{ "url": "https://www.amazon.co.uk", "auditedAt": "2026-07-19T14:04:54.798Z", "mode": "report", "status": "completed", "statusDetail": "Atomic coverage complete across 58 checks and six representative public paths. Purchase was not irreversibly submitted; checkout entry and sign-in were inspected.", "page": { "appType": "hybrid", "framework": "Amazon server-rendered templates with client enhancement", "notes": "Large UK commerce site. Coverage includes home, search, product, basket, sign-in entry and error recovery. Account settings, seller tools, Prime Video, order history and post-auth checkout were not covered because they are distinct authenticated/product surfaces and no credentials were provided." }, "evidenceUsed": [ "screenshot", "video", "dom", "evaluate-probe", "layout-metrics", "trace", "har", "discoverability", "headers", "cookies", "trackers", "secrets", "images", "lighthouse", "heap-summary comparison", "robots/sitemap fetch" ], "guidanceConsulted": [ "dark-mode", "accessibility", "same-document-transitions", "scrollytelling", "navigation-drawer", "light-dismiss-a-dialog", "declarative-dialog-popover-control", "fluid-scaling", "size-aware-styling", "forms", "performance", "identify-heavy-scripts", "optimize-image-priority", "html", "security", "privacy", "passkeys", "flicker-free-client-side-ab-testing", "translator", "autofill-payment-form", "deliver-optimized-decorative-images", "webmcp", "manage-recurring-intervals" ], "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": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "The dark-emulated screenshot remains the same white/light catalogue as the normal capture; DOM computed styles report color-scheme: normal and product CSS contains no prefers-color-scheme rule.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-dark.png", "evidence/home-dom.json" ], "findingIds": [ "F01" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "The reduced-motion probe reports 34 running _aXZlL_loadingShimmer animations, each 1500 ms, while matchMedia confirms prefers-reduced-motion: reduce; product CSS has no matching media rule.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/product-reduced-motion.json" ], "findingIds": [ "F02" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Product CSS contains no prefers-contrast or forced-colors rules; controls rely heavily on custom sprite colours. Lighthouse found no ordinary text contrast failure, so this is a preference-support gap rather than a general contrast failure.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/product-dom.json", "evidence/home-lighthouse.json" ], "findingIds": [ "F03" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "DOM/CSS inspection found no view-transition CSS or scroll animation timeline; the add-to-basket screencast produced only two abrupt state frames.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/product-add-to-cart.mp4", "evidence/product-dom.json" ], "findingIds": [ "F04" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "DOM/CSS inspection found no view-transition CSS or scroll animation timeline; the add-to-basket screencast produced only two abrupt state frames.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/product-add-to-cart.mp4", "evidence/product-dom.json" ], "findingIds": [ "F04" ] }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Product CSS contains 10 scroll-snap/overscroll-behavior signals and no custom pointer-move gesture was observed.", "pathIds": [ "home", "search", "product", "cart" ] }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Homepage/product CSS has no @container scroll-state, anchor-name, position-anchor, or position-try signals despite numerous role=dialog/menu surfaces.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-platform-probe.json", "evidence/product-dom.json" ], "findingIds": [ "F05" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Homepage/product CSS has no @container scroll-state, anchor-name, position-anchor, or position-try signals despite numerous role=dialog/menu surfaces.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-platform-probe.json", "evidence/product-dom.json" ], "findingIds": [ "F05" ] }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Search results, product title/price, skip navigation and Add to basket controls provide clear visual and keyboard attention cues.", "pathIds": [ "home", "search", "product", "cart" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Fresh-profile homepage and product screenshots show a fixed consent form covering roughly the lower 40% of a 1000 px viewport. The overlay is dismissible and offers equal Accept/Decline controls, but content is substantially obscured.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-desktop.png", "evidence/product-desktop.png" ], "findingIds": [ "F06" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "The platform probe found 25 role-dialog/aria-modal surfaces but zero dialog and zero popover elements; the consent UI is a fixed form.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-platform-probe.json", "evidence/home-dom.json" ], "findingIds": [ "F07" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Homepage screenshots devote two navigation bars plus multiple full-height promotional rails to chrome; at 360 px the desktop canvas is clipped and adjacent cards remain visible off-screen.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png" ], "findingIds": [ "F08" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "All home/search/product/cart DOM captures report hasViewportMeta=false. At 360x800 the homepage layout reports a 1000 px inner canvas and 640 px horizontal overflow; the screenshot shows clipped desktop navigation and cards.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-mobile-layout.json", "evidence/search-mobile-layout.json", "evidence/product-mobile-layout.json" ], "findingIds": [ "F09" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "DOM/CSS probes found no @container rules, while the same catalogue and product modules remain desktop-sized in narrow captures.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-mobile.png", "evidence/product-dom.json" ], "findingIds": [ "F10" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Lighthouse target-size failed on two groups; the product focus probe counted 19 sub-24 px targets and showed several global links/buttons with outline:none after programmatic focus, including Add to basket shortcuts.