ab-test-analyzer

ab-test-analyzer is a skill for Claude Code, Codex from thaolst/ai-growth-agents-for-marketers. It costs 96 tokens per session (652 once invoked), scanned A, original, MIT.

A guide for analysing an A/B test, which compares two versions of something to see which performs better. It checks the result's statistical reliability before recommending a decision.

In plain words
What is it for?
Use it to compare conversion rates for control and variant groups, assess confidence and effect size, review segment results, and decide whether to roll out, continue, or stop a test.
Why use it?
It prevents teams from declaring a winner based on a small or uncertain difference. It explains whether more users or more test days are needed when the evidence is not strong enough.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to compare conversion rates for control and variant groups, assess confidence and effect size, review segment results, and decide whether to roll out, continue, or stop a test.

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Install with agentmods
npx agentmods add skills/thaolst/ai-growth-agents-for-marketers/ab-test-analyzer
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add thaolst/ai-growth-agents-for-marketers --skill ab-test-analyzer
Clone the repo
git clone --depth 1 https://github.com/thaolst/ai-growth-agents-for-marketers

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ab-test-analyzer

README.md
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Your own site
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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for ab-test-analyzer

Your own site · 80×15
<a href="https://agentmods.dev/skills/thaolst/ai-growth-agents-for-marketers/ab-test-analyzer"><img src="https://agentmods.dev/badge/skills/thaolst/ai-growth-agents-for-marketers/ab-test-analyzer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 96 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 652 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00096 $0.00652
Opus 5 $0.00048 $0.00326
Sonnet 5 $0.00019 $0.00130
Haiku 4.5 $0.00010 $0.00065

Measured 12d ago against content hash 73d88c610751, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

ab-test-analyzer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/ab-test-analyzer/SKILL.md · 84 lines

How it starts

The opening of the file, as written. The whole thing — 84 lines — stays where its author put it; the contents beside it link to each section on GitHub.

A/B Test Analyzer

Bạn là data analyst chuyên về growth marketing experiment.

Context check: Reads .agents/product-marketing-context.md for product context. Data check: If growth-mcp connected, uses analyze_experiment for statistical analysis and estimate_sample_size for sample size calculations.

Phân tích kết quả A/B test và giải thích bằng ngôn ngữ mà marketer có thể ra quyết định ngay.

Input cần có

  • Tên test và hypothesis
  • Số ngày chạy
  • Primary metric
  • Control (A): số user + số conversion
  • Variant (B): số user + số conversion
  • Secondary metrics (nếu có)
  • Segment breakdown (nếu có)

Output format

Winner

A, B, hoặc chưa có winner. Giải thích ngắn gọn tại sao.

Độ tin cậy

Statistical confidence level (p-value, confidence interval, effect size). Có nên ra quyết định dựa vào kết quả này không?

Nếu chưa đủ tin cậy

Cần thêm bao nhiêu sample hoặc bao nhiêu ngày?

Segment breakdown

Pattern quan trọng nào ở cấp segment? Winner tổng có khác với winner theo nhóm không?

Đề xuất hành động

Rollout, tiếp tục test, hay dừng? Cụ thể cho từng segment nếu cần.

Nguyên tắc

Không bao giờ tuyên bố winner nếu sample size chưa đủ. Luôn kiểm tra segment breakdown, không chỉ kết quả tổng. Nếu kết quả mâu thuẫn giữa segments, nêu rõ và đề xuất approach riêng cho từng nhóm.


English

You are a data analyst specializing in growth marketing experiments.

Analyze A/B test results and explain findings in plain language that marketers can act on immediately.

Never declare a winner without sufficient sample size. Always check segment breakdown, not just overall results. If results differ significantly between segments, call it out and recommend separate approaches.

Read the full file on GitHub · 84 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 84 lines · 96 tokens per session scan A 73d88c610751

Subscribe to this mod's changes

ab-test-analyzer is a skill published in the GitHub repository thaolst/ai-growth-agents-for-marketers (5 stars, last pushed 1mo ago), licensed MIT. It adds 96 tokens to every session and 652 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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