backlog file. Item index.md has metadata, description, and CONTEXT for agents.
The Balanced Coupling model for software design. Use when: designing modular architectures, evaluating coupling between components, reviewing code modularity, deciding whether to split or merge modules/services, assessing integration patterns, classifying coupling as balanced or unbalanced, applying DDD strategic and tactical patterns, reasoning about cohesion vs coupling trade-offs, identifying distributed monolith risks, or explaining why a system is hard to change. Provides the three-dimensional framework (integration strength, distance, volatility) and the balance rule for making coupling decisions.
This skill MUST be used when the user names the BCG growth-share matrix (BCG 矩陣、成長佔有率矩陣、搖錢母牛), and SHOULD be used when assessing investment priorities across businesses, products, or brands using market growth and relative market share, including 資源配置、事業組合、產品組合、 投資、維持、收割、重定位或退出.
Use when implementing audio in Bevy 0.20 with `AudioPlayer`, `PlaybackSettings`, `AudioSink` or `SpatialAudioSink`, spatial listeners, application mix groups, ambience/music transitions, asset lifetime, browser gesture restrictions, or choosing built-in audio versus `bevy_seedling 0.8`.
When the user wants to apply, document, or enforce brand guidelines for any product or company. Also use when the user mentions 'brand guidelines,' 'brand colors,' 'typography,' 'logo usage,' 'brand voice,' 'visual identity,' 'tone of voice,' 'brand standards,' 'style guide,' 'brand consistency,' or 'company design standards.' Covers color systems, typography, logo rules, imagery guidelines, and tone matrix for any brand — including Anthropic's official identity.
Use when defining how a brand is positioned against competitors, writing a positioning or onliness statement, mapping a market to find an open position, or deciding which category to own. Keywords - brand positioning, onliness statement, positioning map, 22 Immutable Laws, Ries and Trout, Neumeier ZAG, ladder concept, cherchez le creneau, trueline.
Define a brand's voice and produce a working voice guide: a personality archetype, settings on eight voice dimensions, do/don't rules, word choices, a tone matrix by context, and before/after rewrites of the user's real content. Use when the user says 'define my brand voice', 'what should our tone be', 'make this sound like us', 'our content sounds generic/inconsistent', 'write tone-of-voice or brand guidelines', or before producing copy at scale across channels. Also use in audit mode when existing content needs to be checked against a voice. Produces a Voice Guide document that other skills consume when writing any copy.
This skill should be used when analyzing market breadth charts, specifically the S&P 500 Breadth Index (200-Day MA based) and the US Stock Market Uptrend Stock Ratio charts. Use this skill when the user provides breadth chart images for analysis, requests market breadth assessment, positioning strategy recommendations, or wants to understand medium-term strategic and short-term tactical market outlook based on breadth indicators. All analysis and output are conducted in English.
Generate Minervini-style breakout trade plans from VCP screener output with worst-case risk calculation, portfolio heat management, and Alpaca-compatible order templates (stop-limit bracket for pre-placement, limit bracket for post-confirmation). Use when the user has VCP screener results and wants actionable trade plans with entry/stop/target levels and position sizing.
Screen US stocks using William O'Neil's CANSLIM growth stock methodology. Use when user requests CANSLIM stock screening, growth stock analysis, momentum stock identification, or wants to find stocks with strong earnings and price momentum following O'Neil's investment system.
Ultra-compressed communication mode. Cuts token usage ~75% by dropping filler, articles, and pleasantries while keeping full technical accuracy. Use when user says "caveman mode", "talk like caveman", "use caveman", "less tokens", "be brief", or invokes /caveman.
Claude Code + Codex parallel pipeline for bootstrapping Trellis coding specs. CC analyzes the repo with GitNexus (knowledge graph) + ABCoder (AST), creates Trellis task PRDs with full architectural context and MCP tool instructions, then Codex agents run those tasks in parallel to fill spec files. Use when: bootstrapping coding guidelines, setting up Trellis specs, 'bootstrap specs for codex', 'create spec tasks', 'CC + Codex spec pipeline', 'initialize coding guidelines with code intelligence'. Also triggers when user wants to set up GitNexus or ABCoder MCP for multi-agent spec generation.
Generate structured session summaries optimized for future AI agent consumption. Use when (1) ending a coding/debugging session, (2) user says "compact", "summarize session", "save context", or "wrap up", (3) context window is getting long and continuity matters, (4) before switching tasks or taking a break. Produces machine-readable handoff documents that let the next session start fluently without re-explaining.
New to MCP?
From what the protocol is to installing your first server, these answers cover most first questions.
An open protocol that defines how AI applications connect to external tools and data in a uniform way. Clients talk to the model; MCP servers provide tools, resources and prompt templates. They exchange standard messages, so one server can be reused by many clients.