codexkit-a-b-test-planner

Plan A/B experiments with hypotheses, sample sizes, and decision rules.

21|12|Updated Mar 20, 2026
One-click install
npx skills add https://github.com/hoavdc/CodexKit --skill codexkit-a-b-test-planner
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: codexkit-a-b-test-planner
Source: https://github.com/hoavdc/CodexKit/tree/main/skills/codexkit-a-b-test-planner
Command: npx skills add https://github.com/hoavdc/CodexKit --skill codexkit-a-b-test-planner

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Design and run statistically rigorous product experiments with clearly defined hypotheses, success criteria, and guardrails to avoid biased conclusions.

Core Features & Use Cases

  • Define falsifiable hypotheses and success criteria for experiments.
  • Compute required sample sizes and study durations from baseline metrics and MDE.
  • Specify randomization plans, exclusion criteria, and rollout rules for safe deployment.
  • Use cases include feature launches, UX optimizations, and funnel experiments across single or multi-variant tests.

Quick Start

Create a complete A/B test plan for a new checkout flow and estimate required sample size.

Frequently Asked Questions about codexkit-a-b-test-planner

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I calculate the required sample size for an A/B test?

To calculate sample size for an A/B test, you need baseline metrics and the minimum detectable effect (MDE) to perform power analysis and estimate study duration.

What are guardrail metrics in A/B testing?

Guardrail metrics in A/B testing are predefined safety criteria that prevent biased conclusions and ensure new product features or UX changes do not negatively impact key business outcomes.

How do I design a hypothesis for a multi-variant experiment?

Designing a hypothesis for a multi-variant experiment involves defining falsifiable success criteria, specifying randomization plans, and setting exclusion rules to ensure statistically rigorous product testing.

Can I use this for sequential A/B tests on funnel optimizations?

Yes, you can apply this to sequential A/B tests for funnel optimizations, feature launches, and UX changes across single or multiple variants to maintain statistical significance.

What is the best way to define rollout criteria for an experiment?

The best way to define rollout criteria is to establish predefined decision rules and randomization plans during A/B test planning to ensure safe deployment of product features.

Why do I need predefined decision rules for A/B testing?

Predefined decision rules are necessary for A/B testing to prevent biased conclusions, enforce guardrails, and provide clear rollout criteria based on statistical significance and hypothesis design.