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Agent Skills

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specify-resources

Shared resources (scripts, templates) for Spec-Driven Development workflow. This skill is a dependency for all spec-* skills and should NOT be invoked directly by users. It provides bash scripts for feature branch management, prerequisite checking, and templates for specifications, plans, tasks, and checklists.

xfstudio
xfstudio
4

spec-taskstoissues

Convert tasks.md into GitHub issues with proper dependencies. Use when user says "/spec-taskstoissues", "create GitHub issues", "convert tasks to issues" after /spec-tasks when using GitHub for project management.

xfstudio
xfstudio
4

spec-tasks

Generate actionable, dependency-ordered tasks.md organized by user story. Use when user says "/spec-tasks", "create tasks", "generate task list" after /spec-plan to prepare for implementation.

xfstudio
xfstudio
4

spec-specify

Create or update a feature specification from a natural language description. Use when user says "/spec-specify", "create a spec", "write a specification", "I want to build...", or describes a new feature to implement. This is the FIRST step in the Spec-Driven Development workflow.

xfstudio
xfstudio
4

spec-plan

Execute implementation planning workflow to generate design artifacts (research.md, data-model.md, contracts/, quickstart.md). Use when user says "/spec-plan", "create a plan", "plan the implementation" after /spec-specify or /spec-clarify.

xfstudio
xfstudio
4

web-design-guidelines

Review UI code for Web Interface Guidelines compliance. Use when asked to "review my UI", "check accessibility", "audit design", "review UX", or "check my site against best practices".

xfstudio
xfstudio
4

similarity-search-patterns

Implement efficient similarity search with vector databases. Use when building semantic search, implementing nearest neighbor queries, or optimizing retrieval performance.

xfstudio
xfstudio
4

skill-creator

Guide for creating effective skills. This skill should be used when users want to create a new skill (or update an existing skill) that extends Claude's capabilities with specialized knowledge, workflows, or tool integrations.

xfstudio
xfstudio
4

skill-developer

Create and manage Claude Code skills following Anthropic best practices. Use when creating new skills, modifying skill-rules.json, understanding trigger patterns, working with hooks, debugging skill activation, or implementing progressive disclosure. Covers skill structure, YAML frontmatter, trigger types (keywords, intent patterns, file paths, content patterns), enforcement levels (block, suggest, warn), hook mechanisms (UserPromptSubmit, PreToolUse), session tracking, and the 500-line rule.

xfstudio
xfstudio
4

skill-rails-upgrade

Analyze Rails apps and provide upgrade assessments

xfstudio
xfstudio
4

skill-seekers

-Automatically convert documentation websites, GitHub repositories, and PDFs into Claude AI skills in minutes.

xfstudio
xfstudio
4

slack-bot-builder

Build Slack apps using the Bolt framework across Python, JavaScript, and Java. Covers Block Kit for rich UIs, interactive components, slash commands, event handling, OAuth installation flows, and Workflow Builder integration. Focus on best practices for production-ready Slack apps. Use when: slack bot, slack app, bolt framework, block kit, slash command.

xfstudio
xfstudio
4

slack-gif-creator

Knowledge and utilities for creating animated GIFs optimized for Slack. Provides constraints, validation tools, and animation concepts. Use when users request animated GIFs for Slack like "make me a GIF of X doing Y for Slack."

xfstudio
xfstudio
4

slo-implementation

Define and implement Service Level Indicators (SLIs) and Service Level Objectives (SLOs) with error budgets and alerting. Use when establishing reliability targets, implementing SRE practices, or measuring service performance.

xfstudio
xfstudio
4

SMTP Penetration Testing

This skill should be used when the user asks to "perform SMTP penetration testing", "enumerate email users", "test for open mail relays", "grab SMTP banners", "brute force email credentials", or "assess mail server security". It provides comprehensive techniques for testing SMTP server security.

zebbern
zebbern
4

social-content

When the user wants help creating, scheduling, or optimizing social media content for LinkedIn, Twitter/X, Instagram, TikTok, Facebook, or other platforms. Also use when the user mentions 'LinkedIn post,' 'Twitter thread,' 'social media,' 'content calendar,' 'social scheduling,' 'engagement,' or 'viral content.' This skill covers content creation, repurposing, and platform-specific strategies.

xfstudio
xfstudio
4

software-architecture

Guide for quality focused software architecture. This skill should be used when users want to write code, design architecture, analyze code, in any case that relates to software development.

xfstudio
xfstudio
4

solidity-security

Master smart contract security best practices to prevent common vulnerabilities and implement secure Solidity patterns. Use when writing smart contracts, auditing existing contracts, or implementing security measures for blockchain applications.

