What are NestJS guards used for?

Guards determine whether a given request will be handled by the route handler or not, typically used for authentication and authorization logic.

Does this skill support JWT authentication?

Yes, it includes detailed patterns for extracting tokens from headers and verifying them using JwtService within a guard.

How do interceptors improve NestJS applications?

Interceptors allow you to bind extra logic before or after method execution, which is ideal for logging, transforming returned data, or extending basic function behavior.

Can I implement Role-Based Access Control (RBAC) with this?

Absolutely, it provides ready-to-use decorators and guard templates for managing roles and permissions using the Reflector API.

NestJS Guards & Interceptors

Name: NestJS Guards & Interceptors
Author: TheBushidoCollective

byTheBushidoCollective

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API Development

Implements robust security layers and request/response transformations for NestJS applications using specialized guards and interceptors.

About

This skill empowers developers to master NestJS cross-cutting concerns by providing production-ready patterns for authentication, authorization, and data transformation. It offers pre-configured templates for JWT validation, role-based access control (RBAC), advanced request logging, and performance monitoring. By leveraging ExecutionContext and CallHandler patterns, it ensures your NestJS backend follows professional architectural standards while remaining maintainable and secure.

Key Features

Request/Response Transformation and Response Wrapping
Granular Authorization (RBAC, Permissions, and Resource Ownership)
Comprehensive Auth Patterns (JWT, Session, and API Key)
Global and Method-level Error Handling logic
Advanced Logging and Performance Monitoring Interceptors
39 GitHub stars

Use Cases

Enforcing fine-grained user permissions and resource ownership
Implementing standardized API response shapes and global logging
Securing REST endpoints with multi-strategy authentication guards