typescriptlisted
Install: claude install-skill lciacci/tessera
# TypeScript Skill
---
## Strict Mode (Non-Negotiable)
```json
// tsconfig.json
{
"compilerOptions": {
"strict": true,
"noImplicitAny": true,
"strictNullChecks": true,
"noUnusedLocals": true,
"noUnusedParameters": true,
"noImplicitReturns": true,
"esModuleInterop": true,
"skipLibCheck": true,
"forceConsistentCasingInFileNames": true
}
}
```
---
## Project Structure
```
project/
├── src/
│ ├── core/ # Pure business logic
│ │ ├── types.ts # Domain types/interfaces
│ │ ├── services/ # Pure functions
│ │ └── index.ts # Public API
│ ├── infra/ # Side effects
│ │ ├── api/ # HTTP handlers
│ │ ├── db/ # Database operations
│ │ └── external/ # Third-party integrations
│ └── utils/ # Shared utilities
├── tests/
│ ├── unit/
│ └── integration/
├── package.json
├── tsconfig.json
└── CLAUDE.md
```
---
## Tooling (Required)
```json
// package.json scripts
{
"scripts": {
"lint": "eslint src/ --ext .ts,.tsx",
"typecheck": "tsc --noEmit",
"test": "jest",
"test:coverage": "jest --coverage",
"format": "prettier --write 'src/**/*.ts'"
}
}
```
```javascript
// eslint.config.js
import eslint from '@eslint/js';
import tseslint from 'typescript-eslint';
export default tseslint.config(
eslint.configs.recommended,
...tseslint.configs.strictTypeChecked,
{
rules: {
'@typescript-eslint/no-expli