{ "url": "https://tenki.jp", "auditedAt": "2026-07-23T01:50:30.795Z", "mode": "report", "status": "completed", "statusDetail": "Coverage-complete audit of eight representative paths/templates. Excluded: destructive account actions, authenticated member pages and every regional URL; sampled templates represent those repeated surfaces.", "page": { "appType": "mpa", "framework": "server-rendered multi-page site with jQuery/third-party scripts", "notes": "Public Japanese weather publisher. Core HTML survives without JavaScript, but the desktop shell is scaled down on mobile and third-party advertising dominates transfer/runtime cost." }, "evidenceUsed": [ "screenshot", "dom", "layout-metrics", "evaluate-probe", "trace", "har", "headers", "cookies", "trackers", "images", "secrets", "discoverability", "lighthouse", "axe-core", "heap-summary" ], "guidanceConsulted": [ "dark-mode", "component-specific-light-dark-theme", "accessibility", "adapt-scrollbar-to-contrast-preferences", "same-document-transitions", "cross-document-transitions", "group-element-transitions", "faster-spa-view-transitions", "scrollytelling", "parallax-scroll-effects", "scroll-entry-exit-effects", "carousel-slide-effects", "physics-based-easing", "individual-transform-properties", "animate-element-entry-exit", "animate-to-from-top-layer", "animate-to-intrinsic-sizes", "dynamic-sibling-animations", "interactive-content-reveal", "pull-to-reveal", "swipe-to-remove", "shrinking-header-on-scroll", "scroll-progress-indicator", "scroll-position-aware-elements", "scroll-snap-realtime-feedback", "scroll-snap-state-sync", "scroll-target-on-load", "soft-edge-content-fade", "scrollability-affordance-hints", "anchor-positioning-tab-underline", "position-aware-tooltips", "interest-triggered-tooltips", "interest-triggered-action-previews", "directional-navigation-transitions", "carousel-snap-highlights", "navigation-drawer", "stack-drill-down", "persistent-app-tours", "persistent-toast-notifications", "light-dismiss-a-dialog", "platform-controls-dismiss-dialog", "declarative-dialog-popover-control", "animated-select-picker", "branded-select-styling", "brand-consistent-forms", "custom-select-picker-layouts", "rich-media-picker", "complex-shapes", "shaped-cutouts", "overflow-clipping-control", "visually-texture-content", "apply-webgl-shaders", "interactive-content-in-3d-scenes", "highlight-text-ranges", "prevent-text-wrapping", "customize-scrollbar-color-and-thickness", "export-html-media-from-canvas", "fluid-scaling", "calculate-with-intrinsic-sizes", "css-layout", "size-aware-styling", "content-based-styling", "child-state-based-styling", "design-token-reactivity", "dynamic-sibling-styling", "form-fields-automatically-fit-contents", "improve-text-layout-and-legibility", "forms", "accessible-error-announcement", "required-field-feedback", "validate-input-after-interaction", "identify-inp-causes", "schedule-tasks-by-priority", "optimize-preload-priority", "improve-next-page-load-performance", "interactions-in-complex-layouts", "performance", "visually-stable-font-fallbacks", "break-up-long-tasks", "identify-heavy-scripts", "optimize-script-priority", "defer-rendering-heavy-content", "defer-work-until-scroll-ends", "optimize-image-priority", "conditional-async-dependencies", "expose-canvas-content-to-browser-features", "move-dom-element-without-losing-state", "precise-text-alignment", "visually-stable-mixed-fonts", "css", "html", "reduce-style-repetition", "security", "privacy", "batch-analytics-events", "full-session-analytics", "calculate-total-foreground-time", "passkeys", "passkey-registration", "passkey-authentication", "passkey-reauthentication", "passkey-conditional-create", "passkey-management", "flicker-free-client-side-ab-testing", "consistent-cross-document-transitions", "stabilize-reactive-state", "resilient-context-menus-and-nested-dropdowns", "persistent-top-layer-ui", "detect-initial-visibility-state", "sequence-distributed-events", "translator", "language-detection", "support-global-calendar-systems", "capture-location-agnostic-data", "format-human-readable-durations", "manage-recurring-intervals", "calculate-event-differentials", "coordinate-global-events", "model-partial-time-concepts", "search-hidden-content", "select-menu-interaction", "style-parent-with-has", "autofill-address-form", "autofill-payment-form", "autofill-sign-in-form", "autofill-sign-up-form", "autofill-highlight-inputs", "deliver-optimized-decorative-images", "resolution-optimized-pseudo-elements", "deprioritize-background-fetches", "efficient-background-processing", "webmcp", "agentic-forms", "agentic-javascript-tools", "language-model", "summarizer" ], "artifacts": [ { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "Desktop homepage initial viewport", "condition": "desktop", "findingIds": [ "F04", "F22" ] }, { "type": "screenshot", "path": "evidence/home-mobile.png", "caption": "Homepage at 360x800, desktop canvas scaled down", "condition": "viewport: 360x800", "findingIds": [ "F05" ] }, { "type": "screenshot", "path": "evidence/home-dark.png", "caption": "Homepage under dark preference remains light", "condition": "prefers-color-scheme: dark", "findingIds": [ "F01" ] }, { "type": "screenshot", "path": "evidence/home-contrast.png", "caption": "Homepage under forced colours/high contrast", "condition": "forced-colors: active, prefers-contrast: more", "findingIds": [] }, { "type": "dom", "path": "evidence/home-dom.json", "caption": "Homepage DOM and computed styles", "condition": "desktop", "findingIds": [ "F01" ] }, { "type": "layout", "path": "evidence/home-layout-mobile.json", "caption": "Homepage mobile layout metrics", "condition": "viewport: 360x800", "findingIds": [ "F05" ] }, { "type": "layout", "path": "evidence/home-layout-desktop.json", "caption": "Homepage desktop layout/CLS metrics", "condition": "desktop", "findingIds": [] }, { "type": "other", "path": "evidence/reduced-motion.json", "caption": "Reduced-motion animation probe", "condition": "prefers-reduced-motion: reduce", "findingIds": [] }, { "type": "trace", "path": "evidence/home-trace.json", "caption": "Homepage DevTools performance trace", "condition": "desktop", "findingIds": [] }, { "type": "trace-summary", "path": "evidence/home-trace-summary.json", "caption": "Compact homepage performance trace summary", "condition": "desktop", "findingIds": [ "F06" ] }, { "type": "har", "path": "evidence/home.har", "caption": "Homepage network archive", "condition": "desktop", "findingIds": [ "F07" ] }, { "type": "har-summary", "path": "evidence/home-summary.json", "caption": "Compact homepage network summary", "condition": "desktop", "findingIds": [ "F04", "F07", "F16", "F20", "F21", "F22" ] }, { "type": "other", "path": "evidence/headers.json", "caption": "Security response-header audit", "condition": "desktop", "findingIds": [ "F15", "F18" ] }, { "type": "other", "path": "evidence/cookies.json", "caption": "Cookie security audit", "condition": "desktop", "findingIds": [ "F15" ] }, { "type": "other", "path": "evidence/trackers.json", "caption": "Third-party tracker-origin audit", "condition": "desktop", "findingIds": [ "F16", "F21" ] }, { "type": "other", "path": "evidence/images.json", "caption": "Image