swift-performance-optimization
Use when profiling slow SwiftUI screens, optimizing lists, reducing main-thread work, improving memory/CPU, or using Instruments Time Profiler or Swift Concurrency tools.
swift-test-scaffold
Use when adding Swift tests, creating test targets, scaffolding ViewModel or service tests, or choosing Swift Testing over XCTest.
Comprehensive PDF manipulation toolkit for extracting text and tables, creating new PDFs, merging/splitting documents, and handling forms. When Claude needs to fill in a PDF form or programmatically process, generate, or analyze PDF documents at scale.
docx
Comprehensive document creation, editing, and analysis with support for tracked changes, comments, formatting preservation, and text extraction. When Claude needs to work with professional documents (.docx files) for: (1) Creating new documents, (2) Modifying or editing content, (3) Working with tracked changes, (4) Adding comments, or any other document tasks
pptx
Presentation creation, editing, and analysis. When Claude needs to work with presentations (.pptx files) for: (1) Creating new presentations, (2) Modifying or editing content, (3) Working with layouts, (4) Adding comments or speaker notes, or any other presentation tasks
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
spec
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agent-skill-templates
Comprehensive templates, patterns, and best practices for creating Claude Code subagents and skills. Use when building new agents/skills or need reference examples for proper structure and formatting.
python-testing-standards
Comprehensive Python testing best practices, pytest conventions, test structure patterns (AAA, Given-When-Then), fixture usage, mocking strategies, code coverage standards, and common anti-patterns. Essential reference for code reviews, test writing, and ensuring high-quality Python test suites with pytest, unittest.mock, and pytest-cov.
python-type-hints-guide
Comprehensive reference guide for Python type hints, static type checking with mypy, modern type annotation patterns (PEP 484, 585, 604, 612, 613), and type hint best practices for Python 3.9+. Use during code reviews to ensure proper type annotation usage, evaluate mypy configuration, and identify type hint anti-patterns.
sdlc-repository-templates
Templates, standards, and structure requirements for generating SDLC approach learning repositories. Use when creating new methodology learning repositories, artifact documentation, or validating repository structure.
spring-framework-patterns
Comprehensive Spring Framework and Spring Boot best practices including dependency injection patterns, bean lifecycle and scopes, REST API development, Spring Data JPA, service layer design, Spring Security, testing strategies, caching, AOP, async processing, error handling, and common anti-patterns. Essential reference for code reviews and Spring Boot application development.
django-conventions
Comprehensive Django best practices covering project structure, models (field choices, Meta options, managers, QuerySets, migrations), views (CBVs vs FBVs, generic views), Django REST Framework (serializers, ViewSets, permissions), forms, templates, security (CSRF, XSS, SQL injection), performance (N+1 queries, select_related, prefetch_related, caching), testing, and common anti-patterns. Essential reference for Django code reviews and development.
fastapi-patterns
Comprehensive FastAPI best practices, patterns, and conventions for building production-ready Python web APIs. Covers application structure, async patterns, Pydantic models, dependency injection, database integration, authentication, error handling, testing, OpenAPI documentation, performance optimization, and common anti-patterns. Essential reference for FastAPI code reviews and development.
java-best-practices
Comprehensive Java development best practices covering SOLID principles, DRY, Clean Code, Java-specific patterns (Optional, immutability, streams, lambdas), exception handling, collections, concurrency, testing with JUnit 5 and Mockito, code organization, performance optimization, and common anti-patterns. Essential reference for uncle-duke-java agent during code reviews and architecture guidance.
python-async-patterns
Comprehensive guide to Python async/await patterns, best practices, and anti-patterns. Covers asyncio fundamentals, coroutines, async context managers, task management, common libraries (aiohttp, aiofiles, asyncpg), framework integration (FastAPI, Django), performance considerations, and proper exception handling. Use when reviewing or writing asynchronous Python code.
