Skill directory

Agent skills

Focused instruction packs that teach a coding agent one job well. Browse the catalog and use any of them inside a RiverX project.

18,175Skills

1,902Publishers

249Official

18,175 skills

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Universal Patternsdylantarre/animation-principlesUse when creating any animation type - provides foundational timing, easing, and principle application that applies to all motion in interfaces.01 Universal Practitionerdylantarre/animation-principlesUse when applying animation principles in any context, for any role, or when a general understanding of Disney's 12 principles is needed.01 Universal Solutionsdylantarre/animation-principlesUse when facing any animation problem as a comprehensive diagnostic framework01 Universal Timingdylantarre/animation-principlesUse when learning animation timing fundamentals - principles that apply regardless of duration, the foundational rules that scale across all time ranges01 Universal Tooldylantarre/animation-principlesUse when implementing Disney's 12 animation principles with any animation tool or framework01 Uniwinduni-stack/uniwind>010 Unix Goto Developmentmanutej/luxor-claude-marketplaceExpert guidance for unix-goto shell navigation tool development, including architecture, 9-step feature workflow, testing (100% coverage), performance optimization (<100ms targets), and Linear issue integration02 Unjshairyf/skillsUnJS ecosystem - agnostic JavaScript libraries, tools, and utilities. Use when working with UnJS packages like h3, nitro, ofetch, unstorage, or building universal JavaScript applications.066 Unocssantfu/skillsUnoCSS instant atomic CSS engine, superset of Tailwind CSS. Use when configuring UnoCSS, writing utility rules, shortcuts, or working with presets like Wind, Icons, Attributify.025 Unocssuni-helper/skillsUnoCSS instant atomic CSS engine, superset of Tailwind CSS. Use when configuring UnoCSS, writing utility rules, shortcuts, or working with presets like Wind, Icons, Attributify.027 Unreal Behavior Treesgamedev-skills/awesome-gamedev-agent-skills>02 Unreal Blueprintsgamedev-skills/awesome-gamedev-agent-skills>02 Unreal Cpp Gameplaygamedev-skills/awesome-gamedev-agent-skills>02 Unreal Enginedstn2000/claude-unreal-engine-skill>05 Unreal Engine Cpp Prosickn33/agentic-awesome-skillsExpert guide for Unreal Engine 5.x C++ development, covering UObject hygiene, performance patterns, and best practices.03 Unreal Enhanced Inputgamedev-skills/awesome-gamedev-agent-skills>02 Unreal Niagaragamedev-skills/awesome-gamedev-agent-skills>01 Unreal Packaginggamedev-skills/awesome-gamedev-agent-skills>01 Unsafe Checkeractionbook/rust-skillsCRITICAL: Use for unsafe Rust code review and FFI. Triggers on: unsafe, raw pointer, FFI, extern, transmute, *mut, *const, union, #[repr(C)], libc, std::ffi, MaybeUninit, NonNull, SAFETY comment, soundness, undefined behavior, UB, safe wrapper, memory layout, bindgen, cbindgen, CString, CStr, 安全抽象, 裸指针, 外部函数接口, 内存布局, 不安全代码, FFI 绑定, 未定义行为057 Unsloppoteto/noodle>-01 Unsloptheclaymethod/unslopRemove AI writing patterns from prose using either audit-only detection or a two-pass rewrite flow (diagnosis then reconstruction). Use this skill when editing, reviewing, or rewriting AI-generated content to make it sound human. Triggers on requests to "humanize", "de-slop", "fix AI text", "make it sound human", "remove AI patterns", or when reviewing text that contains obvious AI tells like "Here's the thing:", "Let that sink in", or "In today's fast-paced landscape". Also use when the user pastes text and says it "sounds like ChatGPT", "sounds robotic", "needs to sound more natural", or asks you to "clean up" drafted content before publishing.0439 Unslothdavila7/claude-code-templatesExpert guidance for fast fine-tuning with Unsloth - 2-5x faster training, 50-80% less memory, LoRA/QLoRA optimization05 Unslothorchestra-research/ai-research-skillsExpert guidance for fast fine-tuning with Unsloth - 2-5x faster training, 50-80% less memory, LoRA/QLoRA optimization05 Unsplashcevatkerim/skillsSearch and fetch photos from Unsplash with proper attribution. Use when users need images for content, want photos by keyword, need random images for variety, or ask for stock photos. Automatically provides attribution required by Unsplash guidelines.010 Unsplash Asset Imagesmengto/skillsUse when you need to pick high-quality Unsplash images for product/design assets (avatars, headshots, portraits, large website