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molfeat
Molecular featurization for ML (100+ featurizers). ECFP, MACCS, descriptors, pretrained models (ChemBERTa), convert SMILES to features, for QSAR and molecular ML.
testing-strategies
Provides language-agnostic testing patterns covering the testing pyramid, AAA structure, naming conventions, mocking strategies, test data management, and CI/CD integration. Offers concrete examples for unit, integration, and E2E testing with practical guidance on test performance and maintenance.
geopandas
This skill provides comprehensive guidance for using GeoPandas to work with geospatial vector data. It covers installation, core concepts, data I/O, CRS management, geometric operations, spatial analysis, and visualization with practical code examples. The documentation includes workflows for common tasks like spatial joins, buffer analysis, and creating choropleth maps.
ccs-delegation
Automates delegation of deterministic coding tasks (typos, tests, refactoring) to cost-optimized AI models via CCS CLI. Parses user intent, selects optimal profile based on task analysis, enhances prompts with context, and reports execution results. Includes session continuation and detailed error handling.
openai-api
Build with OpenAI stateless APIs - Chat Completions (GPT-5.2, o3), Realtime voice, Batch API (50% savings), Embeddings, DALL-E 3, Whisper, and TTS. Prevents 16 documented errors. Use when: implementing GPT-5 chat, streaming, function calling, embeddings for RAG, or troubleshooting rate limits (429), API errors, TypeScript issues, model name errors.
transformers
Provides comprehensive guidance for using Hugging Face Transformers library across NLP, vision, and audio tasks. Covers installation, authentication, pipelines for quick inference, model loading, text generation, fine-tuning, and tokenization with practical code examples.
G2 Legend Expert
Provides detailed knowledge of G2 chart library's legend rendering system, including component inference, layout calculation, and interaction handling. Explains why manual padding changes legend height and offers concrete solutions. Useful for developers customizing or debugging G2 legends.
claude-md-enhancer
Analyzes, generates, and enhances CLAUDE.md files for any project type using best practices, modular architecture support, and tech stack customization. Use when setting up new projects, improving existing CLAUDE.md files, or establishing AI-assisted development standards.
stock-analyzer
Provides comprehensive technical analysis for stocks and ETFs using RSI, MACD, Bollinger Bands, and other indicators. Activates when user requests stock analysis, technical indicators, trading signals, or market data for specific ticker symbols.
github-project-management
An ambitious GitHub project management skill that integrates swarm coordination for automated issue tracking and project board management, offering advanced automation but with complex dependencies.
polars
This skill provides comprehensive guidance for using Polars, a high-performance DataFrame library. It covers core concepts like lazy evaluation, common operations, performance optimization, and file handling. The documentation includes practical code examples, best practices for different scenarios, and debugging techniques for data workflows.
System
A system maintenance skill for Claude's Personal AI Infrastructure that handles integrity checks, session documentation, git operations, and security scans. It provides four core workflows with clear triggers and composition rules, plus security workflows for secret detection and privacy validation.
codeql
Run CodeQL static analysis for security vulnerability detection, taint tracking, and data flow analysis. Use when asked to analyze code with CodeQL, create CodeQL databases, write custom QL queries, perform security audits, or set up CodeQL in CI/CD pipelines.
analytics-tracking
When the user wants to set up, improve, or audit analytics tracking and measurement. Also use when the user mentions "set up tracking," "GA4," "Google Analytics," "conversion tracking," "event tracking," "UTM parameters," "tag manager," "GTM," "analytics implementation," or "tracking plan." For A/B test measurement, see ab-test-setup.
gemini-imagegen
This skill provides direct access to Google's Gemini Pro image generation API from within Claude. It handles text-to-image creation, image editing, style transfers, and multi-turn refinement. The documentation is thorough, covering common pitfalls like JPEG format handling and offering practical examples for different use cases like logos and product mockups.
database-migration
Execute database migrations across ORMs and platforms with zero-downtime strategies, data transformation, and rollback procedures. Use when migrating databases, changing schemas, performing data transformations, or implementing zero-downtime deployment strategies.
ai-agents
Provides concrete templates and decision trees for building AI agents with MCP tool integration. Covers workflow, tool-using, RAG, planner, multi-agent, OS, and code agent patterns. Includes explicit handoff orchestration, guardrails, and observability guidance. Focuses on executable procedures over theory.
shopify-api
Complete API integration guide for Shopify including GraphQL Admin API, REST Admin API, Storefront API, Ajax API, OAuth authentication, rate limiting, and webhooks. Use when making API calls to Shopify, authenticating apps, fetching product/order/customer data programmatically, implementing cart operations, handling webhooks, or working with API version 2025-10. Requires fetch or axios for JavaScript implementations.
generate-image
A Python CLI tool that generates and edits images using OpenRouter's API with models like FLUX.2 Pro and Gemini 3 Pro. It handles both creation and modification tasks with clear model selection guidance and API key management.
songsee
This skill wraps the songsee CLI tool to generate spectrograms and multi-panel audio visualizations from audio files. It supports various visualization types, time slicing, and output formats. The tool handles WAV/MP3 natively and uses ffmpeg for other formats when available.
subagent-driven-development
A sophisticated skill for orchestrating AI subagents to execute development plans with quality gates, enabling parallel or sequential task execution with systematic code review between stages.
networkx
This skill provides access to the NetworkX Python library for creating, analyzing, and visualizing network graphs. It includes examples for building graphs, running algorithms like shortest paths and centrality measures, generating synthetic networks, and creating visualizations with matplotlib and interactive libraries.
pathml
Full-featured computational pathology toolkit. Use for advanced WSI analysis including multiplexed immunofluorescence (CODEX, Vectra), nucleus segmentation, tissue graph construction, and ML model training on pathology data. Supports 160+ slide formats. For simple tile extraction from H&E slides, histolab may be simpler.
building-nextjs-apps
This skill provides concrete guidance for building Next.js 16 applications, focusing on breaking changes like async params/searchParams and proxy.ts. It offers specific code patterns for layouts, dynamic routes, server actions, and data fetching. Includes practical solutions for datetime handling and project structure.