dimensions, format and loading audit", "condition": "desktop", "findingIds": [ "F08", "F12", "F20" ] }, { "type": "other", "path": "evidence/secrets.json", "caption": "Client-side secret scan", "condition": "desktop", "findingIds": [] }, { "type": "discoverability", "path": "evidence/discoverability.json", "caption": "Homepage raw HTML/rendered comparison", "condition": "JavaScript on/off", "findingIds": [] }, { "type": "screenshot", "path": "evidence/discoverability-rendered.png", "caption": "Homepage rendered with JavaScript", "condition": "JavaScript enabled", "findingIds": [] }, { "type": "screenshot", "path": "evidence/discoverability-crawler.png", "caption": "Homepage rendered without JavaScript", "condition": "JavaScript disabled", "findingIds": [] }, { "type": "lighthouse", "path": "evidence/lighthouse.json", "caption": "Lighthouse performance/accessibility/best-practices/SEO report", "condition": "mobile emulation", "findingIds": [ "F06", "F07", "F08", "F11", "F13", "F14", "F21" ] }, { "type": "other", "path": "evidence/axe-home.json", "caption": "axe-core homepage violations", "condition": "desktop", "findingIds": [ "F08", "F09", "F10" ] }, { "type": "other", "path": "evidence/metadata-structure.json", "caption": "Document metadata, heading and form probe", "condition": "desktop", "findingIds": [ "F08", "F10", "F12", "F14", "F19" ] }, { "type": "other", "path": "evidence/css-focus.json", "caption": "CSS feature and focus probe", "condition": "keyboard focus", "findingIds": [ "F02", "F03" ] }, { "type": "other", "path": "evidence/robots-sitemap-404.json", "caption": "robots.txt, sitemap and 404 HTTP probe", "condition": "network", "findingIds": [ "F14" ] }, { "type": "screenshot", "path": "evidence/forecast-mobile.png", "caption": "Kanto forecast at 360x800", "condition": "viewport: 360x800", "findingIds": [ "F05" ] }, { "type": "layout", "path": "evidence/forecast-layout.json", "caption": "Kanto forecast mobile metrics", "condition": "viewport: 360x800", "findingIds": [] }, { "type": "screenshot", "path": "evidence/radar-mobile.png", "caption": "Radar at 360x800", "condition": "viewport: 360x800", "findingIds": [ "F05" ] }, { "type": "layout", "path": "evidence/radar-layout.json", "caption": "Radar mobile metrics", "condition": "viewport: 360x800", "findingIds": [] }, { "type": "screenshot", "path": "evidence/earthquake-mobile.png", "caption": "Earthquake index at 360x800", "condition": "viewport: 360x800", "findingIds": [] }, { "type": "layout", "path": "evidence/earthquake-layout.json", "caption": "Earthquake mobile metrics", "condition": "viewport: 360x800", "findingIds": [] }, { "type": "screenshot", "path": "evidence/article-mobile.png", "caption": "Forecaster article at 360x800", "condition": "viewport: 360x800", "findingIds": [ "F03", "F04", "F05" ] }, { "type": "layout", "path": "evidence/article-layout.json", "caption": "Article mobile metrics", "condition": "viewport: 360x800", "findingIds": [] }, { "type": "screenshot", "path": "evidence/search-mobile.png", "caption": "Tokyo search results at 360x800", "condition": "viewport: 360x800", "findingIds": [ "F05" ] }, { "type": "layout", "path": "evidence/search-layout.json", "caption": "Search mobile metrics", "condition": "viewport: 360x800", "findingIds": [] }, { "type": "screenshot", "path": "evidence/tokyo-detail-mobile.png", "caption": "Tokyo forecast detail at 360x800", "condition": "viewport: 360x800", "findingIds": [] }, { "type": "discoverability", "path": "evidence/article-discoverability.json", "caption": "Article raw HTML/rendered comparison", "condition": "JavaScript on/off", "findingIds": [] }, { "type": "screenshot", "path": "evidence/article-discoverability-rendered.png", "caption": "Article rendered with JavaScript", "condition": "JavaScript enabled", "findingIds": [] }, { "type": "screenshot", "path": "evidence/article-discoverability-crawler.png", "caption": "Article core content without JavaScript", "condition": "JavaScript disabled", "findingIds": [] }, { "type": "other", "path": "evidence/article-metadata.json", "caption": "Article JSON-LD/Open Graph/time probe", "condition": "desktop", "findingIds": [] }, { "type": "heap", "path": "evidence/heap-baseline.json", "caption": "Homepage baseline compact heap summary", "condition": "baseline", "findingIds": [ "F23" ] }, { "type": "heap", "path": "evidence/heap-post.json", "caption": "Heap summary after ten date-tab interactions", "condition": "post interaction", "findingIds": [ "F23" ] }, { "type": "other", "path": "evidence/memory-metrics.json", "caption": "Heap and DOM metrics around repeated date interactions", "condition": "ten repetitions", "findingIds": [ "F23" ] }, { "type": "screenshot", "path": "evidence/login-mobile.png", "caption": "Authentication entry at 360x800", "condition": "viewport: 360x800", "findingIds": [ "F17" ] }, { "type": "other", "path": "evidence/login-probe.json", "caption": "Authentication field/autocomplete/WebAuthn probe", "condition": "login", "findingIds": [ "F17", "F19" ] }, { "type": "other", "path": "evidence/routes.json", "caption": "Representative route and form discovery", "condition": "desktop", "findingIds": [ "F02", "F14" ] }, { "type": "other", "path": "evidence/recon.json", "caption": "Homepage route/title reconnaissance", "condition": "desktop", "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", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "The dark-mode screenshot is visually identical to the light capture; computed styles report color-scheme: normal and a white body background under prefers-color-scheme: dark.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-dark.png", "evidence/home-dom.json" ], "findingIds": [ "F01" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "status": "pass", "confidence": "high", "method": "evaluate reduced-motion probe", "evidence": "Reduced-motion emulation found zero active animations and no auto-advancing content.", "pathIds": [ "home" ], "artifacts": [ "evidence/reduced-motion.json" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "status": "pass", "confidence": "high", "method": "forced-colors screenshot", "evidence": "Forced-colors/prefers-contrast capture preserved visible text, controls, map labels and focus affordances.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-contrast.png" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "status": "issues", "confidence": "medium", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "CSS inspection found no view-transition rules while the homepage exposes eleven JavaScript date-state links that replace forecast state.", "pathIds": [ "home" ], "artifacts": [ "evidence/css-focus.json", "evidence/routes.json" ], "findingIds": [ "F02" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon.", "evidence": "No scroll-linked animation or scrollytelling surface was present; native scrolling has no scroll-event animation to implement.", "reason": "No scroll-linked animation or scrollytelling surface was present; native scrolling has no scroll-event animation to implement." }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "status": "pass", "confidence": "high", "method": "DOM/CSS and visual interaction review", "evidence": "Representative pages use native scrolling and ordinary links/controls; no custom pointer-drag gesture that fights platform scrolling was observed.", "pathIds": [ "radar" ], "artifacts": [ "evidence/radar-mobile.png", "evidence/css-focus.