$npx -y skills add openai/codex --skill code-review-testingTest authoring guidance
| 1 | For agent changes prefer integration tests over unit tests. Integration tests are under `core/suite` and use `test_codex` to set up a test instance of codex. |
| 2 | |
| 3 | Features that change the agent logic MUST add an integration test: |
| 4 | - Provide a list of major logic changes and user-facing behaviors that need to be tested. |
| 5 | |
| 6 | If unit tests are needed, put them in a dedicated test file (*_tests.rs). |
| 7 | Avoid test-only functions in the main implementation. |
| 8 | |
| 9 | Check whether there are existing helpers to make tests more streamlined and readable. |