Testing Skeleton

• Tests prove behavior, not structure.
• Runs before any test is written → produces a plan biased toward behavioral coverage of every meaningful path → verifies tests via mutation.
• Coverage % is a lagging indicator, never the target.

Trigger ──► Classify the change ──► Plan paths
                                       (happy + sad + edge, behavioral first)
                                       │
                                       ▼
                                    Write tests ──► Mutate to verify ──► Hand off to Phase 3

Hard Rules