Manifest position 554 · CrUX rank bucket 1000

https://service.smt.docomo.ne.jp

Coverage complete

Coverage-complete audit of the public root. The URL itself returned a rendered HTTP 404, so that error template is the only same-origin archetype available from the requested entry point.

Attempts

1 / 3

Judged checks

58 / 58

Blocked

Not run

This report has no published overall score. Blocked and not-run checks are not passes. A coverage-complete report means every check has a judged outcome; it does not mean every check passed.

All 58 atomic check outcomes

Principle / check	Status	Confidence	Evidence or reason
respect-user-preferences `respects-color-scheme`	issues	high	Dark emulation leaves the body white and color-scheme normal. F-002 medium: The page ignores the user’s dark color-scheme preference.
respect-user-preferences `respects-reduced-motion`	pass	high	Reduced-motion emulation matched and document.getAnimations() returned zero animations.
respect-user-preferences `respects-contrast`	pass	high	Forced-colors/high-contrast screenshot keeps all error text and the recovery action visible.
implement-natural-interactions `view-transitions`	pass	high	The document has no custom state swap or same-site route transition; its sole cross-origin navigation uses the platform’s native link behavior rather than a jarring scripted replacement.
implement-natural-interactions `scroll-driven-animations`	not-applicable	high	The short static error document has no scroll-linked motion or scrollytelling surface.
implement-natural-interactions `physical-gestures`	not-applicable	high	The document exposes no gesture-driven component, carousel, swipe action, or disclosure.
provide-guided-navigation `scroll-state-aware-chrome`	not-applicable	high	The single short error state has no scroll-dependent chrome or multi-section navigation.
provide-guided-navigation `anchored-positioning`	not-applicable	high	No tooltip, popover, menu, or other anchored overlay exists.
provide-guided-navigation `directs-attention`	pass	high	The compact failure state has one underlined, button-shaped recovery action immediately after the explanation, with no competing controls or ambiguous focus destination.
maximize-content-reduce-noise `no-intrusive-interruptions`	pass	high	Initial desktop and mobile screenshots show no popup, banner, consent wall, or overlay obscuring content.
maximize-content-reduce-noise `semantic-dismissible-primitives`	not-applicable	high	No overlay, disclosure, picker, or rich control exists on this error document.
maximize-content-reduce-noise `reduced-chrome`	pass	high	The viewport contains only a compact error heading, explanation, one recovery action, and footer; no competing application chrome.
adapt-to-the-form-factor `responsive-no-horizontal-scroll`	pass	high	At 360×800, layout reports scrollWidth=clientWidth=360, horizontalOverflowPx=0, CLS=0, and viewport meta present.
adapt-to-the-form-factor `component-level-responsiveness`	not-applicable	high	The page has no component reused in differently sized containers; a container-query adaptation cannot be meaningfully exercised.
adapt-to-the-form-factor `input-modality-aware`	issues	high	Keyboard focus is visible, but the only link is about 127×24px, too short for a robust touch target. F-003 high: The viewport blocks zoom and the only action has a 24px-high target.
support-core-task-success `clear-purpose-and-primary-action`	issues	high	The root communicates only “Error” and cannot explain or expose the requested service; its sole action leaves for another origin. F-001 critical: The requested service root is a 404 error page, so its primary task cannot be completed.
support-core-task-success `primary-flow-completion`	issues	high	The main document returns HTTP 404, so no service journey is available to complete. F-001 critical: The requested service root is a 404 error page, so its primary task cannot be completed.
support-core-task-success `clear-system-state-and-recovery`	pass	high	The failure state is explicit in Japanese and supplies a clearly labelled return action; context is not hidden behind a spinner.
