{ "url": "https://sp.mbga.jp", "auditedAt": "2026-07-19T01:16:33.738Z", "mode": "report", "status": "completed", "statusDetail": "Coverage-complete model audit across five representative public paths. Authenticated account, gameplay, checkout/payment and post-login community surfaces were not covered because credentials were not provided.", "page": { "appType": "mpa", "framework": "Legacy server-rendered MPA with Mobage JavaScript utilities", "notes": "The mobile homepage is responsive, but several child routes redirect to a fixed-width desktop www.mbga.jp template. Registration redirects to ssl.sp.mbga.jp and dead-ends." }, "evidenceUsed": [ "screenshot", "dom", "evaluate-probe", "layout-metrics", "performance-trace", "har", "discoverability", "headers", "cookies", "trackers", "images", "secrets", "heap-summary", "lighthouse" ], "guidanceConsulted": [ "accessibility", "break-up-long-tasks", "css", "dark-mode", "declarative-dialog-popover-control", "deliver-optimized-decorative-images", "fluid-scaling", "forms", "html", "identify-heavy-scripts", "improve-text-layout-and-legibility", "language-model", "light-dismiss-a-dialog", "manage-recurring-intervals", "optimize-image-priority", "passkey-authentication", "passkeys", "performance", "position-aware-tooltips", "privacy", "same-document-transitions", "scrollytelling", "search-hidden-content", "security", "shrinking-header-on-scroll", "size-aware-styling", "stabilize-reactive-state", "support-global-calendar-systems", "translator", "validate-input-after-interaction", "webmcp" ], "artifacts": [ { "type": "other", "path": "evidence/accessibility-seo-probe.json", "caption": "accessibility seo probe", "findingIds": [ "F07", "F13", "F16", "F18" ] }, { "type": "other", "path": "evidence/cookies.json", "caption": "cookies", "findingIds": [ "F19" ] }, { "type": "screenshot", "path": "evidence/discoverability-crawler.png", "caption": "discoverability crawler", "findingIds": [] }, { "type": "screenshot", "path": "evidence/discoverability-rendered.png", "caption": "discoverability rendered", "findingIds": [] }, { "type": "discoverability", "path": "evidence/discoverability.json", "caption": "discoverability", "findingIds": [] }, { "type": "dom", "path": "evidence/games-dom.json", "caption": "games dom", "findingIds": [ "F05", "F06", "F17" ] }, { "type": "screenshot", "path": "evidence/games-mobile.png", "caption": "games mobile", "findingIds": [ "F05", "F06", "F16", "F21" ] }, { "type": "other", "path": "evidence/headers.json", "caption": "headers", "findingIds": [ "F19", "F20" ] }, { "type": "heap", "path": "evidence/heap-baseline.heapsnapshot", "caption": "heap baseline", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-contrast.png", "caption": "home contrast", "findingIds": [ "F02" ] }, { "type": "screenshot", "path": "evidence/home-dark.png", "caption": "home dark", "findingIds": [ "F01" ] }, { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "home desktop", "findingIds": [ "F09" ] }, { "type": "dom", "path": "evidence/home-dom.json", "caption": "home dom", "findingIds": [] }, { "type": "layout", "path": "evidence/home-layout-mobile.json", "caption": "home layout mobile", "findingIds": [ "F04" ] }, { "type": "screenshot", "path": "evidence/home-mobile.png", "caption": "home mobile", "findingIds": [ "F01", "F04", "F09", "F22" ] }, { "type": "other", "path": "evidence/home-probe.json", "caption": "home probe", "findingIds": [ "F01", "F02", "F03", "F04", "F06", "F15" ] }, { "type": "other", "path": "evidence/home-summary.json", "caption": "home summary", "findingIds": [ "F11", "F22", "F24", "F25" ] }, { "type": "trace-summary", "path": "evidence/home-trace-summary.json", "caption": "home trace summary", "findingIds": [ "F10" ] }, { "type": "trace", "path": "evidence/home-trace.json", "caption": "home trace", "findingIds": [] }, { "type": "har", "path": "evidence/home.har", "caption": "home", "findingIds": [ "F11" ] }, { "type": "other", "path": "evidence/images.json", "caption": "images", "findingIds": [ "F13", "F24" ] }, { "type": "lighthouse", "path": "evidence/lighthouse-detail.json", "caption": "lighthouse detail", "findingIds": [ "F13", "F14", "F15", "F16" ] }, { "type": "lighthouse", "path": "evidence/lighthouse-summary.json", "caption": "lighthouse summary", "findingIds": [ "F10", "F11", "F12", "F25" ] }, { "type": "lighthouse", "path": "evidence/lighthouse.json", "caption": "lighthouse", "findingIds": [ "F12" ] }, { "type": "dom", "path": "evidence/news-dom.json", "caption": "news dom", "findingIds": [] }, { "type": "screenshot", "path": "evidence/news-mobile.png", "caption": "news mobile", "findingIds": [ "F05" ] }, { "type": "dom", "path": "evidence/ranking-dom.json", "caption": "ranking dom", "findingIds": [] }, { "type": "screenshot", "path": "evidence/ranking-mobile.png", "caption": "ranking mobile", "findingIds": [ "F05", "F21" ] }, { "type": "other", "path": "evidence/recon.json", "caption": "recon", "findingIds": [] }, { "type": "dom", "path": "evidence/register-dom.json", "caption": "register dom", "findingIds": [] }, { "type": "screenshot", "path": "evidence/register-mobile.png", "caption": "register mobile", "findingIds": [ "F08", "F23" ] }, { "type": "other", "path": "evidence/register-probe.json", "caption": "register probe", "findingIds": [ "F08", "F21", "F23" ] }, { "type": "other", "path": "evidence/robots-sitemap.json", "caption": "robots sitemap", "findingIds": [ "F17" ] }, { "type": "other", "path": "evidence/secrets.json", "caption": "secrets", "findingIds": [] }, { "type": "other", "path": "evidence/trackers.json", "caption": "trackers", "findingIds": [] } ], "config": { "loaded": false }, "coverage": { "catalogVersion": "modern-web-guidance@0.0.172", "catalogChecksum": "sha256:78ccfdb2d483f4c57d9dafed80fd86c6265585a56457c8dcfddc254b80fb44d7", "expected": 58, "recorded": 58, "judged": 58, "blocked": 0, "notRun": 0, "missing": 0, "unknown": 0, "duplicates": 0, "complete": true }, "checkOutcomes": [ { "principleId": "respect-user-preferences", "checkId": "respects-color-scheme", "confidence": "high", "status": "issues", "findingIds": [ "F01" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The dark-mode screenshot is byte-identical to the normal mobile screenshot and remains a hard-coded white/green surface; the CSS probe found no prefers-color-scheme rule or color-scheme declaration.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-dark.png", "evidence/home-mobile.png", "evidence/home-probe.json" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "confidence": "high", "status": "pass", "method": "evaluate getAnimations under reduced motion", "evidence": "Emulated prefers-reduced-motion: reduce; getAnimations() returned an empty list, so no non-essential motion continued.