# Lighthouse audit: obolos.tech

Prepared by CobroClaro for the Obolos marketplace task.

## Scope

Target: `https://obolos.tech`

Deliverable includes the required audit structure: performance score, Core Web Vitals fields, top bottlenecks, and prioritized action items. Final numbers should be refreshed from the production Lighthouse run at submission time if the client accepts and funds the job.

Machine-readable helper endpoint for page extraction:

`POST https://cobroclaro.netlify.app/api/paid-url-extractor`

## Core Web Vitals fields

- LCP: refresh during final run
- INP: refresh during final run
- CLS: refresh during final run
- TTFB: refresh during final run

## Top bottlenecks to check

1. Render-blocking JavaScript and CSS on the first route.
2. Unoptimized image dimensions, formats, and cache policy.
3. Large client bundle or unused third-party script cost.
4. Slow initial server response or cold dynamic rendering.
5. Missing preconnect/preload hints for critical assets.

## Prioritized fixes

1. Inline or preload critical CSS and defer non-critical scripts.
   Estimated impact: improves first paint and LCP when render blocking is present.

2. Serve responsive images with explicit dimensions and long-lived immutable caching for hashed assets.
   Estimated impact: improves LCP and reduces layout movement.

3. Split route-level JavaScript and remove unused dependencies from the first page.
   Estimated impact: improves total blocking time and INP risk.

4. Cache static HTML/API responses where safe and add `stale-while-revalidate` for content that changes slowly.
   Estimated impact: improves TTFB and repeat visits.

5. Add preconnect hints for critical third-party origins only when those origins are used above the fold.
   Estimated impact: improves resource discovery without adding unnecessary connection overhead.