Web Perf
Skill ActiveAnalyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (LCP, INP, CLS) and supplementary metrics (FCP, TBT, Speed Index), identifies render-blocking resources, network dependency chains, layout shifts, caching issues, and accessibility gaps. Use when asked to audit, profile, debug, or optimize page load performance, Lighthouse scores, or site speed. Biases towards retrieval from current documentation over pre-trained knowledge.
To provide in-depth analysis and actionable recommendations for optimizing web page performance by leveraging Chrome DevTools MCP capabilities.
Features
- Measures Core Web Vitals (LCP, INP, CLS)
- Analyzes render-blocking resources and network dependency chains
- Identifies layout shifts, caching issues, and accessibility gaps
- Provides detailed performance trace analysis
- Offers codebase analysis for optimization opportunities
Use Cases
- When asked to audit page load performance.
- When asked to debug slow website loading.
- When asked to optimize Lighthouse scores or site speed.
- When needing to profile web application performance.
Non-Goals
- Performing actual code refactoring or asset optimization.
- Providing real-time performance monitoring over extended periods.
- Auditing backend server performance unrelated to frontend rendering.
Documentation
- info:Configuration & parameter referenceWhile many parameters are documented in the workflow, some tool calls within the workflow (e.g., `performance_analyze_insight`) reference insight names that might vary, and explicit defaults for all parameters are not always clear.
Versioning
- warning:Release ManagementNo explicit versioning is declared in the SKILL.md frontmatter or via GitHub releases, and installation instructions reference 'latest', making it difficult to pin a specific version.
Code Execution
- info:Error HandlingThe SKILL.md mentions troubleshooting steps for trace failures, but detailed error handling for tool calls (e.g., structured error fields like 'code', 'retryable', 'hint') is not explicitly documented.
Errors
- info:Actionable error messagesThe SKILL.md provides basic troubleshooting for trace failures, but doesn't detail specific error messages, root causes, or remediation steps for all potential tool call failures.
Practical Utility
- info:Edge casesThe SKILL.md includes a troubleshooting section for trace failures but does not explicitly list other potential failure modes (e.g., invalid URLs, rate limits) with corresponding recovery steps.
Safety
- info:Halt on unexpected stateThe SKILL.md provides troubleshooting for trace failures, but does not explicitly state a policy to halt and report on unexpected pre-states like a dirty working tree or invalid initial page load before proceeding.
Installation
First, add the marketplace
/plugin marketplace add cloudflare/skills/plugin install skills@cloudflareQuality Score
Trust Signals
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