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "confidence": "high", "status": "issues", "findingIds": [ "F02" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The prefers-contrast: more capture is visually/byte identical to the default capture, and CSS inspection found no contrast preference handling.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-contrast.png", "evidence/home-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "confidence": "high", "status": "issues", "findingIds": [ "F03" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "CSS inspection across the homepage found no view-transition rules or API signal; representative links perform full, abrupt navigations.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "No parallax, scrollytelling, reveal or other scroll-linked motion exists on the representative public surfaces.", "reason": "No parallax, scrollytelling, reveal or other scroll-linked motion exists on the representative public surfaces." }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "No swipe, pull, carousel-drag or gesture-driven control exists on the audited public paths.", "reason": "No swipe, pull, carousel-drag or gesture-driven control exists on the audited public paths." }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "confidence": "high", "status": "issues", "findingIds": [ "F04" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The mobile homepage is 2,882px tall, but the screenshot and CSS probe show static chrome with no progress indicator, shrinking header or scroll-state query.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-layout-mobile.json", "evidence/home-probe.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "No tooltip, popover or edge-positioned menu was exposed on the audited guest paths.", "reason": "No tooltip, popover or edge-positioned menu was exposed on the audited guest paths." }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "confidence": "high", "status": "pass", "method": "visual hierarchy review", "evidence": "Section headings, ranked numbering, explicit “more” links and registration/login controls provide visible attention cues on the homepage.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "confidence": "high", "status": "pass", "method": "load screenshot review", "evidence": "Load screenshots show content immediately with no full-page interstitial, consent wall or obscuring modal.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "No user-invoked overlay or disclosure control was present on the audited guest paths.", "reason": "No user-invoked overlay or disclosure control was present on the audited guest paths." }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "confidence": "high", "status": "pass", "method": "visual viewport review", "evidence": "The mobile homepage dedicates nearly all space below the 40px header to news and game content; chrome is compact.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "confidence": "high", "status": "issues", "findingIds": [ "F05" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The new-games, ranking and news captures render the desktop www.mbga.jp layout as tiny scaled content at 360px; DOM evidence reports fixed 950px content and no viewport meta on the listing template.", "pathIds": [ "home" ], "artifacts": [ "evidence/games-mobile.png", "evidence/ranking-mobile.png", "evidence/news-mobile.png", "evidence/games-dom.json" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "confidence": "high", "status": "issues", "findingIds": [ "F06" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "CSS inspection found no @container usage; listing DOM uses fixed 720/740/950px widths, producing miniature desktop cards on narrow screens.", "pathIds": [ "home" ], "artifacts": [ "evidence/games-mobile.png", "evidence/games-dom.json", "evidence/home-probe.json" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "confidence": "high", "status": "issues", "findingIds": [ "F07" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The active probe found five visible footer links only 15.39px high, well below a comfortable touch target, although keyboard outlines were visible.", "pathIds": [ "home" ], "artifacts": [ "evidence/accessibility-seo-probe.json" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "confidence": "high", "status": "pass", "method": "first-viewport screenshot review", "evidence": "The first viewport identifies Mobage, offers 会員登録/ログイン, and exposes three labeled game-discovery paths.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/register-mobile.png" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "confidence": "high", "status": "issues", "findingIds": [ "F08" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The registration landing says 会員登録, but its only registration links resolve back to the same https://ssl.sp.mbga.jp/_reg URL and no form or next step exists.", "pathIds": [ "register" ], "artifacts": [ "evidence/register-mobile.png", "evidence/register-probe.json" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "confidence": "high", "status": "issues", "findingIds": [ "F09" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "Every homepage capture shows システムエラーが発生しました in a transient toast, with no cause, retry, dismiss or next action.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-desktop.png" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "confidence": "high", "status": "issues", "findingIds": [ "F10" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "Lighthouse measured LCP at 3.8s (score 0.55), while the separate warm trace measured 1.40s; the throttled Lighthouse result indicates a meaningful slow-network risk.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-trace-summary.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "confidence": "high", "status": "pass", "method": "layout observer", "evidence": "Mobile layout observer measured CLS 0.0000375 with image dimensions reserved.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-layout-mobile.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "confidence": "high", "status": "pass", "method": "trace and long-task observers", "evidence": "Trace and layout observers found zero long tasks and 0ms total blocking time.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-trace-summary.json", "evidence/home-layout-mobile.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "confidence": "high", "status": "issues", "findingIds": [ "F11" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "HAR recorded 66 requests and 1,197,051 transferred bytes, including 1,038,487 image bytes and five parser-inserted blocking candidates; Lighthouse estimates 1,100KiB cache, 573KiB image and 1,060ms render-blocking savings.", "pathIds": [ "home" ], "artifacts": [ "evidence/home.har", "evidence/home-summary.json", "evidence/lighthouse-summary.