Skills
98,639 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
Ember.js performance optimization and accessibility guidelines. Use this skill when writing, reviewing, or refactoring Ember.js code to ensure optimal performance patterns and accessibility. Triggers on tasks involving Ember components, routes, data fetching, bundle optimization, or accessibility improvements.
Go-style error handling for TypeScript: return errors as a plain `Error | T` union instead of throwing. `instanceof Error` narrows the type — no Result wrapper. The gist: ```ts class NotFoundError extends errore.createTaggedError({ name: 'NotFoundError', message: 'User $id not found', }) {} async function getUser(id: string) { const user = await db.findUser(id).catch((e) => new DbError({ cause: e })) if (user instanceof Error) return user // early return, like Go's err != nil if (!user) return new NotFoundError({ id }) return user // caller narrows the same way } ``` ALWAYS read this skill when a repo uses the errore convention (errore.org). ALWAYS use errore for new TypeScript projects.
Godot Expert Analyst: Anara. Visionary project scoring and certification for Godot 4.7+ architecture. Use when evaluating project health, modernity, scalability, dependency graphs, or generating Visionary Certificates. Keywords: analyst, Anara, scoring, certification, architecture audit, ResourceLoader.get_dependencies, typed Dictionary, folder-by-feature, Visionary Certificate, Godot 4.7.
Enforces the gen-l10n/ARB localization contract: every string through AppLocalizations from a template app_en.arb, key + placeholder parity, nullable-getter:false so a missing key is a compile error, ICU plural/select over concatenation, Directional-only geometry (EdgeInsetsDirectional, AlignmentDirectional, TextAlign.start, Icons.adaptive), FSI/PDI isolation for mixed-script runs, per-locale NumberFormat with a pinned numbering system, canonical UTC-epoch + ASCII storage projected only at render, normalize-to-ASCII before any parse, and three vendored LocalizationsDelegates ahead of the Global* ones for a locale flutter_localizations lacks. Use when adding or translating an ARB key, building an RTL screen, formatting or parsing dates/numbers/numerals, wiring l10n.yaml, AppLocalizations, or MaterialApp localizationsDelegates, supporting a locale Flutter lacks (ckb), fixing a locale that crashes on Tooltip or renders LTR, checking bundled-font glyph coverage, isolating technical IDs, or touching app_*.arb.
Builds sophisticated admin interfaces and frontend components using Magento's UI Component framework. Use when creating admin grids, forms, modals, or data-driven interfaces. Masters XML configuration, KnockoutJS templates, data providers, and complex form/grid implementations.
Migrate i18next/react-i18next projects to Lingui. Use when the user wants to replace i18next, react-i18next, useTranslation, i18n.t(), Trans i18nKey, or i18next JSON catalogs with Lingui equivalents. Covers package installation, config setup, code transformation patterns, plural migration, namespace handling, and catalog conversion.
A complete guide to developing MusicFree music player plugins from scratch. Trigger when the user asks to write, create, or develop a MusicFree plugin, or adapt a music website or API into a MusicFree plugin. Covers the full process, including the plugin protocol, media type definitions, method signatures, sandbox environment, site analysis, local debugging, and publishing updates. This Skill is designed for AI execution and guides AI in collaborating with beginners to develop plugins.
Plan, produce, register, validate, and integrate UI, characters, scenes, animations, VFX, backgrounds, and reference-recreation assets for Phaser 4 games. Use for production visual assets, visual systems, asset integration, visual refactoring, runtime visual acceptance, and source/license registration; not for gameplay-rule changes alone.
Release and compliance role for Phaser 4 mobile 2D games. Use when preparing builds, store listings, privacy materials, asset licensing, submission checklists, and release candidate packages for mini-games, iOS, Google Play, or new channels.
Use when writing, reviewing, or debugging Vue.js forms that import vee-validate (useForm, defineField, useField, useFieldArray, Form, Field, FieldArray, ErrorMessage). Provides correct v4.15.x Composition API and component usage, validation schema patterns, typed-schema integration, version-specific API changes since 4.9, deprecations, and known pitfalls.
Expert real-time VFX artist specializing in particle systems, shader effects, and the invisible craft that makes games feel satisfying. Masters Niagara, VFX Graph, Godot GPU particles, and understands the AAA principles that make effects read clearly at 60fps. Use when "particle system, visual effects, vfx, particles, niagara, vfx graph, flipbook, sprite sheet, explosion effect, magic effect, trail effect, beam effect, dissolve, distortion, force field, hit effect, muzzle flash, impact effect, smoke particles, fire effect, soft particles, game juice, screen shake, particle overdraw, effect optimization, vfx, particles, effects, niagara, vfx-graph, game-juice, visual-effects, shaders, flipbook, trails, beams, explosions, optimization, gpu-particles" mentioned.
TypeScript patterns for low-level EVM blockchain interactions using Viem. Use when writing Node scripts, CLI tools, or backend services that read from or write to Ethereum or EVM chains. Applies to contract interactions, wallet operations, transaction signing, event watching, ABI encoding, or any non-React blockchain TypeScript code. Do NOT use for React/Next.js apps with hooks (use wagmi skill instead).
