Summary
Runs browser-based performance measurements against your live app, capturing Core Web Vitals (LCP, INP, CLS) plus load metrics, resource optimization, and bundle analysis. You get actual Performance API data, not static analysis. It's built around Google's 2024 thresholds and compares your numbers against HTTP Archive benchmarks. Best used before launches or when pages feel slow but you're not sure why. The five-phase approach is thorough, maybe overkill for a quick check, but if you need to justify performance work to stakeholders or catch what Lighthouse misses in local dev, it delivers the evidence.
Install to Claude Code
npx -y skills add shiplightai/agent-skills --skill performance-review --agent claude-codeInstalls into .claude/skills of the current project.
Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →
Agent, run crypto. Access onchain data & trade routes via 1inch.
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Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →
Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →
Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →
belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →Files
SKILL.md
Select a file.
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Plug Mailtrap into your AI workflow and let it handle the email.
Connect Mailtrap MCP →Agent, run crypto. Access onchain data & trade routes via 1inch.
Install now →Make coding agent sessions - Searchable, Shareable, Vendor-neutral & Scored.
Try For Free →Your agent targets a perfect 10 Code Health score. Deterministic. Every commit.
Try For Free →Integrate web data into your AI product. One API to scrape website & brand data.
Get API Key Now →belt cli automatically finds the best tools and skills for your agent. image, video, music, tts...
one prompt install →First SeenJun 3, 2026
