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Evidence record · captured 2026-10-10

Cloudflare Web Performance Audit

An evidence-led workflow for browser traces, Core Web Vitals, network waterfalls, accessibility snapshots, and codebase-level web performance findings.

Official publisherUnverifiedSource reviewedBehavior not tested
Source review

Editorial assessment

This is a source-only assessment. It does not claim runtime or security testing.

What it does

The workflow moves from a cold-load trace through metric-specific evidence, request analysis, accessibility inspection, and framework-aware source review, with a reporting format that demands measured impact.

Best for

  • Diagnosing a slow page with browser evidence
  • Prioritizing Core Web Vitals and request-chain fixes
  • Connecting runtime findings to a web codebase

Strengths in the source

  • Requires verification before recommending removal or optimization.
  • Uses explicit performance thresholds and insists that estimated savings drive priority.
  • Separates runtime, network, accessibility, and build-tool analysis into repeatable phases.

Limitations

  • Useful metric claims depend on trace-capable browser tools and a representative environment.
  • An accessibility-tree snapshot is not a full assistive-technology or manual usability audit.
  • Thresholds can age, which is why the skill requires fresh official sources.

When not to use it

  • A purely functional browser test with no performance question
  • A performance claim when the target page cannot be measured

Reviewed by Retenta editorial on 2026-10-10; scope: source only.

Files included in this review
  • skills/web-perf/SKILL.md
  • README.md
  • LICENSE

Evidence and boundaries

Execution · not tested

Retenta reviewed the pinned source but did not install or execute this skill.

Security · not tested

No sandbox run, dependency audit, or independent security assessment is claimed.

Pinned publisher source
skills/web-perf/SKILL.md
Revision
c430dd965cea3a8faf0ef035e3b3d73b38518081
License evidence
Apache-2.0The pinned repository root LICENSE is the Apache License, Version 2.0.
Last source change
2026-09-05
Independent verification
The source is controlled by Cloudflare; Retenta has not independently verified its runtime behavior or security.
Upstream repository
Open publisher repository

Compatibility

Agent Skills clients

documented

Cloudflare documents installation paths for Codex, Claude Code, VS Code/Copilot, Cursor, and other Agent Skills clients.

Requirements and access

  • A reachable page or local application
  • Browser performance tooling for runtime measurements
  • Source access for the optional codebase phase

Referenced tools

Chrome DevTools MCPPerformance traceNetwork inspectionAccessibility snapshot

Install from the source

Cloudflare documents this command for agents that support the Agent Skills standard; it installs the repository collection, not only this record.

View the SKILL.md at its source Verify the publisher's install documentation

More Web and frontend skills →

Publisher-documented Agent Skills install

npx skills add https://github.com/cloudflare/skills

Thyme RAG Capsules

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Create durable agent memoryUnderstand the evidence labels