commit
Use when asked to create a git commit, split changes into commits, or write a commit message. Prefer small commits that are easy to review. Follow this repo's commit message pattern when clear from recent history or touched-path history; otherwise default to conventional commits. Never commit gitignored, ephemeral, generated, local-only, or secret files.
grill-me
Interview the user relentlessly about a plan or design until reaching shared understanding, resolving each branch of the decision tree. Use when user wants to stress-test a plan, get grilled on their design, or mentions "grill me".
impress-me
Use when the user wants a topic, idea, question, or direction researched deeply and expects an unusually strong, well-structured answer.
librarian
Use for code research that needs dependency internals, upstream implementation examples, or external prior art. Always delegate to a subagent that investigates with opensrc and web search, then return only distilled findings, versions, paths, and links.
ui-expert
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capture-skill
Capture learnings, patterns, or workflows from the current conversation into a new or existing skill. Use when the user wants to save what was learned, discovered, or built during a conversation as a reusable skill for future sessions. Triggers include "capture this as a skill", "save this for next time", "turn this into a skill", or when a useful workflow, pattern, or piece of domain knowledge emerged during the conversation.
fakturoid
Czech invoicing API integration for Fakturoid. Use when the user needs to create, manage, or retrieve invoices, contacts/subjects, or expenses from Fakturoid. Supports OAuth 2.0 authentication, invoice creation with Czech tax compliance (IČO, DIČ, VAT), PDF downloads, payment tracking, expense management, inventory, recurring invoices, webhooks, and invoice templates (generators). Triggers on mentions of Fakturoid, Czech invoicing, IČO/DIČ, or invoice management tasks.
frontend-design
Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, or applications. Generates creative, polished code that avoids generic AI aesthetics.
agent-browser
Automates browser interactions for web testing, form filling, screenshots, and data extraction. Use when the user needs to navigate websites, interact with web pages, fill forms, take screenshots, test web applications, or extract information from web pages.
bugs-to-stories
Convert bug reports into prd.json user stories for autonomous fixing. Use after running test-and-break skill. Triggers on: convert bugs to stories, fix these bugs, add bugs to prd, create fix stories.
secrets-gitleaks
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test-and-break
Autonomous testing skill that opens a deployed app, goes through user flows, tries to break things, and writes detailed bug reports. Use after deploying to staging. Triggers on: test the app, find bugs, QA the deployment, break the app, test staging.
compound-engineering
Compound Engineering workflow for AI-assisted development. Use when planning features, executing work, reviewing code, or codifying learnings. Follows the Plan → Work → Review → Compound loop where each unit of engineering makes subsequent work easier. Triggers on: plan this feature, implement this, review this code, compound learnings, create implementation plan, systematic development.
edge-cases
Analyze a PRD for edge cases, failure modes, and scenarios that might be missed. Use after creating a PRD to strengthen it. Triggers on: analyze edge cases, find edge cases, what could go wrong, edge case analysis.
pytm
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sast-semgrep
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sca-trivy
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story-quality
Review user stories for quality, proper sizing, sequencing, and acceptance criteria. Use before converting to prd.json. Triggers on: review stories, check user stories, story quality, validate stories.
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".
Comprehensive PDF manipulation toolkit for extracting text and tables, creating new PDFs, merging/splitting documents, and handling forms. When Claude needs to fill in a PDF form or programmatically process, generate, or analyze PDF documents at scale.
prd
Generate a Product Requirements Document (PRD) for a new feature. Use when planning a feature, starting a new project, or when asked to create a PRD. Triggers on: create a prd, write prd for, plan this feature, requirements for, spec out.
docx
Comprehensive document creation, editing, and analysis with support for tracked changes, comments, formatting preservation, and text extraction. When Claude needs to work with professional documents (.docx files) for: (1) Creating new documents, (2) Modifying or editing content, (3) Working with tracked changes, (4) Adding comments, or any other document tasks
ralph
Convert PRDs to prd.json format for the Ralph autonomous agent system. Use when you have an existing PRD and need to convert it to Ralph's JSON format. Triggers on: convert this prd, turn this into ralph format, create prd.json from this, ralph json.
