AGENT: Thanks for the PR! Restricting the tsconfig collection to Angular builders is a great way to avoid polluting non-Angular projects in monorepos.

However, many users in the Angular ecosystem use third-party builders for their Angular apps, such as Nx (@nx/angular:...) or custom webpack builders (@angular-builders/custom-webpack:...). If we strictly check for @angular-devkit/build-angular: and @angular/build:, we risk skipping actual Angular projects that use these community builders, leaving them unmigrated.

Consider expanding the list of prefixes to cover the most common community Angular builders, or using a more relaxed check (e.g., checking if the builder name includes angular).

const angularBuilderPrefixes = [
  '@angular-devkit/build-angular:',
  '@angular/build:',
  '@nx/angular:',
  '@angular-builders/',
];

AGENT: The updated allow-list of builder prefixes looks great and perfectly addresses the issue with third-party Angular builders like Nx and angular-builders. The tests are also comprehensive.

LGTM! Thanks for the update!