advanced-angular-agentic-swe

Consolidated Angular conventions for components, dependency injection, forms, HTTP, routing, signals, MSAL authentication, and A2UI generative UI. Use when working on Angular applications and you need modern Angular guidance or routing into a specific Angular concern. Triggers on component creation, inject(), signal forms, httpResource(), guards, route configuration, computed(), linkedSignal(), MSAL, Azure Entra, A2UI, agent-driven / generative UI, Angular architecture, load-once data loading, ensureLoaded guards, duplicate HTTP requests, refetch-after-CRUD elimination, and production bundle-size optimization (initial budget exceeded, main.js too big, tree-shaking, lazy-init).

Complete installation and configuration guide for ngx-markdown and its plugins in Angular projects. Use when setting up markdown rendering with syntax highlighting, diagrams, and advanced features.

Configure Angular projects for web components (Angular Elements) with dual development and distribution configurations.

Step-by-step guide for implementing Playwright E2E testing in Angular v20+ projects. Covers installation, configuration, test organization with fixtures and page objects, and best practices for modern standalone components with Vitest and Playwright integration.

Add a new demo to any module under demos/. Registers it in db.json, generates the component, adds the route, adds the markdown renderer, and creates an empty guide. Triggers on: add demo, create demo, new demo, register demo.

Step-by-step guide for migrating Angular projects from Karma/Jasmine to Vitest (Angular v20/21+). Includes dependency management, configuration setup, test file API migration, and best practices for zoneless/OnPush testing.

Expert guidance for creating accessible code conforming to WCAG 2.2 Level AA. Use for accessibility compliance, component architecture, keyboard navigation, focus management, contrast verification, and inclusive UI patterns.

Create modern Angular standalone components following v20+ best practices. Use for building UI components with signal-based inputs/outputs, OnPush change detection, host bindings, content projection, and lifecycle hooks. Triggers on component creation, refactoring class-based inputs to signals, adding host bindings, or implementing accessible interactive components.

Create custom directives in Angular v20+ for DOM manipulation and behavior extension. Use for attribute directives that modify element behavior/appearance, structural directives for portals/overlays, and host directives for composition. Triggers on creating reusable DOM behaviors, extending element functionality, or composing behaviors across components. Note - use native @if/@for/@switch for control flow, not custom structural directives.

Implement server-side rendering and hydration in Angular v20+ using @angular/ssr. Use for SSR setup, hydration strategies, prerendering static pages, and handling browser-only APIs. Triggers on SSR configuration, fixing hydration mismatches, prerendering routes, or making code SSR-compatible.

Write unit and integration tests for Angular v20+ applications using Vitest or Jasmine with TestBed and modern testing patterns. Use for testing components with signals, OnPush change detection, services with inject(), and HTTP interactions. Triggers on test creation, testing signal-based components, mocking dependencies, or setting up test infrastructure. Don't use for E2E testing with Cypress or Playwright, or for testing non-Angular JavaScript/TypeScript code.