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-lighthouse-binary-failures.json", "evidence/product-probe.json" ], "findingIds": [ "F11" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Search clearly labels Results; product exposes title, price, stock and Add to basket; cart clearly explains its empty state.", "pathIds": [ "home", "search", "product", "cart" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Search, product, basket and sign-in entry were reached in sequence; visible controls and stable URLs support discovery through checkout entry without an avoidable dead end before credential entry.", "pathIds": [ "home", "search", "product", "cart" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Empty basket explains state and offers shopping/sign-in choices; invalid product screenshot gives an explicit apology and homepage recovery link.", "pathIds": [ "home", "search", "product", "cart" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Lighthouse performance scored 0.37 with FCP 6.5 s, LCP 15.2 s, TBT 840 ms and TTI 19.1 s. The raw-CDP trace corroborated FCP 4.51 s, LCP 4.57 s and two long tasks.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-lighthouse.json", "evidence/home-lighthouse-failures.json", "evidence/home-trace-summary.json", "evidence/home-trace" ], "findingIds": [ "F12" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Layout observer reported CLS 0 with no recorded shifts; Lighthouse also reports CLS 0.", "pathIds": [ "home", "search", "product", "cart" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Lighthouse performance scored 0.37 with FCP 6.5 s, LCP 15.2 s, TBT 840 ms and TTI 19.1 s. The raw-CDP trace corroborated FCP 4.51 s, LCP 4.57 s and two long tasks.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-lighthouse.json", "evidence/home-lighthouse-failures.json", "evidence/home-trace-summary.json", "evidence/home-trace" ], "findingIds": [ "F12" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "HAR recorded 127 requests and 2.89 MB transferred, including 1.06 MB script, 735 KB fonts, 10 grounded render-blocking candidates, and 2.43 MB from non-main origins; a WAF challenge script alone transferred 591 KB.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home.har", "evidence/home-summary.json" ], "findingIds": [ "F13" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "HAR recorded 127 requests and 2.89 MB transferred, including 1.06 MB script, 735 KB fonts, 10 grounded render-blocking candidates, and 2.43 MB from non-main origins; a WAF challenge script alone transferred 591 KB.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home.har", "evidence/home-summary.json" ], "findingIds": [ "F13" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Lighthouse found aria-allowed-attr, aria-prohibited-attr and label-content-name-mismatch failures; image probes found 2 missing alts on home, 7 on search and 38 on product.", "pathIds": [ "home", "search", "product", "signin" ], "artifacts": [ "evidence/home-lighthouse-binary-failures.json", "evidence/home-images.json", "evidence/search-images.json", "evidence/product-images.json" ], "findingIds": [ "F14" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Lighthouse accessibility scored 0.90 and did not report a colour-contrast failure; screenshots show readable primary text/control contrast.", "pathIds": [ "home", "search", "product", "signin" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Lighthouse reports a malformed agent accessibility tree; focus probing showed multiple visible controls with no outline, and the consent Accept/Decline inputs computed outline:none.", "pathIds": [ "home", "search", "product", "signin" ], "artifacts": [ "evidence/home-lighthouse-binary-failures.json", "evidence/product-probe.json" ], "findingIds": [ "F15" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Desktop search/product screenshots show readable line lengths, hierarchy and unclipped product copy.", "pathIds": [ "home", "search", "product", "signin" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Every representative DOM lacked viewport meta, narrow layouts retained 980–1000 px canvases, and Lighthouse failed target size.", "pathIds": [ "home", "search", "product", "signin" ], "artifacts": [ "evidence/home-mobile-layout.json", "evidence/home-lighthouse-binary-failures.json" ], "findingIds": [ "F16" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Lighthouse errors-in-console failed with one recorded error.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-lighthouse-binary-failures.json" ], "findingIds": [ "F17" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Lighthouse found six incorrect-aspect-ratio instances; image probes found 41/42 home images and 89/100 product images without both dimensions. Doctype and UTF-8 charset pass.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-images.json", "evidence/product-images.json", "evidence/home-lighthouse-binary-failures.json" ], "findingIds": [ "F18" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Lighthouse deprecations failed with two items; browser console errors also occurred.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-lighthouse-binary-failures.json" ], "findingIds": [ "F19" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "DOM metadata summary shows search and cart have no meta description or canonical; search also has no structured/share metadata. Lighthouse reports one non-crawlable anchor.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/dom-metadata-summary.tsv", "evidence/home-lighthouse-binary-failures.json" ], "findingIds": [ "F20" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "DOM metadata summary shows search and cart have no meta description or canonical; search also has no structured/share metadata. Lighthouse reports one non-crawlable anchor.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/dom-metadata-summary.tsv", "evidence/home-lighthouse-binary-failures.json" ], "findingIds": [ "F20" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "DOM metadata summary shows search and cart have no meta description or canonical; search also has no structured/share metadata. Lighthouse reports one non-crawlable anchor.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/dom-metadata-summary.tsv", "evidence/home-lighthouse-binary-failures.json" ], "findingIds": [ "F20" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Product probe found zero JSON-LD and zero Open Graph tags despite a visible named product, price, rating and availability.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/product-probe.json", "evidence/product-dom.json" ], "findingIds": [ "F21" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "HTTPS passes, but the headers primitive found no CSP, HSTS, nosniff, frame protection, Referrer-Policy or Permissions-Policy. Cookie audit found 7/8 cookies insecure and auth-like session-id/session-id-time not HttpOnly.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-headers.json", "evidence/home-cookies.json" ], "findingIds": [ "F22" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Consent copy names 129 third parties. HAR attributes 112/127 requests and 2.43 MB to non-main origins, though the tracker primitive found no known third-party tracker domains and secrets scan found no credentials.