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Install in OpenClaw
/install web-perf
Description
Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (FCP, LCP, TBT, CLS, 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.
Usage Guidance
Install only if you are comfortable adding a local Chrome DevTools MCP server. Prefer pinning chrome-devtools-mcp to a specific reviewed version, avoid auto-confirming installs where practical, and run the MCP server with the least local and browser access needed for the audit.
Capability Analysis
Type: OpenClaw Skill
Name: web-perf
Version: 1.0.0
The skill is classified as suspicious primarily due to the 'Phase 5: Codebase Analysis' section in `SKILL.md`. This section instructs the AI agent to 'Search for configuration files' (e.g., `webpack.config.js`, `package.json`). While this action is plausibly related to web performance analysis, it implicitly instructs the agent to access and read local files. If the agent possesses file system access capabilities, this constitutes a high-risk behavior, even without clear malicious intent for exfiltration or unauthorized modification. Additionally, the `SKILL.md` recommends the user configure their environment by running `npx -y chrome-devtools-mcp@latest`, which introduces a supply chain risk as `npx -y` downloads and executes the latest version of a package without explicit confirmation, though this is a user setup instruction, not an agent action.
Capability Assessment
Credentials
Browser instrumentation and network/page inspection are proportionate for performance auditing, but a local MCP server may have access to the user's browser context and local environment depending on how it is run.
Install Mechanism
The MCP setup block instructs users to configure a local command using npx with -y and chrome-devtools-mcp@latest, which can download and execute a changing third-party package after review.
Instruction Scope
The instructions are task-scoped and do not include prompt hijacking, memory writes, credential collection, destructive actions, or unrelated behavior.
Persistence & Privilege
The artifact does not install persistence or background services itself, but adding the MCP entry to user configuration creates a durable local tool integration until the user removes it.
Purpose & Capability
The skill's stated purpose is web performance auditing with Chrome DevTools MCP, and its runtime workflow stays focused on page navigation, performance traces, network analysis, accessibility snapshots, and optional codebase inspection.
How to Use
- Make sure OpenClaw is installed (local or Docker)
- Run the install command in chat:
/install web-perf - After installation, invoke the skill by name or use
/web-perf - Provide required inputs per the skill's parameter spec and get structured output
Version History
v1.0.0
Initial release of the web-perf skill – a web performance audit tool powered by Chrome DevTools MCP.
- Audits Core Web Vitals (FCP, LCP, TBT, CLS, Speed Index) and provides detailed breakdowns.
- Identifies render-blocking resources, network dependency chains, and caching issues.
- Spots high-level accessibility gaps with a snapshot tool.
- Offers workflow and tool usage checklist for step-by-step auditing.
- Includes clear output formatting and actionable, prioritized recommendations.
- Guides analysis of codebase optimizations when source code is available; otherwise audits third-party sites externally.
Metadata
Frequently Asked Questions
What is Web Perf?
Analyzes web performance using Chrome DevTools MCP. Measures Core Web Vitals (FCP, LCP, TBT, CLS, 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. It is an AI Agent Skill for Claude Code / OpenClaw, with 6732 downloads so far.
How do I install Web Perf?
Run "/install web-perf" in the OpenClaw or Claude Code chat to install it in one step — no extra setup required.
Is Web Perf free?
Yes, Web Perf is completely free (open-source). You can download, install and use it at no cost.
Which platforms does Web Perf support?
Web Perf is cross-platform and runs anywhere OpenClaw / Claude Code is available (cross-platform).
Who created Web Perf?
It is built and maintained by elithrar (@elithrar); the current version is v1.0.0.
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