Manifest position 506 · CrUX rank bucket 1000
https://sp.pf.mbga.jp
Coverage complete
Complete atomic audit of the target missing-page response plus its linked recovery destination. The target exposes one static page archetype; broader sp.mbga.jp content is outside host scope.
Attempts
1 / 3
Judged checks
58 / 58
Blocked
0
Not run
0
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-preferencesrespects-color-scheme | issues | high | Dark-preference capture is pixel-identical to light: white surface and black text; CSS probe finds no color-scheme or prefers-color-scheme rule. F-DARK medium: The page ignores the user dark-theme preference |
respect-user-preferencesrespects-reduced-motion | pass | high | Computed-style probe found zero active animations, so no non-essential motion remains under reduced-motion. |
respect-user-preferencesrespects-contrast | pass | high | High-contrast capture keeps the error message, recovery link, and footer controls visible. |
implement-natural-interactionsview-transitions | not-applicable | high | This static error document has no same-document or route state transition to animate. |
implement-natural-interactionsscroll-driven-animations | not-applicable | high | The complete document is 144px tall and has no scroll-linked effect. |
implement-natural-interactionsphysical-gestures | pass | high | The page uses native anchors for every interaction and adds only bounded touchstart/touchend pressed-state feedback, with no custom pointermove or gesture handling that fights the platform. |
provide-guided-navigationscroll-state-aware-chrome | not-applicable | high | The complete document fits within one viewport and has no meaningful scroll state. |
provide-guided-navigationanchored-positioning | not-applicable | high | No tooltip, popover, or menu overlay exists on this error document. |
provide-guided-navigationdirects-attention | pass | high | The first viewport states the missing-page condition and places a descriptive Mobage home recovery link immediately below it. |
maximize-content-reduce-noiseno-intrusive-interruptions | pass | high | Load screenshots show no popup, banner, consent wall, or obscuring overlay. |
maximize-content-reduce-noisesemantic-dismissible-primitives | not-applicable | high | No overlay, disclosure, picker, or rich control exists on this error document. |
maximize-content-reduce-noisereduced-chrome | pass | high | The first viewport contains only two short error paragraphs and a compact four-item navigation strip. |
adapt-to-the-form-factorresponsive-no-horizontal-scroll | pass | high | Layout at 360x800 reports scrollWidth 360, clientWidth 360, horizontalOverflowPx 0, and a viewport meta element. |
adapt-to-the-form-factorcomponent-level-responsiveness | not-applicable | high | The one-off error message and four-link footer are not reused components in differently sized containers. |
adapt-to-the-form-factorinput-modality-aware | issues | high | The primary recovery anchor measures 184.4 by 17px, below the 24px minimum target height, although footer targets are 60 by 48px and keyboard focus is visible. F-TARGET low: The primary recovery link has a short touch target |
support-core-task-successclear-purpose-and-primary-action | pass | high | The first line says the page does not exist and the next line offers a clearly labelled move-to-Mobage-top action. |
support-core-task-successprimary-flow-completion | pass | high | Following the recovery destination loads the Mobage home page with news and game navigation. |
support-core-task-successclear-system-state-and-recovery | pass | high | The missing state is visible as text and provides both a direct home recovery link and four navigation alternatives. |
be-fast-and-stablegood-core-web-vitals | pass | high | Trace measured LCP 1494.61ms, CLS 0, and TBT 0ms; Lighthouse measured LCP 2.2s, CLS 0, and TBT 0ms. |
be-fast-and-stablevisual-stability | pass | high | The layout observer recorded CLS 0 with no layout shifts. |
be-fast-and-stableefficient-main-thread | pass | high | Trace and layout evidence recorded no long tasks and total blocking time of 0ms. |
be-fast-and-stableefficient-resource-delivery | issues | high | HAR identifies the parser-inserted base.css as VeryHigh-priority render-blocking; Lighthouse estimates 730ms savings and the document TTFB was 734ms. F-RESOURCE low: A tiny error page waits on a render-blocking stylesheet |
be-fast-and-stabletrim-unused-and-duplicate-code | pass | high | HAR records only 4 requests and 43,435 transferred bytes with no external JavaScript; Lighthouse best-practices scored 1.0. |
be-inclusivenames-roles-labels | pass | high | All five interactive elements are native anchors with visible names; there are no images or form controls requiring additional alternatives. |
be-inclusivesufficient-contrast | pass | high | Lighthouse reported no color-contrast failure, and standard/high-contrast screenshots keep text and controls legible. |
be-inclusivestructure-and-focus | issues | high | DOM has no heading and no main, nav, header, or footer landmark; Lighthouse fails landmark-one-main. F-STRUCTURE medium: The error page has no semantic structure |
be-inclusivelegible-text | pass | high | Mobile and desktop captures show unclipped Japanese text with adequate whitespace and no cramped wrapping. |
be-inclusivezoom-reflow-targets-and-media | issues | high | Viewport declares maximum-scale=1.0 and user-scalable=no; Lighthouse fails its zoom accessibility audit. F-ZOOM medium: The viewport prevents user zoom |
follow-best-practicesno-console-errors | pass | high | Lighthouse best-practices scored 1.0 and reported no browser error audit failure. |
follow-best-practicessound-document-and-assets | pass | high | DOM probe confirms HTML doctype and UTF-8 charset; there are no img elements with sizing or aspect-ratio defects. |
