Ab Testing
coreyhaines31/marketingskills
When the user wants to plan, design, or implement an A/B test or experiment, or build a growth experimentation program.
Summarize experiment results, call a winner, and draft a stakeholder-ready recommendation.
Install Craft Experiment Readout
$ npx skills add amplitude/builder-skills --skill craft-experiment-readout -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install amplitude/builder-skills craft-experiment-readout --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/product-skills/skills/craft-experiment-readout .claude/skills/craft-experiment-readout && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "craft-experiment-readout" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/craft-experiment-readout into .claude/skills/craft-experiment-readout/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "craft-experiment-readout", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/craft-experiment-readoutType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add amplitude/builder-skills --skill craft-experiment-readout -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install amplitude/builder-skills craft-experiment-readout --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/product-skills/skills/craft-experiment-readout .agents/skills/craft-experiment-readout && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "craft-experiment-readout" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/craft-experiment-readout into .agents/skills/craft-experiment-readout/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "craft-experiment-readout", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add amplitude/builder-skills --skill craft-experiment-readout -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install amplitude/builder-skills craft-experiment-readout --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/product-skills/skills/craft-experiment-readout .cursor/skills/craft-experiment-readout && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "craft-experiment-readout" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/craft-experiment-readout into .cursor/skills/craft-experiment-readout/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "craft-experiment-readout", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/amplitude/builder-skills.git --path product-skills/skills/craft-experiment-readout--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add amplitude/builder-skills --skill craft-experiment-readout -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install amplitude/builder-skills craft-experiment-readout --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/product-skills/skills/craft-experiment-readout .gemini/skills/craft-experiment-readout && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "craft-experiment-readout" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/craft-experiment-readout into .gemini/skills/craft-experiment-readout/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "craft-experiment-readout", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install amplitude/builder-skills craft-experiment-readoutInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add amplitude/builder-skills --skill craft-experiment-readout -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/product-skills/skills/craft-experiment-readout .github/skills/craft-experiment-readout && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "craft-experiment-readout" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/craft-experiment-readout into .github/skills/craft-experiment-readout/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "craft-experiment-readout", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add amplitude/builder-skills --skill craft-experiment-readout -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install amplitude/builder-skills craft-experiment-readout --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/amplitude/builder-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/product-skills/skills/craft-experiment-readout .opencode/skills/craft-experiment-readout && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "craft-experiment-readout" agent skill from https://github.com/amplitude/builder-skills/tree/main/product-skills/skills/craft-experiment-readout into .opencode/skills/craft-experiment-readout/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "craft-experiment-readout", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
craft-experiment-readout- GitHub stars
- 160
- Token cost
- ~679 tokens
- SKILL.md length
- 114 words
- Files
- 1
- Skills in repo
- 61
- Repo updated
- First seen
- Licence
- None found
At a glance
Summarize experiment results, call a winner, and draft a stakeholder-ready recommendation.
- An A/B test is complete and you need to communicate results
- SKILL.md covers Prompt Template and Tips
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Tasks that involve A/B testing
What it does
Craft Experiment Readout is an agent skill from amplitude/builder-skills. Summarize experiment results, call a winner, and draft a stakeholder-ready recommendation. Use when an A/B test is complete and you need to communicate results.
Its SKILL.md is about 680 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Marketing & SEO, covering A/B testing. The repository describes itself as: Open-source AI skills for product managers — battle-tested by PMs at Amplitude.
When your agent uses it
- An A/B test is complete and you need to communicate results
- Tasks that involve A/B testing
Example prompts
- “/craft-experiment-readout”
What it can do on your machine
Read from SKILL.md and the folder at commit 51838c2. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Craft Experiment Readout loads about 679 tokens when it runs. Until then it costs about 46 tokens; SKILL.md has 114 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 114 words (~679 tokens).
“Summarize experiment results, call a winner, and draft a stakeholder-ready recommendation.”
- name
- craft-experiment-readout
- suggest_when
- User has experiment results, says "analyze this test", "did it win", "experiment readout", "share results with stakeholders", or needs to make a…
Files
Just SKILL.md in product-skills/skills/craft-experiment-readout of amplitude/builder-skills.
Open the folder on GitHubat commit 51838c2
Compare with similar skills
Craft Experiment Readout next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Craft Experiment Readout this skillamplitude/builder-skills | 160 | — | ~679 | Automated safety check: Pass | None | |
| Ab Testingcoreyhaines31/marketingskills | 54k | 3 repos | ~3.1k | Automated safety check: Pass | MIT | |
| AnalyticsNexus-JPF/note-companion | 870 | 7 repos | ~2.2k | Automated safety check: Pass | MIT | |
| Ad Test Designeraaron-he-zhu/aaron-marketing-skills | 2.9k | 2 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Ab Test Analyzeririnabuht12-oss/marketing-skills | 4k | — | ~1.4k | Automated safety check: Pass | None | |
| Ab Test Store Listingappeeky/aso-skills | 2.2k | — | ~1.8k | Automated safety check: Pass | MIT |
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Ab Test Setup
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Related
Categories
Questions about Craft Experiment Readout
What does Craft Experiment Readout do?
Summarize experiment results, call a winner, and draft a stakeholder-ready recommendation. Craft Experiment Readout is an agent skill from amplitude/builder-skills. Summarize experiment results, call a winner, and draft a stakeholder-ready recommendation.
When should I use Craft Experiment Readout?
Craft Experiment Readout fits situations like: an A/B test is complete and you need to communicate results; tasks that involve A/B testing.
How do I install Craft Experiment Readout in Claude Code?
Run `npx skills add amplitude/builder-skills --skill craft-experiment-readout -a claude-code`. Or copy the skill folder (product-skills/skills/craft-experiment-readout in amplitude/builder-skills) into .claude/skills/craft-experiment-readout in your project. Claude Code loads it when a task matches its description.
How do I install Craft Experiment Readout in Codex?
Run `npx skills add amplitude/builder-skills --skill craft-experiment-readout -a codex`. Or copy the skill folder (product-skills/skills/craft-experiment-readout in amplitude/builder-skills) into .agents/skills/craft-experiment-readout in your project. Codex loads it when a task matches its description.
Can I use Craft Experiment Readout in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add amplitude/builder-skills --skill craft-experiment-readout -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/craft-experiment-readout, .gemini/skills/craft-experiment-readout, .github/skills/craft-experiment-readout and .opencode/skills/craft-experiment-readout in your project.
What does Craft Experiment Readout need to run?
SKILL.md names no scripts, command-line tools or credentials: Craft Experiment Readout is instructions for the agent only.
Does Craft Experiment Readout access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Craft Experiment Readout safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Craft Experiment Readout use?
No licence was found for Craft Experiment Readout or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Craft Experiment Readout use?
About 679 tokens (SKILL.md is roughly 2.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Craft Experiment Readout?
Skills that share tags, products or a category with Craft Experiment Readout: Ab Testing (coreyhaines31/marketingskills, 54k stars), Analytics (Nexus-JPF/note-companion, 870 stars), Ad Test Designer (aaron-he-zhu/aaron-marketing-skills, 2.9k stars) and Ab Test Analyzer (irinabuht12-oss/marketing-skills, 4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Craft Experiment Readout?
amplitude (a GitHub organization) maintains it in amplitude/builder-skills, which has 160 GitHub stars. The repository holds 61 skills in this directory. The repository was last updated on July 24, 2026.
Source: amplitude/builder-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.