Claude Skills
The open format is called Agent Skills and works in Claude Code, Codex, Cursor and other agents — most people know it as Claude Skills.
Every Agent Skill we could find on GitHub, deduplicated by content. 79 354 files from 1 739 authors, of which 61 713 are unique — the rest is the same skill repackaged into someone else's repository. For each one: what it weighs in tokens, whether it ships runnable scripts, and which MCP servers it needs.
Create powerful MCP prompts that guide AI interactions with templates, arguments, and context injection
Implement MCP resources that provide data and files to AI assistants - URIs, caching, and streaming
Master creating MCP tools with type-safe parameters, automatic schema generation, and best practices
Understand MCP transport mechanisms - stdio, SSE, HTTP streaming, and custom transports
Guides users on creating mock implementations for testing with traits, providing test doubles, and avoiding tight coupling to test infrastructure. Activates when users need to test code with external dependencies.
Ensures proper cloud storage operations with retry logic, error handling, streaming, and efficient I/O patterns. Activates when users work with object_store for S3, Azure, or GCS operations.
Proactively analyzes Parquet file operations and suggests optimization improvements for compression, encoding, row group sizing, and statistics. Activates when users are reading or writing Parquet files or discussing Parquet performance.
Helps design port traits and adapter implementations for external dependencies. Activates when users need to abstract away databases, APIs, or other external systems.
Introduces property-based testing with proptest, helping users find edge cases automatically by testing invariants and properties. Activates when users test algorithms or data structures.
Quick start guide for creating MCP servers with the rmcp crate - installation, concepts, and first server
Guides users through migrating to Rust 2024 edition features including let chains, async closures, and improved match ergonomics. Activates when users work with Rust 2024 features or nested control flow.
Reviews test coverage and suggests missing test cases for error paths, edge cases, and business logic. Activates when users write tests or implement new features.
Provides guidance on creating custom error types with thiserror, including proper derive macros, error messages, and source error chaining. Activates when users define error enums or work with thiserror.
Type-driven design patterns in Rust - typestate, newtype, builder pattern, and compile-time guarantees
Use PROACTIVELY this agent when you need to design and create optimal Claude Code subagents, update existing agents with new capabilities, revise agent configurations, analyze project requirements to identify specialized roles, or craft precise agent configurations with appropriate tool permissions and model tiers. When the user specify "Create or Update subagent [name]", this skill must be triggered.
Generate agile release plans with sprints and roadmaps using unique sprint codes. Use when creating sprint schedules, product roadmaps, release planning, or when user mentions agile planning, sprints, roadmap, or release plans.
Facilitates creative ideation sessions for mobile and web app features, generating structured ideas with user stories, technical considerations, and implementation suggestions. Use when planning new features, exploring product direction, generating app ideas, feature discovery, product brainstorming, or when user mentions 'brainstorm', 'ideate', 'app ideas', or 'feature suggestions'.
Educational code development skill that teaches programming concepts while building applications. Use when the user wants to learn how code works, understand programming concepts, or build an app with detailed explanations. Provides line-by-line breakdowns, explains the 'why' behind code patterns, uses pedagogical teaching methods, and builds apps incrementally with educational commentary at each step.
Use this skill when you need to code with tailwind css
Use PROACTIVELY this skill when you need to create or update custom commands following best practices
Use this skill when you need to design a component
Extracts, transforms, and analyzes NBA statistics using the nba_api Python library. Use when working with NBA player stats, team data, game logs, shot charts, league statistics, or any NBA-related data engineering tasks. Supports both stats.nba.com endpoints and static player/team lookups.
Execute systematic feature development using EPIC methodology (Explore, Research, Plan, Validate, Implement, Review, Iterate). Use when building features, implementing complex tasks, or following structured development workflows. Delegates exploration, research, planning, validation, and review to specialized agents.
Creates custom output styles for Claude Code that modify system prompts and behavior. Use when the user asks to create output styles, customize Claude's response format, generate output-style files, or mentions output style configuration.
Use PROACTIVELY when you need to create, update, configure, or validate Claude hooks for various events and integrations
Use PROACTIVELY when you need to create, update, configure, or validate Claude hooks for various events and integrations
Automatically trigger review agents after task completion. Use when strategic-planner finishes planning tasks (calls plan-consultant) or when main agent completes coding tasks in /implement workflow (calls code-reviewer). Triggers on phrases like "plan complete", "implementation done", "coding finished", "ready for review".
Creates and updates modular project rules for Claude Code in .claude/rules/ directory. Use when creating, updating, or modifying rule files, organizing project guidelines, setting up code standards, or when user mentions "create rules", "update rules", "add rules", or "rule configuration".
Use this skill when you need to report on a troubleshooting session
Use this skill when you need to report on a sprint
Setup instructions for this project
Creates and maintains Agent Skills with effective triggers and progressive disclosure. Use when user requests to create a skill, generate a SKILL.md, build custom capabilities, or mentions "create skill", "new skill", or "skill configuration".
Use PROACTIVELY this skill when you need to create comprehensive PRDs, tech specs, and ux specs based on feature description. If the user specify "Create PRD", "Create Tech Specs", or "Create UX Specs", this skill must be triggered.
Generate structured task roadmaps from project specifications. Use when the user asks to create tasks, sprint plans, roadmaps, or work breakdowns based on PRD (Product Requirements Document), Tech Specs, or UI/UX specs. Triggers include requests like "generate tasks from PRD", "create sprint plan", "break down this spec into tasks", "create a roadmap", or "plan the implementation".
Test-Driven Development (TDD) using Vitest and TypeScript. Use when the user requests help with TDD, writing tests before code, test-first development, Vitest test setup, TypeScript testing patterns, unit testing, integration testing, or following the Red-Green-Refactor cycle with Vitest.
Create interactive single-file HTML prototypes for UX validation. Use when the user asks to create a prototype, mockup, or interactive wireframe based on specs/architecture/ux.md or any UX specification. Triggers include requests like "create a prototype", "build a prototype from the UX spec", "make an interactive mockup", "prototype the user flow", or "validate the UX".
Use this skill when you need to write configuration files in `src/config` for the Next.js app
Use this skill when you need to structure data in `srs/data` for the Next.js app
Use this skill when you need to write lib functions in `srs/lib` for the Next.js app
Use this skill when you need to write code for a page layout in the Next.js
Use this skill when you need to write types and interfaces in `srs/types` for the Next.js app
Use this skill when you need to write utility functions for the Next.js app
Roll dice with configurable sides and count - a simple Rust example tool
LLM guide for creating, publishing, and running Enact tools
Scrape, crawl, search, and extract structured data from websites using Firecrawl API - converts web pages to LLM-ready markdown
Formats and prettifies JSON with configurable indentation
A greeting tool written entirely in Brainfuck - the esoteric programming language
A simple Go greeting tool
A simple JavaScript greeting tool
A simple Python greeting tool
A simple Ruby greeting tool
A simple Rust greeting tool
A bare-bones example that prints a greeting
Formats and prettifies JSON with configurable indentation
Browser automation tool using Playwright - captures screenshots and extracts content from web pages
Analyzes text and provides word count, character count, and sentence statistics
AI-powered code review tool that analyzes code for bugs, style issues, and improvements
Tests error visibility for build step failures
A tool that echoes its input for testing
A test tool that fails with visible output
Claude Skills — questions
Answers built from the skills we actually parsed.