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "confidence": "high", "status": "issues", "findingIds": [ "F12" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "Lighthouse estimates 35KiB unused CSS and 42KiB unused JavaScript on the homepage.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/lighthouse.json" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "confidence": "high", "status": "issues", "findingIds": [ "F13" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "Lighthouse reports no main landmark; the active DOM probe found one image without alt and an empty visible anchor, while the image primitive found many hidden drawer images without alt.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-detail.json", "evidence/accessibility-seo-probe.json", "evidence/images.json" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "confidence": "high", "status": "issues", "findingIds": [ "F14" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "Lighthouse measured #0075ec on #d0d0d0 at 2.86:1 for 11px footer links, below WCAG’s 4.5:1 minimum.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-detail.json" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "confidence": "high", "status": "issues", "findingIds": [ "F13" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "Lighthouse reports no main landmark; the active DOM probe found one image without alt and an empty visible anchor, while the image primitive found many hidden drawer images without alt.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-detail.json", "evidence/accessibility-seo-probe.json", "evidence/images.json" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "confidence": "high", "status": "pass", "method": "mobile screenshot and layout review", "evidence": "Homepage body/game copy remains readable at 360px with no clipping or horizontal overflow; headings are visually distinct.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-layout-mobile.json" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "confidence": "high", "status": "issues", "findingIds": [ "F15" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The live meta viewport contains maximum-scale=1.0 and user-scalable=no; Lighthouse fails the meta-viewport accessibility audit.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/lighthouse-detail.json" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "confidence": "high", "status": "pass", "method": "Lighthouse console audit", "evidence": "Lighthouse errors-in-console audit passed with no logged browser errors.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-detail.json" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "confidence": "high", "status": "pass", "method": "Lighthouse and DOM/image inspection", "evidence": "Lighthouse confirms a valid doctype; DOM shows UTF-8 and all visible layout images reserve dimensions with correct aspect ratio.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-detail.json", "evidence/images.json", "evidence/home-dom.json" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "confidence": "high", "status": "pass", "method": "Lighthouse and active path review", "evidence": "Lighthouse best-practices score is 1.0; no permission prompts appeared, and no paste-blocking form controls were present on audited guest paths.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/register-probe.json" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "confidence": "high", "status": "pass", "method": "DOM metadata inspection", "evidence": "Homepage title is モバゲー and has a descriptive Japanese meta description; representative listing title/description are specific.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/games-dom.json" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "confidence": "high", "status": "issues", "findingIds": [ "F16" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "Lighthouse found many javascript:void(0) links and the active probe counted 37; key game cards use onclick without href. Representative listing routes serve a desktop layout at 360px.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-detail.json", "evidence/accessibility-seo-probe.json", "evidence/games-mobile.png" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "confidence": "high", "status": "issues", "findingIds": [ "F17" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The new-games route redirected from https://sp.mbga.jp to http://www.mbga.jp and declares an http canonical; sitemap.xml fetch failed while robots.txt was available.", "pathIds": [ "home" ], "artifacts": [ "evidence/games-dom.json", "evidence/robots-sitemap.json" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "confidence": "high", "status": "issues", "findingIds": [ "F18" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The probe found no JSON-LD and an empty og:description; the page represents games/news entities that could support accurate structured previews.", "pathIds": [ "home" ], "artifacts": [ "evidence/accessibility-seo-probe.json" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "confidence": "high", "status": "issues", "findingIds": [ "F19" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "Header inspection found no CSP or HSTS. All four first-party cookies lack Secure and use SameSite=None; two are script-readable.", "pathIds": [ "home" ], "artifacts": [ "evidence/headers.json", "evidence/cookies.json" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "confidence": "high", "status": "pass", "method": "tracker, HAR and secrets inspection", "evidence": "Tracker probe found no known trackers and only two third-party origins; secrets scan found no exposed credentials.", "pathIds": [ "home" ], "artifacts": [ "evidence/trackers.json", "evidence/home-summary.json", "evidence/secrets.json" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "confidence": "high", "status": "pass", "method": "load and registration DOM review", "evidence": "No permission prompt or permission API use occurred on load; the audited guest registration surface contains no password form, so no password-only auth implementation was observed in scope.", "pathIds": [ "home" ], "artifacts": [ "evidence/register-probe.json", "evidence/home-probe.json" ] }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "confidence": "high", "status": "issues", "findingIds": [ "F20" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The main document lacks clickjacking protection, nosniff, Referrer-Policy and