writing-plans
Use when you have a spec or requirements for a multi-step task, before touching code
tool-design
Use when designing agent tools, creating tool descriptions, implementing MCP tools, or asking about "tool design", "agent tools", "tool descriptions", "MCP", "function calling", "tool consolidation"
huggingface-tokenizers
Use when "tokenizers", "HuggingFace tokenizer", "BPE", "WordPiece", or asking about "train tokenizer", "custom vocabulary", "tokenization", "subword", "fast tokenizer", "encode text"
geopandas
Use when "GeoPandas", "geospatial", "GIS", "shapefile", "GeoJSON", or asking about "spatial analysis", "coordinate transformation", "spatial join", "choropleth map", "buffer analysis", "geographic data", "map visualization"
experiment-tracking
Use when "experiment tracking", "MLflow", "Weights & Biases", "wandb", "model registry", "hyperparameter logging", "ML experiments", "training metrics"
data-science
Use when "statistical modeling", "A/B testing", "experiment design", "causal inference", "predictive modeling", or asking about "hypothesis testing", "feature engineering", "data analysis", "pandas", "scikit-learn"
dispatching-parallel-agents
Use when facing 2+ independent tasks that can be worked on without shared state or sequential dependencies
dspy-prompting
Use when "DSPy", "declarative prompting", "automatic prompt optimization", "Stanford NLP", or asking about "optimizing prompts", "prompt compilation", "modular LLM programming", "chain of thought", "few-shot learning"
executing-plans
Use when you have a written implementation plan to execute in a separate session with review checkpoints
langchain-agents
Use when "LangChain", "LLM chains", "ReAct agents", "tool calling", or asking about "RAG pipelines", "conversation memory", "document QA", "agent tools", "LangSmith"
mcp-development
Use when building "MCP server", "Model Context Protocol", creating "Claude tools", "MCP tools", or asking about "FastMCP", "MCP SDK", "tool development for LLMs", "external API integration for Claude"
memory-systems
Use when implementing agent memory, persisting state across sessions, building knowledge graphs, tracking entities, or asking about "agent memory", "knowledge graph", "entity memory", "vector stores", "temporal knowledge", "cross-session persistence"
data-engineering
Use when "data pipelines", "ETL", "data warehousing", "data lakes", or asking about "Airflow", "Spark", "dbt", "Snowflake", "BigQuery", "data modeling"
dask
Use when "Dask", "parallel computing", "distributed computing", "larger than memory", or asking about "parallel pandas", "parallel numpy", "out-of-core", "multi-file processing", "cluster computing", "lazy evaluation dataframe"
multi-agent-patterns
Use when designing multi-agent systems, implementing supervisor patterns, coordinating multiple agents, or asking about "multi-agent", "supervisor pattern", "swarm", "agent handoffs", "orchestration", "parallel agents"
brand-guidelines
Applies Anthropic's official brand colors and typography to any sort of artifact that may benefit from having Anthropic's look-and-feel. Use it when brand colors or style guidelines, visual formatting, or company design standards apply.
subagent-driven-development
Use when executing implementation plans with independent tasks in the current session
nanobanana
Use when "nanobanana", "generate image", "create image", "edit image", "AI drawing", "Gemini image", "image generation"
competitive-ads-extractor
Extracts and analyzes competitors' ads from ad libraries (Facebook, LinkedIn, etc.) to understand what messaging, problems, and creative approaches are working. Helps inspire and improve your own ad campaigns.
competitive-landscape
This skill should be used when the user asks to "analyze competitors", "assess competitive landscape", "identify differentiation", "evaluate market positioning", "apply Porter's Five Forces", or requests competitive strategy analysis.
plugin-development
Use when creating Claude Code plugins, writing skills, building commands, developing agents, or asking about "plugin development", "create skill", "write command", "build agent", "SKILL.md", "plugin structure", "progressive disclosure"
writing-skills
Use when creating new skills, editing existing skills, or verifying skills work before deployment
codex
Use when "codex", "use gpt", "gpt-5", "openai codex", "let openai", "full-auto", "autonomous code generation"
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
e2e-testing
Use when implementing end-to-end tests, using Playwright or Cypress, testing user journeys, debugging flaky tests, or asking about "E2E testing", "Playwright", "Cypress", "browser testing", "visual regression", "test automation"
test-driven-development
Use when implementing any feature or bugfix, before writing implementation code
Test Coverage
This skill should be used when the user asks to "analyze test coverage", "find untested code", "check coverage gaps", "improve test coverage", "identify missing tests", "measure code coverage", "test quality analysis", or mentions testing strategies and coverage metrics.
