Skills
97,501 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
Builds human-in-the-loop (HITL) Airflow workflows: approval gates, form input, and human-driven branching. Use when a DAG needs a human in the loop—an approval or rejection step, sign-off before a task runs, a decision or approval UI, branching on a human choice, or collecting form input mid-run; also for mentions of ApprovalOperator, HITLOperator, HITLBranchOperator, HITLEntryOperator, or HITLTrigger. Requires Airflow 3.1+. Not for AI/LLM task calls (see migrating-ai-sdk-to-common-ai).
Guides the agent through migrating Capacitor apps from discontinued Ionic Enterprise SDK plugins (Auth Connect, Identity Vault, Secure Storage) to their Capawesome alternatives (OAuth, Vault, Biometrics, Secure Preferences, SQLite). Covers dependency detection, side-by-side API mapping, code replacement, and platform-specific configuration for each plugin pair. Do not use for migrating Capacitor apps or plugins to a newer version, setting up Capawesome Cloud, or non-Capacitor mobile frameworks
Write, rewrite, review, and organize developer-facing documentation for web software projects. Use when creating or improving README files, docs homepages, quickstarts, tutorials, how-to guides, API/reference pages, conceptual explanations, migration guides, or troubleshooting content for frontend, backend, full-stack, SDK, API, or framework-based web products. This skill applies strong information architecture, task-first page structure, clear voice, runnable examples, version and prerequisite hygiene, accessibility rules, and docs-as-code maintenance habits. Do not use it for marketing copy, legal text, or non-technical customer-support articles.
Responsive HTML email template generation using MJML 5.x framework. Use when the user asks to create, generate, design, or build an email template — including welcome emails, promotional blasts, transactional templates, newsletters, or any responsive email. Also use when the user asks to compile MJML to HTML, work with or edit existing MJML templates or `.mjml` files, or troubleshoot email rendering issues across clients.
Large Language and Vision Assistant. Enables visual instruction tuning and image-based conversations. Combines CLIP vision encoder with Vicuna/LLaMA language models. Supports multi-turn image chat, visual question answering, and instruction following. Use for vision-language chatbots or image understanding tasks. Best for conversational image analysis.
Open-source AI observability platform for LLM tracing, evaluation, and monitoring. Use when debugging LLM applications with detailed traces, running evaluations on datasets, or monitoring production AI systems with real-time insights.
CloudBase Node SDK auth guide for server-side identity, user lookup, and custom login tickets. This skill should be used when Node.js code must read caller identity, inspect end users, or bridge an existing user system into CloudBase; not when configuring providers or building client login UI.
Always invoke when the user's message includes 'tailwind' in any form. Also invoke for: building responsive grid layouts (multi-column card grids, product grids), flex/grid page structures (dashboards with sidebars, fixed topbars, mobile-toggle navs), styling UI components (cards, tables, navbars, pricing sections, forms, inputs, badges), adding dark mode variants, fixing spacing or typography, and Tailwind v3/v4 work. The core use case: writing or fixing Tailwind utility classes in HTML templates (Blade, JSX, Vue). Skip for backend PHP logic, database queries, API routes, JavaScript with no HTML/CSS component, CSS file audits, build tool configuration, and vanilla CSS.
RESTful API design, error handling, versioning, and best practices. Use when designing APIs, reviewing endpoints, implementing error responses, or setting up API structure. Triggers on "design API", "review API", "REST best practices", or "API patterns".
Guides the agent through Ionic Framework development with React — project structure, React-specific Ionic components, IonReactRouter and navigation patterns, Ionic lifecycle hooks (useIonViewWillEnter, useIonViewDidEnter, useIonViewWillLeave, useIonViewDidLeave), state management integration, and React-specific best practices for Ionic apps. Do not use for plain Capacitor React apps without Ionic (use capacitor-react), Ionic with Angular or Vue, creating a new Ionic app (use ionic-app-creation), upgrading Ionic to a newer version (use ionic-app-upgrades), or general Ionic component usage without React-specific context (use ionic-app-development).