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "status": "issues", "confidence": "medium", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "The 7,062 CSS-pixel article and other long templates retain static top navigation; CSS inspection found no scroll-state query, progress indicator or scroll timeline.", "pathIds": [ "article" ], "artifacts": [ "evidence/article-mobile.png", "evidence/css-focus.json" ], "findingIds": [ "F03" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon.", "evidence": "No tooltip, transient popover, or edge-positioned menu was present on the representative public paths.", "reason": "No tooltip, transient popover, or edge-positioned menu was present on the representative public paths." }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "status": "pass", "confidence": "high", "method": "visual/DOM review across templates", "evidence": "Breadcrumbs, selected blue navigation tabs, section headings and search-result rows consistently show location and next destination.", "pathIds": [ "search" ], "artifacts": [ "evidence/search-mobile.png", "evidence/article-mobile.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "status": "pass", "confidence": "high", "method": "initial-load screenshots", "evidence": "Initial screenshots on all representative paths show no modal, consent wall or viewport-covering interstitial; content is immediately present.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/article-mobile.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon.", "evidence": "No modal/dialog/disclosure flow or transient overlay was present on load or in the weather lookup journey.", "reason": "No modal/dialog/disclosure flow or transient overlay was present on load or in the weather lookup journey." }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Desktop and article screenshots show background advertising, a right ad rail and dense repeated navigation around the weather/article content; the HAR records extensive ad-tech delivery.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/article-mobile.png", "evidence/home-summary.json" ], "findingIds": [ "F04" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Every tested 360x800 page lacked a viewport meta tag and rendered a 1088–1248 CSS-pixel desktop canvas scaled to 0.29–0.33. Text and controls are miniature across homepage, forecast, radar, earthquake, article and search.", "pathIds": [ "forecast" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-layout-mobile.json", "evidence/forecast-mobile.png", "evidence/radar-mobile.png", "evidence/article-mobile.png", "evidence/search-mobile.png" ], "findingIds": [ "F05" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Every tested 360x800 page lacked a viewport meta tag and rendered a 1088–1248 CSS-pixel desktop canvas scaled to 0.29–0.33. Text and controls are miniature across homepage, forecast, radar, earthquake, article and search.", "pathIds": [ "forecast" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-layout-mobile.json", "evidence/forecast-mobile.png", "evidence/radar-mobile.png", "evidence/article-mobile.png", "evidence/search-mobile.png" ], "findingIds": [ "F05" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Every tested 360x800 page lacked a viewport meta tag and rendered a 1088–1248 CSS-pixel desktop canvas scaled to 0.29–0.33. Text and controls are miniature across homepage, forecast, radar, earthquake, article and search.", "pathIds": [ "forecast" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-layout-mobile.json", "evidence/forecast-mobile.png", "evidence/radar-mobile.png", "evidence/article-mobile.png", "evidence/search-mobile.png" ], "findingIds": [ "F05" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "status": "pass", "confidence": "high", "method": "first-viewport screenshot and heading/link review", "evidence": "The tenki.jp identity, address search and national forecast are immediately visible, and emergency/radar routes have explicit labels.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/recon.json" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Every tested 360x800 page lacked a viewport meta tag and rendered a 1088–1248 CSS-pixel desktop canvas scaled to 0.29–0.33. Text and controls are miniature across homepage, forecast, radar, earthquake, article and search.", "pathIds": [ "forecast" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-layout-mobile.json", "evidence/forecast-mobile.png", "evidence/radar-mobile.png", "evidence/article-mobile.png", "evidence/search-mobile.png" ], "findingIds": [ "F05" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "status": "pass", "confidence": "high", "method": "HTTP fetch plus search screenshot", "evidence": "A nonexistent route returns HTTP 404 with a clear Japanese explanation and prominent TOPへ戻る recovery link; search results are explicit rows.", "pathIds": [ "error404" ], "artifacts": [ "evidence/robots-sitemap-404.json", "evidence/search-mobile.png" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Lighthouse measured LCP 4.64s, TBT 770ms, Speed Index 16.1s and performance 0.47; the independent trace measured LCP 12.50s and four long tasks.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json", "evidence/home-trace-summary.json" ], "findingIds": [ "F06" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "status": "pass", "confidence": "high", "method": "layout shift observer across templates", "evidence": "Observed CLS was 0.009 desktop and 0.018 in mobile emulation, with all representative templates below 0.02.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-layout-desktop.json", "evidence/home-layout-mobile.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Lighthouse measured LCP 4.64s, TBT 770ms, Speed Index 16.1s and performance 0.47; the independent trace measured LCP 12.50s and four long tasks.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json", "evidence/home-trace-summary.json" ], "findingIds": [ "F06" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "HAR: 356 requests and 4.90 MB transferred, including 72 scripts/2.71 MB and 343 third-party requests. Lighthouse estimates 1,562 KiB unused JavaScript and reports render-blocking savings of 2,980ms.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/home.har", "evidence/lighthouse.json" ], "findingIds": [ "F07" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "HAR: 356 requests and 4.90 MB transferred, including 72 scripts/2.71 MB and 343 third-party requests. Lighthouse estimates 1,562 KiB unused JavaScript and reports render-blocking savings of 2,980ms.