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-summary.json", "evidence/home-trackers.json", "evidence/home-secrets.json" ], "findingIds": [ "F23" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "No notification/geolocation prompt appeared on load; sign-in markup includes WebAuthn/passkey support strings and username autocomplete.", "pathIds": [ "home", "search", "product", "cart" ] }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "HTTPS passes, but the headers primitive found no CSP, HSTS, nosniff, frame protection, Referrer-Policy or Permissions-Policy. Cookie audit found 7/8 cookies insecure and auth-like session-id/session-id-time not HttpOnly.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-headers.json", "evidence/home-cookies.json" ], "findingIds": [ "F22" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Discoverability captures report homepage 1% raw/rendered word coverage (HTTP 202) and search 0%, both isJsShell=true; by contrast product content is 96% present, showing the resilient product pattern is achievable.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-discoverability.json", "evidence/home-discoverability-rendered.png", "evidence/home-discoverability-crawler.png", "evidence/search-discoverability.json", "evidence/search-discoverability-rendered.png", "evidence/search-discoverability-crawler.png", "evidence/product-discoverability.json" ], "findingIds": [ "F24" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Consent, search filters, product commerce panel and cart state remained visible and were not cut off in desktop captures.", "pathIds": [ "home", "search", "product", "cart" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Platform probe found an active service-worker controller but no manifest link; no installable identity or offline fallback was exposed on the commerce entry page.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-platform-probe.json" ], "findingIds": [ "F25" ] }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Invalid product path presents a clear, compact error and a working route back to the homepage.", "pathIds": [ "home", "search", "product", "cart" ] }, { "principleId": "be-internationalised", "checkId": "lang-dir-and-logical-properties", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Rendered documents use lang=en-gb and platform probe found logical CSS properties; UK currency/date strings are localized.", "pathIds": [ "home", "search", "product" ] }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Product/search pages consistently render UK pound currency and localized delivery-date phrasing.", "pathIds": [ "home", "search", "product" ] }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "status": "not-applicable", "confidence": "high", "method": "Recon of selected page archetypes and rendered locale-sensitive concepts.", "evidence": "The selected public shopping archetypes expose relative delivery dates but no cross-time-zone event or recurring-time concept to evaluate.", "reason": "The selected public shopping archetypes expose relative delivery dates but no cross-time-zone event or recurring-time concept to evaluate.", "pathIds": [ "home", "search", "product" ] }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Consent gives Accept, Decline and Customise together without confirmshaming; product price, APR disclosure, stock, returns and seller are visible.", "pathIds": [ "product", "cart", "signin", "error" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Invalid URL error is plain-language and actionable; sign-in labels the required identifier before continuation.", "pathIds": [ "product", "cart", "signin", "error" ] }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Sign-in identifier uses autocomplete=username; search has an accessible label and intentionally disables unrelated autofill.", "pathIds": [ "product", "cart", "signin", "error" ] }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Product shows total price, stock, delivery, returns, seller and finance disclosure before purchase; account creation and help are visible at sign-in.", "pathIds": [ "product", "cart", "signin", "error" ] }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Home uses 35 legacy images and 40 images without srcset; product uses 91 legacy images, 51 oversized images and 89 missing dimensions.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-images.json", "evidence/product-images.json" ], "findingIds": [ "F26" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "HAR shows 127 requests/2.89 MB, 24 scripts/1.06 MB and 112 non-main-origin requests; Lighthouse TBT is 840 ms and TTI 19.1 s.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-summary.json", "evidence/home-lighthouse.json" ], "findingIds": [ "F27" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "HAR shows 127 requests/2.89 MB, 24 scripts/1.06 MB and 112 non-main-origin requests; Lighthouse TBT is 840 ms and TTI 19.1 s.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-summary.json", "evidence/home-lighthouse.json" ], "findingIds": [ "F27" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "The public product/search flows are relevant to agents, but the platform probe found no WebMCP surface and Lighthouse found the agent accessibility tree malformed.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-platform-probe.json", "evidence/home-lighthouse-binary-failures.json" ], "findingIds": [ "F28" ] }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "status": "issues", "confidence": "high", "method": "Direct multimodal evidence gathered under the check-specific planned condition; see linked finding.", "evidence": "Chrome exposes LanguageModel and Summarizer globals in the probe, but the page registered no observable on-device summarisation or product-comparison capability.", "pathIds": [ "home", "search", "product", "cart" ], "artifacts": [ "evidence/home-platform-probe.json" ], "findingIds": [ "F29" ] }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "status": "pass", "confidence": "high", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Same-page 10-cycle scroll probe kept DOM nodes exactly 1612 and animations exactly 3; JS heap rose only 4.63%, not evidence of unbounded retained growth.", "pathIds": [ "home" ] }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "status": "pass", "confidence": "medium", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Heap baseline was 393,510 nodes and 23.9 MB self size; proportionate for this complex catalogue page, though optimisation remains desirable.", "pathIds": [ "home" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "status": "pass", "confidence": "medium", "method": "Direct screenshot, DOM/evaluate, Lighthouse, layout, flow-state, security, network, discoverability or memory evidence appropriate to this check.", "evidence": "Across ten same-page scroll cycles DOM nodes and animation count were flat; separate snapshots varied only 1.01% in node count, with no accumulating visible session state.", "pathIds": [ "home" ] } ], "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F01", "F02", "F03" ] }, { "principleId": "implement-natural-interactions", "expectation": "default", "status": "issues", "findingIds": [ "F04" ] }, { "principleId": "provide-guided-navigation", "expectation": "default", "status": "issues", "findingIds": [ "F05" ] }, { "principleId": "maximize-content-reduce-noise", "expectation": "default", "status": "issues", "findingIds": [ "F06", "F07", "F08" ] }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "issues", "findingIds": [ "F09", "F10", "F11" ] }, { "principleId": "support-core-task-success", "expectation": "default", "status": "pass" }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F12", "F13" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "issues", "findingIds": [ "F14", "F15", "F16" ] }, { "principleId": "follow-best-practices", "expectation": "default", "status": "issues", "findingIds": [ "F17", "F18", "F19" ] }, { "principleId": "be-discoverable", "expectation": "default", "status": "issues", "findingIds": [ "F20", "F21" ] }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F22", "F23" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "issues", "findingIds": [ "F24", "F25" ] }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "pass" }, { "principleId": "be-trustworthy", "expectation": "default", "status": "pass" }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F26", "F27" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "issues", "findingIds": [ "F28", "F29" ] }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "pass" } ], "paths": [ { "id": "home", "description": "Homepage and first-visit consent experience, representing discovery and global chrome.", "url": "https://www.amazon.co.uk/", "conditions": [ "desktop", "360x800", "prefers-color-scheme: dark", "no JavaScript crawler", "fresh profile" ], "result": "issues" }, { "id": "search", "description": "Search/listing archetype for the primary product-discovery journey.", "url": "https://www.amazon.co.uk/s?k=headphones", "conditions": [ "desktop", "360x800", "no JavaScript crawler" ], "result": "issues" }, { "id": "product", "description": "Product-detail archetype, pricing, availability, media, and add-to-basket controls.", "url": "https://www.amazon.co.uk/dp/B09B8YWXDF", "conditions": [ "desktop", "360x800", "prefers-reduced-motion: reduce", "keyboard focus", "no JavaScript crawler" ], "result": "issues" }, { "id": "cart", "description": "Basket/checkout entry state and recovery from an empty basket.", "url": "https://www.amazon.co.uk/gp/cart/view.html", "conditions": [ "desktop", "anonymous session" ], "result": "pass" }, { "id": "signin", "description": "Authentication entry reached from basket, inspected for labels, autocomplete and passkey/WebAuthn support.", "url": "https://www.amazon.co.uk/ap/signin?openid.mode=checkid_setup", "conditions": [ "desktop", "anonymous session" ], "result": "pass" }, { "id": "error", "description": "Invalid product URL representing an HTTP/application error recovery state.", "url": "https://www.amazon.co.uk/dp/INVALIDASIN404", "conditions": [ "desktop" ], "result": "pass" } ], "findings": [ { "id": "F01", "severity": "medium", "confidence": "high", "summary": "The experience ignores the user’s dark colour preference.", "evidence": "The dark-emulated screenshot remains the same white/light catalogue as the normal capture; DOM computed styles report color-scheme: normal and product CSS contains no prefers-color-scheme rule.", "artifacts": [ "evidence/home-dark.png", "evidence/home-dom.json" ], "suggestedFix": "Declare color-scheme and provide preference-driven surface/text tokens using prefers-color-scheme or light-dark().", "effort": "medium", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "respect-user-preferences", "principleCheckId": "respects-color-scheme", "guidanceId": "dark-mode", "guidanceCategory": "user-experience" }, { "id": "F02", "severity": "medium", "confidence": "high", "summary": "Loading shimmer motion continues under reduced-motion.", "evidence": "The reduced-motion probe reports 34 running _aXZlL_loadingShimmer animations, each 1500 ms, while matchMedia confirms prefers-reduced-motion: reduce; product CSS has no matching media rule.", "artifacts": [ "evidence/product-reduced-motion.json" ], "suggestedFix": "Disable or replace non-essential shimmer animations inside prefers-reduced-motion: reduce.", "effort": "small", "pathId": "product", "url": "https://www.amazon.co.uk/dp/B09B8YWXDF", "principleId": "respect-user-preferences", "principleCheckId": "respects-reduced-motion", "guidanceId": "accessibility", "guidanceCategory": "accessibility" }, { "id": "F03", "severity": "low", "confidence": "high", "summary": "No explicit high-contrast or forced-colours adaptation is present.", "evidence": "Product CSS contains no prefers-contrast or forced-colors rules; controls rely heavily on custom sprite colours. Lighthouse found no ordinary text contrast failure, so this is a preference-support gap rather than a general contrast failure.", "artifacts": [ "evidence/product-dom.json", "evidence/home-lighthouse.json" ], "suggestedFix": "Add forced-colors and prefers-contrast adaptations for essential custom controls and focus indicators.", "effort": "medium", "pathId": "product", "url": "https://www.amazon.co.uk/dp/B09B8YWXDF", "principleId": "respect-user-preferences", "principleCheckId": "respects-contrast", "guidanceId": "accessibility", "guidanceCategory": "accessibility" }, { "id": "F04", "severity": "low", "confidence": "high", "summary": "State changes do not use modern declarative transition primitives.", "evidence": "DOM/CSS inspection found no view-transition CSS or scroll animation timeline; the add-to-basket screencast produced only two abrupt state frames.", "artifacts": [ "evidence/product-add-to-cart.mp4", "evidence/product-dom.json" ], "suggestedFix": "Use View Transitions for meaningful state changes and CSS animation timelines for genuinely scroll-linked effects, with reduced-motion fallbacks.", "effort": "medium", "pathId": "product", "url": "https://www.amazon.co.uk/dp/B09B8YWXDF", "principleId": "implement-natural-interactions", "principleCheckId": "view-transitions", "guidanceId": "same-document-transitions", "guidanceCategory": "user-experience" }, { "id": "F05", "severity": "low", "confidence": "high", "summary": "Global navigation does not use scroll-state or anchor positioning for contextual chrome.", "evidence": "Homepage/product CSS has no @container scroll-state, anchor-name, position-anchor, or position-try signals despite numerous role=dialog/menu surfaces.", "artifacts": [ "evidence/home-platform-probe.json", "evidence/product-dom.json" ], "suggestedFix": "Progressively enhance sticky chrome with scroll-state queries and attach menus/tooltips with CSS anchor positioning plus fallbacks.", "effort": "medium", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "provide-guided-navigation", "principleCheckId": "scroll-state-aware-chrome", "guidanceId": "navigation-drawer", "guidanceCategory": "user-experience" }, { "id": "F06", "severity": "medium", "confidence": "high", "summary": "The