Prove It Before You Fix It: Why Test-Driven Bug Fixes Save Time and Money

Most developers fix bugs through intuition and code inspection rather than evidence, leading to silent regressions months later when the same issue resurfaces with a different user. This pattern introduces @test-engineer, a systematic approach requiring developers to write failing reproduction tests before any fix code, ensuring root causes are addressed rather than symptoms. Beyond individual efficiency, this shift represents a broader industry trend toward test-driven quality assurance and measurable proof in bug resolution.