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/home.har", "evidence/lighthouse.json" ], "findingIds": [ "F07" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "axe found critical image-alt failures on three images, one unnamed member link, and Lighthouse found an unnamed button; the address input has no programmatic label.", "pathIds": [ "home" ], "artifacts": [ "evidence/axe-home.json", "evidence/images.json", "evidence/lighthouse.json", "evidence/metadata-structure.json" ], "findingIds": [ "F08" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "axe reports 44 serious colour-contrast failures and links distinguishable only by colour in text blocks.", "pathIds": [ "home" ], "artifacts": [ "evidence/axe-home.json" ], "findingIds": [ "F09" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "axe found no main landmark, 63 regions outside landmarks, duplicate navigation landmarks, skipped heading order and tabindex=2. The DOM contains an H1 followed by H3 sections.", "pathIds": [ "home" ], "artifacts": [ "evidence/axe-home.json", "evidence/metadata-structure.json" ], "findingIds": [ "F10" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Every tested 360x800 page lacked a viewport meta tag and rendered a 1088–1248 CSS-pixel desktop canvas scaled to 0.29–0.33. Text and controls are miniature across homepage, forecast, radar, earthquake, article and search.", "pathIds": [ "forecast" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-layout-mobile.json", "evidence/forecast-mobile.png", "evidence/radar-mobile.png", "evidence/article-mobile.png", "evidence/search-mobile.png" ], "findingIds": [ "F05" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Every tested 360x800 page lacked a viewport meta tag and rendered a 1088–1248 CSS-pixel desktop canvas scaled to 0.29–0.33. Text and controls are miniature across homepage, forecast, radar, earthquake, article and search.", "pathIds": [ "forecast" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-layout-mobile.json", "evidence/forecast-mobile.png", "evidence/radar-mobile.png", "evidence/article-mobile.png", "evidence/search-mobile.png" ], "findingIds": [ "F05" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Lighthouse errors-in-console audit failed during a clean homepage load.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json" ], "findingIds": [ "F11" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "The images audit found 9 images without dimensions, 10 oversized images and 60 of 66 in legacy formats; doctype and UTF-8 charset were valid.", "pathIds": [ "home" ], "artifacts": [ "evidence/images.json", "evidence/metadata-structure.json" ], "findingIds": [ "F12" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Lighthouse reports two deprecated-API warnings and a failed inspector-issues audit.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse.json" ], "findingIds": [ "F13" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "status": "pass", "confidence": "high", "method": "DOM/evaluate metadata probe", "evidence": "Homepage and article have unique descriptive titles and meta descriptions matching visible content.", "pathIds": [ "article" ], "artifacts": [ "evidence/recon.json", "evidence/article-metadata.json" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "The page has no viewport meta tag and 17 javascript: links; Lighthouse fails crawlable anchors and mobile viewport audits. robots.txt itself is reachable and advertises two sitemap URLs.", "pathIds": [ "home" ], "artifacts": [ "evidence/metadata-structure.json", "evidence/routes.json", "evidence/lighthouse.json", "evidence/robots-sitemap-404.json" ], "findingIds": [ "F14" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "status": "pass", "confidence": "high", "method": "HTTP and metadata probe", "evidence": "Pages returned 200 with self-canonical URLs; robots.txt allows public paths and advertises sitemap_pc.xml and sitemap_lite.xml; 404 pages return 404/noindex.", "pathIds": [ "home" ], "artifacts": [ "evidence/robots-sitemap-404.json", "evidence/article-metadata.json" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "status": "pass", "confidence": "high", "method": "article metadata probe", "evidence": "The article supplies NewsArticle and BreadcrumbList JSON-LD plus complete Open Graph title, description, URL, image and ja_JP locale.", "pathIds": [ "article" ], "artifacts": [ "evidence/article-metadata.json" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "HTTPS, HSTS, nosniff and frame protection are present, but CSP is absent. Cookie inspection found 17 cookies without Secure and many SameSite=None/long-lived analytics identifiers.", "pathIds": [ "home" ], "artifacts": [ "evidence/headers.json", "evidence/cookies.json" ], "findingIds": [ "F15" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Tracker capture found 70 third-party origins and 26 known tracker domains. HAR attributes 343/356 requests and 4.86/4.90 MB to non-main origins, including DoubleClick, Taboola, Meta, TikTok and Clarity.", "pathIds": [ "home" ], "artifacts": [ "evidence/trackers.json", "evidence/home-summary.json" ], "findingIds": [ "F16" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "The login page exposes email and password fields, no passkey/WebAuthn affordance, and the email field has an empty autocomplete token; the OAuth request does use PKCE.", "pathIds": [ "login" ], "artifacts": [ "evidence/login-mobile.png", "evidence/login-probe.json" ], "findingIds": [ "F17" ] }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Permissions-Policy is missing and HSTS max-age is only 300 seconds; Referrer-Policy and X-Frame-Options are present.", "pathIds": [ "home" ], "artifacts": [ "evidence/headers.json" ], "findingIds": [ "F18" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "status": "pass", "confidence": "high", "method": "discoverability raw-HTML/browser comparison", "evidence": "No-JavaScript crawler screenshots retain the forecast shell and the article headline, author, publication time and breadcrumbs; the site is not an empty JS shell.", "pathIds": [ "article" ], "artifacts": [ "evidence/article-discoverability-crawler.png", "evidence/article-discoverability.json" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "status": "pass", "confidence": "high", "method": "layout and repeated-interaction probe", "evidence": "Weather, radar and article templates loaded to stable content; date-tab interaction completed ten repetitions with unchanged DOM node count.", "pathIds": [ "home" ], "artifacts": [ "evidence/memory-metrics.json", "evidence/radar-mobile.png" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon.", "evidence": "Live weather, radar and warning data are intrinsically network-current; offline/installability is not a necessary promise for the audited public website.", "reason": "Live weather, radar and warning data are intrinsically network-current; offline/installability is not a necessary promise for the audited public website." }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "status": "pass", "confidence": "high", "method": "HTTP 404 fetch", "evidence": "The tested invalid URL returns a real 404 page with explanation and a clear route back to the homepage rather than a blank shell.", "pathIds": [ "error404" ], "artifacts": [ "evidence/robots-sitemap-404.json" ] }, { "principleId": "be-internationalised", "checkId": "lang-dir-and-logical-properties", "status": "pass", "confidence": "high", "method": "DOM/CSS probe", "evidence": "The document declares lang=ja, Japanese reading order is correct, and