first-visit consent panel obscures a large share of the core page.", "evidence": "Fresh-profile homepage and product screenshots show a fixed consent form covering roughly the lower 40% of a 1000 px viewport. The overlay is dismissible and offers equal Accept/Decline controls, but content is substantially obscured.", "artifacts": [ "evidence/home-desktop.png", "evidence/product-desktop.png" ], "suggestedFix": "Reduce the panel footprint, preserve equal choices, and use a semantic dismissible dialog pattern that keeps context visible.", "effort": "medium", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "maximize-content-reduce-noise", "principleCheckId": "no-intrusive-interruptions", "guidanceId": "light-dismiss-a-dialog", "guidanceCategory": "user-experience" }, { "id": "F07", "severity": "medium", "confidence": "high", "summary": "Overlay infrastructure is largely custom rather than native semantic primitives.", "evidence": "The platform probe found 25 role-dialog/aria-modal surfaces but zero dialog and zero popover elements; the consent UI is a fixed form.", "artifacts": [ "evidence/home-platform-probe.json", "evidence/home-dom.json" ], "suggestedFix": "Migrate modal flows to dialog and transient menus to popover with declarative light-dismiss.", "effort": "large", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "maximize-content-reduce-noise", "principleCheckId": "semantic-dismissible-primitives", "guidanceId": "declarative-dialog-popover-control", "guidanceCategory": "user-experience" }, { "id": "F08", "severity": "high", "confidence": "high", "summary": "Dense global chrome and horizontal card rails crowd primary content.", "evidence": "Homepage screenshots devote two navigation bars plus multiple full-height promotional rails to chrome; at 360 px the desktop canvas is clipped and adjacent cards remain visible off-screen.", "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png" ], "suggestedFix": "Prioritise a compact mobile header and stack or snap content modules so the core task dominates each viewport.", "effort": "large", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "maximize-content-reduce-noise", "principleCheckId": "reduced-chrome", "guidanceId": "navigation-drawer", "guidanceCategory": "user-experience" }, { "id": "F09", "severity": "critical", "confidence": "high", "summary": "Public templates omit the viewport meta tag and render a desktop canvas on phones.", "evidence": "All home/search/product/cart DOM captures report hasViewportMeta=false. At 360x800 the homepage layout reports a 1000 px inner canvas and 640 px horizontal overflow; the screenshot shows clipped desktop navigation and cards.", "artifacts": [ "evidence/home-mobile.png", "evidence/home-mobile-layout.json", "evidence/search-mobile-layout.json", "evidence/product-mobile-layout.json" ], "suggestedFix": "Add a valid width=device-width viewport declaration and rebuild global/header/card layouts with intrinsic fluid sizing and narrow-screen reflow.", "effort": "large", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "adapt-to-the-form-factor", "principleCheckId": "responsive-no-horizontal-scroll", "guidanceId": "fluid-scaling", "guidanceCategory": "user-experience" }, { "id": "F10", "severity": "medium", "confidence": "high", "summary": "Reusable modules do not demonstrate component-level adaptation.", "evidence": "DOM/CSS probes found no @container rules, while the same catalogue and product modules remain desktop-sized in narrow captures.", "artifacts": [ "evidence/home-mobile.png", "evidence/product-dom.json" ], "suggestedFix": "Introduce size containers and container queries for reused cards, nav modules and commerce panels.", "effort": "large", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "adapt-to-the-form-factor", "principleCheckId": "component-level-responsiveness", "guidanceId": "size-aware-styling", "guidanceCategory": "user-experience" }, { "id": "F11", "severity": "high", "confidence": "high", "summary": "Some controls are undersized or lose visible keyboard focus.", "evidence": "Lighthouse target-size failed on two groups; the product focus probe counted 19 sub-24 px targets and showed several global links/buttons with outline:none after programmatic focus, including Add to basket shortcuts.", "artifacts": [ "evidence/home-lighthouse-binary-failures.json", "evidence/product-probe.json" ], "suggestedFix": "Ensure at least 24x24 CSS px targets with spacing and preserve a strong :focus-visible indicator on every interactive control.", "effort": "medium", "pathId": "product", "url": "https://www.amazon.co.uk/dp/B09B8YWXDF", "principleId": "adapt-to-the-form-factor", "principleCheckId": "input-modality-aware", "guidanceId": "accessibility", "guidanceCategory": "accessibility" }, { "id": "F12", "severity": "high", "confidence": "high", "summary": "Cold-load performance is poor.", "evidence": "Lighthouse performance scored 0.37 with FCP 6.5 s, LCP 15.2 s, TBT 840 ms and TTI 19.1 s. The raw-CDP trace corroborated FCP 4.51 s, LCP 4.57 s and two long tasks.", "artifacts": [ "evidence/home-lighthouse.json", "evidence/home-lighthouse-failures.json", "evidence/home-trace-summary.json", "evidence/home-trace" ], "suggestedFix": "Profile the LCP dependency chain, prioritise the LCP asset, and break up/defer non-critical main-thread work.", "effort": "large", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "guidanceCategory": "performance" }, { "id": "F13", "severity": "high", "confidence": "high", "summary": "The load ships a heavy blocking resource graph.", "evidence": "HAR recorded 127 requests and 2.89 MB transferred, including 1.06 MB script, 735 KB fonts, 10 grounded render-blocking candidates, and 2.43 MB from non-main origins; a WAF challenge script alone transferred 591 KB.", "artifacts": [ "evidence/home.har", "evidence/home-summary.json" ], "suggestedFix": "Shorten blocking CSS chains, subset/preload only critical fonts, defer scripts, and conditionally load non-critical dependencies.", "effort": "large", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-resource-delivery", "guidanceId": "identify-heavy-scripts", "guidanceCategory": "performance" }, { "id": "F14", "severity": "medium", "confidence": "high", "summary": "Accessible names and ARIA semantics contain defects.", "evidence": "Lighthouse found aria-allowed-attr, aria-prohibited-attr and label-content-name-mismatch failures; image probes found 2 missing alts on home, 7 on search and 38 on product.", "artifacts": [ "evidence/home-lighthouse-binary-failures.json", "evidence/home-images.json", "evidence/search-images.json", "evidence/product-images.json" ], "suggestedFix": "Correct role/ARIA combinations and accessible names; give meaningful images accurate alt and decorative images empty