@system-inc/base-lint

Shared ESLint configuration and custom rules for Base and projects built on it. Bundles the community plugins the stack standardizes on and adds type-aware rules that enforce contracts TypeScript can't catch alone — keeping decorator metadata in sync with TypeScript types (GraphQL/ORM nullability, DI inject types, validation optionality) and guarding architectural boundaries.

Pure ESM — the .mjs files are the published artifact (no build step).

npm install -D @system-inc/base-lint

Peers: eslint, typescript, typescript-eslint, @typescript-eslint/utils, @system-inc/nexus.

Usage

In your flat config (eslint.config.mjs), spread the three exports:

import tseslint from 'typescript-eslint';

import {
    baseIgnores,
    baseJavaScriptAndTypeScriptPlugins,
    baseJavaScriptAndTypeScriptRules,
} from '@system-inc/base-lint/BaseRules.mjs';

export default tseslint.config({
    ignores: baseIgnores,
    plugins: baseJavaScriptAndTypeScriptPlugins,
    rules: baseJavaScriptAndTypeScriptRules,
    // ...your languageOptions / project service config
});

Consumers may override rule severities or pass rule options (e.g. the protected context keys for context-requires-access).

See CLAUDE.md for the full list of custom rules and what each enforces.

Part of the Base monorepo.