Deliver a Core Web Vitals audit and remediation plan for [Domain] focusing on priority templates tied to [ProductLine] and [PrimaryMarket]. Use [FieldDataSource] (field data) and [LabTool] (lab tests) to baseline LCP, CLS, INP, and TTFB. Map issues to render path (TTFB, resource loading, layout shift triggers, long tasks). Provide code-level recommendations compatible with [TechStack] and constraints set by [OwnerRole].
Output format:
Executive Summary of risk to rankings and revenue with an ROI estimate over [Timeframe].
Vitals Dashboard Table (Template, Device, LCP, CLS, INP, TTFB, Issue Cluster, Fix, Effort, Owner, Target, ETA).
Waterfall Evidence links and screenshots per issue cluster.
Fix Playbooks (e.g., critical CSS, server-side rendering, image optimisation policy, third-party script governance).
Forecast Model quantifying sessions uplift per 0.1s LCP improvement using [AttributionModel].