Menu
Performance baseline and regression detection -- page performance, API latency, build times, and before/after comparison.
Install with Codex or Claude Copy this prompt, paste it into Codex, Claude, or another assistant, and let it review the skill page and install it for you.
Based on SOC occupation classification
Regression testing strategies for AI-assisted development. Sandbox-mode API testing without database dependencies, automated bug-check workflows, and patterns to catch AI blind spots.
Clean Architecture patterns for Android and Kotlin Multiplatform projects -- module structure, dependency rules, UseCases, Repositories, and data layer patterns.
Turn a one-line objective into a step-by-step construction plan for multi-session, multi-agent engineering projects. Each step has a self-contained context brief so a fresh agent can execute it cold.
Automated visual testing and interaction verification -- smoke tests, interaction tests, visual regression, and accessibility audits using browser automation.
Bun as runtime, package manager, bundler, and test runner. When to choose Bun vs Node, migration notes, and Vercel support.
Post-deploy monitoring -- watches deployed URLs for regressions in HTTP status, console errors, performance, content, and API health.
| name | benchmark |
| description | Performance baseline and regression detection -- page performance, API latency, build times, and before/after comparison. |
| origin | ECC |
Measure and compare performance metrics to detect regressions.
Measures real browser metrics: LCP, CLS, INP, FCP, TTFB, total page weight, JS bundle size, CSS size, image weight, network request count.
Benchmarks API endpoints: hit each endpoint 100 times, measure p50/p95/p99 latency, track response size, test under 10 concurrent requests.
Measures development feedback loop: cold build time, HMR time, test suite duration, TypeScript check time, lint time, Docker build time.
/benchmark baseline # saves current metrics
# ... make changes ...
/benchmark compare # compares against baseline
Output:
| Metric | Before | After | Delta | Verdict |
|---|---|---|---|---|
| LCP | 1.2s | 1.4s | +200ms | WARN |
| Bundle | 180KB | 175KB | -5KB | BETTER |
| Build | 12s | 14s | +2s | WARN |
Stores baselines in .ecc/benchmarks/ as JSON. Git-tracked so the team shares baselines.
/benchmark compare on every PR/canary-watch for post-deploy monitoring/browser-qa for full pre-ship checklist