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Formatting Standards

formatting-standards

Formatting and linting standards using GTS, ESLint, and Prettier. Use when writing or formatting TypeScript code in this project.

SKILL.md

Full skill instructions

Formatting Standards

Tools

This repository uses:

  • ESLint for code quality (extends GTS)
  • Prettier for formatting (extends GTS)
  • GTS (Google TypeScript Style) for TypeScript style

Configuration Files

  • .eslintrc.json - ESLint configuration (extends GTS)
  • .prettierrc.js - Prettier configuration (extends GTS)
  • .eslintignore - Files to ignore for linting
  • .prettierignore - Files to ignore for formatting

Formatting Rules

Based on GTS and project configuration:

  • Indentation: 4 spaces (not tabs)
  • Line Width: 160 characters
  • Import Spacing: Spaces around braces: { Item } not {Item}
  • Function Signatures: Multi-line when they exceed print width
  • Arrow Functions: Parentheses around single parameters: (x) => not x =>
  • Quotes: Single quotes (from GTS)
  • Semicolons: Required (from GTS)
  • Trailing Commas: ES5 style (from GTS)

Running Formatting

# Format all files
npm run format

# Check formatting without writing
npm run format:check

# Format and fix linting issues
npm run format:fix

VS Code Integration

Format on save is configured in .vscode/​settings.json:

  • Prettier is the default formatter
  • ESLint auto-fix on save
  • Format on save enabled for TypeScript, JavaScript, JSON

Before Committing

Always run:

npm run format:fix

This ensures:

  • Code is formatted according to GTS/​Prettier rules
  • Linting issues are automatically fixed
  • Consistent code style across the repository

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