Write and review high-performance React Native animations and 2D graphics using react-native-reanimated (v4+) and @shopify/react-native-skia (Canvas scenes, runtime effects/shaders). Use for: gesture-driven interactions, spring/timing transitions, layout/mount animations, Reanimated CSS transitions/animations, Skia drawings, animated shader uniforms, path/vector interpolation, dev-mode tuning panels (sliders), and diagnosing animation jank (JS thread stalls, excessive re-renders, per-frame allocations).
Use this skill for setting up vector similarity search with pgvector for AI/ML embeddings, RAG applications, or semantic search. **Trigger when user asks to:** - Store or search vector embeddings in PostgreSQL - Set up semantic search, similarity search, or nearest neighbor search - Create HNSW or IVFFlat indexes for vectors - Implement RAG (Retrieval Augmented Generation) with PostgreSQL - Optimize pgvector performance, recall, or memory usage - Use binary quantization for large vector datasets **Keywords:** pgvector, embeddings, semantic search, vector similarity, HNSW, IVFFlat, halfvec, cosine distance, nearest neighbor, RAG, LLM, AI search Covers: halfvec storage, HNSW index configuration (m, ef_construction, ef_search), quantization strategies, filtered search, bulk loading, and performance tuning.
Use this skill when making a Phaser 4 game responsive or handling display scaling. Covers ScaleManager, scale modes (FIT, RESIZE, EXPAND, ENVELOP), auto-center, fullscreen, and browser resize handling. Triggers on ScaleManager, responsive, resize, fullscreen, FIT, scale mode.
Generates professional animated CLI demos as GIFs using VHS terminal recordings. Use to create terminal demos, record CLI workflows as GIFs, generate animated documentation, build demo tapes for README files, or showcase any command-line tool visually: record terminal / VHS tape / demo GIF / animate my CLI.
Systematically improves TSDoc and README documentation across packages in a TypeScript monorepo. Discovers public API surfaces, generates or improves TSDoc on all exports, rewrites READMEs to a consistent retrieval-friendly structure, and commits each package independently. USE FOR: monorepo-wide documentation passes, single-package doc improvements, TSDoc generation on public exports, README standardization, review council quality checks. DO NOT USE FOR: runtime code changes, security scanning, API reference site generation, non-TypeScript languages.
Estimate how long a coding task will take using the user's own measured history instead of intuition. Use this skill whenever someone asks for an estimate, ETA, timeline, or deadline for a feature, bug, refactor, migration, script, or investigation—"how long will this take", "give me an estimate", "how many hours is this", "can this ship today", "is this a one-day job", "how many days for the whole epic", "what should I tell the client", "estimate this ticket", "size this"—and equally when the ask is skeptical ("is that realistic", "why did that take three days"). Also use it for the machinery behind the estimates—setting up or calibrating estimation, backfilling the task ledger from past Claude Code transcripts, recording a finished task's actuals ("record this task", "log this one", "add this to the ledger"), and rerunning calibration or checking whether past estimates were any good. Trigger it even when the word "estimate" never appears—a question about how much work something is, or how long something took, is this skill.
Use for 'why does X work this way', 'why we picked Y', design rationale, regressions, postmortems, or data-backed thresholds. Discovers available MCPs and queries each evidence category (source control, issue tracker, long-form docs, real-time chat, infrastructure observability, error tracking, product analytics warehouse) in parallel, then returns a cited read on decisions and tradeoffs. Use how for runtime behavior.
Apply when designing or implementing a Payment Connector in VTEX IO. Covers PPF implementation, TypeScript 3.9.7 builder-hub constraints and safe dependency resolutions, configuration.json schema validation, PaymentProviderService clients wiring, Secure Proxy scope (authorize-only), ExternalClient vs SecureExternalClient patterns, IOContext access, PPF response helpers, PSP integration checklist, and vtex link debugging. Use for any implementation of a Payment Connector hosted in VTEX IO.
Find what a change could break somewhere else before it ships, beyond the diff, and prove the one fact it's safe because of by running real code instead of writing it up. Use for "blast radius of X", "what could this break", reviewing a small diff you don't trust, or a brief that asserts something about existing code ("make X public", "X already handles Y") before you design against that assertion.
