Guidelines for proper React useEffect usage and avoiding unnecessary Effects. Use when writing, reviewing, or refactoring React components that use useEffect, useState, or handle side effects....
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cloudflare-workflows
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Cloudflare Workflows durable execution playbook: multi-step orchestration, state persistence, retries, sleep/scheduling, waitForEvent, external events, bindings, lifecycle management, limits,...
web-search
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Search the web for real-time information, news, and current events.
async-expert
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Expert in asynchronous programming patterns across languages (Python asyncio, JavaScript/TypeScript promises, C# async/await, Rust futures). Use for concurrent programming, event loops, async...
ha-api
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Integrate with Home Assistant REST and WebSocket APIs. Use when making API calls, managing entity states, calling services, subscribing to events, or setting up authentication. Activates on...
hook-creator
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Create and configure Claude Code hooks for customizing agent behavior. Use when the user wants to (1) create a new hook, (2) configure automatic formatting, logging, or notifications, (3) add file...
kotlin-coroutines
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Advanced Kotlin coroutines patterns for AmethystMultiplatform. Use when working with: (1) Structured concurrency (supervisorScope, coroutineScope), (2) Advanced Flow operators (flatMapLatest,...
aws-skills
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AWS development with CDK best practices, serverless patterns, cost optimization, and event-driven architecture. Use when deploying to AWS, writing Lambda functions, configuring API Gateway,...
six-thinking-hats
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Apply Edward de Bono's Six Thinking Hats methodology to software testing for comprehensive quality analysis. Use when designing test strategies, conducting test retrospectives, analyzing test...
sentry-skill
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Comprehensive skill for Sentry error monitoring and performance tracking. Use when Claude needs to (1) Configure Sentry SDKs for error tracking and performance monitoring, (2) Manage releases,...
victoria3-mod-dev
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Comprehensive Victoria 3 modding skill for creating, modifying, and debugging mods. Use when working with Victoria 3 mods for (1) Creating new mods from scratch, (2) Adding or modifying game...
neurokit2
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Comprehensive biosignal processing toolkit for analyzing physiological data including ECG, EEG, EDA, RSP, PPG, EMG, and EOG signals. Use this skill when processing cardiovascular signals, brain...
neurokit2
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Comprehensive biosignal processing toolkit for analyzing physiological data including ECG, EEG, EDA, RSP, PPG, EMG, and EOG signals. Use this skill when processing cardiovascular signals, brain...
neurokit2
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Comprehensive biosignal processing toolkit for analyzing physiological data including ECG, EEG, EDA, RSP, PPG, EMG, and EOG signals. Use this skill when processing cardiovascular signals, brain...
Technical architect assistant that helps design robust, scalable, and maintainable backend/frontend architectures. Provides visual diagrams, pattern recommendations, API design guidance, and stack...
send
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Emit a message or event to an external system with policy enforcement and approval gates. Use when publishing messages, calling APIs, sending notifications, or triggering external workflows....
Distributed systems expert specializing in service decomposition, orchestration, and microservices architecture patterns. Use when designing microservices, defining service boundaries,...
roadmap-backcast
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Use when planning with fixed deadline or target outcome, working backward from future goal to present, defining milestones and dependencies, mapping critical path, identifying what must happen...
backend-engineering
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Build production-grade, scalable backends with Rust (Axum) for high-performance services and FastAPI for Python APIs. Includes ML inference serving (ONNX, vLLM, TensorRT), event-driven...
product-analytics
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Measure what matters with proper event tracking, funnels, cohorts, and metrics. Use when setting up analytics, tracking features, or understanding behavior.