stylesheet inspection found logical inline properties.", "pathIds": [ "home" ], "artifacts": [ "evidence/recon.json", "evidence/css-focus.json" ] }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "status": "pass", "confidence": "high", "method": "visual and DOM review", "evidence": "Dates, weekday labels, temperatures and publication times are rendered in appropriate Japanese forms throughout forecast/article templates.", "pathIds": [ "forecast" ], "artifacts": [ "evidence/forecast-mobile.png", "evidence/article-metadata.json" ] }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "status": "pass", "confidence": "high", "method": "datetime metadata probe", "evidence": "Article timestamps use explicit +09:00 offsets and the UI identifies publication/display time in Japanese local context.", "pathIds": [ "article" ], "artifacts": [ "evidence/article-metadata.json" ] }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "status": "pass", "confidence": "high", "method": "visual journey review", "evidence": "No consent wall, confirmshaming, forced continuity or preselected commercial commitment appeared in the representative weather and login paths.", "pathIds": [ "login" ], "artifacts": [ "evidence/home-desktop.png", "evidence/login-mobile.png" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "status": "pass", "confidence": "high", "method": "form DOM and login visual review", "evidence": "The public search is optional free text with predictable GET results; the login page labels fields and provides a visible password-recovery route rather than premature errors.", "pathIds": [ "login" ], "artifacts": [ "evidence/routes.json", "evidence/login-probe.json" ] }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "The address/postcode search input has no autocomplete token or label; the login email field also has empty autocomplete while only the password has current-password.", "pathIds": [ "search" ], "artifacts": [ "evidence/metadata-structure.json", "evidence/login-probe.json" ], "findingIds": [ "F19" ] }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "status": "pass", "confidence": "high", "method": "authentication entry review", "evidence": "The optional login clearly identifies email/password, links password recovery and terms, and uses an OAuth authorization request with PKCE; no purchase/subscription commitment is present.", "pathIds": [ "login" ], "artifacts": [ "evidence/login-mobile.png", "evidence/login-probe.json" ] }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Images audit: 60/66 legacy-format images, 18 without srcset, 10 oversized and 32 below-fold images not lazy-loaded; one decorative banner transfers 876 KB.", "pathIds": [ "home" ], "artifacts": [ "evidence/images.json", "evidence/home-summary.json" ], "findingIds": [ "F20" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "A single load triggers 134 XHR/fetch requests and 70 third-party origins; Lighthouse records 9.5s main-thread work and 7.0s JavaScript execution.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/trackers.json", "evidence/lighthouse.json" ], "findingIds": [ "F21" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Third-party delivery accounts for 4.86 MB and 343 requests; large ad/recommendation scripts and decorative images surround a comparatively lightweight forecast document.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/home-desktop.png" ], "findingIds": [ "F22" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon.", "evidence": "This is an informational weather publisher with crawlable pages and structured metadata, not a transactional tool surface that needs WebMCP actions.", "reason": "This is an informational weather publisher with crawlable pages and structured metadata, not a transactional tool surface that needs WebMCP actions." }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "status": "not-applicable", "confidence": "high", "method": "Applicability judgement from representative-path recon.", "evidence": "No summarisation or generative task is part of the core weather lookup; on-device inference would add no necessary user value.", "reason": "No summarisation or generative task is part of the core weather lookup; on-device inference would add no necessary user value." }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "status": "pass", "confidence": "high", "method": "baseline/post heap plus repeated-interaction metrics", "evidence": "Ten forecast date-tab activations raised sampled used heap about 1.5 MB but left live DOM elements unchanged at 2,320; separate heap summaries differed about 4.1%, insufficient to establish unbounded retention.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.json", "evidence/heap-post.json", "evidence/memory-metrics.json" ] }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "status": "issues", "confidence": "high", "method": "Active evidence review using the cited browser artifacts and probes.", "evidence": "Baseline heap summary contains 1,456,317 nodes and 73.7 MB self size, including 161,933 closures. After date-tab repetition it reaches 76.7 MB, although DOM count remained stable and this pair did not prove an unbounded leak.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.json", "evidence/heap-post.json", "evidence/memory-metrics.json" ], "findingIds": [ "F23" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "status": "pass", "confidence": "high", "method": "heap constructor comparison and DOM count", "evidence": "Neither compact heap summary surfaced Detached* among top constructors, and repeated date-tab interaction left DOM count unchanged.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.json", "evidence/heap-post.json", "evidence/memory-metrics.json" ] } ], "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F01" ] }, { "principleId": "implement-natural-interactions", "expectation": "default", "status": "issues", "findingIds": [ "F02" ] }, { "principleId": "provide-guided-navigation", "expectation": "default", "status": "issues", "findingIds": [ "F03" ] }, { "principleId": "maximize-content-reduce-noise", "expectation": "default", "status": "issues", "findingIds": [ "F04" ] }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "issues", "findingIds": [ "F05" ] }, { "principleId": "support-core-task-success", "expectation": "default", "status": "issues", "findingIds": [ "F05" ] }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F06", "F07" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "issues", "findingIds": [ "F08", "F09", "F10", "F05" ] }, { "principleId": "follow-best-practices", "expectation": "default", "status": "issues", "findingIds": [ "F11", "F12", "F13" ] }, { "principleId": "be-discoverable", "expectation": "default", "status": "issues", "findingIds": [ "F14" ] }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F15", "F16", "F17", "F18" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "pass" }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "pass" }, { "principleId": "be-trustworthy", "expectation": "default", "status": "issues", "findingIds": [ "F19" ] }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F20", "F21", "F22" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "not-applicable", "reason": "This