Design statistically valid A/B tests and run a growth experimentation program — sample-size tables, hypothesis framework, ICE prioritization, velocity targets, and an experiment playbook template. Use when the user wants to test two versions, asks how long to run a test, mentions statistical significance, or wants a systematic experiment backlog.
$npx -y skills add mixard/fable-pack --skill ab-testingInstalls into the current project.
Run `npx skills use "https://github.com/mixard/fable-pack" --skill "mixard/fable-pack/ab-testing"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/mixard/fable-pack" that are relevant to the current task. Run `npx skills add "https://github.com/mixard/fable-pack"` and select the relevant skills, then follow their instructions.