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
Testability Obstacledotnet/skills>-01Testcontainerswshaddix/dotnet-skillsPatterns for using Testcontainers in .NET integration tests to spin up real dependencies like databases and message queues. Use when writing integration tests that require real databases, testing with message brokers like RabbitMQ or Kafka, or isolating test dependencies with Docker containers.04Testcontainers Integration Testsaaronontheweb/dotnet-skillsWrite integration tests using TestContainers for .NET with xUnit. Covers infrastructure testing with real databases, message queues, and caches in Docker containers instead of mocks.03Testimonial Collectorbrianrwagner/ai-marketing-claude-code-skillsSystematically gather, score, and format client testimonials. Use when someone needs social proof, wants to collect feedback, needs to turn happy clients into public advocates, or asks for help requesting or drafting a testimonial.02Testimonials Generatorkostja94/marketing-skillsWhen the user wants to add, optimize, or design customer testimonials, reviews, or case study sections. Also use when the user mentions "testimonials," "reviews," "customer quotes," "social proof," "case studies," "testimonial section," "customer reviews," "review schema," "testimonial design," or "social proof section." For case studies page, use customer-stories-page-generator.01Testingcodewithmukesh/dotnet-claude-kit>01Testinggrafana/skillsProbe, load-test, and instrument frontends from Grafana Cloud. Covers Synthetic Monitoring (HTTP / DNS / TCP / Ping / Traceroute / Multihttp / k6-browser scripted checks from 20+ global probes, alert on `probe_success` + TLS-cert expiry), Grafana Cloud k6 (distributed load tests across AWS load-zones, scenarios, `http_req_duration` thresholds, CI integration via `grafana/k6-action`), and Frontend Observability with Faro Web SDK (RUM, Core Web Vitals, custom events, `pushError`, distributed-trace correlation). Use when checking website / API uptime from multiple regions, gating a release on a load test, watching for TLS-cert renewal, instrumenting a React/Vue app, tracking Core Web Vitals, or correlating frontend errors to backend traces — even when the user says "is my login flow up?", "monitor my API", "ping our endpoint every minute", "release-gate load test", "browser performance monitoring", "session replay", or "RUM" without naming Synthetic Monitoring / k6 / Faro.05Testinglobehub/lobehubUse for Vitest tests, mocks, coverage and failing-test diagnosis.06Testingmindrally/skillsGeneral testing best practices and guidelines for writing comprehensive, maintainable tests across different testing frameworks and languages.01Testingrshankras/claude-code-apple-skillsTDD and testing skills for iOS/macOS apps. Covers characterization tests, TDD workflows, test contracts, snapshot tests, test infrastructure, and deterministic quality gates (fitness functions, coverage ratchet, mutation testing). Use for test-driven development, adding tests to existing code, or building test infrastructure.020Testingtursodatabase/tursoHow to write tests, when to use each type of test, and how to run them. Contains information about conversion of `.test` to `.sqltest`, and how to write `.sqltest` and rust tests01Testing Anti Patternsobra/superpowers-skillsNever test mock behavior. Never add test-only methods to production classes. Understand dependencies before mocking.01Testing API Authentication Weaknessesmukul975/anthropic-cybersecurity-skillsTests API authentication mechanisms for weaknesses including broken04Testing API For Broken Object Level Authorizationmukul975/anthropic-cybersecurity-skillsTests REST and GraphQL APIs for Broken Object Level Authorization (BOLA/IDOR,04Testing API Security With Owasp Top 10mukul975/anthropic-cybersecurity-skillsSystematically assesses REST, GraphQL, and gRPC API endpoints against the OWASP04Testing Best Practicesasyrafhussin/agent-skillsUnit testing, integration testing, and test-driven development principles. Use when writing tests, reviewing test code, improving test coverage, or setting up testing strategy. Triggers on "write tests", "review tests", "testing best practices", or "TDD".040Testing Blocksadobe/skillsUse this when you have made AEM Edge Delivery Services code changes