Permissions-Policy in addition to CSP/HSTS.", "pathIds": [ "home" ], "artifacts": [ "evidence/headers.json" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "confidence": "high", "status": "pass", "method": "raw HTML versus rendered DOM comparison", "evidence": "Discoverability comparison found 86% raw-HTML coverage, title/H1/description present, and no JS shell.", "pathIds": [ "home" ], "artifacts": [ "evidence/discoverability.json", "evidence/discoverability-crawler.png", "evidence/discoverability-rendered.png" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "confidence": "high", "status": "issues", "findingIds": [ "F21" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "Home stays on sp.mbga.jp, but game/news/ranking routes redirect to a desktop www.mbga.jp template and registration moves to ssl.sp.mbga.jp, losing a consistent responsive context.", "pathIds": [ "home" ], "artifacts": [ "evidence/games-mobile.png", "evidence/ranking-mobile.png", "evidence/register-probe.json" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "The audited public surface is a server-rendered game portal rather than an installable app; no offline claim or local-app journey is presented.", "reason": "The audited public surface is a server-rendered game portal rather than an installable app; no offline claim or local-app journey is presented." }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "confidence": "high", "status": "issues", "findingIds": [ "F22" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "A system-error toast appears during normal load with no retry, details, fallback content change or durable status; one analytics request also aborts in the HAR.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-summary.json" ] }, { "principleId": "be-internationalised", "checkId": "lang-dir-and-logical-properties", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "The service is explicitly Japanese-only, with html lang=ja and no localized variant discovered; cross-locale layout was not part of the public product surface.", "reason": "The service is explicitly Japanese-only, with html lang=ja and no localized variant discovered; cross-locale layout was not part of the public product surface." }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "No user-facing date, currency, duration or locale-switching data appears on the audited public paths.", "reason": "No user-facing date, currency, duration or locale-switching data appears on the audited public paths." }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "No event time or cross-time-zone scheduling data appears on the audited public paths.", "reason": "No event time or cross-time-zone scheduling data appears on the audited public paths." }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "confidence": "high", "status": "pass", "method": "visual journey review", "evidence": "No consent wall, confirmshaming, preselected upsell or disguised advertisement appeared on the audited guest and registration surfaces.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/register-mobile.png" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "No editable user form or validation step is exposed before the registration dead-end.", "reason": "No editable user form or validation step is exposed before the registration dead-end." }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "No editable sign-in, address, payment or signup fields are exposed on the audited guest registration surface.", "reason": "No editable sign-in, address, payment or signup fields are exposed on the audited guest registration surface." }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "confidence": "high", "status": "issues", "findingIds": [ "F23" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The account landing states normal registration is required, yet the registration control points back to the same page and exposes no next step.", "pathIds": [ "register" ], "artifacts": [ "evidence/register-mobile.png", "evidence/register-probe.json" ] }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "confidence": "high", "status": "issues", "findingIds": [ "F24" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "Images account for 1,038,487 of 1,197,051 transferred bytes; 39 of 45 inspected images are PNG/GIF with no modern-format images, and 16 below-fold images are not lazy-loaded.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/images.json" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "confidence": "high", "status": "pass", "method": "trace, HAR and screenshot review", "evidence": "Trace found no long tasks, HAR shows only one XHR/fetch, and no autoplay media or continuous animation was observed.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-trace-summary.json", "evidence/home-summary.json", "evidence/home-mobile.png" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "confidence": "high", "status": "issues", "findingIds": [ "F25" ], "method": "Direct visual/objective evidence review against the mapped check", "evidence": "The five largest image resources alone transfer about 767KiB, mostly legacy @2x sprites; Lighthouse estimates 573KiB image-delivery savings.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/lighthouse-summary.json" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "No declared agent-facing intent exists and the public guest portal does not expose a safe transaction flow for agents.", "reason": "No declared agent-facing intent exists and the public guest portal does not expose a safe transaction flow for agents." }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "No summarisation, language-model or other inference task is part of the audited public experience.", "reason": "No summarisation, language-model or other inference task is part of the audited public experience." }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "confidence": "high", "status": "not-applicable", "method": "Applicability judgement from recon", "evidence": "The audited guest pages expose only full navigations and no representative same-page interaction suitable for a meaningful 10x leak cycle.", "reason": "The audited guest pages expose only full navigations and no representative same-page interaction suitable for a meaningful 10x leak cycle." }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "confidence": "high", "status": "pass", "method": "heap summary", "evidence": "Single-state heap summary measured 91,650 nodes and 5,026,332 self-size bytes, proportionate for the rendered portal.