Core Web Vitals (core-web-vitals)

Summary

LCP, CLS, FCP, TTFB via Performance Observer in a real browser session.

Classification

• Category: PERFORMANCE
• Plugin id: core-web-vitals
• Version: 1.1.1
• Target types: WEBSITE, WEBSHOP
• Weight class: MEDIUM
• Risk level: not set on plugin object
• Browser required: Yes (Playwright)
• Tier / group: Tier 2 — Browser (Playwright)

Schedule

• scheduleHints: { defaultInterval: '0 */6 * * *', priority: 7 }
• Prerequisites: None declared on this plugin.

Configurable inputs

Public keys are derived from inputSchema: z.object({ ... }) (underscore-prefixed keys are runtime-only and omitted here).

Field	Notes
timeout	Zod field in inputSchema — see source for defaults, min/max, and .describe().
lcpGood	Zod field in inputSchema — see source for defaults, min/max, and .describe().
lcpPoor	Zod field in inputSchema — see source for defaults, min/max, and .describe().
clsGood	Zod field in inputSchema — see source for defaults, min/max, and .describe().
clsPoor	Zod field in inputSchema — see source for defaults, min/max, and .describe().
inpGood	Zod field in inputSchema — see source for defaults, min/max, and .describe().
inpPoor	Zod field in inputSchema — see source for defaults, min/max, and .describe().

Runtime / injected config

• _priorThrottleHint / throttle-related hints may be passed between runs.

What it does

• Runs as part of the worker test execution pipeline; results become Run rows and may create Finding records.
• LCP, CLS, FCP, TTFB via Performance Observer in a real browser session.
• For finding titles, metrics, and artifacts specific to this plugin, refer to the implementation linked below.

Source

packages/test-plugins/src/plugins/core-web-vitals.ts