seo-performance

Diagnose web performance issues by measuring CWV and Lighthouse signals.

Updated Jun 6, 2026
One-click install
npx skills add https://github.com/dereknguyen269/Codex-SEO --skill seo-performance-dereknguyen269
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: seo-performance
Source: https://github.com/dereknguyen269/Codex-SEO/tree/main/skills/seo-performance
Command: npx skills add https://github.com/dereknguyen269/Codex-SEO --skill seo-performance-dereknguyen269

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes scripts (resource) and references (resource) components.

What problem does it solve?

Diagnoses and quantifies performance issues in web audits by measuring Core Web Vitals (CWV) and Lighthouse signals, producing deterministic report artifacts for validation and sharing.

Core Features & Use Cases

  • CWV & Lighthouse telemetry: Collects real-user and lab performance data (LCP, INP, CLS) and Lighthouse scores to guide optimization.
  • Deterministic artifacts: Generates PERFORMANCE-AUDIT-REPORT.md and SUMMARY.json to ensure audit repeatability.
  • Use Case: When evaluating a client site, run the full audit sub-track to pinpoint regressions and produce a reproducible performance bundle.

Quick Start

Run the seo-performance skill on a target URL to generate the initial deterministic performance report.

Frequently Asked Questions about seo-performance

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I automate Core Web Vitals and Lighthouse audits for my client websites?

Automate Core Web Vitals and Lighthouse audits by running deterministic scripts against a target URL to measure LCP, INP, and CLS signals, yielding reproducible performance report artifacts. It applies to both full-site and page-level audits across client websites.

What is the best way to generate repeatable performance audit reports for SEO validation?

The best way to generate repeatable performance audit reports is using deterministic scripts that cache shared data and output standardized artifacts like PERFORMANCE-AUDIT-REPORT.md and SUMMARY.json, ensuring audit repeatability and validation across runs.

Can I run a full-site performance audit with just a URL and timeout configuration?

Yes, you can run a full-site performance audit using a URL and timeout as inputs. The deterministic scripts handle end-to-end performance measurement, collecting real-user and lab data to produce a comprehensive performance bundle.

How does Core Web Vitals scoring work when diagnosing web performance regressions?

Core Web Vitals scoring works by measuring telemetry signals like LCP, INP, and CLS alongside Lighthouse scores to quantify and diagnose performance regressions, guiding optimization efforts for the audited web pages.

What limitations should I expect when using Lighthouse signals for web performance audits?

When using Lighthouse signals for web performance audits, expect limitations around input configurations like URL and timeout constraints, though the skill mitigates variability by caching shared data and enforcing deterministic script execution for consistent outputs.

Does the seo-performance skill support exporting performance audit data to JSON?

Yes, the performance audit skill supports exporting data to JSON by generating a SUMMARY.json file alongside a PERFORMANCE-AUDIT-REPORT.md document, providing structured data for downstream analysis and sharing.