to blocks, scripts, or styles and need to validate them before opening a pull request. Covers unit testing for utilities and logic, browser testing with Playwright, linting, and guidance on what to test and how.08Testing Cors Misconfigurationmukul975/anthropic-cybersecurity-skillsIdentifying and exploiting Cross-Origin Resource Sharing misconfigurations04Testing Craftjssblck/agentsUse when writing, reviewing, or refactoring tests, or choosing verification for a code change.07Testing Dagsastronomer/agentsComplex DAG testing workflows with debugging and fixing cycles. Use for multi-step testing requests like "test this dag and fix it if it fails", "test and debug", "run the pipeline and troubleshoot issues". For simple test requests ("test dag", "run dag"), the airflow entrypoint skill handles it directly. This skill is for iterative test-debug-fix cycles.01Testing For Broken Access Controlmukul975/anthropic-cybersecurity-skillsSystematically tests web applications and APIs for broken access control04Testing For JSON Web Token Vulnerabilitiesmukul975/anthropic-cybersecurity-skillsTests JWT implementations for algorithm confusion, "none" algorithm bypass,04Testing For Xss Vulnerabilitiesmukul975/anthropic-cybersecurity-skillsTests web applications for reflected, stored, and DOM-based Cross-Site04Testing Handbook Generatortrailofbits/skillsGenerates Claude Code skills from the Trail of Bits Testing Handbook (appsec.guide), analyzing handbook pages and emitting SKILL.md files with the structure each skill type requires. Use when creating or refreshing a skill from handbook content, or when the user names the testing handbook or appsec.guide. Not for answering security testing questions — the generated skills cover those.010Testing In Productionpetrkindlmann/qa-skills>-03Testing JWT Token Securitymukul975/anthropic-cybersecurity-skillsAssessing JSON Web Token implementations for cryptographic weaknesses,04Testing Patternssickn33/agentic-awesome-skillsJest testing patterns, factory functions, mocking strategies, and TDD workflow. Use when writing unit tests, creating test factories, or following TDD red-green-refactor cycle.01Testing R Packagesposit-dev/skillsBest practices for writing R package tests using testthat version 3+. Use when writing, organizing, or improving tests for R packages. Covers test structure, expectations, fixtures, snapshots, mocking, and modern testthat 3 patterns including self-sufficient tests, proper cleanup with withr, and snapshot testing.06Testing Setupandroid/skillsAnalyze and create a testing strategy for native Android apps - install04Testing Skills With Subagentsobra/superpowers-skillsRED-GREEN-REFACTOR for process documentation - baseline without skill, write addressing failures, iterate closing loopholes02Testing Strategyanthropics/knowledge-work-pluginsDesign test strategies and test plans. Trigger with "how should we test", "test strategy for", "write tests for", "test plan", "what tests do we need", or when the user needs help with testing approaches, coverage, or test architecture.01Tetrisbergside/awesome-design-skillsClassic block-game inspired design with playful colors, bold display fonts, and compact, high-energy layouts.02Text And Bitmaptextphaserjs/phaserUse this skill when displaying text in Phaser 4. Covers Text game objects, BitmapText, web fonts, text styling, word wrap, alignment, padding, and dynamic text content. Triggers on: Text, BitmapText, this.add.text, font, word wrap, text style.01Text Optimizerkochetkov-ma/claude-brewcodeOptimizes text, prompts, and documentation for LLM token efficiency. Applies 52 research-backed rules across 8 categories: Claude behavior, token efficiency, structure, deduplication, reference integrity, perception, LLM comprehension, and aggressive lossy (deep only). Use when optimizing prompts, reducing tokens, compressing verbose docs, or improving LLM instruction quality.04Text To Blenderroble3/cc-blender-skillDrive Blender from natural language. Converts plain-English requests ("model a sword and render it with cinematic lighting", "make this glass look frosted", "set up three-point lighting", "export this scene as glTF for the web") into Blender Python code executed via the Blender MCP server. Acts as the orchestrator that picks and chain-loads