seo-unlighthouse

Run Lighthouse against every URL on a site (up to a configurable cap) and aggregate the results. Useful when:

PageSpeed Insights' free quota (25k QPD) isn't enough for a large site.
You want offline / local CWV measurement (CI integration, restricted environments).
You need a quick site-wide regression check after a deploy.

Prerequisites

Run extensions/unlighthouse/install.sh (no API key needed).
Node 18+ on $PATH.

Routing

Command	Effect
`/seo unlighthouse <url>`	Mobile audit, up to 200 routes, JSON+HTML report in a temp dir
`/seo unlighthouse <url> --device desktop`	Desktop form factor
`/seo unlighthouse <url> --max-routes 50 --output-dir ./reports`	Cap + persist

All flags forward through "${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run unlighthouse_run.py, which handles url_safety pre-flight and subprocess timeout management.

Output handling

The wrapper reads ci-result.json from the Unlighthouse output dir, normalizes it (the default jsonSimple reporter writes a flat JSON array of per-route results; a tolerant fallback also accepts the jsonExpanded object shape), and returns:

route_count: number of routes actually audited
aggregate_scores: median score per Lighthouse category across all audited routes (performance, accessibility, best-practices, seo)
routes: the per-route breakdown (also on disk at <output_dir>/ci-result.json)

Route cap and per-page timeout are set via a generated unlighthouse.config.mjs passed with --config-file (the only CLI-documented way to set scanner.maxRoutes; unlighthouse-ci has no --max-routes flag). Use --page-timeout <seconds> to change the per-page Lighthouse task timeout (default 60s); this is separate from the overall --timeout subprocess guard (default 600s).

Cross-skill delegation

For single-URL field data (CrUX), use seo-google psi / seo-google crux.
For LCP subpart decomposition on slow pages, use the "${CLAUDE_PLUGIN_ROOT}/scripts/claude-seo" run lcp_subparts.py workflow (Phase C).

/seo-unlighthouse

SKILL.md