---
title: "Optional configs"
description: "Anti-slop, pnpm workspace, e18e, regexp and command integrations."
canonical_url: "https://vinicunca.dev/eslint/configuration/optional-configs"
---
# Optional configs

> Anti-slop, pnpm workspace, e18e, regexp and command integrations.

These integrations are either opt-in, auto-detected, or always on. See the [options reference](https://vinicunca.dev/eslint/configuration/options) for every key.

## Antislop

**Experimental.** On by default since v6. Guards against low-value patterns that often show up in generated code.

```js [eslint.config.js]
import { vinicuncaESLint } from '@vinicunca/eslint-config';

export default vinicuncaESLint({
  // Turn the rules off
  antislop: false,
});
```

`eslint-plugin-slop` and `eslint-plugin-sonarjs` are dependencies of this config, so you don't install them yourself. The enabled rule set is maintained in-house and may change without a semver bump.

**slop** (`boolean | OptionsSlop`): Defaults to true when antislop is on. slop/no-em-dash runs on every file type the config lints (source, JSON, YAML, TOML, Markdown and so on), except code blocks inside Markdown, which are already checked as part of the Markdown text. An object is forwarded as settings.slop (cwd, inspection: 'full' | 'uncommitted' | 'recent-changes').

**sonarjs** (`boolean`): Defaults to true. A curated subset (duplicated branches, dead stores, identical expressions, and similar) — not the plugin's full recommended set.

**cognitiveComplexity** (`number | false`): Defaults to 15. Pass false to disable sonarjs/cognitive-complexity.

**overrides** (`Rules`): Merged into vinicunca/antislop/rules/javascript.

Pair this with [jscpd](https://github.com/kucherenko/jscpd) and [knip](https://github.com/webpro-nl/knip) for copy-paste and unused-export checks.

## pnpm

**Experimental.** On when a `pnpm-workspace.yaml` exists in the current directory or a parent. Uses `eslint-plugin-pnpm`.

```js [eslint.config.js]
export default vinicuncaESLint({
  pnpm: {
    catalogs: true,
    sort: true,
  },
});
```

**catalogs** (`boolean`): Defaults to true when the workspace file mentions catalog: or catalogs:. Enforces catalog usage in package.json.

**json** (`boolean`): Defaults to true unless jsonc is false. Lints package.json (pnpm/json-prefer-workspace-settings, pnpm/json-valid-catalog).

**yaml** (`boolean`): Defaults to true unless yaml is false. Lints pnpm-workspace.yaml (unused/duplicate catalog items, plus pnpm/yaml-enforce-settings for shellEmulator, trustPolicy: 'no-downgrade' and minimumReleaseAgeExcludePrune).

**sort** (`boolean`): Defaults to true (the type docs say false). Sorts keys in pnpm-workspace.yaml.

Catalog autofixes are skipped in the editor (`autofix: !isInEditor`).

## e18e

On by default. Rules from [@e18e/eslint-plugin](https://github.com/e18e/eslint-plugin) for modern APIs and faster patterns.

```js [eslint.config.js]
export default vinicuncaESLint({
  e18e: {
    modernization: true,
    performanceImprovements: true,
    moduleReplacements: false,
  },
});
```

**modernization** (`boolean`): Defaults to true.

**performanceImprovements** (`boolean`): Defaults to true.

**moduleReplacements** (`boolean`): Defaults to false in practice. The type docs say type === 'lib' && isInEditor, but the factory does not pass type into this integration.

Always off unless you override them: `e18e/prefer-static-regex` (because `type` inside the integration stays `'app'`), `e18e/prefer-array-at`, `e18e/prefer-array-from-map`, `e18e/prefer-array-to-reversed`, `e18e/prefer-array-to-sorted`, `e18e/prefer-array-to-spliced`, `e18e/prefer-spread-syntax`.

## Regexp

On by default. [eslint-plugin-regexp](https://ota-meshi.github.io/eslint-plugin-regexp/) recommended rules.

```js [eslint.config.js]
export default vinicuncaESLint({
  regexp: { level: 'warn' },
});
```

`level: 'warn'` downgrades every error to a warning. Use `overrides` for individual rules.

## Command

Always on. There is no option to disable it. [eslint-plugin-command](https://www.npmjs.com/package/eslint-plugin-command) lets you run one-shot code transforms from comments (for example `/// to-function`). Config name: `vinicunca/command/rules`.

To drop it:

```js [eslint.config.js]
export default vinicuncaESLint().remove('vinicunca/command/rules');
```


## Sitemap

See the full [sitemap](https://vinicunca.dev/sitemap.md) for all pages.