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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 this if you want an agent to audit web page performance and inspect the relevant web project configuration. Review or pin the Chrome DevTools MCP package before using the suggested `npx -y ...@latest` command in sensitive environments, and avoid running the skill in repositories or browser sessions you do not want analyzed.
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
Purpose & Capability
The stated purpose is web performance auditing with Chrome DevTools MCP, and the artifact's browser tracing, network request review, accessibility snapshot, and optional project configuration checks are aligned with that purpose.
Instruction Scope
The runtime instructions are bounded to auditing a target page and, when source access is available, inspecting web build configuration; there are no prompt overrides, hidden role changes, unrelated data access, mutation workflows, or exfiltration instructions.
Install Mechanism
The skill asks the user to configure a local MCP server with `npx -y chrome-devtools-mcp@latest`; this is disclosed and user-directed, but unpinned latest-package execution carries normal supply-chain risk.
Credentials
Reading package and bundler configuration files and using browser performance tooling are proportionate for a web performance audit, but users should run it only against repositories, sites, and browser sessions they intend to analyze.
Persistence & Privilege
The artifact contains no evidence of persistence, privilege escalation, background workers, credential harvesting, durable indexing, destructive actions, or automatic high-impact changes.
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 6497 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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