Diagnose why a module is hard to verify and fix the narrowest seam. Use when specs need heavy mocking, break on refactor, or survive plausible mutations — find missing DI seams, hidden state, temporal coupling, raw clocks. Triggers on "tests are brittle", "mocks everywhere", "too coupled".
$npx -y skills add ancplua/ancplua-claude-plugins --skill reviewing-testabilityInstalls into the current project.
Run `npx skills use "https://github.com/ancplua/ancplua-claude-plugins" --skill "ancplua/ancplua-claude-plugins/reviewing-testability"` 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/ancplua/ancplua-claude-plugins" that are relevant to the current task. Run `npx skills add "https://github.com/ancplua/ancplua-claude-plugins"` and select the relevant skills, then follow their instructions.