Skills
97,725 packaged capabilities and playbooks for agents. Install any of them with one command.
Development
Migrates Mojo code off legacy parametric closures (`capturing[_]`, `@__parameter` / `@parameter`, `api[fn](args)`) onto value-taking unified closures (`api(args, fn)` with `{imm}` / `{mut}` / `{var}` / named capture lists). Use when removing parametric overloads, fixing "capturing thin" conversion errors, rewriting nested launch/callback closures, or migrating any API that took a comptime function parameter. Also use when CI SIGSEGVs while compiling a Mojo object with `compile_offload_closure func must be fully bound` — that is host elaboration; verify with `kgen -elaborate`, not remote GPU execution.
Use this skill when the user asks to "add RUM", "set up RUM", "install the RUM SDK", "add Coralogix RUM to my app", "create a RUM API key", "RUM public key", "init Coralogix RUM", "CoralogixRum.init", "add the browser SDK", "real user monitoring", "frontend monitoring", "monitor my web app", "session replay", "track frontend errors", "add RUM to React", "add RUM to Next.js", "add RUM to my mobile app", or wants to instrument a browser or mobile application with Coralogix Real User Monitoring end to end - RUM API key, SDK install, init code, and verifying data arrives.
Define or refactor a shared frontend UI system before polishing one screen at a time. Use when the user needs token governance, visual-language rules, primitive naming, page-system direction, cross-product consistency, or a design handoff that should stay coherent across landing pages, dashboards, forms, and component libraries, including the reusable primitive/slot/variant APIs that system owns. Not for responsive layout-only fixes, accessibility-only remediation, or broad UI critique. Triggers on: design system, design tokens, visual language, component library foundations, UI governance, cross-product consistency, landing page plus dashboard system, primitive naming, token policy, component API architecture
Expert patterns for 3D level design using GridMap with MeshLibrary, CSG constructive solid geometry, occlusion, and runtime GridMap builders. Use when building 3D levels, modular tilesets, or BSP-style geometry. For sky/fog/Environment recipes, route to godot-3d-lighting. Trigger keywords: GridMap, MeshLibrary, set_cell_item, get_cell_item, map_to_local, local_to_map, CSGCombiner3D, CSGBox3D, CSGSphere3D, CSGPolygon3D, OccluderInstance3D, bake CSG.
Full-stack form handling for Inertia Rails: create, edit, delete, multi-step wizard, and file upload forms with validation errors and progress tracking. React examples inline; Vue and Svelte equivalents in references. Use when building any form, handling file uploads, multi-step forms, client-side validation, or wiring form submission to Rails controllers. NEVER react-hook-form. Use `<Form>` for simple forms, useForm for dynamic/programmatic control.
React composition patterns that scale. Use when refactoring components with boolean prop proliferation, building flexible component libraries, or designing reusable APIs. Triggers on tasks involving compound components, render props, context providers, or component architecture.
Rust build time optimization skill for reducing slow compilation. Use when using cargo-timings to profile builds, configuring sccache for Rust, using the Cranelift backend, splitting workspaces for parallelism, choosing between thin LTO and fat LTO, or using the mold linker with Rust. Activates on queries about slow Rust compilation, cargo-timings, sccache Rust, cranelift backend, Rust workspace splitting, LTO tradeoffs, or mold linker with Rust.
React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.
Use when you need to review, improve, or troubleshoot a Maven pom.xml file — including dependency management with BOMs, plugin configuration, version centralization, multi-module project structure, build profiles, or any situation where you want to align your Maven setup with industry best practices. This should trigger for requests such as Review pom.xml to improve it; Apply Maven best practices to pom.xml; Improve Maven POM configuration; Review Maven dependency management and plugin configuration; Modernize Maven build conventions for a Java project. Part of Plinth Toolkit
Design robust, scalable database schemas for SQL and NoSQL databases. Provides normalization guidelines, indexing strategies, migration patterns, constraint design, and performance optimization. Ensures data integrity, query performance, and maintainable data models
Expert blueprint for programmatic animation using Tween for smooth property transitions, UI effects, camera movements, and juice. Covers easing functions, parallel tweens, chaining, and lifecycle management. Use when implementing UI animations OR procedural movement. Keywords Tween, easing, interpolation, EASE_IN_OUT, TRANS_CUBIC, tween_property, tween_callback.
Read and set work state on the CLHbid Delivery board — the delivery language, issues via gh, the Status field, the board query recipes, cycles, epics, issue types, labels, the commit convention and the decomposition rules. Use for any GitHub issue or project-board operation in a clhbid repo, and for what a cycle, epic or slipped issue means.
Implements and debugs browser Language Detector API integrations in JavaScript or TypeScript web apps. Use when adding LanguageDetector support checks, availability and model download flows, session creation, detect() calls, input-usage measurement, permissions-policy handling, or compatibility fallbacks for built-in language detection. Don't use for server-side language detection SDKs, cloud translation services, or generic NLP pipelines
Guidance for searching ImageKit documentation with the search_docs tool — how to craft effective queries, select the right sources, and handle results. Use before calling search_docs to look up ImageKit features, APIs, configuration, pricing, or SDK examples.
