Cannot find module '@stencil/core/internal' after upgrade from version 4.3.0 to 5.2.0

[raphaelgodart]

Prerequisites

• I have read the Contributing Guidelines.
• I have not leaked any internal/restricted information like screenshots, videos, code snippets, links etc.

What happened?

I've performed the upgrade of our project from Siemens iX 4.3.0 to 5.2.0, by following your upgrade guidelines described here: https://ix.siemens.io/docs/home/migration/5_0_0

The upgrade performed by an AI agent and was successfully executed and the project starts up. However, after the upgrade by the AI agent, I noticed that the following entry was added to the compilerOptions array of our project's tsconfig.json:

"skipLibCheck": true

I wondered why this is necessary and removed it. After removing it, the project fails to start up and throws this error:

TS2307: Cannot find module '@stencil/core/internal' 

Why is this happening? Is it expected that we add "skipLibCheck": trueto tsconfig.json in order to avoid this error?

What type of frontend framework are you seeing the problem on?

Angular (Standalone)

On which version of the frontend framework are you experiencing the issue?

@angular/core@20.3.24

Which version of iX do you use?

v5.2.0

Code to produce this issue.

https://stackblitz.com/edit/stackblitz-starters-fwthbfuy?file=src%2Fmain.ts

[benjgil]

@raphaelgodart are you referencing @stencil/core/internal in your project?