Invoked as "/windowsfy [path]" or when the user asks to "fix windows compatibility", "make package.json cross-platform", "windows portability", "run on windows", "cross-env", "shx", "PowerShell 5.1 error", "rm -rf on windows", "chmod on windows", "NODE_ENV not recognized", "glob not expanded on windows", "native binary on windows", "tfjs-node windows", "better-sqlite3 windows", "transformers windows", "token && is not a valid statement separator", "single quotes in npm scripts", or encounters npm script failures specific to Windows native shells. Path may be a directory, a single package.json file, or omitted (defaults to ./).
Apply opinionated rules and security patterns to JavaScript and TypeScript code that uses the xrpl.js client library to interact with the XRP Ledger. Use when users want to write a new XRPL integration with xrpl.js, review or refactor existing xrpl.js code, sign or submit a transaction, construct or credit a payment, work with issued currencies, AMM, NFToken, escrow, or payment channels, query account or ledger state, or audit an XRPL integration for security issues such as partial-payment inflation, missing LastLedgerSequence, missing DestinationTag, or unsafe key management.
Use when app feels slow, memory grows over time, battery drains fast, or you want to profile proactively - decision trees to choose the right Instruments tool, deep workflows for Time Profiler/Allocations/Core Data, and pressure scenarios for misinterpreting results
Builds AI agents on Cloudflare using the Agents SDK with state management, real-time WebSockets, scheduled tasks, tool integration, and chat capabilities. Generates production-ready agent code deployed to Workers. Use when: user wants to "build an agent", "AI agent", "chat agent", "stateful agent", mentions "Agents SDK", needs "real-time AI", "WebSocket AI", or asks about agent "state management", "scheduled tasks", or "tool calling". Biases towards retrieval from Cloudflare docs over pre-trained knowledge.
FrameVideo CLI dev loop — `npx framevideo` for scaffolding (init), validation (lint, inspect), preview, render, and environment troubleshooting (doctor, browser, info, upgrade). Use when running any of these commands or troubleshooting the FrameVideo build/render environment. For asset preprocessing commands (`tts`, `transcribe`, `remove-background`), invoke the `framevideo-media` skill instead.
Database patterns for Go services: database/sql, connection management, transactions, migrations, query builders, and ORM usage (sqlc, GORM, ent). Use when: "database access", "SQL query", "connection pool", "transactions", "database migration", "sqlc", "GORM", "ent", "prepared statement", "repository pattern". Not for: in-memory structures (go-data-structures), SQL security (go-security-audit), query profiling (go-performance-review)
Development assistant for the Kuikly Compose DSL framework. Helps with cross-platform UI development using Kuikly Compose DSL syntax, providing correct usage guidance and complete code examples for APIs such as Compose components, Modifier, animations, gestures, state management, navigation, and ViewModel. Use for Kuikly Compose page development, Compose component usage, layout implementation, animations, state management, and navigation routing while writing Kuikly Compose code. To use the traditional Kuikly DSL (attr/event syntax), use the kuikly-ui-framework skill.
MCP server building, advanced patterns, and security hardening. Use when building MCP servers, implementing tool handlers, choosing a transport, adding OAuth authentication, wiring MCP Apps UI with @mcp-ui, hardening MCP security, or debugging MCP integrations.
This skill should be used for project-level decisions about LLM-powered systems: whether an LLM is the right primitive for the task at hand, the shape of a multi-stage batch or agent pipeline, token and cost estimation, choosing between single-agent and multi-agent at the project level, structured output design for downstream parsing, and structuring agent-assisted iteration. Use this when the unit of work is a whole project or a multi-stage pipeline. Route individual tool design to tool-design and individual skill-loading or context-budget tactics to context-optimization.
Look up an R package's live status on cran.r-project.org - submission/review state (queue, human review, waiting, archived, past version's fate) or R CMD check results (OK/NOTE/WARN/ERROR per platform). Use for "what's the CRAN status of X", "did X get accepted/rejected", "is X passing CRAN checks", "when was version Y archived", "did win-builder get my package", "is win-builder processing my submission".
Search external libraries and frameworks using Sourcebot MCP. Use when researching external code patterns, library APIs, framework examples, or documentation from repositories like Effect-TS/effect, vercel/ai, tanstack/query. NEVER use for local project code.
Implements Syncfusion WPF DataGrid (SfDataGrid) component for displaying and manipulating tabular data in Windows Presentation Foundation applications. Use this when working with data grids, table views, or data binding scenarios. Supports sorting, filtering, grouping, editing, Excel/PDF export, drag and drop, master-detail views, summaries, and extensive styling options
Spec-driven feature work that freezes obligations instead of the plan: one human-reviewed plan with EARS criteria, path, entities, interface and one-way doors, then proof-backed checks, then build, then an independent Verifier. Use when the user says "tlc-spec-lean", "plan feature", "specify feature", "write the checks", "build this plan", or "verify work". Do NOT use for standalone design documents unattached to a feature, architecture decomposition analysis, or work that already has a task list or checklist to execute.
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.