{ "url": "https://www.ebay.co.uk", "auditedAt": "2026-07-27T00:42:39.241Z", "mode": "report", "status": "completed", "statusDetail": "Coverage-complete representative audit. Search and product-detail paths returned repeatable eBay error pages; those observed failures are judged as issues rather than hidden as blocked audit work.", "page": { "appType": "hybrid", "framework": "Server-rendered Marko-like templates with client enhancement (framework not conclusively fingerprinted)", "notes": "Public UK marketplace. Representative home and category templates rendered; search and item-detail routes failed in fresh sessions. Checkout, signed-in account management, payment, listing creation and post-consent personalization were not covered because they require state, credentials or commitments." }, "evidenceUsed": [ "screenshot", "dom", "evaluate-probe", "layout-metrics", "trace", "har", "discoverability", "headers", "cookies", "trackers", "secrets", "images", "lighthouse", "heap-summary", "robots/sitemap fetch", "Modern Web Guidance search/retrieve" ], "guidanceConsulted": [ "dark-mode", "accessibility", "same-document-transitions", "scroll-entry-exit-effects", "position-aware-tooltips", "light-dismiss-a-dialog", "declarative-dialog-popover-control", "fluid-scaling", "size-aware-styling", "forms", "persistent-toast-notifications", "performance", "break-up-long-tasks", "optimize-image-priority", "identify-heavy-scripts", "html", "security", "privacy", "stabilize-reactive-state", "translator", "passkey-reauthentication", "deliver-optimized-decorative-images", "deprioritize-background-fetches", "agentic-forms", "manage-recurring-intervals" ], "artifacts": [ { "type": "screenshot", "path": "evidence/category-desktop.png", "caption": "category desktop", "findingIds": [ "F002" ] }, { "type": "screenshot", "path": "evidence/category-discoverability-crawler.png", "caption": "category discoverability crawler", "findingIds": [ "F010" ] }, { "type": "screenshot", "path": "evidence/category-discoverability-rendered.png", "caption": "category discoverability rendered", "findingIds": [ "F010" ] }, { "type": "discoverability", "path": "evidence/category-discoverability.json", "caption": "category discoverability", "findingIds": [ "F010", "F016" ] }, { "type": "dom", "path": "evidence/category-recon.json", "caption": "category recon", "findingIds": [] }, { "type": "other", "path": "evidence/cookies.json", "caption": "cookies", "findingIds": [ "F011" ] }, { "type": "other", "path": "evidence/guidance/retrieve-1.md", "caption": "guidance/retrieve 1", "findingIds": [] }, { "type": "other", "path": "evidence/guidance/retrieve-2.md", "caption": "guidance/retrieve 2", "findingIds": [] }, { "type": "other", "path": "evidence/guidance/retrieve-3.md", "caption": "guidance/retrieve 3", "findingIds": [] }, { "type": "other", "path": "evidence/guidance/retrieve-4.md", "caption": "guidance/retrieve 4", "findingIds": [] }, { "type": "other", "path": "evidence/guidance/retrieve-5.md", "caption": "guidance/retrieve 5", "findingIds": [] }, { "type": "other", "path": "evidence/guidance/retrieve-6.md", "caption": "guidance/retrieve 6", "findingIds": [] }, { "type": "other", "path": "evidence/guidance/searches.jsonl", "caption": "guidance/searches", "findingIds": [] }, { "type": "other", "path": "evidence/headers.json", "caption": "headers", "findingIds": [ "F011" ] }, { "type": "heap", "path": "evidence/heap-baseline.json", "caption": "heap baseline", "findingIds": [] }, { "type": "heap", "path": "evidence/heap-post-interaction.json", "caption": "heap post interaction", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-contrast.png", "caption": "home contrast", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-dark.png", "caption": "home dark", "findingIds": [ "F001" ] }, { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "home desktop", "findingIds": [ "F001", "F002" ] }, { "type": "screenshot", "path": "evidence/home-discoverability-crawler.png", "caption": "home discoverability crawler", "findingIds": [ "F010" ] }, { "type": "screenshot", "path": "evidence/home-discoverability-rendered.png", "caption": "home discoverability rendered", "findingIds": [ "F010" ] }, { "type": "discoverability", "path": "evidence/home-discoverability.json", "caption": "home discoverability", "findingIds": [ "F010", "F013", "F016" ] }, { "type": "dom", "path": "evidence/home-dom.json", "caption": "home dom", "findingIds": [] }, { "type": "layout", "path": "evidence/home-layout-mobile.json", "caption": "home layout mobile", "findingIds": [ "F014" ] }, { "type": "screenshot", "path": "evidence/home-mobile.png", "caption": "home mobile", "findingIds": [ "F002" ] }, { "type": "dom", "path": "evidence/home-probe.json", "caption": "home probe", "findingIds": [ "F003", "F013" ] }, { "type": "other", "path": "evidence/home-routes.json", "caption": "home routes", "findingIds": [] }, { "type": "other", "path": "evidence/home-summary.json", "caption": "home summary", "findingIds": [ "F006", "F012" ] }, { "type": "trace-summary", "path": "evidence/home-trace-summary.json", "caption": "home trace summary", "findingIds": [ "F005" ] }, { "type": "trace", "path": "evidence/home-trace.json", "caption": "home trace", "findingIds": [ "F005" ] }, { "type": "har", "path": "evidence/home.har", "caption": "home", "findingIds": [ "F006" ] }, { "type": "other", "path": "evidence/images.json", "caption": "images", "findingIds": [ "F006", "F008", "F012", "F014" ] }, { "type": "lighthouse", "path": "evidence/lighthouse-home.json", "caption": "lighthouse home", "findingIds": [ "F005", "F007", "F009" ] }, { "type": "other", "path": "evidence/lighthouse-summary.json", "caption": "lighthouse summary", "findingIds": [ "F005", "F007", "F009", "F014" ] }, { "type": "other", "path": "evidence/memory-metrics.json", "caption": "memory metrics", "findingIds": [] }, { "type": "screenshot", "path": "evidence/product-desktop.png", "caption": "product desktop", "findingIds": [ "F004", "F015", "F017", "F018" ] }, { "type": "layout", "path": "evidence/product-layout-mobile.json", "caption": "product layout mobile", "findingIds": [] }, { "type": "dom", "path": "evidence/product-recon.json", "caption": "product recon", "findingIds": [ "F004", "F018" ] }, { "type": "dom", "path": "evidence/recon.json", "caption": "recon", "findingIds": [] }, { "type": "other", "path": "evidence/reduced-motion.json", "caption": "reduced motion", "findingIds": [] }, { "type": "other", "path": "evidence/robots.txt", "caption": "robots", "findingIds": [ "F010", "F013" ] }, { "type": "screenshot", "path": "evidence/search-error.png", "caption": "search error", "findingIds": [ "F004", "F015", "F017" ] }, { "type": "dom", "path": "evidence/search-recon.json", "caption": "search recon", "findingIds": [ "F004" ] }, { "type": "other", "path": "evidence/secrets.json", "caption": "secrets", "findingIds": [ "F011" ] }, { "type": "other", "path": "evidence/sitemap.xml", "caption": "sitemap", "findingIds": [] }, { "type": "other", "path": "evidence/trackers.json", "caption": "trackers", "findingIds": [] } ], "config": { "loaded": false }, "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F001" ] }, { "principleId": "implement-natural-interactions", "expectation": "default", "status": "pass" }, { "principleId": "provide-guided-navigation", "expectation": "default", "status": "pass" }, { "principleId": "maximize-content-reduce-noise", "expectation": "default", "status": "issues", "findingIds": [ "F002" ] }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "issues", "findingIds": [ "F003" ] }, { "principleId": "support-core-task-success", "expectation": "default", "status": "issues", "findingIds": [ "F004", "F015" ] }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F005", "F006" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "issues", "findingIds": [ "F008", "F007", "F003" ] }, { "principleId": "follow-best-practices", "expectation": "default", "status": "issues", "findingIds": [ "F009", "F014" ] }, { "principleId": "be-discoverable", "expectation": "default", "status": "issues", "findingIds": [ "F010" ] }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F011" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "issues", "findingIds": [ "F016", "F017" ] }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "pass" }, { "principleId": "be-trustworthy", "expectation": "default", "status": "issues", "findingIds": [ "F015", "F018" ] }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F012", "F006" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "issues", "findingIds": [ "F013" ] }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "pass" } ], "paths": [ { "id": "home", "description": "Homepage entry, global navigation, discovery content, consent, metadata, performance, security and repeated menu interaction.", "url": "https://www.ebay.co.uk/", "conditions": [ "desktop", "viewport 360x800", "prefers-color-scheme: dark", "prefers-reduced-motion: reduce", "prefers-contrast: more", "raw/no-JS crawler" ], "result": "issues" }, { "id": "home-mobile", "description": "Mobile first viewport and responsive global header/consent state.", "url": "https://www.ebay.co.uk/", "conditions": [ "viewport 360x800" ], "result": "issues" }, { "id": "category", "description": "Electronics category template representing browse/listing taxonomy and entity metadata.", "url": "https://www.ebay.co.uk/b/bn_7000259660", "conditions": [ "desktop", "raw/no-JS crawler" ], "result": "issues" }, { "id": "search", "description": "Primary search journey for “laptop”; fresh session returned a generic eBay error.", "url": "https://www.ebay.co.uk/sch/i.html?_nkw=laptop", "conditions": [ "desktop" ], "result": "failed" }, { "id": "product", "description": "Representative promoted item-detail journey; fresh session returned a generic eBay error.", "url": "https://www.ebay.co.uk/itm/336402666366", "conditions": [ "desktop", "viewport 360x800" ], "result": "failed" } ], "findings": [ { "id": "F001", "severity": "medium", "confidence": "high", "principleId": "respect-user-preferences", "principleCheckId": "respects-color-scheme", "guidanceId": "dark-mode", "guidanceCategory": "css", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "The homepage remains light when the user requests a dark colour scheme.", "evidence": "The prefers-color-scheme: dark screenshot is visually identical to the light capture, with white page chrome and surfaces. CSS contains a colour-scheme signal, but it does not produce a usable dark presentation.", "artifacts": [ "evidence/home-dark.png", "evidence/home-desktop.png" ], "suggestedFix": "Apply the dark-mode guidance to surface, text, border, icon and form tokens, declare color-scheme, and verify all templates under prefers-color-scheme: dark.", "effort": "large" }, { "id": "F002", "severity": "high", "confidence": "high", "principleId": "maximize-content-reduce-noise", "principleCheckId": "no-intrusive-interruptions", "guidanceId": "light-dismiss-a-dialog", "guidanceCategory": "user-experience", "pathId": "home-mobile", "url": "https://www.ebay.co.uk/", "summary": "The initial cookie banner obscures most of the mobile first viewport and much of the desktop content.", "evidence": "At 360x800 the fixed blue consent surface covers the content from about y=178 to the bottom, leaving only the header and a fragment of the hero visible. The desktop capture also devotes roughly 300px of 493px to it.", "artifacts": [ "evidence/home-mobile.png", "evidence/home-desktop.png", "evidence/category-desktop.png" ], "suggestedFix": "Use a compact, content-preserving consent surface with equal Accept, Decline and Customize choices; reserve a full dialog only when legally necessary and restore focus after dismissal.", "effort": "medium" }, { "id": "F003", "severity": "medium", "confidence": "high", "principleId": "adapt-to-the-form-factor", "principleCheckId": "input-modality-aware", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "Many navigation controls have touch targets substantially below modern target-size guidance.", "evidence": "The DOM probe found numerous visible links and menu buttons only 13–22 CSS px high, plus a 20x32 message target. Programmatic focus also showed no outline on the search input, although keyboard :focus-visible was not separately captured.", "artifacts": [ "evidence/home-probe.json" ], "suggestedFix": "Increase interactive hit areas to at least 24x24 CSS px and preferably 44x44 for primary mobile controls, preserve spacing, and verify a visible :focus-visible style with a real keyboard focus walk.", "effort": "medium" }, { "id": "F004", "severity": "high", "confidence": "high", "principleId": "support-core-task-success", "principleCheckId": "primary-flow-completion", "guidanceId": "forms", "guidanceCategory": "forms", "pathId": "search", "url": "https://www.ebay.co.uk/sch/i.html?