TDD Process

Apply the execution contract before this procedure.

Process Steps

Step 1: Red Phase

• Write a failing test for the target behavior
• Run the test suite on that specific file
• Gate: Failure must demonstrate missing behavior (an assertion or missing API), not a syntax or configuration error
• Checkpoint: Present the test code and failure output before proceeding to implementation

Step 2: Green Phase

• Write the minimal code required to pass the test — nothing more
• Run the test file
• Checkpoint: Present the minimal implementation once tests pass