Use when building mobile applications with Expo and React Native that require native module integration, navigation setup, performant animations, push notifications, OTA updates, or App Store/Play Store deployment.
Fact verification and source validation specialist. Use PROACTIVELY for claim verification, source credibility assessment, misinformation detection, citation validation, and information accuracy analysis.
Use when building modern async Python APIs with FastAPI, implementing Pydantic v2 validation, dependency injection patterns, or deploying high-performance ASGI applications.
Expert FastAPI spécialisé dans les APIs modernes hautes performances. DOIT ÊTRE UTILISÉ pour le développement d'APIs FastAPI, l'architecture microservices, et l'intégration avec des bases de données asynchrones. Maîtrise FastAPI 0.115+, Pydantic V2, et les patterns API modernes.
Fiddler AI Observability platform monitors LLM applications for hallucinations, toxicity, bias, and drift, with explainability and alerting for production AI.
Use when building payment systems, financial integrations, or compliance-heavy financial applications that require secure transaction processing, regulatory adherence, and high transaction accuracy.
Expert firmware analyst specializing in embedded systems, IoT security, and hardware reverse engineering. Masters firmware extraction, analysis, and vulnerability research for routers, IoT devices, automotive systems, and industrial controllers. Use PROACTIVELY for firmware security audits, IoT penetration testing, or embedded systems research.
Use when the user wants to challenge assumptions, break down a complex problem from scratch, or approach something with first principles reasoning. Triggers on: 'first principles', 'challenge assumptions', 'why do we do it this way', 'rethink', 'from scratch', 'fundamental truths'.
Use when building cross-platform mobile applications with Flutter 3+ that require custom UI implementation, complex state management, native platform integrations, or performance optimization across iOS/Android/Web.
Flutter and Dart code reviewer. Reviews Flutter code for widget best practices, state management patterns, Dart idioms, performance pitfalls, accessibility, and clean architecture violations. Library-agnostic — works with any state management solution and tooling.
Block git force push commands using the if condition for efficient filtering. Prevents accidental force pushes that can overwrite remote history. Covers --force, --force-with-lease, and the -f shorthand.
Automatically format JavaScript/TypeScript files after any Edit operation using prettier. This hook runs 'npx prettier --write' on any .js, .ts, .jsx, or .tsx file that Claude modifies, ensuring consistent code formatting. Uses npx so prettier doesn't need to be globally installed. Includes error suppression so it won't fail if prettier is not available.
Automatically format Python files after any Edit operation using black formatter. This hook runs 'black' on any .py file that Claude modifies, ensuring consistent Python code formatting. Requires black to be installed ('pip install black'). The command includes error suppression (2>/dev/null || true) so it won't fail if black is not installed.
Master software architect specializing in modern architecture patterns, clean architecture, microservices, event-driven systems, and DDD. Reviews system designs and code changes for architectural integrity, scalability, and maintainability. Use PROACTIVELY for architectural decisions.
Refactor legacy codebases, migrate outdated frameworks, and implement gradual modernization. Handles technical debt, dependency updates, and backward compatibility. Use PROACTIVELY for legacy system updates, framework migrations, or technical debt reduction.
Use when building complete frontend applications across React, Vue, and Angular frameworks requiring multi-framework expertise and full-stack integration.