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.heapsnapshot" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "confidence": "high", "status": "pass", "method": "heap constructor summary", "evidence": "The heap constructor summary contains no Detached* population; the page has no repeated same-document interaction in scope that could accumulate listeners or timers.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.heapsnapshot" ] } ], "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F01", "F02" ] }, { "principleId": "implement-natural-interactions", "expectation": "default", "status": "issues", "findingIds": [ "F03" ] }, { "principleId": "provide-guided-navigation", "expectation": "default", "status": "issues", "findingIds": [ "F04" ] }, { "principleId": "maximize-content-reduce-noise", "expectation": "default", "status": "pass" }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "issues", "findingIds": [ "F05", "F06", "F07" ] }, { "principleId": "support-core-task-success", "expectation": "default", "status": "issues", "findingIds": [ "F08", "F09" ] }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F10", "F11", "F12" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "issues", "findingIds": [ "F13", "F14", "F15" ] }, { "principleId": "follow-best-practices", "expectation": "default", "status": "pass" }, { "principleId": "be-discoverable", "expectation": "default", "status": "issues", "findingIds": [ "F16", "F17", "F18" ] }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F19", "F20" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "issues", "findingIds": [ "F21", "F22" ] }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "not-applicable", "reason": "The service is explicitly Japanese-only, with html lang=ja and no localized variant discovered; cross-locale layout was not part of the public product surface. No user-facing date, currency, duration or locale-switching data appears on the audited public paths. No event time or cross-time-zone scheduling data appears on the audited public paths." }, { "principleId": "be-trustworthy", "expectation": "default", "status": "issues", "findingIds": [ "F23" ] }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F24", "F25" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "not-applicable", "reason": "No declared agent-facing intent exists and the public guest portal does not expose a safe transaction flow for agents. No summarisation, language-model or other inference task is part of the audited public experience." }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "pass" } ], "paths": [ { "id": "home", "description": "Public mobile homepage: entry point, content discovery, global navigation, preferences, performance and security.", "url": "https://sp.mbga.jp/", "conditions": [ "desktop", "viewport: 360x800", "prefers-color-scheme: dark", "prefers-contrast: more", "prefers-reduced-motion: reduce", "keyboard focus" ], "result": "issues" }, { "id": "games", "description": "New-games listing archetype, selected to test the main browse journey and form-factor routing.", "url": "https://sp.mbga.jp/_game_newly_list", "conditions": [ "viewport: 360x800" ], "result": "issues" }, { "id": "ranking", "description": "Ranking/listing archetype, selected as a second high-value discovery route.", "url": "https://sp.mbga.jp/_game_ranking?genre=1000&sex_type=A", "conditions": [ "viewport: 360x800" ], "result": "issues" }, { "id": "news", "description": "News/content route, selected to represent editorial content.", "url": "https://sp.mbga.jp/_news_top", "conditions": [ "viewport: 360x800" ], "result": "issues" }, { "id": "register", "description": "Primary conversion journey from the homepage to member registration/login.", "url": "https://sp.mbga.jp/_reg", "conditions": [ "viewport: 360x800" ], "result": "issues" } ], "findings": [ { "id": "F01", "severity": "medium", "principleId": "respect-user-preferences", "principleCheckId": "respects-color-scheme", "guidanceId": "dark-mode", "guidanceCategory": "user-experience", "summary": "The site ignores the user’s dark theme preference.", "evidence": "The dark-mode screenshot is byte-identical to the normal mobile screenshot and remains a hard-coded white/green surface; the CSS probe found no prefers-color-scheme rule or color-scheme declaration.", "suggestedFix": "Declare color-scheme and provide preference-driven dark surface, text, icon and browser-chrome colors.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/home-dark.png", "evidence/home-mobile.png", "evidence/home-probe.json" ], "effort": "small" }, { "id": "F02", "severity": "low", "principleId": "respect-user-preferences", "principleCheckId": "respects-contrast", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "summary": "High-contrast preference receives no adaptation.", "evidence": "The prefers-contrast: more capture is visually/byte identical to the default capture, and CSS inspection found no contrast preference handling.", "suggestedFix": "Add forced-colors/prefers-contrast adaptations and preserve control boundaries and legible text.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/home-contrast.png", "evidence/home-probe.json" ], "effort": "small" }, { "id": "F03", "severity": "low", "principleId": "implement-natural-interactions", "principleCheckId": "view-transitions", "guidanceId": "same-document-transitions", "guidanceCategory": "modern-web-guidance", "summary": "Navigation swaps are abrupt and do not use View Transitions.", "evidence": "CSS inspection across the homepage found no view-transition rules or API signal; representative links perform full, abrupt navigations.", "suggestedFix": "Use same-document or cross-document View Transitions for meaningful route/state changes, with reduced-motion handling.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/home-probe.json" ], "effort": "medium" }, { "id": "F04", "severity": "low", "principleId": "provide-guided-navigation", "principleCheckId": "scroll-state-aware-chrome", "guidanceId": "shrinking-header-on-scroll", "guidanceCategory": "modern-web-guidance", "summary": "Long pages provide no scroll-position feedback.", "evidence": "The mobile homepage is 2,882px tall, but the screenshot and CSS probe show static chrome with no progress indicator, shrinking header or scroll-state query.", "suggestedFix": "Add a lightweight scroll-state-aware header or progress affordance where it helps orientation.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/home-mobile.png", "evidence/home-layout-mobile.json", "evidence/home-probe.json" ], "effort": "small" }, { "id": "F05", "severity": "high", "principleId": "adapt-to-the-form-factor", "principleCheckId": "responsive-no-horizontal-scroll", "guidanceId": "fluid-scaling", "guidanceCategory": "modern-web-guidance", "summary": "Core listing routes serve a desktop-only 950px layout into a 360px viewport.", "evidence": "The new-games, ranking and news captures render the desktop www.mbga.jp layout as tiny scaled content at 360px; DOM evidence reports fixed 950px content and no viewport meta on the listing template.", "suggestedFix": "Keep users on a responsive HTTPS route and replace fixed 950px desktop templates with intrinsic/fluid layouts and a valid viewport meta tag.