Add Performance skills

Is your feature request related to a problem? Please describe.

Currently, performance analysis via LLMs can be inconsistent. When a model is asked to measure performance, it often generates code on the fly, leading to:

1. Non-deterministic results: Different code for the same metric (e.g., LCP or CLS).
2. High token consumption: Generating and sending large blocks of JavaScript via Runtime.evaluate.
3. Hallucinations: Inaccurate ways of accessing the Performance API or observing entries.

Following the pattern of Addy Osmani's web-quality-skills, I propose a dedicated performance skill set for this MCP.

Describe the solution you'd like

The approach uses curated scripts instead of raw code generation:

• Deterministic Output: The model calls a skill (e.g., get_core_web_vitals) which executes a known, reliable script.
• Token Optimization: Only the results are passed back to the model, saving the cost of generating the code itself.
• CDP Integration: Leveraging Runtime.evaluate to execute these snippets and return structured JSON.

User Stories / Examples

Scenario 1: General performance audit

• User Prompt: "Analyze the performance of the current page."
• MCP Action: The model calls the performance meta-skill, which triggers core-web-vitals and loading.
• Result: The model receives a structured JSON with precise metrics and provides a grounded recommendation.

Scenario 2: Debugging interactions

• User Prompt: "Why is this page feeling laggy when I click buttons?"
• MCP Action: The model calls performance:interaction to check for Long Animation Frames or high INP.

Describe alternatives you've considered

.

Additional context

I have already migrated these snippets to a skill-based architecture in my project. I believe adapting and optimizing these for the Chrome DevTools MCP would significantly enhance its capabilities for web performance engineers.

I'm happy to provide a PR with the initial folder structure and the first set of core scripts if the maintainers agree with this direction.