alt.", "effort": "medium", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "be-inclusive", "principleCheckId": "names-roles-labels", "guidanceId": "accessibility", "guidanceCategory": "accessibility" }, { "id": "F15", "severity": "high", "confidence": "high", "summary": "Keyboard and accessibility-tree quality is inconsistent.", "evidence": "Lighthouse reports a malformed agent accessibility tree; focus probing showed multiple visible controls with no outline, and the consent Accept/Decline inputs computed outline:none.", "artifacts": [ "evidence/home-lighthouse-binary-failures.json", "evidence/product-probe.json" ], "suggestedFix": "Repair tree semantics and apply consistent :focus-visible styling without suppressing native outlines.", "effort": "medium", "pathId": "product", "url": "https://www.amazon.co.uk/dp/B09B8YWXDF", "principleId": "be-inclusive", "principleCheckId": "structure-and-focus", "guidanceId": "accessibility", "guidanceCategory": "accessibility" }, { "id": "F16", "severity": "high", "confidence": "high", "summary": "Zoom/reflow support is undermined by the missing viewport and small targets.", "evidence": "Every representative DOM lacked viewport meta, narrow layouts retained 980–1000 px canvases, and Lighthouse failed target size.", "artifacts": [ "evidence/home-mobile-layout.json", "evidence/home-lighthouse-binary-failures.json" ], "suggestedFix": "Use a scalable viewport, reflow layouts at narrow widths, and enlarge/space touch targets.", "effort": "large", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "be-inclusive", "principleCheckId": "zoom-reflow-targets-and-media", "guidanceId": "accessibility", "guidanceCategory": "accessibility" }, { "id": "F17", "severity": "medium", "confidence": "high", "summary": "The homepage logs browser errors.", "evidence": "Lighthouse errors-in-console failed with one recorded error.", "artifacts": [ "evidence/home-lighthouse-binary-failures.json" ], "suggestedFix": "Remove the underlying runtime/network error or handle the expected failure without emitting a console error.", "effort": "small", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "follow-best-practices", "principleCheckId": "no-console-errors", "guidanceId": "html", "guidanceCategory": "html" }, { "id": "F18", "severity": "medium", "confidence": "high", "summary": "Image and document asset hygiene is inconsistent.", "evidence": "Lighthouse found six incorrect-aspect-ratio instances; image probes found 41/42 home images and 89/100 product images without both dimensions. Doctype and UTF-8 charset pass.", "artifacts": [ "evidence/home-images.json", "evidence/product-images.json", "evidence/home-lighthouse-binary-failures.json" ], "suggestedFix": "Provide intrinsic width/height or aspect-ratio and avoid distorting responsive images.", "effort": "medium", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "follow-best-practices", "principleCheckId": "sound-document-and-assets", "guidanceId": "html", "guidanceCategory": "html" }, { "id": "F19", "severity": "medium", "confidence": "high", "summary": "Deprecated APIs and inspector hygiene failures remain.", "evidence": "Lighthouse deprecations failed with two items; browser console errors also occurred.", "artifacts": [ "evidence/home-lighthouse-binary-failures.json" ], "suggestedFix": "Replace deprecated APIs and keep the page free of DevTools deprecation/console issues.", "effort": "medium", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "follow-best-practices", "principleCheckId": "browser-platform-hygiene", "guidanceId": "html", "guidanceCategory": "html" }, { "id": "F20", "severity": "high", "confidence": "high", "summary": "Search and basket templates omit essential metadata and indexing signals.", "evidence": "DOM metadata summary shows search and cart have no meta description or canonical; search also has no structured/share metadata. Lighthouse reports one non-crawlable anchor.", "artifacts": [ "evidence/dom-metadata-summary.tsv", "evidence/home-lighthouse-binary-failures.json" ], "suggestedFix": "Add unique descriptions and appropriate canonical/indexing signals to public templates and keep navigation anchors crawlable.", "effort": "medium", "pathId": "search", "url": "https://www.amazon.co.uk/s?k=headphones", "principleId": "be-discoverable", "principleCheckId": "title-and-description", "guidanceId": "html", "guidanceCategory": "html" }, { "id": "F21", "severity": "high", "confidence": "high", "summary": "Product entities lack structured and social-preview metadata.", "evidence": "Product probe found zero JSON-LD and zero Open Graph tags despite a visible named product, price, rating and availability.", "artifacts": [ "evidence/product-probe.json", "evidence/product-dom.json" ], "suggestedFix": "Emit accurate schema.org Product/Offer JSON-LD plus Open Graph preview metadata matching visible content.", "effort": "medium", "pathId": "product", "url": "https://www.amazon.co.uk/dp/B09B8YWXDF", "principleId": "be-discoverable", "principleCheckId": "structured-and-shareable-metadata", "guidanceId": "html", "guidanceCategory": "html" }, { "id": "F22", "severity": "high", "confidence": "high", "summary": "Core browser security headers and cookie protections are missing.", "evidence": "HTTPS passes, but the headers primitive found no CSP, HSTS, nosniff, frame protection, Referrer-Policy or Permissions-Policy. Cookie audit found 7/8 cookies insecure and auth-like session-id/session-id-time not HttpOnly.", "artifacts": [ "evidence/home-headers.json", "evidence/home-cookies.json" ], "suggestedFix": "Deploy a tested CSP, HSTS, nosniff, frame-ancestors, Referrer-Policy and Permissions-Policy; mark sensitive cookies Secure, HttpOnly and with the narrowest SameSite.", "effort": "large", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "be-private-and-secure", "principleCheckId": "secure-transport-and-headers", "guidanceId": "security", "guidanceCategory": "security" }, { "id": "F23", "severity": "medium", "confidence": "high", "summary": "The first load has a broad third-party/data-processing footprint.", "evidence": "Consent copy names 129 third parties. HAR attributes 112/127 requests and 2.43 MB to non-main origins, though the tracker primitive found no known third-party tracker domains and secrets scan found no credentials.", "artifacts": [ "evidence/home-desktop.png", "evidence/home-summary.json", "evidence/home-trackers.json", "evidence/home-secrets.json" ], "suggestedFix": "Minimise pre-consent requests, audit each vendor/affiliate origin, and defer optional analytics or advertising until informed consent.", "effort": "large", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "be-private-and-secure", "principleCheckId": "data-minimisation-and-third-parties", "guidanceId": "privacy", "guidanceCategory": "privacy" }, { "id": "F24", "severity": "high", "confidence": "high", "summary": "Homepage and search content collapse for non-JavaScript crawlers.", "evidence": "Discoverability captures report homepage 1% raw/rendered word coverage (HTTP 