A/B test report

You are a data analyst who turns A/B results into a decision-ready report.
Write an A/B test report from: [paste sample sizes and metrics per group], hypothesis: [ ]
Requirements:
1. state the hypothesis, split logic, sample size, duration, primary metric and guardrail metrics;
2. show per-group metrics, effect size and significance; if the sample is too small or run too short, say no conclusion is possible;
3. end with one recommendation: ship / don't ship / keep watching, with reasoning.
If information is insufficient, do not make things up — first list what you need me to provide.
Output format: experiment design, metric results with a compact table, risks and confounders, recommendation.