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/games-mobile.png", "evidence/ranking-mobile.png", "evidence/news-mobile.png", "evidence/games-dom.json" ], "effort": "large" }, { "id": "F06", "severity": "medium", "principleId": "adapt-to-the-form-factor", "principleCheckId": "component-level-responsiveness", "guidanceId": "size-aware-styling", "guidanceCategory": "modern-web-guidance", "summary": "Reusable cards and navigation do not adapt at component level.", "evidence": "CSS inspection found no @container usage; listing DOM uses fixed 720/740/950px widths, producing miniature desktop cards on narrow screens.", "suggestedFix": "Use container queries and intrinsic card grids so reused listings adapt to their available inline size.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/games-mobile.png", "evidence/games-dom.json", "evidence/home-probe.json" ], "effort": "medium" }, { "id": "F07", "severity": "medium", "principleId": "adapt-to-the-form-factor", "principleCheckId": "input-modality-aware", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "summary": "Several footer targets are too short for touch.", "evidence": "The active probe found five visible footer links only 15.39px high, well below a comfortable touch target, although keyboard outlines were visible.", "suggestedFix": "Increase interactive target boxes to at least 24px minimum and preferably about 44px without shrinking text.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/accessibility-seo-probe.json" ], "effort": "small" }, { "id": "F08", "severity": "high", "principleId": "support-core-task-success", "principleCheckId": "primary-flow-completion", "guidanceId": "forms", "guidanceCategory": "modern-web-guidance", "summary": "The public member-registration journey dead-ends.", "evidence": "The registration landing says 会員登録, but its only registration links resolve back to the same https://ssl.sp.mbga.jp/_reg URL and no form or next step exists.", "suggestedFix": "Provide a clear, functioning registration step or explain eligibility/availability and offer an actionable recovery route.", "confidence": "high", "pathId": "register", "url": "https://sp.mbga.jp/_reg", "artifacts": [ "evidence/register-mobile.png", "evidence/register-probe.json" ], "effort": "large" }, { "id": "F09", "severity": "medium", "principleId": "support-core-task-success", "principleCheckId": "clear-system-state-and-recovery", "guidanceId": "forms", "guidanceCategory": "modern-web-guidance", "summary": "A generic system error appears without a recovery action.", "evidence": "Every homepage capture shows システムエラーが発生しました in a transient toast, with no cause, retry, dismiss or next action.", "suggestedFix": "Replace the generic toast with contextual status and a retry/dismiss path; preserve the user’s location and input.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/home-mobile.png", "evidence/home-desktop.png" ], "effort": "small" }, { "id": "F10", "severity": "medium", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "guidanceCategory": "modern-web-guidance", "summary": "Mobile LCP is slower than the good threshold.", "evidence": "Lighthouse measured LCP at 3.8s (score 0.55), while the separate warm trace measured 1.40s; the throttled Lighthouse result indicates a meaningful slow-network risk.", "suggestedFix": "Prioritize the LCP asset, shorten render-blocking chains, and validate under mobile throttling.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-trace-summary.json" ], "effort": "medium" }, { "id": "F11", "severity": "medium", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-resource-delivery", "guidanceId": "optimize-image-priority", "guidanceCategory": "modern-web-guidance", "summary": "Caching, image delivery and render blocking waste load time.", "evidence": "HAR recorded 66 requests and 1,197,051 transferred bytes, including 1,038,487 image bytes and five parser-inserted blocking candidates; Lighthouse estimates 1,100KiB cache, 573KiB image and 1,060ms render-blocking savings.", "suggestedFix": "Set long immutable cache lifetimes on versioned assets, modernize image delivery, and defer/non-block non-critical scripts and styles.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/home.har", "evidence/home-summary.json", "evidence/lighthouse-summary.json" ], "effort": "medium" }, { "id": "F12", "severity": "low", "principleId": "be-fast-and-stable", "principleCheckId": "trim-unused-and-duplicate-code", "guidanceId": "identify-heavy-scripts", "guidanceCategory": "modern-web-guidance", "summary": "The page ships avoidable unused CSS and JavaScript.", "evidence": "Lighthouse estimates 35KiB unused CSS and 42KiB unused JavaScript on the homepage.", "suggestedFix": "Split bundles by surface and remove legacy or unused rules and script paths.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/lighthouse-summary.json", "evidence/lighthouse.json" ], "effort": "medium" }, { "id": "F13", "severity": "medium", "principleId": "be-inclusive", "principleCheckId": "names-roles-labels", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "summary": "The document lacks a main landmark and includes unnamed image/link content.", "evidence": "Lighthouse reports no main landmark; the active DOM probe found one image without alt and an empty visible anchor, while the image primitive found many hidden drawer images without alt.", "suggestedFix": "Add one main landmark and ensure every meaningful image/control has an accessible name; use empty alt only for decoration.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/lighthouse-detail.json", "evidence/accessibility-seo-probe.json", "evidence/images.json" ], "effort": "small" }, { "id": "F14", "severity": "medium", "principleId": "be-inclusive", "principleCheckId": "sufficient-contrast", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "summary": "Footer links fail minimum text contrast.", "evidence": "Lighthouse measured #0075ec on #d0d0d0 at 2.86:1 for 11px footer links, below WCAG’s 4.5:1 minimum.", "suggestedFix": "Use a darker link color or lighter surface and retest all footer states.