is an informational weather publisher with crawlable pages and structured metadata, not a transactional tool surface that needs WebMCP actions. No summarisation or generative task is part of the core weather lookup; on-device inference would add no necessary user value." }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "issues", "findingIds": [ "F23" ] } ], "paths": [ { "id": "home", "description": "Public homepage and national forecast overview; represents global chrome, weather discovery and date-tab interaction.", "url": "https://tenki.jp/", "conditions": [ "desktop", "viewport: 360x800", "prefers-color-scheme: dark", "prefers-contrast: more / forced-colors", "prefers-reduced-motion: reduce", "JavaScript disabled" ], "result": "issues" }, { "id": "forecast", "description": "Kanto/Tokyo forecast listing and Tokyo detail; represents the primary local-weather task.", "url": "https://tenki.jp/forecast/3/16/4410/13101/", "conditions": [ "viewport: 360x800" ], "result": "issues" }, { "id": "radar", "description": "Rain radar; represents the map-heavy interactive weather surface.", "url": "https://tenki.jp/radar/", "conditions": [ "viewport: 360x800" ], "result": "issues" }, { "id": "earthquake", "description": "Earthquake index; represents urgent disaster-information listings.", "url": "https://tenki.jp/bousai/earthquake/", "conditions": [ "viewport: 360x800" ], "result": "issues" }, { "id": "article", "description": "Current forecaster article; represents editorial content, metadata and no-JavaScript delivery.", "url": "https://tenki.jp/forecaster/t_yoshida/2026/07/23/39824.html", "conditions": [ "viewport: 360x800", "JavaScript disabled" ], "result": "issues" }, { "id": "search", "description": "Address search for 東京 followed to a Tokyo forecast result; represents the main lookup journey.", "url": "https://tenki.jp/search/?keyword=%E6%9D%B1%E4%BA%AC", "conditions": [ "viewport: 360x800" ], "result": "issues" }, { "id": "login", "description": "Optional external authentication entry; inspected for labels, autocomplete and modern authentication.", "url": "https://auth.tenki.jp/", "conditions": [ "viewport: 360x800" ], "result": "issues" }, { "id": "error404", "description": "Nonexistent route; represents HTTP error recovery.", "url": "https://tenki.jp/not-a-real-page-web-uplift", "conditions": [ "HTTP 404" ], "result": "pass" } ], "findings": [ { "id": "F01", "severity": "medium", "summary": "The site ignores the user’s dark colour-scheme preference.", "principleId": "respect-user-preferences", "principleCheckId": "respects-color-scheme", "guidanceId": "dark-mode", "guidanceCategory": "user-experience", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "The dark-mode screenshot is visually identical to the light capture; computed styles report color-scheme: normal and a white body background under prefers-color-scheme: dark.", "artifacts": [ "evidence/home-dark.png", "evidence/home-dom.json" ], "suggestedFix": "Declare color-scheme: light dark and retint surfaces, text, imagery chrome and form controls with prefers-color-scheme or light-dark().", "effort": "medium" }, { "id": "F02", "severity": "low", "summary": "Interactive date/state changes are abrupt and do not use View Transitions.", "principleId": "implement-natural-interactions", "principleCheckId": "view-transitions", "guidanceId": "same-document-transitions", "guidanceCategory": "user-experience", "pathId": "home", "url": "https://tenki.jp/", "confidence": "medium", "evidence": "CSS inspection found no view-transition rules while the homepage exposes eleven JavaScript date-state links that replace forecast state.", "artifacts": [ "evidence/css-focus.json", "evidence/routes.json" ], "suggestedFix": "Progressively wrap same-document forecast state changes in document.startViewTransition(), with a no-animation fallback and reduced-motion handling.", "effort": "small" }, { "id": "F03", "severity": "low", "summary": "Long pages provide static chrome rather than scroll-state guidance.", "principleId": "provide-guided-navigation", "principleCheckId": "scroll-state-aware-chrome", "guidanceId": "shrinking-header-on-scroll", "guidanceCategory": "user-experience", "pathId": "article", "url": "https://tenki.jp/forecaster/t_yoshida/2026/07/23/39824.html", "confidence": "medium", "evidence": "The 7,062 CSS-pixel article and other long templates retain static top navigation; CSS inspection found no scroll-state query, progress indicator or scroll timeline.", "artifacts": [ "evidence/article-mobile.png", "evidence/css-focus.json" ], "suggestedFix": "Add a lightweight reading/scroll progress cue or compact sticky header using scroll-state/container queries with a safe fallback.", "effort": "small" }, { "id": "F04", "severity": "medium", "summary": "Advertising and duplicated navigation substantially crowd the primary weather content.", "principleId": "maximize-content-reduce-noise", "principleCheckId": "reduced-chrome", "guidanceId": "defer-rendering-heavy-content", "guidanceCategory": "performance", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "Desktop and article screenshots show background advertising, a right ad rail and dense repeated navigation around the weather/article content; the HAR records extensive ad-tech delivery.", "artifacts": [ "evidence/home-desktop.png", "evidence/article-mobile.png", "evidence/home-summary.json" ], "suggestedFix": "Reserve the first viewport for forecast/article content, collapse duplicate navigation, and defer nonessential ad/recommendation modules until near viewport.", "effort": "large" }, { "id": "F05", "severity": "critical", "summary": "Public pages ship a fixed desktop layout to phones, making core weather tasks tiny and difficult to operate.", "principleId": "adapt-to-the-form-factor", "principleCheckId": "responsive-no-horizontal-scroll", "guidanceId": "fluid-scaling", "guidanceCategory": "css", "pathId": "forecast", "url": "https://tenki.jp/forecast/3/16/4410/13101/", "confidence": "high", "evidence": "Every tested 360x800 page lacked a viewport meta tag and rendered a 1088–1248 CSS-pixel desktop canvas scaled to 0.29–0.33. Text and controls are miniature across homepage, forecast, radar, earthquake, article and search.", "artifacts": [ "evidence/home-mobile.png", "evidence/home-layout-mobile.json", "evidence/forecast-mobile.png", "evidence/radar-mobile.png", "evidence/article-mobile.png", "evidence/search-mobile.png" ], "suggestedFix": "Add a scalable width=device-width viewport and rebuild the shared shell/content grids mobile-first with fluid intrinsic sizing, reflowing columns and adequately sized controls; do not disable zoom.", "effort": "large" }, { "id": "F06", "severity": "high", "summary": "The homepage misses fast-load and interaction performance targets.", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "guidanceCategory": "performance", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "Lighthouse measured LCP 4.64s, TBT 770ms, Speed Index 16.1s and performance 0.47; the independent trace measured LCP 12.50s and four long tasks.", "artifacts": [ "evidence/lighthouse.json", "evidence/home-trace-summary.json" ], "suggestedFix": "Prioritise