xfstudio
xfstudio
4

spark-optimization

Optimize Apache Spark jobs with partitioning, caching, shuffle optimization, and memory tuning. Use when improving Spark performance, debugging slow jobs, or scaling data processing pipelines.

xfstudio
xfstudio
4

spec-analyze

Perform non-destructive cross-artifact consistency and quality analysis across spec.md, plan.md, and tasks.md. Use when user says "/spec-analyze", "analyze the spec", "check consistency" after /spec-tasks to identify issues before implementation.

xfstudio
xfstudio
4

spec-checklist

Generate custom quality checklists that validate REQUIREMENTS quality (not implementation). Use when user says "/spec-checklist", "create checklist for [domain]" to validate specification completeness before implementation.

xfstudio
xfstudio
4

spec-clarify

Identify underspecified areas in a feature spec by asking up to 5 targeted clarification questions and encoding answers into the spec. Use when user says "/spec-clarify", "clarify the spec", or after /spec-specify to reduce ambiguity before /spec-plan.

xfstudio
xfstudio
4

spec-constitution

Create or update the project constitution with core principles and governance rules. Use when user says "/spec-constitution", "create constitution", "update principles", or needs project-wide development standards. Constitution is referenced by all other spec commands.

xfstudio
xfstudio
4

spec-implement

Execute implementation by processing tasks defined in tasks.md. Use when user says "/spec-implement", "implement the feature", "start coding" after /spec-tasks to begin phase-by-phase implementation.

xfstudio
xfstudio
4

using-neon

Guides and best practices for working with Neon Serverless Postgres. Covers getting started, local development with Neon, choosing a connection method, Neon features, authentication (@neondatabase/auth), PostgREST-style data API (@neondatabase/neon-js), Neon CLI, and Neon's Platform API/SDKs. Use for any Neon-related questions.

xfstudio
xfstudio
4

using-superpowers

Use when starting any conversation - establishes how to find and use skills, requiring Skill tool invocation before ANY response including clarifying questions

xfstudio
xfstudio
4

uv-package-manager

Master the uv package manager for fast Python dependency management, virtual environments, and modern Python project workflows. Use when setting up Python projects, managing dependencies, or optimizing Python development workflows with uv.

xfstudio
xfstudio
4

varlock-claude-skill

Secure environment variable management ensuring secrets are never exposed in Claude sessions, terminals, logs, or git commits

xfstudio
xfstudio
4

vector-database-engineer

Expert in vector databases, embedding strategies, and semantic search implementation. Masters Pinecone, Weaviate, Qdrant, Milvus, and pgvector for RAG applications, recommendation systems, and similar

xfstudio
xfstudio
4

vector-index-tuning

Optimize vector index performance for latency, recall, and memory. Use when tuning HNSW parameters, selecting quantization strategies, or scaling vector search infrastructure.

xfstudio
xfstudio
4

vercel-deploy-claimable

Deploy applications and websites to Vercel. Use this skill when the user requests deployment actions such as 'Deploy my app', 'Deploy this to production', 'Create a preview deployment', 'Deploy and give me the link', or 'Push this live'. No authentication required - returns preview URL and claimable deployment link.

xfstudio
xfstudio
4

vercel-deployment

Expert knowledge for deploying to Vercel with Next.js Use when: vercel, deploy, deployment, hosting, production.

xfstudio
xfstudio
4

verification-before-completion

Use when about to claim work is complete, fixed, or passing, before committing or creating PRs - requires running verification commands and confirming output before making any success claims; evidence before assertions always

xfstudio
xfstudio
4

vexor

Vector-powered CLI for semantic file search with a Claude/Codex skill

xfstudio
xfstudio
4

video-downloader

Downloads videos from YouTube and other platforms for offline viewing, editing, or archival. Handles various formats and quality options.

xfstudio
xfstudio
4

viral-generator-builder

Expert in building shareable generator tools that go viral - name generators, quiz makers, avatar creators, personality tests, and calculator tools. Covers the psychology of sharing, viral mechanics, and building tools people can't resist sharing with friends. Use when: generator tool, quiz maker, name generator, avatar creator, viral tool.