TypeScript and JavaScript expert with deep knowledge of type-level programming, performance optimization, monorepo management, migration strategies, and modern tooling. Use PROACTIVELY for any TypeScript/JavaScript issues including complex type gymnastics, build performance, debugging, and architectural decisions. If a specialized expert is a better fit, I will recommend switching and stop.
Upgrade Solidity smart contracts using OpenZeppelin proxy patterns. Use when users need to: (1) make contracts upgradeable with UUPS, Transparent, or Beacon proxies, (2) write initializers instead of constructors, (3) use the Hardhat or Foundry upgrades plugins, (4) understand storage layout rules and ERC-7201 namespaced storage, (5) validate upgrade safety, (6) manage proxy deployments and upgrades, or (7) understand upgrade restrictions between OpenZeppelin Contracts major versions.
Implements and debugs browser Summarizer, Writer, and Rewriter integrations in JavaScript or TypeScript web apps. Use when adding availability checks, model download UX, session creation, summarize or write or rewrite flows, streaming output, abort handling, or permissions-policy constraints for built-in writing assistance APIs. Don't use for generic prompt engineering, server-side LLM SDKs, or cloud AI services
Chainlink Data Feeds on Hedera. Use when reading AggregatorV3 price feeds on Hedera (testnet 296 / mainnet 295), calling latestRoundData, checking round completeness and staleness, or normalizing feed decimals. Not for Chainlink CCIP (cross-chain tokens).
Expert architectural standards for building scalable Godot games (RPGs, platformers, shooters) using the composition pattern (Entity-Component). Use when designing player controllers, NPCs, enemies, weapons, or complex gameplay systems. Enforces "Has-A" relationships for game entities. Trigger keywords: Entity-Component, ECS, Gameplay, Actors, NPCs, Enemies, Weapons, Hitboxes, Game Loop, Level Design.
Builds sites, pages and components from Lucian UX/UI Prompt (lucianlabs.dev/uxui-prompt), a growing library of polished, dependency-free interactive UI elements with light and dark themes, keyboard and touch support and reduced motion. It covers buttons, toggles, inputs, menus and tabs, cards, sign-in and sign-up, toasts, loaders, empty and error states, charts, app-level tools like editors, dashboards, schedulers and kanban boards, and website sections and motion such as heroes, pricing, testimonials, sign-up forms, text and scroll animations, product showcases and animated charts. Searches the library, fetches only the chosen elements and ports them into the project's framework and theme. Use when the user names lucian-uxui, Lucian UX/UI or lucianlabs elements, or asks to build UI that should use them, e.g. "build a landing page with lucian-uxui", "lucian-uxui 스킬로 사이트 만들어줘", "루샨 UX/UI 요소로 로그인 화면 만들어줘". Not for backend work or for editing the library itself.
Pyth pull price feeds on Hedera. Use when integrating Pyth on Hedera (testnet 296 / mainnet 295), fetching Hermes update payloads, paying updatePriceFeeds, calling getPriceNoOlderThan, checking confidence, or normalizing signed price + expo to 18 decimals.
Guidance for building ImageKit image/video transformation URLs with the transformation_builder tool — how the tool works, how to write a good query, how to order multi-step chains, and a reference of every supported parameter. Use before calling transformation_builder. Covers resize/crop/focus, AI edits (change objects, colors, styles), background removal/replacement, generative fill, upscaling, retouching, drop shadows, variations, effects (blur/sharpen/rotate/border/color-replace/gradient), image/text/video overlays, and video transforms.
File a bug report or feedback on the Antithesis skills by opening a pre-filled GitHub issue URL (skill name, skill version, agent, short summary). Load when the user wants to report a problem with, or give feedback on, any Antithesis skill. Does not auto-submit — presents the URL for the user to review.
Diagnoses and repairs repository setup and guarded Git workflows for Claude Code or Codex — environment repair, startup sync, hook auditing, collaborator handoff. Use when a repo won't run, a teammate onboards, hook output duplicates, or commit/push/conflict needs guarding. Not for lost-commit recovery (use git-safety-net), GitHub ops (use github-ops), or history scrubbing (use github-sensitive-data-cleanup).
Chainlink CCIP cross-chain tokens on Hedera. Use when bridging burn-and-mint CCT between Hedera and EVM, registering TokenAdminRegistry / pools, calling ccipSend with chain selectors, or wiring HTS-backed wrappers (HtsBurnMintERC20) rather than vanilla BurnMintERC20. Not for Chainlink Data Feeds / price oracles
Deep contextual grep for codebases. Expert at finding patterns, architectures, implementations, and answering "Where is X?", "Which file has Y?", and "Find code that does Z" questions. Use when exploring unfamiliar codebases, finding specific implementations, understanding code organization, discovering patterns across multiple files, or locating functionality in a project. Supports three thoroughness levels quick, medium, very thorough.
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.