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.
1,243Skills
154Publishers
203Official
Firebase AI Logic Basicsfirebase/agent-skillsOfficialOfficial skill for integrating Firebase AI Logic (Gemini API) into web applications. Covers setup, multimodal inference, structured output, and security.6205Firebase Data Connectfirebase/agent-skillsOfficialBuilds and deploys Firebase SQL Connect (aka Firebase Data Connect) backends with PostgreSQL securely. Use when designing schemas with tables and relations, writing authorized queries and mutations, configuring real-time data updates, or generating type-safe SDKs. Use when you need a relational database with Firebase, or when the user mentions SQL Connect or Data Connect.62017Extension To Functions Codebasefirebase/agent-skillsOfficialSkill for converting an installed Firebase Extension (or extension source) into a standalone Cloud Functions for Firebase codebase or publishable npm package, including V1 to V2 trigger upgrades, lifecycle hooks, and declarative security6194Frontend UI Engineeringaddyosmani/agent-skillsBuilds production-quality, accessible, responsive user-facing UIs. Use when building or modifying interfaces and pages, creating components, implementing layouts, meeting WCAG accessibility requirements, managing state, or when the output needs to look and feel production-quality rather than AI-generated.6141Xlsxanthropics/skillsOfficialUse this skill any time a spreadsheet file is the primary input or output. This means any task where the user wants to: open, read, edit, or fix an existing .xlsx, .xlsm, .xltx, .csv, or .tsv file (e.g., adding columns, computing formulas, formatting, charting, cleaning messy data); create a new spreadsheet from scratch or from other data sources; or convert between tabular file formats. Trigger especially when the user references a spreadsheet file by name or path — even casually (like \"the xlsx in my downloads\") — and wants something done to it or produced from it. Also trigger for cleaning or restructuring messy tabular data files (malformed rows, misplaced headers, junk data) into proper spreadsheets. The deliverable must be a spreadsheet file. Do NOT trigger when the primary deliverable is a Word document, HTML report, standalone Python script, database pipeline, or Google Sheets API integration, even if tabular data is involved.60453Docxanthropics/skillsOfficialUse this skill whenever the user wants to create, read, edit, or manipulate Word documents (.docx files) or Word templates (.dotx files). Triggers include: any mention of 'Word doc', 'word document', '.docx', '.dotx', or requests to produce professional documents with formatting like tables of contents, headings, page numbers, or letterheads. Also use when extracting or reorganizing content from .docx or .dotx files, inserting or replacing images in documents, performing find-and-replace in Word files, working with tracked changes or comments, or converting content into a polished Word document. If the user asks for a 'report', 'memo', 'letter', 'template', or similar deliverable as a Word or .docx file, use this skill. Do NOT use for PDFs, spreadsheets, Google Docs, or general coding tasks unrelated to document generation.60361Performance Optimizationaddyosmani/agent-skillsOptimizes application performance across frontend, backend, queries, and databases. Use when performance requirements exist, when you suspect performance regressions, when Core Web Vitals or load times need improvement, when N+1 query patterns need fixing, or when profiling reveals bottlenecks.5971Documentation And Adrsaddyosmani/agent-skillsRecords decisions and documentation. Use when you need to document an architecture decision (ADR) or the reasoning behind a design choice, when changing public APIs, shipping features, or when you need to record context that future engineers and agents will need to understand the codebase.5911Spec Driven Developmentaddyosmani/agent-skillsCreates specs before coding. Use when starting a new project, feature, or significant change and no specification exists yet. Use when drafting a PRD or requirements document with objectives and scope, or when requirements are unclear, ambiguous, or only exist as a vague idea. Use when a single requirement spans several independently testable capabilities and needs decomposing into a capability map of modules before specifying.5891AI Image Generationprime-skills/runcomfy-agent-skills>5871API And Interface Designaddyosmani/agent-skillsGuides stable API and interface design. Use when designing APIs, module boundaries, or any public interface. Use when creating REST or GraphQL endpoints, defining type contracts between modules, or establishing boundaries between frontend and backend.5851PDFanthropics/skillsOfficialUse this skill whenever the user wants to do anything with PDF files. This includes reading