Prerequisites

• I've read the relevant documentation
• I've searched for existing issues
• I've read the issue reproduction guide

Reproduction url

https://github.com/iwan-uschka/knip-plugin-next-js-page-extensions

Reproduction access

• I've made sure the reproduction is publicly accessible

Good version

5.88.1

Bad version

6.0.1

Description of the regression

In a monorepo i have a package packages/tsconfig containing a tsconfig JSON file referencing 3 different index.d.ts. These files are not recognized or evaluated anymore since the major update to version 6.

In https://github.com/iwan-uschka/knip-plugin-next-js-page-extensions you can see the different output of knip between 5.88.1 (iwan-uschka/knip-plugin-next-js-page-extensions@263b84b):

✂️ Excellent, Knip found no issues.

And 6.0.1 (iwan-uschka/knip-plugin-next-js-page-extensions@2d1f24b):

Unused files (3)
packages/tsconfig/types/globals/index.d.ts
packages/tsconfig/types/soundcloud/index.d.ts
packages/tsconfig/types/styles/index.d.ts
Unused dependencies (1)
type-fest packages/tsconfig/package.json:10:6

Same with 6.0.0.

Maybe this issue is related to #1628.