send-experiment-designer

send-experiment-designer is a skill for Claude Code from aaron-he-zhu/aaron-marketing-skills. It costs 146 tokens per session (3,986 once invoked), scanned A, original, Apache-2.0.

A workflow for designing and interpreting email experiments, such as A/B tests, multivariate tests, send-time tests, and hold-out tests. It defines what changes between groups, how many recipients are needed, how long to run the test, and what the results mean.

In plain words
What is it for?
Use it to compare email subjects, preheaders, calls to action, creative, sending times, or sending versus not sending, with a stated hypothesis and measurement plan.
Why use it?
It helps avoid tests where several factors change at once or the audience is too small to support a useful conclusion. It separates statistical results from the final business decision.

Skill for Claude Code

Written for Claude Code: argument-hint in frontmatter. Also seen: mentions Claude Code; built for openclaw.

Runs only inside its plugin — its command needs a path that Claude Code sets for a plugin’s own hooks and for nothing else. Install the plugin, not this.

Part of the aaron-marketing plugin — 120 skills shipped together , and of aaron-marketing

Good fit Use it to compare email subjects, preheaders, calls to action, creative, sending times, or sending versus not sending, with a stated hypothesis and measurement plan.

Compare 6 skills from other repositories ↓
About the project

aaron-marketing-skills is a collection of 120 AI-agent skills covering marketing work such as brand narrative, search optimization, social media, email, advertising, influencer campaigns, and launches. Marketers and agent users can install it as a plugin, use its portable skills, or run its described bot team. The catalogue entries are components of this marketing workflow.

aaron-he-zhu/aaron-marketing-skills · 2,767 stars · on GitHub · aaronmarketing.ai

Install

Getting it into your agent

This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.

Claude Code
/plugin marketplace add aaron-he-zhu/aaron-marketing-skills
Claude Code
/plugin install aaron-marketing

Made for: Claude Code.

Or install aaron-marketing, the plugin that ships this one along with the rest of its 120 skills.

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 send-experiment-designer

README.md
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Your own site
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Your own site · 80×15
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Per session 146 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,986 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. Third-party audits
  • Socket pass 2 Sept 2026
  • Snyk pass 2 Sept 2026
How audits are shown
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 $0.00146 $0.03986
Opus 5 $0.00073 $0.01993
Sonnet 5 $0.00029 $0.00797
Haiku 4.5 $0.00015 $0.00399

Measured 10d ago against content hash 7d0f3e2825a4, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

send-experiment-designer 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.

email/deliver/send-experiment-designer/SKILL.md · 139 lines

How it starts

The opening of the file, as written. The whole thing — 139 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Send Experiment Designer

Designs email experiments across four modes and reads them out: a falsifiable hypothesis, a variant matrix that isolates one variable per cell, a sample-size / minimum-detectable-effect / run-duration / power plan, and a documented effect/uncertainty read. It may apply an owner-approved precommitted action rule, but statistical output alone never chooses a business action.

Mode set (pick one):

Mode Isolated variable Primary metric
a-b one change — subject or preheader or CTA or creative open (subject) / click / CTOR (CTA/creative)
multivariate 2+ factors crossed (e.g. subject × CTA), one variable per cell the goal metric, powered per cell
send-time deploy hour/day; subject, segment, creative held constant same-window engagement (open/click)
hold-out send vs no-send (randomized control receives nothing / current default) conversion or revenue-per-recipient (incremental lift)

Default the mode from the request when it is unambiguous (e.g. "test two subject lines" → a-b, "best hour to send" → send-time, "measure incremental revenue" → hold-out); state the picked mode back and proceed.

Scope guard: this skill owns email experiment design + the significance read only. It scores the SEND E (Engagement) lever as a test signal — it does not compute the profile-weighted EQS or run the S1/S2/N1/D1 vetoes (email-quality-auditor does), and it does not write the subject/preheader/body/CTA under test (email-creative-builder does). Design here, produce there, gate there.

Quick Start

Design an A/B subject-line test. Baseline open rate is 38%, I want to detect a 3-point lift. Goal is retention, list is 12,000.
Send-time test: what's the best hour to deploy my weekly newsletter? Baseline open 40%, list 20,000.
I have a 2×2 subject × CTA multivariate idea and a hold-out. Build the variant matrix, sample size per cell, and run duration. Baseline click 2.1%.
Here's my finished test export (variant, delivered, opens, clicks, conversions). Is the winner significant — promote or kill?

Read the full file on GitHub · 139 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. 10d ago Changed · +1 lines 7d0f3e2825a4
  2. 13d ago First seen · 138 lines · 146 tokens per session scan A 680ae64c0dcd

Subscribe to this mod's changes

send-experiment-designer is a skill published in the GitHub repository aaron-he-zhu/aaron-marketing-skills (2,767 stars, last pushed today), licensed Apache-2.0. It adds 146 tokens to every session and 3,986 once invoked, about $0.0007 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.