the forecast LCP, delay ads/analytics until after critical content, break up long tasks and validate LCP/INP/CLS under representative mobile throttling.", "effort": "large" }, { "id": "F07", "severity": "high", "summary": "Third-party and unused code dominate resource delivery.", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-resource-delivery", "guidanceId": "optimize-script-priority", "guidanceCategory": "performance", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "HAR: 356 requests and 4.90 MB transferred, including 72 scripts/2.71 MB and 343 third-party requests. Lighthouse estimates 1,562 KiB unused JavaScript and reports render-blocking savings of 2,980ms.", "artifacts": [ "evidence/home-summary.json", "evidence/home.har", "evidence/lighthouse.json" ], "suggestedFix": "Remove redundant vendors, conditionally load nonessential scripts, defer/async confirmed noncritical scripts, shorten dependency chains and set useful cache lifetimes.", "effort": "large" }, { "id": "F08", "severity": "high", "summary": "Interactive and image content lacks accessible names.", "principleId": "be-inclusive", "principleCheckId": "names-roles-labels", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "axe found critical image-alt failures on three images, one unnamed member link, and Lighthouse found an unnamed button; the address input has no programmatic label.", "artifacts": [ "evidence/axe-home.json", "evidence/images.json", "evidence/lighthouse.json", "evidence/metadata-structure.json" ], "suggestedFix": "Provide meaningful alt text or decorative semantics, label the address field, and give every link/button a stable accessible name.", "effort": "small" }, { "id": "F09", "severity": "high", "summary": "Text and links fail minimum contrast requirements.", "principleId": "be-inclusive", "principleCheckId": "sufficient-contrast", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "axe reports 44 serious colour-contrast failures and links distinguishable only by colour in text blocks.", "artifacts": [ "evidence/axe-home.json" ], "suggestedFix": "Adjust foreground/background tokens to WCAG AA and add a non-colour affordance such as underline for inline links.", "effort": "medium" }, { "id": "F10", "severity": "high", "summary": "Landmarks, headings and focus order are structurally inconsistent.", "principleId": "be-inclusive", "principleCheckId": "structure-and-focus", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "axe found no main landmark, 63 regions outside landmarks, duplicate navigation landmarks, skipped heading order and tabindex=2. The DOM contains an H1 followed by H3 sections.", "artifacts": [ "evidence/axe-home.json", "evidence/metadata-structure.json" ], "suggestedFix": "Wrap primary content in main, uniquely label navigation landmarks, use sequential headings, and remove positive tabindex values while preserving visible focus.", "effort": "medium" }, { "id": "F11", "severity": "medium", "summary": "The page logs runtime errors.", "principleId": "follow-best-practices", "principleCheckId": "no-console-errors", "guidanceId": "html", "guidanceCategory": "html", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "Lighthouse errors-in-console audit failed during a clean homepage load.", "artifacts": [ "evidence/lighthouse.json" ], "suggestedFix": "Reproduce the logged errors in DevTools, fix first-party exceptions and isolate or remove failing third-party integrations.", "effort": "medium" }, { "id": "F12", "severity": "medium", "summary": "Document assets are incompletely sized and inefficiently encoded.", "principleId": "follow-best-practices", "principleCheckId": "sound-document-and-assets", "guidanceId": "html", "guidanceCategory": "html", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "The images audit found 9 images without dimensions, 10 oversized images and 60 of 66 in legacy formats; doctype and UTF-8 charset were valid.", "artifacts": [ "evidence/images.json", "evidence/metadata-structure.json" ], "suggestedFix": "Set intrinsic width/height or aspect-ratio, generate right-sized responsive sources and prefer AVIF/WebP where appropriate.", "effort": "medium" }, { "id": "F13", "severity": "medium", "summary": "Deprecated APIs and DevTools inspector issues remain in production.", "principleId": "follow-best-practices", "principleCheckId": "browser-platform-hygiene", "guidanceId": "html", "guidanceCategory": "html", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "Lighthouse reports two deprecated-API warnings and a failed inspector-issues audit.", "artifacts": [ "evidence/lighthouse.json" ], "suggestedFix": "Remove deprecated API usage, resolve Chrome Issues-panel diagnostics and retest BFCache/source-map hygiene.", "effort": "medium" }, { "id": "F14", "severity": "high", "summary": "Mobile and crawler navigation signals contain avoidable defects.", "principleId": "be-discoverable", "principleCheckId": "crawlable-and-mobile-friendly", "guidanceId": "html", "guidanceCategory": "html", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "The page has no viewport meta tag and 17 javascript: links; Lighthouse fails crawlable anchors and mobile viewport audits. robots.txt itself is reachable and advertises two sitemap URLs.", "artifacts": [ "evidence/metadata-structure.json", "evidence/routes.json", "evidence/lighthouse.json", "evidence/robots-sitemap-404.json" ], "suggestedFix": "Use real href URLs for forecast states with click enhancement, add a user-scalable responsive viewport, and preserve descriptive link text.", "effort": "medium" }, { "id": "F15", "severity": "high", "summary": "Security policy and cookie defaults are too weak.", "principleId": "be-private-and-secure", "principleCheckId": "secure-transport-and-headers", "guidanceId": "security", "guidanceCategory": "security", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "HTTPS, HSTS, nosniff and frame protection are present, but CSP is absent. Cookie inspection found 17 cookies without Secure and many SameSite=None/long-lived analytics identifiers.", "artifacts": [ "evidence/headers.json", "evidence/cookies.json" ], "suggestedFix": "Deploy a nonce/hash-based CSP and mark all HTTPS cookies Secure; use Lax/Strict unless cross-site use is essential and shorten analytics retention.", "effort": "large" }, { "id": "F16", "severity": "high", "summary": "The default page load has an excessive tracking and third-party footprint.", "principleId": "be-private-and-secure", "principleCheckId": "data-minimisation-and-third-parties", "guidanceId": "privacy", "guidanceCategory": "privacy", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "Tracker capture found 70 third-party origins and 26 known tracker domains. HAR attributes 343/356 requests and 4.86/4.90 MB to non-main origins, including DoubleClick, Taboola, Meta, TikTok and Clarity.", "artifacts": [ "evidence/trackers.json", "evidence/home-summary.json" ], "suggestedFix": "Establish a strict vendor allowlist, load optional analytics/ads only after meaningful consent or interaction, minimise identifiers and batch necessary telemetry.", "effort": "large" }, { "id": "F17", "severity": "medium", "summary": "Authentication is password-only and misses complete