You are a code refactoring expert specializing in clean code principles, SOLID design patterns, and modern software engineering best practices. Analyze and refactor the provided code to improve its quality, maintainability, and performance
Replace primitive 3D shapes with real GLB models — animated characters, world props, buildings, and scenery for Three.js games. Use when the user says “add 3D models”, “replace the boxes with real models”, “add GLB assets”, or “make the 3D game look real”. For 2D pixel art, use add-assets instead. Do NOT use for 2D pixel art (use add-assets) or gameplay changes (use add-feature).
Uses Chrome DevTools MCP for inspecting, debugging, and testing cookies, session state, authentication issues, and cookie consent compliance. Use when diagnosing 401/403 errors, authentication redirects, session expiration, Cookie/Set-Cookie header issues, cookie banner consent conformance, or third-party cookie/SameSite/Partitioned cookie warnings.
Create interactive data visualizations using d3.js. Use this skill when creating custom charts, graphs, network diagrams, geographic visualizations, or any complex SVG-based data visualization that requires fine-grained control over visual elements, transitions, or interactions. Use it for bespoke visualizations beyond standard charting libraries, whether in React, Vue, Svelte, vanilla JavaScript, or any other environment.
Salesforce Industries Common Core (OmniStudio/Vlocity) Apex callable generation and review with 120-point scoring. TRIGGER when: the user creates or reviews System.Callable classes, migrates `VlocityOpenInterface` / `VlocityOpenInterface2`, or builds Industries callable extensions used by OmniStudio, Integration Procedures, or DataRaptors. DO NOT TRIGGER when: generic Apex classes/triggers (use sf-apex), building Integration Procedures (use sf-industry-commoncore-integration-procedure), authoring OmniScripts (use sf-industry-commoncore-omniscript), configuring Data Mappers (use sf-industry-commoncore-datamapper), or analyzing namespace/dependency issues (use sf-industry-commoncore-omnistudio-analyze).
Storybook story-writing and CSF 3.0 best practices skill. Use when: (1) writing new story files (.stories.tsx, .stories.ts); (2) editing existing stories; (3) configuring Args, Decorators, Parameters; (4) working with Storybook configuration files (.storybook/); (5) tasks include keywords such as “story,” “stories,” “storybook,” or “CSF”
Creative coding skills for Claude Code, claude.ai and Cowork. Motion, micro-interactions and design systems across Web (GSAP, Motion, Three.js, CSS), Android (Jetpack Compose) and Apple (SwiftUI). Proposes an interaction thesis you approve before it writes any code. Anti-AI-slop.
Writes and audits technical docs with Diataxis type gating, runnable examples, and 51 documentation rules. Use when asked to "review my docs", "write an API reference", or improve a documentation page. For a whole README use readme-creator; for agent instructions use agents-md
Code style rules for readable, maintainable implementation. Load this skill always when writing or editing code, and whenever the user asks about code style, refactoring shape, function/file size, object-oriented structure, helper ordering, or comments. For Frappe-specific work, prefer frappe-app-dev.
PrimeNG best practices for Angular. Covers tree-shaking imports, lazy-loaded tables, and the Aura/Lara theme system with design tokens. Activates when working with primeng components. Do not use for Angular Material, Spartan UI, or other component libraries. Install alongside angular-best-practices for full coverage
Create custom OpenLineage extractors for Airflow operators. Use when the user needs lineage from unsupported or third-party operators, wants column-level lineage, or needs complex extraction logic beyond what inlets/outlets provide.
Review AI-generated or human-written code changes with fallow's graph-grounded review brief. Subtracts deterministic concerns (unused code, complexity, duplication, styling) from the loop, ranks what to look at by blast radius and risk, and surfaces the few consequential structural decisions (new public-API contracts, coupling/boundary crossings, new dependencies) as framed judgment questions anchored to verifiable signals. Drives a closed agent-contract loop: fetch the walkthrough guide, return a judgment, and have fallow post-validate it against the live graph (hallucinated or stale judgments are rejected). Use when asked to review a PR, review a branch, review a diff, do a code review, or check changed code before merge.
Use this skill when loading assets in Phaser 4. Covers the Loader plugin, loading images, spritesheets, atlases, audio, JSON, tilemaps, bitmap fonts, and tracking load progress. Triggers on preload, this.load, asset loading, spritesheet, atlas, load progress.
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.