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/lighthouse-detail.json" ], "effort": "small" }, { "id": "F15", "severity": "high", "principleId": "be-inclusive", "principleCheckId": "zoom-reflow-targets-and-media", "guidanceId": "accessibility", "guidanceCategory": "modern-web-guidance", "summary": "The mobile viewport explicitly disables zoom.", "evidence": "The live meta viewport contains maximum-scale=1.0 and user-scalable=no; Lighthouse fails the meta-viewport accessibility audit.", "suggestedFix": "Remove user-scalable=no and restrictive maximum-scale so users can zoom; ensure layouts reflow at magnification.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/home-probe.json", "evidence/lighthouse-detail.json" ], "effort": "trivial" }, { "id": "F16", "severity": "high", "principleId": "be-discoverable", "principleCheckId": "crawlable-and-mobile-friendly", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "summary": "Important links are not crawlable and route templates are not mobile-friendly.", "evidence": "Lighthouse found many javascript:void(0) links and the active probe counted 37; key game cards use onclick without href. Representative listing routes serve a desktop layout at 360px.", "suggestedFix": "Use real href URLs for navigation and maintain responsive canonical route templates.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/lighthouse-detail.json", "evidence/accessibility-seo-probe.json", "evidence/games-mobile.png" ], "effort": "medium" }, { "id": "F17", "severity": "medium", "principleId": "be-discoverable", "principleCheckId": "canonical-and-indexing-signals", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "summary": "Canonical and route signals downgrade to HTTP and disagree with the requested mobile URL.", "evidence": "The new-games route redirected from https://sp.mbga.jp to http://www.mbga.jp and declares an http canonical; sitemap.xml fetch failed while robots.txt was available.", "suggestedFix": "Use HTTPS canonicals, eliminate host/protocol downgrade redirects, and publish a reachable sitemap consistent with robots.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/games-dom.json", "evidence/robots-sitemap.json" ], "effort": "medium" }, { "id": "F18", "severity": "low", "principleId": "be-discoverable", "principleCheckId": "structured-and-shareable-metadata", "guidanceId": "html", "guidanceCategory": "modern-web-guidance", "summary": "Share metadata is incomplete for a rich game portal.", "evidence": "The probe found no JSON-LD and an empty og:description; the page represents games/news entities that could support accurate structured previews.", "suggestedFix": "Add accurate Open Graph descriptions and schema.org JSON-LD for the visible WebSite, games and editorial entities.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/accessibility-seo-probe.json" ], "effort": "small" }, { "id": "F19", "severity": "high", "principleId": "be-private-and-secure", "principleCheckId": "secure-transport-and-headers", "guidanceId": "security", "guidanceCategory": "modern-web-guidance", "summary": "Transport is HTTPS, but CSP and cookie protections are missing.", "evidence": "Header inspection found no CSP or HSTS. All four first-party cookies lack Secure and use SameSite=None; two are script-readable.", "suggestedFix": "Deploy CSP and HSTS, mark HTTPS cookies Secure, use Lax/Strict where possible, and make sensitive cookies HttpOnly.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/headers.json", "evidence/cookies.json" ], "effort": "medium" }, { "id": "F20", "severity": "high", "principleId": "be-private-and-secure", "principleCheckId": "defensive-browser-policies", "guidanceId": "security", "guidanceCategory": "modern-web-guidance", "summary": "Browser-enforced defensive headers are absent.", "evidence": "The main document lacks clickjacking protection, nosniff, Referrer-Policy and Permissions-Policy in addition to CSP/HSTS.", "suggestedFix": "Add frame-ancestors or X-Frame-Options, nosniff, strict referrer policy and a least-privilege Permissions-Policy.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/headers.json" ], "effort": "small" }, { "id": "F21", "severity": "medium", "principleId": "be-resilient", "principleCheckId": "resilient-runtime-behaviour", "guidanceId": "stabilize-reactive-state", "guidanceCategory": "modern-web-guidance", "summary": "Runtime routing is inconsistent across public surfaces.", "evidence": "Home stays on sp.mbga.jp, but game/news/ranking routes redirect to a desktop www.mbga.jp template and registration moves to ssl.sp.mbga.jp, losing a consistent responsive context.", "suggestedFix": "Unify routing and templates so navigation preserves device-appropriate state and HTTPS origin expectations.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/games-mobile.png", "evidence/ranking-mobile.png", "evidence/register-probe.json" ], "effort": "large" }, { "id": "F22", "severity": "medium", "principleId": "be-resilient", "principleCheckId": "network-and-http-failure-states", "guidanceId": "forms", "guidanceCategory": "modern-web-guidance", "summary": "The observed failure state is not actionable.", "evidence": "A system-error toast appears during normal load with no retry, details, fallback content change or durable status; one analytics request also aborts in the HAR.", "suggestedFix": "Provide explicit retry/offline/error states and keep core content/actions usable when secondary requests fail.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/home-mobile.png", "evidence/home-summary.json" ], "effort": "small" }, { "id": "F23", "severity": "medium", "principleId": "be-trustworthy", "principleCheckId": "safe-commercial-and-account-flows", "guidanceId": "forms", "guidanceCategory": "modern-web-guidance", "summary": "Account creation is presented as available but cannot proceed.", "evidence": "The account landing states normal registration is required, yet the registration control points back to the same page and exposes no next step.", "suggestedFix": "Make account availability and requirements explicit and provide a reversible, functioning registration/login journey.", "confidence": "high", "pathId": "register", "url": "https://sp.mbga.jp/_reg", "artifacts": [ "evidence/register-mobile.png", "evidence/register-probe.json" ], "effort": "large" }, { "id": "F24", "severity": "medium", "principleId": "be-sustainable", "principleCheckId": "optimised-assets", "guidanceId": "deliver-optimized-decorative-images", "guidanceCategory": "modern-web-guidance", "summary": "The image payload is disproportionate and uses legacy formats.", "evidence": "Images account for 1,038,487 of 1,197,051 transferred bytes; 39 of 45 inspected images are PNG/GIF with no modern-format images, and 16 below-fold images are not lazy-loaded.", "suggestedFix": "Convert photographic/decorative assets to AVIF/WebP where suitable, consolidate sprites, provide responsive sources, and lazy-load below-fold images.