autofill semantics.", "principleId": "be-private-and-secure", "principleCheckId": "in-context-permissions-and-modern-auth", "guidanceId": "passkeys", "guidanceCategory": "authentication", "pathId": "login", "url": "https://auth.tenki.jp/", "confidence": "high", "evidence": "The login page exposes email and password fields, no passkey/WebAuthn affordance, and the email field has an empty autocomplete token; the OAuth request does use PKCE.", "artifacts": [ "evidence/login-mobile.png", "evidence/login-probe.json" ], "suggestedFix": "Offer passkey/WebAuthn sign-in and registration, retain password recovery as fallback, and set username/email plus current-password autocomplete tokens.", "effort": "large" }, { "id": "F18", "severity": "medium", "summary": "Defensive browser policy coverage is incomplete.", "principleId": "be-private-and-secure", "principleCheckId": "defensive-browser-policies", "guidanceId": "security", "guidanceCategory": "security", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "Permissions-Policy is missing and HSTS max-age is only 300 seconds; Referrer-Policy and X-Frame-Options are present.", "artifacts": [ "evidence/headers.json" ], "suggestedFix": "Set a least-privilege Permissions-Policy, lengthen HSTS after rollout confidence, and express frame-ancestors in CSP.", "effort": "small" }, { "id": "F19", "severity": "medium", "summary": "Search and login inputs do not provide complete autocomplete assistance.", "principleId": "be-trustworthy", "principleCheckId": "trustworthy-input-assistance", "guidanceId": "autofill-sign-in-form", "guidanceCategory": "forms", "pathId": "search", "url": "https://tenki.jp/search/", "confidence": "high", "evidence": "The address/postcode search input has no autocomplete token or label; the login email field also has empty autocomplete while only the password has current-password.", "artifacts": [ "evidence/metadata-structure.json", "evidence/login-probe.json" ], "suggestedFix": "Label the search field and add appropriate postal-code/street-address semantics; use username or email and current-password tokens on login.", "effort": "small" }, { "id": "F20", "severity": "medium", "summary": "Images are not consistently optimised for transfer or display size.", "principleId": "be-sustainable", "principleCheckId": "optimised-assets", "guidanceId": "optimize-image-priority", "guidanceCategory": "performance", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "Images audit: 60/66 legacy-format images, 18 without srcset, 10 oversized and 32 below-fold images not lazy-loaded; one decorative banner transfers 876 KB.", "artifacts": [ "evidence/images.json", "evidence/home-summary.json" ], "suggestedFix": "Generate AVIF/WebP responsive sources, choose correct display sizes, lazy-load below-fold media and remove or recompress the 876 KB decorative banner.", "effort": "medium" }, { "id": "F21", "severity": "high", "summary": "Background ad and analytics work is disproportionate to the weather task.", "principleId": "be-sustainable", "principleCheckId": "no-wasteful-work", "guidanceId": "deprioritize-background-fetches", "guidanceCategory": "performance", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "A single load triggers 134 XHR/fetch requests and 70 third-party origins; Lighthouse records 9.5s main-thread work and 7.0s JavaScript execution.", "artifacts": [ "evidence/home-summary.json", "evidence/trackers.json", "evidence/lighthouse.json" ], "suggestedFix": "Stop background vendor work when not visible, conditionally load integrations, coalesce telemetry and prioritise only user-visible weather requests.", "effort": "large" }, { "id": "F22", "severity": "high", "summary": "The third-party and media budget is not proportionate.", "principleId": "be-sustainable", "principleCheckId": "third-party-and-media-budget", "guidanceId": "efficient-background-processing", "guidanceCategory": "performance", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "Third-party delivery accounts for 4.86 MB and 343 requests; large ad/recommendation scripts and decorative images surround a comparatively lightweight forecast document.", "artifacts": [ "evidence/home-summary.json", "evidence/home-desktop.png" ], "suggestedFix": "Set enforceable per-template budgets for third-party requests/bytes and delay or remove vendors and media that do not improve the primary task.", "effort": "large" }, { "id": "F23", "severity": "medium", "summary": "The homepage has a disproportionately large initial memory footprint.", "principleId": "be-memory-efficient", "principleCheckId": "bounded-footprint", "guidanceId": "identify-heavy-scripts", "guidanceCategory": "performance", "pathId": "home", "url": "https://tenki.jp/", "confidence": "high", "evidence": "Baseline heap summary contains 1,456,317 nodes and 73.7 MB self size, including 161,933 closures. After date-tab repetition it reaches 76.7 MB, although DOM count remained stable and this pair did not prove an unbounded leak.", "artifacts": [ "evidence/heap-baseline.json", "evidence/heap-post.json", "evidence/memory-metrics.json" ], "suggestedFix": "Reduce vendor scripts and closure-heavy integrations, lazy-initialise below-fold modules and enforce a retained-heap budget in repeated-interaction tests.", "effort": "large" } ], "taskList": [ { "id": "T01", "title": "Rebuild the shared shell and templates for mobile reflow and zoom", "priority": 1, "findingIds": [ "F05" ], "guidanceId": "fluid-scaling", "status": "open" }, { "id": "T02", "title": "Cut third-party scripts, trackers and background requests", "priority": 2, "findingIds": [ "F06", "F07", "F16", "F21", "F22", "F23" ], "guidanceId": "deprioritize-background-fetches", "status": "open" }, { "id": "T03", "title": "Repair names, landmarks, headings and colour contrast", "priority": 3, "findingIds": [ "F08", "F09", "F10" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T04", "title": "Strengthen CSP, cookies, HSTS and Permissions-Policy", "priority": 4, "findingIds": [ "F15", "F18" ], "guidanceId": "security", "status": "open" }, { "id": "T05", "title": "Optimise and correctly size image delivery", "priority": 5, "findingIds": [ "F12", "F20" ], "guidanceId": "optimize-image-priority", "status": "open" }, { "id": "T06", "title": "Make navigation state crawlable and add valid viewport metadata", "priority": 6, "findingIds": [ "F14" ], "guidanceId": "html", "status": "open" }, { "id": "T07", "title": "Resolve runtime errors, deprecated APIs and inspector issues", "priority": 7, "findingIds": [ "F11", "F13" ], "guidanceId": "html", "status": "open" }, { "id": "T08", "title": "Add passkeys and complete input/autofill semantics", "priority": 8, "findingIds": [ "F17", "F19" ], "guidanceId": "passkeys", "status": "open" }, { "id": "T09", "title": "Respect dark mode and progressively enhance state motion", "priority": 9, "findingIds": [ "F01", "F02", "F03" ], "guidanceId": "dark-mode", "status": "open" }, { "id": "T10", "title": "Reduce ad chrome around primary content", "priority": 10, "findingIds": [ "F04" ], "guidanceId": "defer-rendering-heavy-content", "status": "open" } ], "budget": { "pathCount": 8, "auditPasses": 1 }, "agent": "pi", "runId": "2026-07-23T01-50-30-795Z" }