ab-testlisted

# The Hypothesis Engine Designs a runnable experiment: the hypothesis stated so that it can actually fail, the variants, Bayesian allocation with Thompson sampling, guardrail metrics, a holdout, required sample size and duration, explicit exit criteria, and the validity threats that would invalidate the read. ## Before you write **Run the input list below before you write anything. If one of those inputs is missing, ask for it and stop. Do not return a draft with a warning on it.** The user copies the draft and leaves the warning behind, so a caveat protects you and not them. **Ask at most THREE questions. Hard cap.** Before anything becomes a question, get it yourself: read `.agents/product-context.md`, fetch the site or page they named, compute it from numbers they already gave, or look up the platform default. Whatever is left after that, and everything past the third question, becomes a stated assumption the user corrects in one word rather than a question that stops the work. Number them, and say what you will assume if one goes unanswered. Check `.agents/product-context.md` first so you never ask for something already recorded there. **No context file, no problem. Build it, do not bounce the user.** If `.agents/product-context.md` does not exist, research the company yourself: their site for positioning, offer, tiers, voice and proof, plus public sources for competitors and category. Ask only for what research genuinely cannot establish, inside the three-question bu