$ headless-seo-check http://127.0.0.1:4311 --urls /hreflang-good,/hreflang-drift,/hreflang-dead,/hreflang-drift-dead,/hreflang-html-only --plain
--- stdout+stderr ---
headless-seo-check: checking http://127.0.0.1:4311 …
headless-seo-check: 5 of 5 URLs selected, from --urls
run	http://127.0.0.1:4311	--urls	5	5
page	http://127.0.0.1:4311/hreflang-good	checked	200	static	324	17	0	0	-
page	http://127.0.0.1:4311/hreflang-drift	checked	200	static	324	17	0	1	-
finding	http://127.0.0.1:4311/hreflang-drift	error	hreflang-drift	the Link: header and the HTML advertise different URLs for 1 language
detail	http://127.0.0.1:4311/hreflang-drift	hreflang-drift	fr  header: http://127.0.0.1:4311/fr/hreflang-drift
detail	http://127.0.0.1:4311/hreflang-drift	hreflang-drift	fr  HTML:   http://127.0.0.1:4311/fr/slug-traduit
detail	http://127.0.0.1:4311/hreflang-drift	hreflang-drift	fr  the header target answers HTTP 200
page	http://127.0.0.1:4311/hreflang-dead	checked	200	static	327	17	0	0	-
page	http://127.0.0.1:4311/hreflang-drift-dead	checked	200	static	327	17	1	2	-
finding	http://127.0.0.1:4311/hreflang-drift-dead	error	hreflang-drift	the Link: header and the HTML advertise different URLs for 1 language
detail	http://127.0.0.1:4311/hreflang-drift-dead	hreflang-drift	fr  header: http://127.0.0.1:4311/fr/nexiste-pas
detail	http://127.0.0.1:4311/hreflang-drift-dead	hreflang-drift	fr  HTML:   http://127.0.0.1:4311/fr/slug-traduit
detail	http://127.0.0.1:4311/hreflang-drift-dead	hreflang-drift	fr  the header target does not exist (HTTP 404)
finding	http://127.0.0.1:4311/hreflang-drift-dead	error	hreflang-dead-target	1 hreflang target in the Link: header do not exist
detail	http://127.0.0.1:4311/hreflang-drift-dead	hreflang-dead-target	fr  http://127.0.0.1:4311/fr/nexiste-pas — does not exist (HTTP 404)
page	http://127.0.0.1:4311/hreflang-html-only	checked	200	static	325	17	1	0	-
summary	checked	5
summary	dynamic	0
summary	unclear	0
summary	noindex_header	0
summary	hreflang_drift	2
summary	hreflang_dead_target	1
summary	empty_html	0
summary	sitemap_errors	0
summary	unreachable	0
summary	blocking	3
summary	warnings	0
summary	interrupted	0
summary	exit_code	1
--- exit code: 1 ---