To set up automated code review with Semgrep:

1. Create .semgrep.yml and add some rules (more examples):

   rules:
     - id: no_direct_testing_library_import
       pattern: 'import "@testing-library/react"'
       message: |
         Do not directly import React Testing Library. Instead, import it from the `testing-utils` packlet.
       languages: [ts]
       severity: ERROR
       paths:
         exclude:
           - src/packlets/testing-utils/**

2. Run semgrep:

   semgrep