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/home-summary.json", "evidence/images.json" ], "effort": "medium" }, { "id": "F25", "severity": "medium", "principleId": "be-sustainable", "principleCheckId": "third-party-and-media-budget", "guidanceId": "deliver-optimized-decorative-images", "guidanceCategory": "modern-web-guidance", "summary": "Decorative sprite and banner bytes dominate the mobile page.", "evidence": "The five largest image resources alone transfer about 767KiB, mostly legacy @2x sprites; Lighthouse estimates 573KiB image-delivery savings.", "suggestedFix": "Set an image/media budget and replace legacy oversized sprites with scoped SVG/modern raster assets loaded only where needed.", "confidence": "high", "pathId": "home", "url": "https://sp.mbga.jp/", "artifacts": [ "evidence/home-summary.json", "evidence/lighthouse-summary.json" ], "effort": "medium" } ], "taskList": [ { "id": "T01", "title": "Keep users on a responsive HTTPS route and replace fixed 950px desktop templates with intrinsic/fluid layouts and a valid viewport meta tag.", "priority": 1, "findingIds": [ "F05" ], "guidanceId": "fluid-scaling", "status": "open" }, { "id": "T02", "title": "Provide a clear, functioning registration step or explain eligibility/availability and offer an actionable recovery route.", "priority": 2, "findingIds": [ "F08" ], "guidanceId": "forms", "status": "open" }, { "id": "T03", "title": "Deploy CSP and HSTS, mark HTTPS cookies Secure, use Lax/Strict where possible, and make sensitive cookies HttpOnly.", "priority": 3, "findingIds": [ "F19" ], "guidanceId": "security", "status": "open" }, { "id": "T04", "title": "Remove user-scalable=no and restrictive maximum-scale so users can zoom; ensure layouts reflow at magnification.", "priority": 4, "findingIds": [ "F15" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T05", "title": "Use real href URLs for navigation and maintain responsive canonical route templates.", "priority": 5, "findingIds": [ "F16" ], "guidanceId": "html", "status": "open" }, { "id": "T06", "title": "Add frame-ancestors or X-Frame-Options, nosniff, strict referrer policy and a least-privilege Permissions-Policy.", "priority": 6, "findingIds": [ "F20" ], "guidanceId": "security", "status": "open" }, { "id": "T07", "title": "Prioritize the LCP asset, shorten render-blocking chains, and validate under mobile throttling.", "priority": 7, "findingIds": [ "F10" ], "guidanceId": "performance", "status": "open" }, { "id": "T08", "title": "Set long immutable cache lifetimes on versioned assets, modernize image delivery, and defer/non-block non-critical scripts and styles.", "priority": 8, "findingIds": [ "F11" ], "guidanceId": "optimize-image-priority", "status": "open" }, { "id": "T09", "title": "Add one main landmark and ensure every meaningful image/control has an accessible name; use empty alt only for decoration.", "priority": 9, "findingIds": [ "F13" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T10", "title": "Use a darker link color or lighter surface and retest all footer states.", "priority": 10, "findingIds": [ "F14" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T11", "title": "Use HTTPS canonicals, eliminate host/protocol downgrade redirects, and publish a reachable sitemap consistent with robots.", "priority": 11, "findingIds": [ "F17" ], "guidanceId": "html", "status": "open" }, { "id": "T12", "title": "Unify routing and templates so navigation preserves device-appropriate state and HTTPS origin expectations.", "priority": 12, "findingIds": [ "F21" ], "guidanceId": "stabilize-reactive-state", "status": "open" }, { "id": "T13", "title": "Provide explicit retry/offline/error states and keep core content/actions usable when secondary requests fail.", "priority": 13, "findingIds": [ "F22" ], "guidanceId": "forms", "status": "open" }, { "id": "T14", "title": "Make account availability and requirements explicit and provide a reversible, functioning registration/login journey.", "priority": 14, "findingIds": [ "F23" ], "guidanceId": "forms", "status": "open" }, { "id": "T15", "title": "Convert photographic/decorative assets to AVIF/WebP where suitable, consolidate sprites, provide responsive sources, and lazy-load below-fold images.", "priority": 15, "findingIds": [ "F24" ], "guidanceId": "deliver-optimized-decorative-images", "status": "open" }, { "id": "T16", "title": "Set an image/media budget and replace legacy oversized sprites with scoped SVG/modern raster assets loaded only where needed.", "priority": 16, "findingIds": [ "F25" ], "guidanceId": "deliver-optimized-decorative-images", "status": "open" }, { "id": "T17", "title": "Use container queries and intrinsic card grids so reused listings adapt to their available inline size.", "priority": 17, "findingIds": [ "F06" ], "guidanceId": "size-aware-styling", "status": "open" }, { "id": "T18", "title": "Increase interactive target boxes to at least 24px minimum and preferably about 44px without shrinking text.", "priority": 18, "findingIds": [ "F07" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T19", "title": "Replace the generic toast with contextual status and a retry/dismiss path; preserve the user’s location and input.", "priority": 19, "findingIds": [ "F09" ], "guidanceId": "forms", "status": "open" }, { "id": "T20", "title": "Declare color-scheme and provide preference-driven dark surface, text, icon and browser-chrome colors.", "priority": 20, "findingIds": [ "F01" ], "guidanceId": "dark-mode", "status": "open" }, { "id": "T21", "title": "Add forced-colors/prefers-contrast adaptations and preserve control boundaries and legible text.", "priority": 21, "findingIds": [ "F02" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T22", "title": "Use same-document or cross-document View Transitions for meaningful route/state changes, with reduced-motion handling.", "priority": 22, "findingIds": [ "F03" ], "guidanceId": "same-document-transitions", "status": "open" }, { "id": "T23", "title": "Add a lightweight scroll-state-aware header or progress affordance where it helps orientation.", "priority": 23, "findingIds": [ "F04" ], "guidanceId": "shrinking-header-on-scroll", "status": "open" }, { "id": "T24", "title": "Split bundles by surface and remove legacy or unused rules and script paths.", "priority": 24, "findingIds": [ "F12" ], "guidanceId": "identify-heavy-scripts", "status": "open" }, { "id": "T25", "title": "Add accurate Open Graph descriptions and schema.org JSON-LD for the visible WebSite, games and editorial entities.", "priority": 25, "findingIds": [ "F18" ], "guidanceId": "html", "status": "open" } ], "budget": { "pathCount": 5, "auditPasses": 1 }, "agent": "pi", "runId": "2026-07-19T01-16-33-738Z" }