nestjs-expert

Use when building NestJS applications requiring modular architecture, dependency injection, or TypeScript backend development. Invoke for modules, controllers, services, DTOs, guards, interceptors, TypeORM/Prisma.

Install with Tessl CLI

npx tessl i github:jeffallan/claude-skills --skill nestjs-expert

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Review — 66%

Does it follow best practices?

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Learn more

Evaluation — 90%

Agent success when using this skill

Validation — 11 / 11 Passed

Validation for skill structure

SKILL.md

Review

Evals

Evaluation results

100%

Product Catalog API

Controller Swagger docs and DTO validation

Criteria

Without context

With context

ApiTags on controller

100%

ApiOperation on endpoints

100%

ApiResponse with status codes

100%

ApiProperty on DTO fields

100%

class-validator decorators

100%

PartialType or OmitType for update DTO

100%

Global ValidationPipe whitelist

100%

Global ValidationPipe transform

100%

ParseUUIDPipe on id params

100%

HttpCode NO_CONTENT on DELETE

100%

No any type

100%

No secrets in response

100%

Without context: $0.6217 · 2m 19s · 29 turns · 29 in / 8,080 out tokens

With context: $0.5548 · 1m 33s · 25 turns · 23 in / 5,997 out tokens

86%

10%

Order Processing Service

Service DI, logger, error handling, unit tests

Criteria

Without context

With context

Constructor DI

100%

Logger instance

NestJS HTTP exceptions

100%

Test.createTestingModule

100%

jest.fn() mocks

33%

44%

afterEach clearAllMocks

100%

NotFoundException test case

100%

Module exports service

100%

@Injectable decorator

100%

No any type

100%

DTOs for inputs

100%

Without context: $0.3154 · 1m 21s · 17 turns · 15 in / 4,507 out tokens

With context: $0.6054 · 1m 57s · 29 turns · 26 in / 5,947 out tokens

85%

Blogging Platform Authentication

JWT auth, guards, roles, configuration

Criteria

Without context

With context

bcrypt cost factor 10

100%

JWT payload fields

100%

Access token expiry 15m

100%

Refresh token expiry 7d

ConfigService for JWT_SECRET

100%

Bearer token extraction

100%

Global guard via APP_GUARD

100%

@Public() decorator

66%

@Roles() with RolesGuard

66%

Password not in response

100%

No hardcoded secrets

100%

Without context: $0.3245 · 1m 5s · 21 turns · 64 in / 4,599 out tokens

With context: $1.1134 · 4m 4s · 42 turns · 91 in / 12,406 out tokens

Evaluated: 20 minutes ago
Agent: Claude Code

Table of Contents

Product Catalog API Order Processing Service Blogging Platform Authentication

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