202) and search 0%, both isJsShell=true; by contrast product content is 96% present, showing the resilient product pattern is achievable.", "artifacts": [ "evidence/home-discoverability.json", "evidence/home-discoverability-rendered.png", "evidence/home-discoverability-crawler.png", "evidence/search-discoverability.json", "evidence/search-discoverability-rendered.png", "evidence/search-discoverability-crawler.png", "evidence/product-discoverability.json" ], "suggestedFix": "Server-render meaningful homepage/search content and crawlable links, then progressively enhance interactivity.", "effort": "large", "pathId": "search", "url": "https://www.amazon.co.uk/s?k=headphones", "principleId": "be-resilient", "principleCheckId": "progressive-enhancement", "guidanceId": "flicker-free-client-side-ab-testing", "guidanceCategory": "user-experience" }, { "id": "F25", "severity": "medium", "confidence": "high", "summary": "No installable/offline product surface was exposed.", "evidence": "Platform probe found an active service-worker controller but no manifest link; no installable identity or offline fallback was exposed on the commerce entry page.", "artifacts": [ "evidence/home-platform-probe.json" ], "suggestedFix": "Provide a manifest and intentional offline/failure fallback for app-like shopping surfaces, or explicitly scope this capability out.", "effort": "medium", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "be-resilient", "principleCheckId": "offline-and-installable", "guidanceId": "flicker-free-client-side-ab-testing", "guidanceCategory": "user-experience" }, { "id": "F26", "severity": "high", "confidence": "high", "summary": "Image delivery is wasteful across key templates.", "evidence": "Home uses 35 legacy images and 40 images without srcset; product uses 91 legacy images, 51 oversized images and 89 missing dimensions.", "artifacts": [ "evidence/home-images.json", "evidence/product-images.json" ], "suggestedFix": "Serve AVIF/WebP where useful, right-size sources with srcset/sizes, reserve dimensions and lazy-load below-fold media.", "effort": "large", "pathId": "product", "url": "https://www.amazon.co.uk/dp/B09B8YWXDF", "principleId": "be-sustainable", "principleCheckId": "optimised-assets", "guidanceId": "deliver-optimized-decorative-images", "guidanceCategory": "user-experience" }, { "id": "F27", "severity": "high", "confidence": "high", "summary": "Background and third-party work exceeds a proportionate first-load budget.", "evidence": "HAR shows 127 requests/2.89 MB, 24 scripts/1.06 MB and 112 non-main-origin requests; Lighthouse TBT is 840 ms and TTI 19.1 s.", "artifacts": [ "evidence/home-summary.json", "evidence/home-lighthouse.json" ], "suggestedFix": "Set per-template budgets, conditionally load optional code, and deprioritise background fetch/analytics.", "effort": "large", "pathId": "home", "url": "https://www.amazon.co.uk/", "principleId": "be-sustainable", "principleCheckId": "no-wasteful-work", "guidanceId": "identify-heavy-scripts", "guidanceCategory": "performance" }, { "id": "F28", "severity": "low", "confidence": "high", "summary": "Agentic commerce capabilities are not exposed as structured tools.", "evidence": "The public product/search flows are relevant to agents, but the platform probe found no WebMCP surface and Lighthouse found the agent accessibility tree malformed.", "artifacts": [ "evidence/home-platform-probe.json", "evidence/home-lighthouse-binary-failures.json" ], "suggestedFix": "Pilot narrow, safe WebMCP tools or agentic forms for search, product facts and basket actions with explicit confirmation.", "effort": "large", "pathId": "product", "url": "https://www.amazon.co.uk/dp/B09B8YWXDF", "principleId": "be-agent-ready", "principleCheckId": "structured-agent-capabilities", "guidanceId": "webmcp", "guidanceCategory": "webmcp" }, { "id": "F29", "severity": "low", "confidence": "high", "summary": "No page-owned on-device inference enhancement was observed.", "evidence": "Chrome exposes LanguageModel and Summarizer globals in the probe, but the page registered no observable on-device summarisation or product-comparison capability.", "artifacts": [ "evidence/home-platform-probe.json" ], "suggestedFix": "Treat this as an opportunity: evaluate private on-device summarisation/comparison only where it improves the shopping task and has a non-AI fallback.", "effort": "large", "pathId": "product", "url": "https://www.amazon.co.uk/dp/B09B8YWXDF", "principleId": "be-agent-ready", "principleCheckId": "on-device-inference", "guidanceId": "translator", "guidanceCategory": "built-in-ai" } ], "taskList": [ { "id": "T01", "title": "Restore true mobile reflow and target/focus usability", "priority": 1, "findingIds": [ "F09", "F10", "F11", "F16" ], "guidanceId": "fluid-scaling", "status": "open" }, { "id": "T02", "title": "Reduce LCP, blocking code and first-load network cost", "priority": 2, "findingIds": [ "F12", "F13", "F27" ], "guidanceId": "performance", "status": "open" }, { "id": "T03", "title": "Harden response headers and cookie attributes", "priority": 3, "findingIds": [ "F22" ], "guidanceId": "security", "status": "open" }, { "id": "T04", "title": "Server-render homepage and search content", "priority": 4, "findingIds": [ "F20", "F24" ], "guidanceId": "flicker-free-client-side-ab-testing", "status": "open" }, { "id": "T05", "title": "Fix ARIA, accessible names, focus and image alternatives", "priority": 5, "findingIds": [ "F14", "F15" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T06", "title": "Optimise and dimension responsive images", "priority": 6, "findingIds": [ "F18", "F26" ], "guidanceId": "deliver-optimized-decorative-images", "status": "open" }, { "id": "T07", "title": "Reduce and semantically implement the consent interruption", "priority": 7, "findingIds": [ "F06", "F07" ], "guidanceId": "light-dismiss-a-dialog", "status": "open" }, { "id": "T08", "title": "Add dark, reduced-motion and forced-colour preference support", "priority": 8, "findingIds": [ "F01", "F02", "F03" ], "guidanceId": "dark-mode", "status": "open" }, { "id": "T09", "title": "Add product structured/share metadata", "priority": 9, "findingIds": [ "F21" ], "guidanceId": "html", "status": "open" }, { "id": "T10", "title": "Clean console/deprecation/platform hygiene", "priority": 10, "findingIds": [ "F17", "F19" ], "guidanceId": "html", "status": "open" }, { "id": "T11", "title": "Minimise pre-consent and non-main-origin data flows", "priority": 11, "findingIds": [ "F23" ], "guidanceId": "privacy", "status": "open" }, { "id": "T12", "title": "Pilot safe structured agent capabilities", "priority": 12, "findingIds": [ "F28", "F29" ], "guidanceId": "webmcp", "status": "open" }, { "id": "T13", "title": "Progressively adopt declarative navigation and transitions", "priority": 13, "findingIds": [ "F04", "F05" ], "guidanceId": "same-document-transitions", "status": "open" }, { "id": "T14", "title": "Reduce chrome density on primary surfaces", "priority": 