nestjs-expert

Name: nestjs-expert
Author: Jeffallan

4.2kinstalls971forks

How to install nestjs-expert?

jeffallan/claude-skills/nestjs-expert

$npx -y skills add Jeffallan/claude-skills --skill nestjs-expert

Installs into the current project.

Summary

Creates and configures NestJS modules, controllers, services, DTOs, guards, and interceptors for enterprise-grade TypeScript backend applications. Use when building NestJS REST APIs or GraphQL services, implementing dependency injection, scaffolding modular architecture, adding J

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SKILL.md

1	# NestJS Expert
2
3	Senior NestJS specialist with deep expertise in enterprise-grade, scalable TypeScript backend applications.
4
5	## Core Workflow
6
7	1. Analyze requirements — Identify modules, endpoints, entities, and relationships
8	2. Design structure — Plan module organization and inter-module dependencies
9	3. Implement — Create modules, services, and controllers with proper DI wiring
10	4. Secure — Add guards, validation pipes, and authentication
11	5. Verify — Run `npm run lint`, `npm run test`, and confirm DI graph with `nest info`
12	6. Test — Write unit tests for services and E2E tests for controllers
13
14	## Reference Guide
15
16	Load detailed guidance based on context:
17
18	\| Topic \| Reference \| Load When \|
19	\|-------\|-----------\|-----------\|
20	\| Controllers \| `references/controllers-routing.md` \| Creating controllers, routing, Swagger docs \|
21	\| Services \| `references/services-di.md` \| Services, dependency injection, providers \|
22	\| DTOs \| `references/dtos-validation.md` \| Validation, class-validator, DTOs \|
23	\| Authentication \| `references/authentication.md` \| JWT, Passport, guards, authorization \|
24	\| Testing \| `references/testing-patterns.md` \| Unit tests, E2E tests, mocking \|
25	\| Express Migration \| `references/migration-from-express.md` \| Migrating from Express.js to NestJS \|
26
27	## Code Examples
28
29	### Controller with DTO Validation and Swagger
30
31	```typescript
32	// create-user.dto.ts
33	import { IsEmail, IsString, MinLength } from 'class-validator';
34	import { ApiProperty } from '@nestjs/swagger';
35
36	export class CreateUserDto {
37	@ApiProperty({ example: 'user@example.com' })
38	@IsEmail()
39	email: string;
40
41	@ApiProperty({ example: 'strongPassword123', minLength: 8 })
42	@IsString()
43	@MinLength(8)
44	password: string;
45	}
46
47	// users.controller.ts
48	import { Body, Controller, Post, HttpCode, HttpStatus } from '@nestjs/common';
49	import { ApiCreatedResponse, ApiTags } from '@nestjs/swagger';
50	import { UsersService } from './users.service';
51	import { CreateUserDto } from './dto/create-user.dto';
52
53	@ApiTags('users')
54	@Controller('users')
55	export class UsersController {
56	constructor(private readonly usersService: UsersService) {}
57
58	@Post()
59	@HttpCode(HttpStatus.CREATED)
60	@ApiCreatedResponse({ description: 'User created successfully.' })
61	create(@Body() createUserDto: CreateUserDto) {
62	return this.usersService.create(createUserDto);
63	}
64	}
65	```
66
67	### Service with Dependency Injection and Error Handling
68
69	```typescript
70	// users.service.ts
71	import { Injectable, ConflictException, NotFoundException } from '@nestjs/common';
72	import { InjectRepository } from '@nestjs/typeorm';
73	import { Repository } from 'typeorm';
74	import { User } from './entities/user.entity';
75	import { CreateUserDto } from './dto/create-user.dto';
76
77	@Injectable()
78	export class UsersService {
79	constructor(
80	@InjectRepository(User)
81	private readonly usersRepository: Repository<User>,
82	) {}
83
84	async create(createUserDto: CreateUserDto): Promise<User> {
85	const existing = await this.usersRepository.findOneBy({ email: createUserDto.email });
86	if (existing) {
87	throw new ConflictException('Email already registered');
88	}
89	const user = this.usersRepository.create(createUserDto);
90	return this.usersRepository.save(user);
91	}
92
93	async findOne(id: number): Promise<User> {
94	const user = await this.usersRepository.findOneBy({ id });
95	if (!user) {
96	throw new NotFoundException(`User #${id} not found`);
97	}
98	return user;
99	}
100	}
101	```
102
103	### Module Definition
104
105	```typescript
106	// users.module.ts
107	import { Module } from '@nestjs/common';
108	import { TypeOrmModule } from '@nestjs/typeorm';
109	import { UsersController } from './users.controller';
110	import { UsersService } from './users.service';
111	import { User } from './entities/user.entity';
112
113	@Module({
114	imports: [TypeOrmModule.forFeature([User])],
115	controllers: [UsersController],
116	providers: [UsersService],
117	exports: [UsersService], // export only when other modules need this service
118	})
119	export class UsersModule {}
120	```
121
122	### Unit Test for Service
123
124	```typescript
125	// users.service.spec.ts
126	import { Test, TestingModule }

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nestjs-expert

4.2kinstalls971forks

View on GitHub

How to install nestjs-expert?

jeffallan/claude-skills/nestjs-expert

$npx -y skills add Jeffallan/claude-skills --skill nestjs-expert

Installs into the current project.

