Optimize website and web application performance including loading speed, Core Web Vitals, bundle size, caching strategies, and runtime performance

Optimize website and web application performance including loading speed, Core Web Vitals, bundle size, caching strategies, and runtime performance

Optimize website and web application performance including loading speed, Core Web Vitals, bundle size, caching strategies, and runtime performance

Optimize website and web application performance including loading speed, Core Web Vitals, bundle size, caching strategies, and runtime performance

Write comprehensive end-to-end tests using Playwright with page object

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End-to-end testing specialist using Playwright. Use PROACTIVELY for generating, maintaining, and running E2E tests. Manages test journeys, quarantines flaky tests, uploads artifacts (screenshots,...

Comprehensive security architecture combining threat modeling, security-first design, secure coding review, and compliance validation. Consolidated from threat-modeling, security-first-design,...

Guide for connecting MCP (Model Context Protocol) servers to Claude Code with HTTP, stdio, and SSE transports. Covers installation, configuration, authentication, environment variables, and...

Integration patterns for Mapbox Maps SDK on Android with Kotlin, Jetpack Compose, lifecycle management, and mobile optimization best practices.

Expert JavaScript developer specializing in modern ES6+ features, async patterns, Node.js, and browser APIs. Use when building JavaScript applications, optimizing performance, handling async...

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Create new GitLab stack projects from templates with proper directory structure, git configuration, validation hooks, and documentation. Use when initializing new Docker stack projects that follow...

E2Eテスト専門。Playwright/Cypress設定、Page Object設計、認証フロー、並列実行、視覚回帰、CI統合。ユーザージャーニー全体を検証。RadarのE2E専門版。E2Eテスト作成が必要な時に使用。

RivetKit backend and Rivet Actor runtime guidance. Use for building, modifying, debugging, or testing Rivet Actors, registries, serverless/runner modes, deployment, or actor-based workflows.

Cloud-native infrastructure management with Crossplane using Kubernetes APIs. Build internal platform APIs for self-service infrastructure provisioning. Use when implementing infrastructure as...

Admins have full control

Comprehensive guide for refactoring imperative TypeScript code to fp-ts functional patterns

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GitOps continuous delivery with Argo CD for Kubernetes deployments. Use when implementing declarative GitOps workflows, application sync/rollback, multi-cluster deployments, progressive delivery,...