_nkw=laptop", "summary": "Representative search and product-detail journeys terminate in a generic server error.", "evidence": "Fresh navigations to a search results URL and a product URL both rendered “SORRY, Something went wrong on our end” instead of results or item content. The only action is Go to homepage; there is no Retry control.", "artifacts": [ "evidence/search-error.png", "evidence/search-recon.json", "evidence/product-desktop.png", "evidence/product-recon.json" ], "suggestedFix": "Make bot/risk handling distinguish abusive automation from ordinary browser sessions, preserve the attempted destination, and offer a working retry path with a stable incident reference.", "effort": "large" }, { "id": "F005", "severity": "high", "confidence": "high", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "guidanceCategory": "performance", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "The homepage misses the good loading and responsiveness ranges by a wide margin.", "evidence": "Lighthouse measured LCP 12.0s, FCP 3.7s, TBT 1,020ms and TTI 21.6s (performance score 0.40). The first-party trace corroborated a 5.11s LCP and four long tasks.", "artifacts": [ "evidence/lighthouse-home.json", "evidence/lighthouse-summary.json", "evidence/home-trace.json", "evidence/home-trace-summary.json" ], "suggestedFix": "Profile the LCP dependency chain, prioritize the true LCP asset, split long tasks, defer non-critical modules, and remeasure on mobile until LCP and interaction work are in the good range.", "effort": "large" }, { "id": "F006", "severity": "medium", "confidence": "high", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-resource-delivery", "guidanceId": "optimize-image-priority", "guidanceCategory": "performance", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "The initial page ships a heavy resource graph with avoidable image and script cost.", "evidence": "The HAR recorded 110 requests and 3,028,724 transferred bytes: 1.46MB images and 1.22MB scripts. It identified parser-inserted high-priority resources and several individual scripts/images above 100KB.", "artifacts": [ "evidence/home.har", "evidence/home-summary.json", "evidence/images.json" ], "suggestedFix": "Shorten critical dependency chains, defer non-critical scripts, set deliberate image fetch priority, and deliver responsive image candidates sized to their display slots.", "effort": "large" }, { "id": "F007", "severity": "medium", "confidence": "high", "principleId": "be-inclusive", "principleCheckId": "structure-and-focus", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "pathId": "home-mobile", "url": "https://www.ebay.co.uk/", "summary": "The mobile accessibility tree contains focusable controls hidden from assistive technology and lacks a main landmark in the audited state.", "evidence": "Lighthouse/axe reported aria-hidden-focus failures in the mobile header, search field, search button and keyboard trap boundaries, plus landmark-one-main. Accessibility score was 0.94, so these are specific structural defects rather than a blanket failure.", "artifacts": [ "evidence/lighthouse-home.json", "evidence/lighthouse-summary.json" ], "suggestedFix": "Never leave focusable descendants under aria-hidden=true; disable/remove them from tab order while hidden. Ensure exactly one exposed main landmark in every responsive DOM state.", "effort": "medium" }, { "id": "F008", "severity": "medium", "confidence": "high", "principleId": "be-inclusive", "principleCheckId": "names-roles-labels", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "Thirty rendered images have no alt attribute in the homepage image inventory.", "evidence": "The images primitive inspected 80 images and reported missingAlt=30. Some appear decorative or duplicated clickable imagery, but they still need explicit empty alt when decorative or