skills / mindrally / skills / nestjs-clean-typescript 
nestjs-clean-typescript 
$ npx skills add https://github.com/mindrally/skills --skill nestjs-clean-typescript SKILL.md 
NestJS Clean TypeScript 
Guidelines by Alberto Basalo for developing clean NestJS APIs using TypeScript. These rules emphasize strong typing, clean code principles, and architectural best practices. 
TypeScript General Principles 
Always declare the type of each variable and function (parameters and return value) 
Avoid using any; create necessary types instead 
Use JSDoc for public classes and methods 
One export per file 
Naming Conventions 
PascalCase for classes 
camelCase for variables and functions 
kebab-case for files and directories 
UPPERCASE for environment variables 
Boolean variables use prefixes: isX, hasX, canX 
Function Design 
Write short functions with a single purpose. Less than 20 instructions 
Use early returns to avoid nesting 
Apply RO-RO pattern: pass objects for multiple parameters, return objects for results 
Data and Classes 
Prefer immutability for data with readonly and as const 
Follow SOLID principles 
Classes should have: 
Less than 200 instructions 
Fewer than 10 public methods 
Fewer than 10 properties 
NestJS Specific Guidelines 
Use modular architecture with one module per domain/route 
Use MikroORM entities for persistence 
One service per entity 
DTOs validated with class-validator 
Global filters, middlewares, guards, and interceptors in core module 
Testing 
Use Jest framework 
Follow Arrange-Act-Assert convention 
Write unit tests for each public function 
Include end-to-end tests per API module Weekly Installs 51 Repository mindrally/skills First Seen Jan 25, 2026 Security Audits Gen Agent Trust Hub Pass Socket Pass Snyk Pass Installed on gemini-cli 38 opencode 36 claude-code 30 github-copilot 29 codex 29 cursor 29