Debugging
Find and fix bugs, error analysis
ios-app-store-diag
by derKlinke
Use when app is rejected by App Review, submission blocked, or appeal needed - systematic diagnosis from rejection message to fix with guideline-specific remediation patterns and appeal writing
debug:express
by SnakeO
Debug Express.js and Node.js applications with systematic diagnostic techniques. This skill provides comprehensive guidance for troubleshooting middleware execution issues, routing problems, CORS errors, async error handling, memory leaks, and unhandled promise rejections. Covers DEBUG environment variable usage, Node Inspector with Chrome DevTools, VS Code debugging, Morgan request logging, and diagnostic middleware patterns. Includes four-phase debugging methodology and common error message reference.
Observability
by andrueandersoncs
This skill should be used when the user asks about "Effect logging", "Effect.log", "Effect metrics", "Effect tracing", "spans", "telemetry", "Metric.counter", "Metric.gauge", "Metric.histogram", "OpenTelemetry", "structured logging", "log levels", "Effect.logDebug", "Effect.logInfo", "Effect.logWarning", "Effect.logError", or needs to understand how Effect handles logging, metrics, and distributed tracing.
effect-ts-errors
by mrevanzak
Use when implementing error handling, validation logic, or custom error types in Effect-TS.
Streams
by andrueandersoncs
This skill should be used when the user asks about "Effect Stream", "Stream.from", "Stream.map", "Stream.filter", "Stream.run", "streaming data", "async iteration", "Sink", "Channel", "Stream.concat", "Stream.merge", "backpressure", "Stream.fromIterable", "chunked processing", "real-time data", or needs to understand how Effect handles streaming data processing.
debug-systematically
by eveld
Use when encountering errors or bugs to follow a systematic debugging process instead of jumping to conclusions.
Configuration
by andrueandersoncs
This skill should be used when the user asks about "Effect Config", "environment variables", "configuration management", "Config.string", "Config.number", "ConfigProvider", "Config.nested", "Config.withDefault", "Config.redacted", "sensitive values", "config validation", "loading config from JSON", "config schema", or needs to understand how Effect handles application configuration.
debug:react-native
by SnakeO
Debug React Native issues systematically. Use when encountering native module errors like "Native module cannot be null", Metro bundler issues including port conflicts and cache corruption, platform-specific build failures for iOS CocoaPods or Android Gradle, bridge communication problems, Hermes engine bytecode compilation failures, red screen fatal errors, or New Architecture migration issues with TurboModules and Fabric renderer.
4d-v21
by Ganbin
Comprehensive 4D v21 development expert with embedded official documentation. Covers ORDA patterns, entity classes, data model classes, queries, classic methods, data types, error handling, forms, events, web server, and REST API. Use when working with 4D files (.4dm), 4D language questions, 4D project structure, entity classes, ORDA queries, database operations, form development, web server configuration, REST API usage, or any 4D-specific syntax issue. Includes full official 4D v21 documentation for on-demand retrieval. Triggers on: .4dm files, 4D code, ORDA, entity selection, dataclass, 4D query, 4D form, 4D web server, 4D REST, 4D command, 4D collection, 4D object.
debug:pandas
by SnakeO
Debug Pandas issues systematically. Use when encountering DataFrame errors, SettingWithCopyWarning, KeyError on column access, merge and join mismatches with unexpected NaN values, memory errors with large DataFrames, dtype conversion issues, index alignment problems, or any data manipulation errors in Python data analysis workflows.
debug:pytorch
by SnakeO
Debug PyTorch issues systematically. Use when encountering tensor errors, CUDA out of memory errors, gradient problems like NaN loss or exploding gradients, shape mismatches between layers, device conflicts between CPU and GPU, autograd graph issues, DataLoader problems, dtype mismatches, or training instabilities in deep learning workflows.
ios-app-discoverability
by derKlinke
Use when making app surface in Spotlight search, Siri suggestions, or system experiences - covers the 6-step strategy combining App Intents, App Shortcuts, Core Spotlight, and NSUserActivity to feed the system metadata for iOS 16+
refactor:express
by SnakeO
Refactor Express.js/Node.js code to improve maintainability, readability, and adherence to best practices. Transforms callback hell, fat route handlers, and outdated patterns into clean, modern JavaScript/TypeScript code. Applies async/await, controller-service-repository architecture, proper middleware patterns, and ESM modules. Identifies and fixes anti-patterns including blocking event loop, improper error handling, forEach with async callbacks, and memory leaks.
debug:swiftui
by SnakeO
Debug SwiftUI application issues systematically. This skill helps diagnose and resolve SwiftUI-specific problems including view update failures, state management issues with @State/@Binding/@ObservedObject, NavigationStack problems, memory leaks from retain cycles, preview crashes, Combine publisher issues, and animation glitches. Provides Xcode debugger techniques, Instruments profiling, and LLDB commands for iOS/macOS development.
effect-ts-fundamentals
by mrevanzak
Use when implementing type-safe, composable, and testable applications using Effect-TS, specifically for service definition, dependency injection, and sequential async logic.
State Management
by andrueandersoncs
This skill should be used when the user asks about "Effect Ref", "mutable state", "Ref.make", "Ref.get", "Ref.set", "Ref.update", "SubscriptionRef", "SynchronizedRef", "reactive state", "state updates", "concurrent state", "shared mutable state", or needs to understand how Effect handles mutable state in a functional way.
ios-app-composition
by derKlinke
Use when structuring app entry points, managing authentication flows, switching root views, handling scene lifecycle, or asking 'how do I structure my @main', 'where does auth state live', 'how do I prevent screen flicker on launch', 'when should I modularize' - app-level composition patterns for iOS 26+
python-expert-best-practices-code-review
by wispbit-ai
Python best practices for writing production-grade code. This skill should be used when writing, reviewing, or refactoring Python code. Triggers on tasks involving Python development, error handling patterns, dictionary operations, and code quality improvements.
langchain
by G1Joshi
LangChain LLM application framework with chains and agents. Use for LLM orchestration.
ios-camera-capture-ref
by derKlinke
Reference — AVCaptureSession, AVCapturePhotoSettings, AVCapturePhotoOutput, RotationCoordinator, photoQualityPrioritization, deferred processing, AVCaptureMovieFileOutput, session presets, capture device APIs
modelslab-webhooks
by ModelsLab
Handle async operations efficiently using ModelsLab webhooks. Get real-time notifications when API requests complete instead of polling.
ios-avfoundation-ref
by derKlinke
Use for AVFoundation audio reference: AVAudioSession categories/modes/options, AVAudioEngine pipelines/taps/conversion, DAC output behavior, and iOS 26+ input/spatial audio features.
debug:kubernetes
by SnakeO
Debug Kubernetes clusters and workloads systematically with this comprehensive troubleshooting skill. Covers CrashLoopBackOff, ImagePullBackOff, OOMKilled, pending pods, service connectivity issues, PVC binding failures, and RBAC permission errors. Provides structured four-phase debugging methodology with kubectl commands, ephemeral debug containers, and essential one-liners for diagnosing pod, service, network, and storage problems across namespaces.
refactor:react
by SnakeO
Refactor React and TypeScript code to improve maintainability, readability, and performance. This skill transforms complex React components into clean, well-structured code following modern React 19 patterns. It addresses component bloat, prop drilling, unnecessary re-renders, and improper hook usage. Leverages React 19 features including the React Compiler for automatic memoization, Actions for form handling, useOptimistic for immediate UI feedback, the use() hook for async data, and Server Components for optimal performance.