Gives you four ways to catch performance regressions before they ship: page metrics (Core Web Vitals, bundle sizes), API endpoint latency (p50/p95/p99), build times (HMR, tests, Docker), and before/after comparisons. The baseline/compare workflow is the real money feature. Run it before your PR, make changes, run it again, and get a table showing what got faster or slower. Saves baselines to .ecc/benchmarks/ so your whole team works from the same numbers. Pairs well with CI to block PRs that regress performance. If you've ever merged something that "felt fine" but tanked load times in prod, this catches it earlier.
npx -y skills add affaan-m/ecc --skill benchmark --agent claude-codeInstalls into .claude/skills of the current project.
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juliusbrussee/caveman
mattpocock/skills
obra/superpowers
forrestchang/andrej-karpathy-skills
vercel-labs/skills