or extracting text/tables from PDFs, combining or merging multiple PDFs into one, splitting PDFs apart, rotating pages, adding watermarks, creating new PDFs, filling PDF forms, encrypting/decrypting PDFs, extracting images, and OCR on scanned PDFs to make them searchable. If the user mentions a .pdf file or asks to produce one, use this skill.58512Planning And Task Breakdownaddyosmani/agent-skillsBreaks work into ordered tasks. Use when you have a spec or clear requirements and need to break work into implementable tasks. Use when a task feels too large to start, when you need to estimate scope, or when parallel work is possible.5831Nano Banana 2prime-skills/runcomfy-agent-skills>5801Video Editprime-skills/runcomfy-agent-skills>5801Gpt Image 2prime-skills/runcomfy-agent-skills>5791AI Video Generationprime-skills/runcomfy-agent-skills>5781Image Editprime-skills/runcomfy-agent-skills>5781Debugging And Error Recoveryaddyosmani/agent-skillsGuides systematic root-cause debugging. Use when tests fail, builds break, something that worked yesterday broke, behavior doesn't match expectations, or you encounter any unexpected error. Use when you need to figure out what broke and why — a systematic approach to finding and fixing the root cause rather than guessing.5771Kling 3 0prime-skills/runcomfy-agent-skills>5771Context Engineeringaddyosmani/agent-skillsOptimizes agent context setup. Use when starting a new session, when agent output quality degrades, when switching between tasks, or when you need to configure rules files and context for a project.5761AI Avatar Videoprime-skills/runcomfy-agent-skills>5751AI Musicprime-skills/runcomfy-agent-skills>5751AI SEOcoreyhaines31/marketingskillsWhen the user wants to optimize content for AI search engines, get cited by LLMs, or appear in AI-generated answers. Also use when the user mentions 'AI SEO,' 'AEO,' 'GEO,' 'LLMO,' 'answer engine optimization,' 'generative engine optimization,' 'LLM optimization,' 'AI Overviews,' 'optimize for ChatGPT,' 'optimize for Perplexity,' 'AI citations,' 'AI visibility,' 'zero-click search,' 'how do I show up in AI answers,' 'LLM mentions,' 'optimize for Claude/Gemini,' 'llms.txt,' 'llms-full.txt,' 'OKF,' 'Open Knowledge Format,' 'knowledge bundle,' 'agent-readable site,' 'agent readiness,' 'is my site agent-ready,' 'WebMCP,' 'do listicles still work for AI,' 'ChatGPT stopped citing comparison pages,' or 'AI citation format shift.' Use this whenever someone wants their content to be cited or surfaced by AI assistants and AI search engines. For traditional technical and on-page SEO audits, see seo-audit. For structured data implementation, see schema.57510Image To Videoprime-skills/runcomfy-agent-skills>5751Interview Meaddyosmani/agent-skillsExtracts what the user actually wants instead of what they think they should want. Achieves this through one-question-at-a-time interview until ~95% confidence about the underlying intent. Use when an ask is underspecified ("build me X" without "for whom" or "why now"), when the user explicitly invokes ("interview me", "grill me", "are we sure?", "stress-test my thinking"), or when you catch yourself silently filling in ambiguous requirements before any plan, spec, or code exists.5751Codex Petprime-skills/runcomfy-agent-skills>5741Elevenlabs Music Generationprime-skills/runcomfy-agent-skills>5741Runcomfy CLIprime-skills/runcomfy-agent-skills>5741Video Inpaintingprime-skills/runcomfy-agent-skills>5741Code Simplificationaddyosmani/agent-skillsSimplifies code for clarity. Use when refactoring code for clarity without changing behavior. Use when code works but is harder to read, maintain, or extend than it should be. Use when reviewing code that has accumulated unnecessary complexity.5731Flux Kontextprime-skills/runcomfy-agent-skills>5731Image Outpaintingprime-skills/runcomfy-agent-skills>5731Lipsyncprime-skills/runcomfy-agent-skills>5731Nano Banana Editprime-skills/runcomfy-agent-skills>5731Image Inpaintingprime-skills/runcomfy-agent-skills>5721Seedance V2prime-skills/runcomfy-agent-skills>5721Video Extendprime-skills/runcomfy-agent-skills>5721Wan 2 7prime-skills/runcomfy-agent-skills>5721Ace Stepprime-skills/runcomfy-agent-skills>5711Controlnet Poseprime-skills/runcomfy-agent-skills>5711Face Swapprime-skills/runcomfy-agent-skills>5711Flux 2 Kleinprime-skills/runcomfy-agent-skills>5711Gpt Image Editprime-skills/runcomfy-agent-skills>5711Happyhorse 1 0prime-skills/runcomfy-agent-skills>5711Relightprime-skills/runcomfy-agent-skills>5711Video Outpaintingprime-skills/runcomfy-agent-skills>5711Test Driven Developmentaddyosmani/agent-skillsDrives development with tests using the red-green-refactor loop. Use when implementing any logic, fixing any bug, or changing any behavior. Use when you need to prove that code works, when a bug report arrives, or when you're about to modify existing functionality.5701