Good for pressure testing decisions before you commit to them. You feed it a plan or direction you're considering, and it comes back with potential failure modes, edge cases, and second-order effects you might not have thought through. Think of it as having someone play devil's advocate systematically rather than just nodding along. Most useful when the stakes are high or you're too close to something to see the holes. It won't make the decision for you, but it'll make sure you've actually thought it through instead of just running on confidence and momentum.
npx skills add https://github.com/alirezarezvani/claude-skills --skill stress-test