vercel-react-best-practices
React and Next.js performance optimization guidelines from Vercel Engineering. This skill should be used when writing, reviewing, or refactoring React/Next.js code to ensure optimal performance patterns. Triggers on tasks involving React components, Next.js pages, data fetching, bundle optimization, or performance improvements.
project-status-report
Create and update structured project status reports from meetings, messages, documents, or notes. Use when users need to extract status updates into markdown reports with summary, problems, risks, and actions sections, consolidate multiple team reports, update existing reports maintaining reverse chronological order, save/modify reports in Obsidian vault, or mention terms like "status report", "project update", "sync", "war room", "team report", or "weekly update".
arkit-visionos-developer
Router for ARKit features on visionOS 27, including ARKitSession setup, authorization, provider selection, anchor processing, and RealityKit integration. Use when choosing an ARKit provider set, combining multiple ARKit providers, or troubleshooting shared ARKit lifecycle behavior before routing to focused provider skills.
coding-standards-enforcer
Enforce repository coding standards for Swift 6.2 strict concurrency, actor isolation, @Observable models, SWIFT_APPROACHABLE_CONCURRENCY, @concurrent functions, and modern Swift APIs across visionOS app code. Use when reviewing, writing, or migrating Swift code in this plugin's scope.
realitykit-visionos-developer
Route RealityKit work on visionOS 27 and handle core entity/component basics, RealityView scene setup, asset loading, input targets, SwiftUI attachments, anchoring, portals, synchronization, and USDStage bridge usage. Use for general RealityKit triage, choosing documented components, loading Reality Composer Pro, USD, USDZ, or .reality content, and deciding whether to hand off to realitykit-rendering-materials, realitykit-animation-physics, realitykit-audio-spatial, realitykit-ecs-systems, spatial-preview-developer, usdkit-runtime-developer, usd-editor, shadergraph-editor, ARKit, SwiftUI, or build-debug skills.
shadergraph-editor
Author, load, and troubleshoot Reality Composer Pro Shader Graph materials for RealityKit on visionOS. Use when building Shader Graph materials, exposing promoted inputs for runtime control, debugging exported USD and MaterialX interop, or building shader graphs programmatically in Swift on visionOS 27.
arkit-camera-access-providers
Build and debug ARKit camera access providers for visionOS 27: CameraFrameProvider and CameraRegionProvider. Use when accessing camera frame streams, region-scoped camera content, custom computer-vision pipelines, or troubleshooting camera-access authorization, entitlement, enterprise, format, and support issues.
arkit-hand-tracking-provider
Build and debug HandTrackingProvider on visionOS 27. Use when implementing hand anchors, hand joint transforms, custom hand gestures, hand-driven interactions, hand visualizations, or troubleshooting hand-tracking authorization, support, and lifecycle behavior.
arkit-reference-tracking-providers
Build and debug ARKit reference and marker tracking providers for visionOS 27: ImageTrackingProvider, ObjectTrackingProvider, BarcodeDetectionProvider, and AccessoryTrackingProvider. Use when anchoring to known images, tracked 3D reference objects, barcodes, or supported accessories.
arkit-rendering-context-providers
Build and debug ARKit rendering-context providers for visionOS 27: EnvironmentLightEstimationProvider, StereoPropertiesProvider, and VisualFidelityProvider. Use when matching virtual lighting to the environment, informing custom stereo rendering, coaching device fit, or tuning foveated field of view.
arkit-spatial-tracking-providers
Build and debug ARKit spatial tracking providers for visionOS 27: WorldTrackingProvider, PlaneDetectionProvider, SceneReconstructionProvider, RoomTrackingProvider, and SharedCoordinateSpaceProvider. Use when implementing world anchors, device pose queries, surface placement, mesh reconstruction, room context, or shared coordinate spaces.
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