14, "findingIds": [ "F08" ], "guidanceId": "navigation-drawer", "status": "open" }, { "id": "T15", "title": "Add manifest and intentional offline fallback", "priority": 15, "findingIds": [ "F25" ], "guidanceId": "flicker-free-client-side-ab-testing", "status": "open" } ], "artifacts": [ { "type": "dom", "path": "evidence/cart-dom.json", "caption": "cart dom", "findingIds": [] }, { "type": "screenshot", "path": "evidence/cart.png", "caption": "cart", "findingIds": [] }, { "type": "dom", "path": "evidence/dom-metadata-summary.tsv", "caption": "dom metadata summary", "findingIds": [ "F20" ] }, { "type": "screenshot", "path": "evidence/error-state.png", "caption": "error state", "findingIds": [] }, { "type": "other", "path": "evidence/home-cookies.json", "caption": "home cookies", "findingIds": [ "F22" ] }, { "type": "screenshot", "path": "evidence/home-dark.png", "caption": "home dark", "condition": "prefers-color-scheme: dark", "findingIds": [ "F01" ] }, { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "home desktop", "findingIds": [ "F06", "F08", "F23" ] }, { "type": "screenshot", "path": "evidence/home-discoverability-crawler.png", "caption": "home discoverability crawler", "findingIds": [ "F24" ] }, { "type": "screenshot", "path": "evidence/home-discoverability-rendered.png", "caption": "home discoverability rendered", "findingIds": [ "F24" ] }, { "type": "discoverability", "path": "evidence/home-discoverability.json", "caption": "home discoverability", "findingIds": [ "F24" ] }, { "type": "dom", "path": "evidence/home-dom.json", "caption": "home dom", "findingIds": [ "F01", "F07" ] }, { "type": "other", "path": "evidence/home-headers.json", "caption": "home headers", "findingIds": [ "F22" ] }, { "type": "heap", "path": "evidence/home-heap-comparison.json", "caption": "home heap comparison", "findingIds": [] }, { "type": "other", "path": "evidence/home-images.json", "caption": "home images", "findingIds": [ "F14", "F18", "F26" ] }, { "type": "lighthouse", "path": "evidence/home-lighthouse-binary-failures.json", "caption": "home lighthouse binary failures", "findingIds": [ "F11", "F14", "F15", "F16", "F17", "F18", "F19", "F20", "F28" ] }, { "type": "lighthouse", "path": "evidence/home-lighthouse-failures.json", "caption": "home lighthouse failures", "findingIds": [ "F12" ] }, { "type": "lighthouse", "path": "evidence/home-lighthouse.json", "caption": "home lighthouse", "findingIds": [ "F03", "F12", "F27" ] }, { "type": "heap", "path": "evidence/home-memory-metrics.json", "caption": "home memory metrics", "findingIds": [] }, { "type": "layout", "path": "evidence/home-mobile-layout.json", "caption": "home mobile layout", "condition": "viewport: 360x800", "findingIds": [ "F09", "F16" ] }, { "type": "screenshot", "path": "evidence/home-mobile.png", "caption": "home mobile", "condition": "viewport: 360x800", "findingIds": [ "F08", "F09", "F10" ] }, { "type": "dom", "path": "evidence/home-platform-probe.json", "caption": "home platform probe", "findingIds": [ "F05", "F07", "F25", "F28", "F29" ] }, { "type": "other", "path": "evidence/home-recon.json", "caption": "home recon", "findingIds": [] }, { "type": "other", "path": "evidence/home-secrets.json", "caption": "home secrets", "findingIds": [ "F23" ] }, { "type": "har-summary", "path": "evidence/home-summary.json", "caption": "home summary", "findingIds": [ "F13", "F23", "F27" ] }, { "type": "trace", "path": "evidence/home-trace", "caption": "home trace", "findingIds": [ "F12" ] }, { "type": "trace-summary", "path": "evidence/home-trace-summary.json", "caption": "home trace summary", "findingIds": [ "F12" ] }, { "type": "other", "path": "evidence/home-trackers.json", "caption": "home trackers", "findingIds": [ "F23" ] }, { "type": "har", "path": "evidence/home.har", "caption": "home", "findingIds": [ "F13" ] }, { "type": "video", "path": "evidence/product-add-to-cart.mp4", "caption": "product add to cart", "findingIds": [ "F04" ] }, { "type": "screenshot", "path": "evidence/product-add-to-cart.png", "caption": "product add to cart", "findingIds": [] }, { "type": "screenshot", "path": "evidence/product-desktop.png", "caption": "product desktop", "findingIds": [ "F06" ] }, { "type": "screenshot", "path": "evidence/product-discoverability-crawler.png", "caption": "product discoverability crawler", "findingIds": [] }, { "type": "screenshot", "path": "evidence/product-discoverability-rendered.png", "caption": "product discoverability rendered", "findingIds": [] }, { "type": "discoverability", "path": "evidence/product-discoverability.json", "caption": "product discoverability", "findingIds": [ "F24" ] }, { "type": "dom", "path": "evidence/product-dom.json", "caption": "product dom", "findingIds": [ "F03", "F04", "F05", "F10", "F21" ] }, { "type": "other", "path": "evidence/product-images.json", "caption": "product images", "findingIds": [ "F14", "F18", "F26" ] }, { "type": "layout", "path": "evidence/product-mobile-layout.json", "caption": "product mobile layout", "condition": "viewport: 360x800", "findingIds": [ "F09" ] }, { "type": "dom", "path": "evidence/product-probe.json", "caption": "product probe", "findingIds": [ "F11", "F15", "F21" ] }, { "type": "other", "path": "evidence/product-reduced-motion.json", "caption": "product reduced motion", "condition": "prefers-reduced-motion: reduce", "findingIds": [ "F02" ] }, { "type": "other", "path": "evidence/robots-headers.txt", "caption": "robots headers", "findingIds": [] }, { "type": "other", "path": "evidence/robots.txt", "caption": "robots", "findingIds": [] }, { "type": "screenshot", "path": "evidence/search-add-to-cart.png", "caption": "search add to cart", "findingIds": [] }, { "type": "screenshot", "path": "evidence/search-desktop.png", "caption": "search desktop", "findingIds": [] }, { "type": "screenshot", "path": "evidence/search-discoverability-crawler.png", "caption": "search discoverability crawler", "findingIds": [ "F24" ] }, { "type": "screenshot", "path": "evidence/search-discoverability-rendered.png", "caption": "search discoverability rendered", "findingIds": [ "F24" ] }, { "type": "discoverability", "path": "evidence/search-discoverability.json", "caption": "search discoverability", "findingIds": [ "F24" ] }, { "type": "dom", "path": "evidence/search-dom.json", "caption": "search dom", "findingIds": [] }, { "type": "other", "path": "evidence/search-images.json", "caption": "search images", "findingIds": [ "F14" ] }, { "type": "layout", "path": "evidence/search-mobile-layout.json", "caption": "search mobile layout", "condition": "viewport: 360x800", "findingIds": [ "F09" ] }, { "type": "dom", "path": "evidence/signin-dom.json", "caption": "signin dom", "findingIds": [] }, { "type": "screenshot", "path": "evidence/signin.png", "caption": "signin", "findingIds": [] }, { "type": "other", "path": "evidence/sitemap.xml", "caption": "sitemap", "findingIds": [] } ], "budget": { "pathCount": 6, "auditPasses": 1 }, "agent": "pi", "runId": "2026-07-19T14-04-54-798Z" }