Quality-First TDD

Priority: P0 (CRITICAL)

A passing test is insufficient; the test must prove an owned behavior and a distinct plausible fault.

Choose the mode

• New behavior: strict RED -> GREEN -> REFACTOR. Do not write production code before the expected RED.
• Legacy or bug fix: characterize only when needed, then reproduce the intended change as a failing regression (RED). Preserve unrelated existing code; do not delete it merely because it predates the test.

Before writing a test

Create one Test Intent Record per behavior/risk: