To write thorough, isolated, idempotent tests — 80%+ coverage, external-only mocking, scenario-driven.
$npx -y skills add griddynamics/rosetta --skill testingInstalls into the current project.
Run `npx skills use "https://github.com/griddynamics/rosetta" --skill "griddynamics/rosetta/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/griddynamics/rosetta" that are relevant to the current task. Run `npx skills add "https://github.com/griddynamics/rosetta"` and select the relevant skills, then follow their instructions.