follow-best-practicesbrowser-platform-hygiene | pass | high | Lighthouse best-practices scored 1.0; the probe found no form paste handlers and both permission states remained prompt rather than being requested. |
be-discoverabletitle-and-description | issues | high | Title is only モバゲー, which does not identify the missing-page state, and meta description is absent; Lighthouse SEO score is 0.82. F-META medium: The title and description do not describe the missing page |
be-discoverablecrawlable-and-mobile-friendly | issues | high | The viewport disables zoom and /robots.txt returns the same HTML missing-page body; Lighthouse reports robots.txt invalid with 58 errors. F-CRAWL medium: Robots and mobile-friendly signals are malformed |
be-discoverablecanonical-and-indexing-signals | issues | high | A nonexistent root, /robots.txt, and /sitemap.xml all return HTTP 200 HTML; the page has no canonical or robots directive, creating soft-404 and indexing ambiguity. F-INDEX high: Missing resources return HTTP 200 and lack indexing signals |
be-discoverablestructured-and-shareable-metadata | not-applicable | high | This is a generic missing-page response, not an article, product, event, organization, or other rich entity. |
be-private-and-securesecure-transport-and-headers | issues | high | The document uses HTTPS and sets no cookies, but headers evidence finds no CSP, HSTS, or X-Content-Type-Options. F-HEADERS medium: Core transport security headers are absent |
be-private-and-securedata-minimisation-and-third-parties | pass | high | Network evidence found 4 requests, no cookies, no known trackers, no exposed secrets, and only one related static-asset origin. |
be-private-and-securein-context-permissions-and-modern-auth | not-applicable | high | This error document has no authentication flow and requests no browser permission. |
be-private-and-securedefensive-browser-policies | issues | high | Headers evidence finds no frame-ancestors/X-Frame-Options, Referrer-Policy, or Permissions-Policy. F-POLICIES medium: Browser defensive policies are not configured |
be-resilientprogressive-enhancement | pass | high | Raw server HTML contains the full visible error text and links; the page is not a JavaScript shell. |
be-resilientresilient-runtime-behaviour | pass | high | The page has no overlays or asynchronous dependencies; all recovery links have real href values and the tested home destination loaded. |
be-resilientoffline-and-installable | not-applicable | high | This small cross-site recovery document is not an app-like surface for which installation is a meaningful task. |
be-resilientnetwork-and-http-failure-states | pass | high | The missing-page state is rendered as readable text with a direct home link and four alternate navigation choices. |
be-internationalisedlang-dir-and-logical-properties | issues | high | The Japanese document has an empty html lang attribute and no dir; Lighthouse fails html-has-lang. F-LANG medium: The Japanese document does not declare its language |
be-internationalisedlocale-aware-data | not-applicable | high | The page renders no date, number, currency, duration, or calendar data. |
be-internationalisedtime-zone-correctness | not-applicable | high | The page contains no time or event data. |
be-trustworthyno-dark-patterns | pass | high | Screenshots and DOM show no consent wall, upsell, forced continuity, disguised action, or deceptive default. |
be-trustworthyhumane-error-handling | not-applicable | high | There is no user-input form on this error document. |
be-trustworthytrustworthy-input-assistance | not-applicable | high | There are no input fields on this error document. |
be-trustworthysafe-commercial-and-account-flows | not-applicable | high | No checkout, subscription, consent, authentication, or account-management flow is present. |
be-sustainableoptimised-assets | pass | high | The whole page transfers 43,435 bytes; its only visual asset is a shared 37,014-byte navigation sprite. |
be-sustainableno-wasteful-work | pass | high | HAR records four requests and no external JavaScript, trackers, autoplay media, or background fetching. |
be-sustainablethird-party-and-media-budget | pass | high | There is no audio, video, animation, font, tracker, or third-party script; the related asset host contributes a small CSS file and sprite. |
be-agent-readystructured-agent-capabilities | not-applicable | high | This generic missing-page response has no agent-facing task or capability to expose. |
be-agent-readyon-device-inference | not-applicable | high | This short static error response has no inference use case. |
be-memory-efficientno-leak-under-repeated-interaction | pass | high | After ten touchstart/touchend cycles across each footer item, heap self size differed by only 1,052 bytes and node count by 90 between isolated captures, with no unbounded signal. |
be-memory-efficientbounded-footprint | pass | high | Baseline heap is proportionate for the page: 29,158 nodes in the V8 snapshot graph and 936,147 bytes total self size. |
be-memory-efficientno-detached-dom-or-unbounded-listeners | pass | high | Ten repeated footer touch cycles produced only a 0.11% self-size difference and 0.31% node-count difference; no accumulating timer or detached-DOM behavior was observed. |
Provenance
Canonical report: results/atomic/reports/0506-sp_pf_mbga_jp.json
Report SHA-256: 451c659f01c037e1bb55bc3b6d03e015cd20482f28223428e97de4ce3e6f8813
Local retained report: runs/2026-07-17T17-27-24-856Z/atomic-reports/sp_pf_mbga_jp/2026-07-21T06-26-14-738Z/report.json
Local evidence root: runs/2026-07-17T17-27-24-856Z/atomic-reports/sp_pf_mbga_jp/2026-07-21T06-26-14-738Z
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.