typescript-best-practices is agent-read markdown (skill) from hoangnguyen0403/agent-skills-standard: Write idiomatic TypeScript patterns for clean, maintainable code. Use when writing or refactoring TypeScript classes, functions, modules, or async logic..
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What the file says
# TypeScript Best Practices
## **Priority: P1 (HIGH)**
## Implementation Guidelines
- **Naming**: Use **`PascalCase`** for Classes/Types/Interfaces, **`camelCase`** for variables/functions, and **`UPPER_SNAKE`** for static constants.
- **Functions**: Use **`arrow functions`** for callbacks/logic; **`function declaration`** for top-level exports. Always type **`public API`** returns.
- **Modules**: Use **`Named exports`** ONLY to enable better refactoring/auto-imports.
- **Async**: Use **`async/await`** with **`Promise.all()`** for parallel execution. Implement **`try-catch`** for error handling; type **`catch(e) as unknown`** and narrow before use. Avoid **`.then().catch()`** chains.
- **Classes**: Explicitly use **`private`**, **`protected`**, and **`public`** modifiers. Favor **`composition`** over inheritance and **`dependency injection`** with **`constructor injection`** and interfaces over singletons for testability.
- **Type Safety**: Use **`never`** for exhaustiveness checks in switch-cases.
- **Optional**: Use **`optional chaining`** (`?.`) and **`nullish coalescing`** (`??`) over manual checks.
…
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