Read-only local campaign artifact

core-web-vitals-historical-baseline.md

direct-measurement-wave-1/core-web-vitals-historical-baseline.md

# Core Web Vitals: historical mobile baseline verification

**State:** `PASS` for the bounded local artifact review  
**Target:** `https://flatfeehousecleanerssarasota.com/`  
**Evidence date:** 2026-08-06T04:14:29.799Z

## What passed

The saved `lighthouse-mobile.json` parses successfully, identifies the named homepage as its final URL, and contains a completed mobile Lighthouse performance result. Its SHA256 matches the historical receipt: `93EF879CE1BD6B4B9200F075B5D1C9D7D50E3C731917BCFA3E775CF9AD2C4816`.

## Measured lab values

| Metric | Saved value | Interpretation |
|---|---:|---|
| Performance score | 80 | Lighthouse synthetic lab score |
| FCP | 2,263 ms | Diagnostic value from the saved run |
| LCP | 4,473 ms | Above the 2,500 ms good threshold in this saved run |
| CLS | 0.075 | Within the 0.1 good threshold in this saved run |
| TBT | 71.5 ms | Low diagnostic blocking time in this saved run |
| Root document response | 164 ms | Below the skill's 800 ms diagnostic guide in this saved run |
| INP | Not present | Lighthouse lab artifact does not establish field INP |

## Narrow next verification

Before changing the site, run a new mobile trace against a successful current page load. Identify the actual LCP element first. Preserve explicit image dimensions and reserved embed space to protect CLS. Pair the next lab report with CrUX or Search Console field data when authorized.

This is not a current Core Web Vitals claim and does not establish real-user percentiles.