Summary

Files · 1

View on GitHub

SKILL.md

1	# NestJS Expert
2
3	Senior NestJS specialist with deep expertise in enterprise-grade, scalable TypeScript backend applications.
4
5	## Core Workflow
6
7	1. Analyze requirements — Identify modules, endpoints, entities, and relationships
8	2. Design structure — Plan module organization and inter-module dependencies
9	3. Implement — Create modules, services, and controllers with proper DI wiring
10	4. Secure — Add guards, validation pipes, and authentication
11	5. Verify — Run `npm run lint`, `npm run test`, and confirm DI graph with `nest info`
12	6. Test — Write unit tests for services and E2E tests for controllers
13
14	## Reference Guide
15
16	Load detailed guidance based on context:
17
18	\| Topic \| Reference \| Load When \|
19	\|-------\|-----------\|-----------\|
20	\| Controllers \| `references/controllers-routing.md` \| Creating controllers, routing, Swagger docs \|
21	\| Services \| `references/services-di.md` \| Services, dependency injection, providers \|
22	\| DTOs \| `references/dtos-validation.md` \| Validation, class-validator, DTOs \|
23	\| Authentication \| `references/authentication.md` \| JWT, Passport, guards, authorization \|
24	\| Testing \| `references/testing-patterns.md` \| Unit tests, E2E tests, mocking \|
25	\| Express Migration \| `references/migration-from-express.md` \| Migrating from Express.js to NestJS \|
26
27	## Code Examples
28
29	### Controller with DTO Validation and Swagger
30
31	```typescript
32	// create-user.dto.ts
33	import { IsEmail, IsString, MinLength } from 'class-validator';
34	import { ApiProperty } from '@nestjs/swagger';
35
36	export class CreateUserDto {
37	@ApiProperty({ example: 'user@example.com' })
38	@IsEmail()
39	email: string;
40
41	@ApiProperty({ example: 'strongPassword123', minLength: 8 })
42	@IsString()
43	@MinLength(8)
44	password: string;
45	}
46
47	// users.controller.ts
48	import { Body, Controller, Post, HttpCode, HttpStatus } from '@nestjs/common';
49	import { ApiCreatedResponse, ApiTags } from '@nestjs/swagger';
50	import { UsersService } from './users.service';
51	import { CreateUserDto } from './dto/create-user.dto';
52
53	@ApiTags('users')
54	@Controller('users')
55	export class UsersController {
56	constructor(private readonly usersService: UsersService) {}
57
58	@Post()
59	@HttpCode(HttpStatus.CREATED)
60	@ApiCreatedResponse({ description: 'User created successfully.' })
61	create(@Body() createUserDto: CreateUserDto) {
62	return this.usersService.create(createUserDto);
63	}
64	}
65	```
66
67	### Service with Dependency Injection and Error Handling
68
69	```typescript
70	// users.service.ts
71	import { Injectable, ConflictException, NotFoundException } from '@nestjs/common';
72	import { InjectRepository } from '@nestjs/typeorm';
73	import { Repository } from 'typeorm';
74	import { User } from './entities/user.entity';
75	import { CreateUserDto } from './dto/create-user.dto';
76
77	@Injectable()
78	export class UsersService {
79	constructor(
80	@InjectRepository(User)
81	private readonly usersRepository: Repository<User>,
82	) {}
83
84	async create(createUserDto: CreateUserDto): Promise<User> {
85	const existing = await this.usersRepository.findOneBy({ email: createUserDto.email });
86	if (existing) {
87	throw new ConflictException('Email already registered');
88	}
89	const user = this.usersRepository.create(createUserDto);
90	return this.usersRepository.save(user);
91	}
92
93	async findOne(id: number): Promise<User> {
94	const user = await this.usersRepository.findOneBy({ id });
95	if (!user) {
96	throw new NotFoundException(`User #${id} not found`);
97	}
98	return user;
99	}
100	}
101	```
102
103	### Module Definition
104
105	```typescript
106	// users.module.ts
107	import { Module } from '@nestjs/common';
108	import { TypeOrmModule } from '@nestjs/typeorm';
109	import { UsersController } from './users.controller';
110	import { UsersService } from './users.service';
111	import { User } from './entities/user.entity';
112
113	@Module({
114	imports: [TypeOrmModule.forFeature([User])],
115	controllers: [UsersController],
116	providers: [UsersService],
117	exports: [UsersService], // export only when other modules need this service
118	})
119	export class UsersModule {}
120	```
121
122	### Unit Test for Service
123
124	```typescript
125	// users.service.spec.ts
126	import { Test, TestingModule }

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