xfstudio
xfstudio
4

voice-agents

Voice agents represent the frontier of AI interaction - humans speaking naturally with AI systems. The challenge isn't just speech recognition and synthesis, it's achieving natural conversation flow with sub-800ms latency while handling interruptions, background noise, and emotional nuance. This skill covers two architectures: speech-to-speech (OpenAI Realtime API, lowest latency, most natural) and pipeline (STT→LLM→TTS, more control, easier to debug). Key insight: latency is the constraint. Hu

xfstudio
xfstudio
4

voice-ai-development

Expert in building voice AI applications - from real-time voice agents to voice-enabled apps. Covers OpenAI Realtime API, Vapi for voice agents, Deepgram for transcription, ElevenLabs for synthesis, LiveKit for real-time infrastructure, and WebRTC fundamentals. Knows how to build low-latency, production-ready voice experiences. Use when: voice ai, voice agent, speech to text, text to speech, realtime voice.

xfstudio
xfstudio
4

voice-ai-engine-development

Build real-time conversational AI voice engines using async worker pipelines, streaming transcription, LLM agents, and TTS synthesis with interrupt handling and multi-provider support

xfstudio
xfstudio
4

vulnerability-scanner

Advanced vulnerability analysis principles. OWASP 2025, Supply Chain Security, attack surface mapping, risk prioritization.

xfstudio
xfstudio
4

wcag-audit-patterns

Conduct WCAG 2.2 accessibility audits with automated testing, manual verification, and remediation guidance. Use when auditing websites for accessibility, fixing WCAG violations, or implementing accessible design patterns.

xfstudio
xfstudio
4

web-artifacts-builder

Suite of tools for creating elaborate, multi-component claude.ai HTML artifacts using modern frontend web technologies (React, Tailwind CSS, shadcn/ui). Use for complex artifacts requiring state management, routing, or shadcn/ui components - not for simple single-file HTML/JSX artifacts.

xfstudio
xfstudio
4

Cross-Site Scripting and HTML Injection Testing

This skill should be used when the user asks to "test for XSS vulnerabilities", "perform cross-site scripting attacks", "identify HTML injection flaws", "exploit client-side injection vulnerabilities", "steal cookies via XSS", or "bypass content security policies". It provides comprehensive techniques for detecting, exploiting, and understanding XSS and HTML injection attack vectors in web applications.

zebbern
zebbern
4

xlsx

Comprehensive spreadsheet creation, editing, and analysis with support for formulas, formatting, data analysis, and visualization. When Claude needs to work with spreadsheets (.xlsx, .xlsm, .csv, .tsv, etc) for: (1) Creating new spreadsheets with formulas and formatting, (2) Reading or analyzing data, (3) Modify existing spreadsheets while preserving formulas, (4) Data analysis and visualization in spreadsheets, or (5) Recalculating formulas

xfstudio
xfstudio
4

x-article-publisher-skill

Publish articles to X/Twitter

xfstudio
xfstudio
4

writing-skills

Use when creating, updating, or improving agent skills.

ozy
ozy
4

writing-plans

Use when you have a spec or requirements for a multi-step task, before touching code

xfstudio
xfstudio
4

workflow-patterns

Use this skill when implementing tasks according to Conductor's TDD

xfstudio
xfstudio
4

workflow-orchestration-patterns

Design durable workflows with Temporal for distributed systems. Covers workflow vs activity separation, saga patterns, state management, and determinism constraints. Use when building long-running processes, distributed transactions, or microservice orchestration.

xfstudio
xfstudio
4

workflow-automation

Workflow automation is the infrastructure that makes AI agents reliable. Without durable execution, a network hiccup during a 10-step payment flow means lost money and angry customers. With it, workflows resume exactly where they left off. This skill covers the platforms (n8n, Temporal, Inngest) and patterns (sequential, parallel, orchestrator-worker) that turn brittle scripts into production-grade automation. Key insight: The platforms make different tradeoffs. n8n optimizes for accessibility

xfstudio
xfstudio
4

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Adoption

Agent Skills are supported by leading AI development tools.

FAQ

Frequently asked questions about Agent Skills.

01

What are Agent Skills?

Agent Skills are reusable, production-ready capability packs for AI agents. Each skill lives in its own folder and is described by a SKILL.md file with metadata and instructions.

02

What does this agent-skills.md site do?

Agent Skills is a curated directory that indexes skill repositories and lets you browse, preview, and download skills in a consistent format.

03

Where are skills stored in a repo?

By default, the site scans the skills/ folder. You can also submit a URL that points directly to a specific skills folder.

04

What is required inside SKILL.md?

SKILL.md must include YAML frontmatter with at least name and description. The body contains the actual guidance and steps for the agent.

05

How can I submit a repo?

Click Submit in the header and paste a GitHub URL that points to a skills folder. We’ll parse it and add any valid skills to the directory.