systematic-debugging
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes
requirements-engineering
Use when "requirements document", "acceptance criteria", "user stories", "EARS format", "specification", "feature spec", "product requirements"
Refactoring
This skill should be used when the user asks to "refactor code", "rename function", "extract method", "reduce complexity", "migrate code", "code migration", "modernize code", "split class", "move code", or mentions code restructuring and refactoring operations.
receiving-code-review
Use when receiving code review feedback, processing PR comments, or needing to evaluate suggestions before implementing - requires technical verification not blind agreement
Python Patterns
This skill should be used when the user asks about "Python best practices", "Pythonic code", "Python patterns", "Python idioms", "type hints", "dataclasses", "async Python", "Python decorators", "context managers"
Pytest
This skill should be used when the user asks about "pytest", "writing tests", "test fixtures", "parametrize", "mocking", "test coverage", "conftest"
FastAPI
This skill should be used when the user asks about "FastAPI", "FastAPI routes", "FastAPI dependencies", "Pydantic models", "FastAPI middleware", "API endpoints", "OpenAPI", or mentions FastAPI development.
FastAPI Testing
This skill should be used when the user asks about "testing FastAPI", "FastAPI tests", "API testing", "test FastAPI endpoints", "mock FastAPI dependencies", "TestClient", "async API tests"
React
This skill should be used when the user asks about "React", "React components", "React hooks", "useState", "useEffect", "JSX", "React patterns", "React best practices", or mentions React development.
code-review
Use when requesting code review, receiving code review feedback, before merging, or when handling reviewer suggestions - covers both giving and receiving review
Code Quality
This skill should be used when the user asks to "check code quality", "analyze code metrics", "find dead code", "check style compliance", "measure complexity", "find unused imports", "check type hints", "run linting", "PEP8 compliance", or mentions code quality analysis.
saga-orchestration
Use when implementing distributed transactions, coordinating multi-service workflows, handling compensating transactions, or asking about "saga pattern", "distributed transactions", "compensating actions", "workflow orchestration", "choreography vs orchestration"
microservices-patterns
Use when designing microservices architectures, decomposing monoliths, implementing service boundaries, inter-service communication, or asking about "microservices", "service decomposition", "API gateway", "circuit breaker", "distributed systems"
agent-evaluation
Use when evaluating agent performance, building test frameworks, measuring quality, or asking about "agent evaluation", "LLM-as-judge", "agent testing", "quality metrics", "evaluation rubrics", "agent benchmarks"
cqrs
Use when implementing CQRS pattern, separating read and write models, optimizing query performance, or asking about "CQRS", "Command Query Responsibility Segregation", "read model", "write model", "command bus", "query bus"
Architecture Review
This skill should be used when the user asks to "review architecture", "analyze project structure", "check dependencies", "find circular imports", "analyze code patterns", "understand codebase structure", "map dependencies", "evaluate design patterns", or mentions architectural analysis.
webapp-testing
Use when testing "web application", "Playwright", "browser automation", "UI testing", "frontend testing", "E2E testing", "end-to-end tests", or asking about "test local webapp", "browser screenshots", "DOM inspection"
Security Scanning
This skill should be used when the user asks to "scan for vulnerabilities", "check for security issues", "find secrets in code", "audit dependencies", "detect SQL injection", "find XSS vulnerabilities", "check for OWASP issues", "scan for hardcoded credentials", or mentions security analysis of code.
secrets-management
Use when implementing secrets management, using Vault, AWS Secrets Manager, handling credentials in CI/CD, or asking about "secrets", "Vault", "credentials", "secret rotation", "API keys", "external secrets operator"
k8s-security
Use when securing Kubernetes clusters, implementing network policies, configuring RBAC, pod security standards, or asking about "Kubernetes security", "NetworkPolicy", "PodSecurityPolicy", "RBAC", "pod security standards", "OPA Gatekeeper"
helm-charts
Use when creating Helm charts, packaging Kubernetes applications, managing multi-environment deployments, or asking about "Helm", "Helm chart", "values.yaml", "chart templating", "Helm dependencies"
agent-browser
Use when automating browser interactions via CLI, filling forms, taking screenshots, scraping pages, or asking about "agent-browser", "browser automation", "headless browser", "web scraping", "form filling", "Vercel browser"
UI/UX Design
This skill should be used when the user asks about "UI design", "UX design", "user interface", "user experience", "wireframes", "mockups", "design patterns", "design system", "component design", "layout", or mentions UI/UX decisions.
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