ad-creative-test-plan@r1

Publisher claims: "Design a pre-launch ad creative test plan - falsifiable hypothesis, isolation level, test cells with per-cell budgets, required sample, spend and duration, and kill/scale rules pre-registered before any money moves. Every cell carries an explicit read standard, so an underpowered screen is never dressed up as an A/B test. Use whenever the user wants to test ads, mentions an A/B or split test on creative, asks how much budget or how long a test needs, or mentions sample size, statistical significance, single-variable vs big-swing testing, or test cell structure - even if they never say 'test plan'. Covers B2B and B2C. Do NOT use to read results from a test already running - use mbfinotti/advertising-skills@ad-creative-fatigue instead." Observed in sandbox: no network, touches nothing outside the project, writes no memory.