be-fast-and-stable `good-core-web-vitals`	pass	high	Trace measured FCP/LCP 1.755s, TBT 0ms; layout measured CLS 0 and no long tasks. The static page has no eligible INP interaction workload.
be-fast-and-stable `visual-stability`	pass	high	Mobile layout observer measured CLS 0 with no shift entries; all visible content stayed stable.
be-fast-and-stable `efficient-main-thread`	pass	high	Trace reports zero long tasks and 0ms total blocking time; the DOM contains no scripts.
be-fast-and-stable `efficient-resource-delivery`	issues	high	For 9.6KB total, load end is 2.732s; document takes 1.421s, three assets lack cache headers, a favicon redirects, and CSS is parser-blocking. F-004 low: A tiny error page has avoidable delivery latency and cache misses.
be-fast-and-stable `trim-unused-and-duplicate-code`	pass	high	HAR transfers only 9.6KB across six first-party requests and the DOM has no JavaScript bundles or third-party code.
be-inclusive `names-roles-labels`	pass	high	The only interactive element is a native anchor with visible text; there are no form fields, images, canvas, or unnamed custom controls.
be-inclusive `sufficient-contrast`	pass	high	Normal and forced-color screenshots show black text/actions against white/system surfaces with visible borders and underlines.
be-inclusive `structure-and-focus`	issues	high	Focus has a visible browser outline and headings are ordered, but main=0 leaves primary content without a main landmark. F-005 low: The document has no main landmark.
be-inclusive `legible-text`	pass	high	Desktop/mobile screenshots show unclipped Japanese text with short lines and no overlap or horizontal scrolling.
be-inclusive `zoom-reflow-targets-and-media`	issues	high	Viewport explicitly sets maximum-scale=1.0,user-scalable=no and the sole target is 24px high. F-003 high: The viewport blocks zoom and the only action has a 24px-high target.
follow-best-practices `no-console-errors`	pass	high	Rendered DOM contains no scripts, HAR shows all subresources successful, and no executable application code exists to throw during load.
follow-best-practices `sound-document-and-assets`	pass	high	Document has HTML doctype, UTF-8 charset, valid heading text, and no img elements with sizing/aspect-ratio defects.
follow-best-practices `browser-platform-hygiene`	pass	high	No scripts, permission calls, forms, paste handlers, or application libraries are present; the static markup uses standard elements.
be-discoverable `title-and-description`	issues	high	Title is only エラー and meta description is absent. F-006 high: The public root has generic, incomplete search metadata.
be-discoverable `crawlable-and-mobile-friendly`	issues	high	Viewport exists and link text is descriptive, but user scaling is disabled and the sole crawlable destination is insecure HTTP. F-003 high: The viewport blocks zoom and the only action has a 24px-high target. F-007 high: Indexing and navigation signals point to a broken or insecure destination.
be-discoverable `canonical-and-indexing-signals`	issues	high	Main document is HTTP 404 with no canonical; raw robots/sitemap fetch was blocked by unsafe legacy TLS renegotiation. F-007 high: Indexing and navigation signals point to a broken or insecure destination.
be-discoverable `structured-and-shareable-metadata`	not-applicable	high	This is an error state, not an article, product, event, place, organization profile, or other rich entity requiring structured/share metadata.
be-private-and-secure `secure-transport-and-headers`	issues	high	HTTPS is used, but CSP, HSTS and nosniff are absent and the recovery URL downgrades to HTTP. F-008 high: The response omits baseline browser security policies.
be-private-and-secure `data-minimisation-and-third-parties`	pass	high	Trackers probe finds zero third-party origins/known trackers; cookies finds zero cookies; secrets scan finds no exposed credentials.
be-private-and-secure `in-context-permissions-and-modern-auth`	not-applicable	high	No permission request or authentication surface exists on the error document.
be-private-and-secure `defensive-browser-policies`	issues	high	No clickjacking protection, Referrer-Policy, Permissions-Policy, CSP/frame-ancestors, or HSTS is present. F-008 high: The response omits baseline browser security policies.
