noctcore-architecture/index-must-reexport-default

A component folder’s index.ts must re-export the sibling default named after the folder.

Recommended preset: error · Autofix: no · Suggestions: no · Type information: not needed

Why

When a component folder’s index.ts re-exports the component default, consumers import the folder (import Card from '@/components/Card') rather than reaching for the inner file (.../Card/Card). The barrel becomes the folder’s single public entry point, and the internal file layout stays free to change.

What it flags

The rule only activates for an index.ts that sits next to a <Folder>.tsx of the same PascalCase name on disk (Card/Card.tsx beside Card/index.ts). For those barrels, it reports when the file never re-exports the sibling’s default export.

Card/index.ts

export { default as Card } from './Card'; // ✓
export { default } from './Card';         // ✓
export * from './Card.types';             // ✗ (on its own — no default re-export)

What it does not flag

• Non-component index.ts files — those whose folder is not PascalCase, or that have no <Folder>.tsx sibling on disk.
• Files other than index.ts, such as Card/Card.helpers.ts.
• A barrel that re-exports the default in either form, alongside any other re-exports.
• Paths matched by ignorePaths.

Options

Option	Type	Default	Meaning
ignorePaths	string[]	[]	Globs (supporting **, *, ?) of paths to skip.

'noctcore-architecture/index-must-reexport-default': ['error', {
  ignorePaths: ['**/ui/**'],
}]

When not to use it

If you do not use barrel files, or you export components as named (not default) exports, this rule does not apply.