backgrounds, and abstract wallpapers) and output real Unsplash URLs plus practical instructions for producing the right resolutions and aspect ratios (1:1, 4:5, 3:4, 16:9, 9:16).04 Upbitstarchild-ai-agent/official-skills|016 Upbitupbit-official/upbit-agent-skills>015 Updateanthropics/knowledge-work-pluginsSync tasks and refresh memory from your current activity. Use when pulling new assignments from your project tracker into TASKS.md, triaging stale or overdue tasks, filling memory gaps for unknown people or projects, or running a comprehensive scan to catch todos buried in chat and email.01 Updateassistant-ui/skillsUpgrades an existing assistant-ui application and applies the migrations needed to reach the current AI SDK v7 and assistant-ui 0.15.x lines. Use when updating, bumping, or migrating @assistant-ui/react, @assistant-ui/ai-sdk, the older @assistant-ui/react-ai-sdk alias, ai, or @ai-sdk/react, or when an upgrade exposes removed hooks, scope accessor calls, provider configuration, registry paths, event names, legacy interactables, or tool registrations. Start here for an existing project, post-update type failures, package compatibility, CLI codemods, and version-specific migration order. For a first install or a new project use setup; for authoring a runtime without an upgrade use runtime.04 Update Avm Modules In Bicepgithub/awesome-copilotUpdate Azure Verified Modules (AVM) to latest versions in Bicep files.01 Update Chrome Binaries Test Regionremotion-dev/remotionPublish Remotion Lambda Chrome binaries to the eu-central-1 test region and update hosted layer and Chrome version references. Use when updating Chrome binaries before full regional rollout.01 Update Claudefandhe-ai/agent-cli-skills>02 Update Docsfandhe-ai/agent-cli-skills>02 Update Docsneolabhq/context-engineering-kitUpdate and maintain project documentation for local code changes using multi-agent workflow with tech-writer agents. Covers docs/, READMEs, JSDoc, and API documentation.01 Update Implementation Plangithub/awesome-copilotUpdate an existing implementation plan file with new or update requirements to provide new features, refactoring existing code or upgrading packages, design, architecture or infrastructure.01 Update Issue Treefandhe-ai/agent-cli-skills>07 Update Llmsgithub/awesome-copilotUpdate the llms.txt file in the root folder to reflect changes in documentation or specifications following the llms.txt specification at https://llmstxt.org/01 Update Markdown File Indexgithub/awesome-copilotUpdate a markdown file section with an index/table of files from a specified folder.01 Update Oo Component Documentationgithub/awesome-copilotUpdate existing object-oriented component documentation following industry best practices and architectural documentation standards.01 Update Screenshotsmicrosoft/vscodeUpdate the committed blocks-ci screenshot hashes after the "Screenshots & Tests" check fails, or investigate a screenshot diff reported on a PR. Use when asked to update, accept, or refresh component screenshot baselines from CI. This skill should be run as a subagent.01 Update Skillwarpdotdev/common-skillsCreate or update skills by generating, editing, or refining SKILL.md files in this repository. Use when authoring new skills or revising the structure, frontmatter, or guidance for existing ones.02 Update Skills From Changelogelevenlabs/skills>01 Update Specificationgithub/awesome-copilotUpdate an existing specification file for the solution, optimized for Generative AI consumption based on new requirements or updates to any existing code.01 Update Starsremotion-dev/remotionUpdate Remotion homepage GitHub star counts. Use when asked to refresh the displayed GitHub star count and push the change to main.01 Update Swiftui Apisavdlee/swiftui-agent-skillScan Apple's SwiftUI documentation for deprecated APIs and update the SwiftUI Expert Skill with modern replacements. Use when asked to "update latest APIs", "refresh deprecated SwiftUI APIs", "check for new SwiftUI deprecations", "scan for API changes", or after a new iOS/Xcode release. Requires the Sosumi MCP to be available.02 Update Versionremotion-dev/remotionUpdate `AvailableFrom` in a PR to the next Remotion patch version (`main` + `0.0.1`).01 Upgrade Browser SDK V7datadog-labs/agent-skills>01 Upgrade Caniuseremotion-dev/remotionUpgrade the caniuse-lite override in the Remotion repo. Use when asked to update caniuse-lite to the latest npm version.01

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