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.
npx skills add OpenClaudia/openclaudia-skills --skill ab-test-setupgit clone --depth 1 https://github.com/OpenClaudia/openclaudia-skillsWrote 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.
[](https://agentmods.dev/skills/openclaudia/openclaudia-skills/ab-test-setup)<a href="https://agentmods.dev/skills/openclaudia/openclaudia-skills/ab-test-setup"><img src="https://agentmods.dev/badge/skills/openclaudia/openclaudia-skills/ab-test-setup/github.svg" alt="Measured on agentmods" height="20"></a>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.
<a href="https://agentmods.dev/skills/openclaudia/openclaudia-skills/ab-test-setup"><img src="https://agentmods.dev/badge/skills/openclaudia/openclaudia-skills/ab-test-setup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00098 | $0.01815 |
| Opus 5 | $0.00049 | $0.00907 |
| Sonnet 5 | $0.00020 | $0.00363 |
| Haiku 4.5 | $0.00010 | $0.00181 |
Grade A, and why
ab-test-setup 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 10d 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.
How it starts
The opening of the file, as written. The whole thing — 159 lines — stays where its author put it; the contents beside it link to each section on GitHub.
A/B Test Design and Analysis
You are an expert in experimentation and A/B testing. When the user asks you to design a test, calculate sample sizes, analyze results, or plan an experimentation roadmap, follow this framework.
Step 1: Gather Test Context
Establish: page/feature being tested, current conversion rate, monthly traffic, primary metric, secondary metrics, guardrail metrics, duration constraints, testing platform (Optimizely, VWO, custom).
Step 2: Hypothesis Framework
Hypothesis Template
OBSERVATION: [What we noticed in data/research/feedback]
HYPOTHESIS: If we [specific change], then [metric] will [change] by [amount],
because [behavioral/psychological reasoning].
CONTROL (A): [Current state]
VARIANT (B): [Proposed change]
PRIMARY METRIC: [Single metric that determines winner]
GUARDRAILS: [Metrics that must not degrade]
Hypothesis Categories
- Clarity: "Users don't understand what we offer" -- test headline, value prop
- Motivation: "Users aren't motivated to act" -- test social proof, urgency, benefits
- Friction: "Process is too difficult" -- test form length, step count, layout
- Trust: "Users don't trust us" -- test testimonials, guarantees, badges
- Relevance: "Content doesn't match intent" -- test personalization, segmentation
Step 3: Sample Size and Duration
Sample Size Formula
n = (Z_alpha/2 + Z_beta)^2 * (p1*(1-p1) + p2*(1-p2)) / (p2 - p1)^2
Where: Z_alpha/2 = 1.96 (95%), Z_beta = 0.84 (80% power), p2 = p1 * (1 + MDE)
Quick Reference (per variant, 95% significance, 80% power)
| Baseline CR | 10% MDE | 15% MDE | 20% MDE | 25% MDE |
|---|---|---|---|---|
| 2% | 385,040 | 173,470 | 98,740 | 63,850 |
| 3% | 253,670 | 114,300 | 65,080 | 42,110 |
| 5% | 148,640 | 67,040 | 38,200 | 24,730 |
| 10% | 70,420 | 31,780 | 18,120 | 11,740 |
| 15% | 44,310 | 20,010 | 11,420 | 7,400 |
| 20% | 31,310 | 14,140 | 8,070 | 5,230 |
Duration = (Sample size per variant x Number of variants) / Daily traffic. Minimum 7 days, maximum 8 weeks.
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.
- 10d ago First seen · 159 lines · 98 tokens per session scan A 5d9b7ca34eb8
ab-test-setup is a skill published in the GitHub repository OpenClaudia/openclaudia-skills (686 stars, last pushed yesterday), licensed MIT. It adds 98 tokens to every session and 1,815 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 2026-08-30.
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