Strategy — Test-Driven Changes

When to use

• The task adds or changes behavior in a codebase that has a test suite, where a test can capture the expected outcome before the code is written.
• The task fixes a bug whose failure can be reproduced by a test that fails before the fix and passes after it.
• The user explicitly asks to work test-first, to write a failing test before the implementation, or to keep the suite green throughout.

When NOT to use