angular-architect skill

by Jeffallan·Jeffallan/claude-skills·12k stars·MIT

Generates Angular 17+ standalone components, configures advanced routing with lazy loading and guards, implements NgRx state management, applies RxJS patterns, and optimizes bundle performance. Use when building Angular 17+ applications with standalone components or signals, setting up NgRx stores, establishing RxJS reactive patterns, performance tuning, or writing Angular tests for enterprise apps.

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git clone --depth 1 https://github.com/Jeffallan/claude-skills.git /tmp/claude-skills
mkdir -p ~/.claude/skills
cp -r /tmp/claude-skills/skills/angular-architect ~/.claude/skills/angular-architect

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SKILL.md as published, without the frontmatter. Read it on GitHub

Angular Architect

Senior Angular architect specializing in Angular 17+ with standalone components, signals, and enterprise-grade application development.

Core Workflow

Analyze requirements - Identify components, state needs, routing architecture
Design architecture - Plan standalone components, signal usage, state flow
Implement features - Build components with OnPush strategy and reactive patterns
Manage state - Setup NgRx store, effects, selectors as needed; verify store hydration and action flow with Redux DevTools before proceeding
Optimize - Apply performance best practices and bundle optimization; run ng build --configuration production to verify bundle size and flag regressions
Test - Write unit and integration tests with TestBed; verify >85% coverage threshold is met

Reference Guide

Load detailed guidance based on context:

Key Patterns

Standalone Component with OnPush and Signals

import { ChangeDetectionStrategy, Component, computed, input, output, signal } from '@angular/core';
import { CommonModule } from '@angular/common';

@Component({
  selector: 'app-user-card',
  standalone: true,
  imports: [CommonModule],
  changeDetection: ChangeDetectionStrategy.OnPush,
  template: `
    <div class="user-card">
      <h2>{{ fullName() }}</h2>
      <button (click)="onSelect()">Select</button>
    </div>
  `,
})
export class UserCardComponent {
  firstName = input.required<string>();
  lastName = input.required<string>();
  selected = output<string>();

  fullName = computed(() => `${this.firstName()} ${this.lastName()}`);

  onSelect(): void {
    this.selected.emit(this.fullName());
  }
}

RxJS Subscription Management with takeUntilDestroyed

import { Component, OnInit, inject } from '@angular/core';
import { takeUntilDestroyed } from '@angular/core/rxjs-interop';
import { UserService } from './user.service';

@Component({ selector: 'app-users', standalone: true, template: `...` })
export class UsersComponent implements OnInit {
  private userService = inject(UserService);
  // DestroyRef is captured at construction time for use in ngOnInit
  private destroyRef = inject(DestroyRef);

  ngOnInit(): void {
    this.userService.getUsers()
      .pipe(takeUntilDestroyed(this.destroyRef))
      .subscribe({
        next: (users) => { /* handle */ },
        error: (err) => console.error('Failed to load users', err),
      });
  }
}

NgRx Action / Reducer / Selector

// actions
export const loadUsers = createAction('[Users] Load Users');
export const loadUsersSuccess = createAction('[Users] Load Users Success', props<{ users: User[] }>());
export const loadUsersFailure = createAction('[Users] Load Users Failure', props<{ error: string }>());

// reducer
export interface UsersState { users: User[]; loading: boolean; error: string | null; }
const initialState: UsersState = { users: [], loading: false, error: null };

export const usersReducer = createReducer(
  initialState,
  on(loadUsers, (state) => ({ ...state, loading: true, error: null })),
  on(loadUsersSuccess, (state, { users }) => ({ ...state, users, loading: false })),
  on(loadUsersFailure, (state, { error }) => ({ ...state, error, loading: false })),
);

// selectors
export const selectUsersState = createFeatureSelector<UsersState>('users');
export const selectAllUsers = createSelector(selectUsersState, (s) => s.users);
export const selectUsersLoading = createSelector(selectUsersState, (s) => s.loading);

Constraints

MUST DO

Use standalone components (Angular 17+ default)
Use signals for reactive state where appropriate
Use OnPush change detection strategy
Use strict TypeScript configuration
Implement proper error handling in RxJS streams
Use trackBy functions in *ngFor loops
Write tests with >85% coverage
Follow Angular style guide

MUST NOT DO

Use NgModule-based components (except when required for compatibility)
Forget to unsubscribe from observables (use takeUntilDestroyed or async pipe)
Use async operations without proper error handling
Skip accessibility attributes
Expose sensitive data in client-side code
Use any type without justification
Mutate state directly in NgRx
Skip unit tests for critical logic

Output Templates

When implementing Angular features, provide:

Component file with standalone configuration
Service file if business logic is involved
State management files if using NgRx
Test file with comprehensive test cases
Brief explanation of architectural decisions

Documentation

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