TL;DR

The issue can be fixed by configuring the test environment to use a temporary directory for writing test files instead of the source directory.

Guidance

• Identify the test configuration that is causing the creation of packages/core/.gitignore and packages/core/.geminiingore files in the source directory.
• Update the test configuration to use a temporary directory for test files, ensuring that these files are properly cleaned up after the tests are completed.
• Verify that the test environment is correctly configured by running the tests and checking that the temporary files are not created in the source directory.
• Consider setting up a tmp or test_tmp directory in the project root to store temporary test files.

Example

No specific code snippet can be provided without more information about the test framework and configuration being used.

Notes

The exact solution will depend on the specific test framework and configuration being used, which is not provided in the issue description.

Recommendation

Apply workaround: Update the test configuration to use a temporary directory for test files, as this will prevent the creation of orphaned files in the source directory without requiring any external upgrades or changes.