be-resilient `progressive-enhancement`	pass	high	The error content is server-rendered HTML with no scripts or empty SPA mount; browser rendering does not depend on JavaScript.
be-resilient `resilient-runtime-behaviour`	not-applicable	high	No overlay, menu, asynchronous dependency, client state, or background runtime exists to exercise.
be-resilient `offline-and-installable`	not-applicable	high	This public error document is not an app-like surface, so installability and an offline app shell are not proportionate requirements.
be-resilient `network-and-http-failure-states`	pass	high	The observed 404 renders an explicit Japanese error, likely causes, and a labelled recovery action rather than a blank shell or spinner.
be-internationalised `lang-dir-and-logical-properties`	issues	high	html lang=ja is correct, but CSS uses physical left/right properties and no logical inline/block properties. F-009 low: Styles are tied to physical directions rather than writing modes.
be-internationalised `locale-aware-data`	not-applicable	high	The error document contains no date, time, number, currency, duration, calendar, or user-entered locale data to format.
be-internationalised `time-zone-correctness`	not-applicable	high	The error document contains no scheduled event, timestamp, recurring interval, or time-zone-sensitive concept.
be-trustworthy `no-dark-patterns`	pass	high	The page contains one plainly labelled recovery link and no consent, pricing, ad, continuity, nagging, or disguised-control surface.
be-trustworthy `humane-error-handling`	not-applicable	high	There is no form or user input to validate. The HTTP error-state recovery itself is assessed under resilience/core-task checks.
be-trustworthy `trustworthy-input-assistance`	not-applicable	high	No input, sign-in, address, payment, or account field exists.
be-trustworthy `safe-commercial-and-account-flows`	not-applicable	high	No checkout, subscription, consent, authentication, or account-management flow is exposed.
be-sustainable `optimised-assets`	pass	high	HAR transfers only 1.3KB of two decorative images and 9.6KB total; image audit finds no img sizing, srcset, lazy-load, or format waste.
be-sustainable `no-wasteful-work`	pass	high	No scripts, background requests, timers, media, or third-party activity exist; trace reports no long tasks.
be-sustainable `third-party-and-media-budget`	pass	high	HAR and tracker probes find zero third-party bytes/origins and no audio, video, fonts, autoplay, or animation.
be-agent-ready `structured-agent-capabilities`	not-applicable	high	The observed URL is only a public error state with no user capability or form to expose safely to an agent.
be-agent-ready `on-device-inference`	not-applicable	high	The minimal static error state has no inference/summarisation task where an on-device model would improve the experience.
be-memory-efficient `no-leak-under-repeated-interaction`	not-applicable	high	The static error page has no modal, route state, feed, editor, or other representative interaction to repeat without fabricating a test.
be-memory-efficient `bounded-footprint`	pass	high	Heap snapshot reports 27,336 nodes, 107,651 edges and 853,204 self-size bytes, proportionate to this tiny static page.
be-memory-efficient `no-detached-dom-or-unbounded-listeners`	pass	high	The page has no application scripts or repeated client lifecycle; the heap summary shows a bounded single static state with no app-created listener/timer surface.

Provenance

Canonical report: results/atomic/reports/0554-service_smt_docomo_ne_jp.json
Report SHA-256: 0db043159fa85f2b7733210dd5429c38b01a2d7db4471010ff0bf8a1654cab5e
Local retained report: runs/2026-07-17T17-27-24-856Z/atomic-reports/service_smt_docomo_ne_jp/2026-07-21T13-18-59-730Z/report.json
Local evidence root: runs/2026-07-17T17-27-24-856Z/atomic-reports/service_smt_docomo_ne_jp/2026-07-21T13-18-59-730Z
Catalog SHA-256: sha256:78ccfdb2d483f4c57d9dafed80fd86c6265585a56457c8dcfddc254b80fb44d7

Raw screenshots, HARs, traces, heaps, and other browser artifacts are retained at the local evidence root and intentionally are not committed. Artifact paths in the canonical report are relative to that root.