@kumix/eslint-config

Common ESLint configuration.

This package is only available via ES Modules and requires ESLint 9 or greater, since it uses flat configs.

Installation

bun add -D @kumix/eslint-config eslint typescript

Configuration

This package exposes a single flat config, designed to run alongside @kumix/biome-config (Biome handles formatting and import sorting, ESLint handles type-aware linting).

It is available under the fast named export.

// eslint.config.js
import { configs } from "@kumix/eslint-config";

export default [
  ...configs.fast,
  {
    languageOptions: {
      parserOptions: {
        tsconfigRootDir: import.meta.dirname,
      },
    },
  },
];

What's included

• ESLint recommended rules (@eslint/js)
• typescript-eslint strictTypeChecked + stylisticTypeChecked (type-aware)
• Turborepo config (eslint-config-turbo)
• Browser, ES2024, and worker globals; CommonJS handling for *.cjs and common config files
• Type checking disabled for plain .js/.cjs/.mjs files
• Ignores: **/.wrangler/**, dist/**, and Vite timestamp files

Custom rules

• @typescript-eslint/explicit-member-accessibility: error (no public keyword)
• @typescript-eslint/naming-convention: private members must be camelCase with a leading underscore
• no-unused-vars / @typescript-eslint/no-unused-vars: off (handled by Biome)
• @typescript-eslint/no-non-null-assertion: off (handled by Biome)

Biome Integration

This config intentionally leaves formatting and import sorting to Biome, and focuses ESLint on type-aware linting that Biome can't do. Rules already covered by Biome (unused variables, == vs ===, non-null assertions) are turned off here to avoid duplicate reporting.

For the best experience, pair it with @kumix/biome-config:

bun add -D @kumix/biome-config @biomejs/biome

// biome.jsonc
{
  "$schema": "https://biomejs.dev/schemas/latest/schema.json",
  "extends": ["@kumix/biome-config/base"],
}

Division of responsibilities

| Concern | Handled by | | ----------------------------------------- | ---------- | | Formatting | Biome | | Import sorting / organizing | Biome | | Unused imports / variables | Biome | | == vs === (noDoubleEquals) | Biome | | Type-aware linting (strictTypeChecked) | ESLint | | Stylistic type rules | ESLint | | Naming conventions & member accessibility | ESLint |

Links

• npm Package
• Contributing Guide
• Code of Conduct
• License

License

MIT © Kumix Labs