meaningful text when informative.", "artifacts": [ "evidence/images.json" ], "suggestedFix": "Classify every image: provide concise meaningful alt for informative images and alt=\"\" for decorative images, while ensuring linked image names remain discernible.", "effort": "medium" }, { "id": "F009", "severity": "medium", "confidence": "high", "principleId": "follow-best-practices", "principleCheckId": "browser-platform-hygiene", "guidanceId": "html", "guidanceCategory": "html", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "Deprecated unload handling blocks BFCache, and production diagnostics include missing source maps.", "evidence": "Lighthouse found an unload event listener in discoveryplatformweb JS, confirmed BFCache was blocked by an unload handler, and reported missing/404 source maps for large first-party scripts.", "artifacts": [ "evidence/lighthouse-home.json", "evidence/lighthouse-summary.json" ], "suggestedFix": "Remove unload listeners in favor of pagehide/visibilitychange where needed, test BFCache restoration, and publish correct production source maps under an intentional access policy.", "effort": "medium" }, { "id": "F010", "severity": "high", "confidence": "high", "principleId": "be-discoverable", "principleCheckId": "canonical-and-indexing-signals", "guidanceId": "html", "guidanceCategory": "html", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "The non-JavaScript crawler fetch receives an anti-bot challenge shell with almost none of the public page content or metadata.", "evidence": "Discoverability captures for home and category returned HTTP 200 challenge HTML with only 2% content coverage; title, h1 and meta description were absent from raw HTML. The browser eventually rendered the pages, while robots.txt explicitly restricts automated access.", "artifacts": [ "evidence/home-discoverability.json", "evidence/home-discoverability-rendered.png", "evidence/home-discoverability-crawler.png", "evidence/category-discoverability.json", "evidence/category-discoverability-rendered.png", "evidence/category-discoverability-crawler.png", "evidence/robots.txt" ], "suggestedFix": "Serve stable server-rendered title, description, headings and core public content to permitted crawlers, and use explicit 4xx challenge responses rather than a 200 shell when access is denied.", "effort": "large" }, { "id": "F011", "severity": "high", "confidence": "high", "principleId": "be-private-and-secure", "principleCheckId": "secure-transport-and-headers", "guidanceId": "security", "guidanceCategory": "security", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "The main document lacks an enforced CSP and several defensive headers, while numerous cookies are not marked Secure.", "evidence": "The headers primitive found no enforced Content-Security-Policy, Referrer-Policy or Permissions-Policy. The cookie audit found 24 cookies, with many __uz*/bm_* cookies lacking Secure and all reported SameSite=None; no client-side sensitive secret was detected.", "artifacts": [ "evidence/headers.json", "evidence/cookies.json", "evidence/secrets.json" ], "suggestedFix": "Deploy an enforced nonce/hash-based CSP, add a restrictive Referrer-Policy and Permissions-Policy, and mark all HTTPS cookies Secure with the narrowest viable SameSite and HttpOnly settings.", "effort": "large" }, { "id": "F012", "severity": "medium", "confidence": "high", "principleId": "be-sustainable", "principleCheckId": "optimised-assets", "guidanceId": "deliver-optimized-decorative-images", "guidanceCategory": "performance", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "Responsive image delivery wastes bytes despite using modern WebP assets.", "evidence": "Of 80 images, 31 were more than 2x their displayed width, 51 lacked srcset, 79 lacked width/height attributes and 22 below-fold images were not lazy-loaded. The HAR transferred 1.46MB of images.", "artifacts": [ "evidence/images.json", "evidence/home-summary.json" ], "suggestedFix": "Generate width-based WebP/AVIF candidates, add sizes/srcset and intrinsic dimensions, lazy-load below-fold content, and avoid fetching 960px assets into ~245px