specialised sub-skills (blender-modeling, blender-materials, blender-lighting, blender-cameras, blender-rendering, blender-animation, blender-export, wireframe-to-3d, blender-pro-workflow, blender-skill-harmonizer, quality-refinement-autoloop). Use this skill whenever the user wants Claude to do anything in Blender, including creating geometry, applying materials, lighting a scene, framing a camera, rendering, animating, or exporting. Make sure to invoke this skill even if the user does not say "Blender" — also covers requests like "create a 3D model of...", "render this...", "make a glTF from...", "set up a scene with...", or any 3D-creation task. Requires the Blender MCP addon (ahujasid/blender-mcp) running on port 9876.037Text To Cad Harnessreason-machines/trending-skillsOpen source harness for generating 3D CAD models from text using AI coding agents with build123d/OpenCascade, exporting STEP/STL/URDF, and previewing in a local CAD Explorer viewer.01Text To Image Prompt Optimizermanzxiao/text-to-image-prompt-optimizer>07Text To Lottiediffusionstudio/lottieCreate, edit, or fix Lottie/Bodymovin JSON animations for the local Skia Skottie player. Use for text-to-Lottie, SVG/logo/type animation, loaders/icons, state feedback, UI microinteractions, lower thirds, diagrams, data/stat/chart animations, product promos, scene/camera motion, visual effects, scene edits, slots/controls, and Skottie debugging.023Text To Sfxsonilo-ai/skillsGenerate a sound effect from a text description using Sonilo — a UI chime, a whoosh, an impact, ambience, a stylized cue — when there is no video to match. Use when the user describes the sound they want in words, with or without a length. For SFX matched to footage, use the video-to-sfx skill; for music, use text-to-music.01Text To Speechcalesthio/openmontage|01Text To Speechelevenlabs/skillsConvert text to speech using ElevenLabs voice AI. Use when generating audio from text, creating voiceovers, building voice apps, or synthesizing speech in 70+ languages.04Text To Speechinference-sh/skillsConvert text to natural speech with Inworld TTS, ElevenLabs, DIA TTS, Kokoro, Chatterbox, and more via inference.sh CLI. Models: Inworld TTS-2 (100+ languages, emotion steering), Inworld TTS 1.5 (ultra-low latency), ElevenLabs (premium, 22+ voices, 32 languages), DIA TTS (conversational), Kokoro TTS, Chatterbox, Higgs Audio, VibeVoice (podcasts). Capabilities: text-to-speech, voice cloning, multi-speaker dialogue, podcast generation, expressive speech, emotion/delivery steering, character voices. Use for: voiceovers, audiobooks, podcasts, accessibility, video narration, IVR, voice assistants, gaming characters, avatar audio. Triggers: text to speech, tts, voice generation, ai voice, speech synthesis, voice over, generate speech, ai narrator, voice cloning, text to audio, elevenlabs, eleven labs, voice ai, ai voiceover, speech generator, natural voice, inworld, inworld tts, character voice, game voice, npc voice01Tg Bot Bindingstarchild-ai-agent/official-skills|02Tg Ws Proxy Telegram Socks5reason-machines/trending-skillsLocal SOCKS5 proxy server that accelerates Telegram Desktop by routing traffic through WebSocket connections to Telegram DCs01The Fooljeffallan/claude-skillsUse when challenging ideas, plans, decisions, or proposals using structured critical reasoning. Invoke to play devil's advocate, run a pre-mortem, red team, or audit evidence and assumptions.07The Newssfkislev/the-newsgives agents real-time and archival access to front-page headlines across 20 countries for breaking news, current events, and comparative media analysis.021Theme Detectortradermonty/claude-trading-skillsDetect and analyze trending market themes across sectors. Use when user asks about current market themes, trending sectors, sector rotation, thematic investing, what themes are hot or cold, or wants to identify bullish and bearish market narratives with lifecycle analysis.048Theme Factorycomposio-community/awesome-claude-pluginsToolkit for styling artifacts with a theme. These artifacts can be slides, docs, reportings, HTML landing pages, etc. There are 10 pre-set themes with colors/fonts that you can apply to any artifact that has been creating, or can generate a new theme on-the-fly.01
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