slots.", "effort": "large" }, { "id": "F013", "severity": "low", "confidence": "high", "principleId": "be-agent-ready", "principleCheckId": "structured-agent-capabilities", "guidanceId": "agentic-forms", "guidanceCategory": "agentic", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "The commerce surface is intentionally closed to browser agents and exposes no page-level structured agent capability.", "evidence": "robots.txt explicitly prohibits LLM-driven and buy-for-me checkout agents and directs approved integrations to the external API. The discoverability probe received a challenge shell, and the DOM probe found no WebMCP/agentic capability surface.", "artifacts": [ "evidence/robots.txt", "evidence/home-discoverability.json", "evidence/home-probe.json" ], "suggestedFix": "Keep checkout human-reviewed, but expose narrowly scoped read-only or reversible WebMCP/agentic form tools for search, item inspection and saved-list actions, backed by the approved API and explicit consent.", "effort": "large" }, { "id": "F014", "severity": "medium", "confidence": "high", "principleId": "follow-best-practices", "principleCheckId": "sound-document-and-assets", "guidanceId": "html", "guidanceCategory": "html", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "Most image elements omit intrinsic width and height.", "evidence": "The image inventory reported 79 of 80 images without width/height attributes. Observed CLS was currently low (0.019–0.022), but intrinsic dimensions remain missing and increase instability risk across dynamic content.", "artifacts": [ "evidence/images.json", "evidence/home-layout-mobile.json", "evidence/lighthouse-summary.json" ], "suggestedFix": "Emit width and height attributes or an equivalent intrinsic aspect ratio for every image candidate while retaining responsive CSS sizing.", "effort": "medium" }, { "id": "F015", "severity": "medium", "confidence": "high", "principleId": "support-core-task-success", "principleCheckId": "clear-system-state-and-recovery", "guidanceId": "persistent-toast-notifications", "guidanceCategory": "user-experience", "pathId": "product", "url": "https://www.ebay.co.uk/itm/336402666366", "summary": "The generic failure state does not preserve context or offer an actionable retry.", "evidence": "Both failed primary paths show an opaque incident code and only “Go to homepage”. The attempted query/item and a Retry action are absent, forcing users to restart.", "artifacts": [ "evidence/product-desktop.png", "evidence/search-error.png" ], "suggestedFix": "Explain the temporary state in plain language, preserve the attempted destination, add Retry and Back controls, and avoid discarding the user’s query or item context.", "effort": "medium" }, { "id": "F016", "severity": "medium", "confidence": "high", "principleId": "be-resilient", "principleCheckId": "progressive-enhancement", "guidanceId": "stabilize-reactive-state", "guidanceCategory": "javascript", "pathId": "home", "url": "https://www.ebay.co.uk/", "summary": "Core public content is not present in the raw response delivered to the audit crawler.", "evidence": "The no-JavaScript/raw comparison found 2% content coverage and no title, h1 or meta description for both home and category; browser rendering required passing a challenge and JavaScript navigation.", "artifacts": [ "evidence/home-discoverability.json", "evidence/category-discoverability.json" ], "suggestedFix": "Return meaningful server-rendered core content and metadata before enhancement, then layer challenge and personalization behavior without replacing the document with an empty 200 shell.", "effort": "large" }, { "id": "F017", "severity": "medium", "confidence": "high", "principleId": "be-resilient", "principleCheckId": "network-and-http-failure-states", "guidanceId": "persistent-toast-notifications", "guidanceCategory": "user-experience", "pathId": "search", "url": "https://www.ebay.co.uk/sch/i.html?_nkw=laptop", "summary": "Search and item failures collapse into a non-recoverable generic page.", "evidence": "Two distinct routes produced the same generic error with no retry, no preserved query/item context and no alternative route besides the homepage.", "artifacts": [ "evidence/search-error.png", "evidence/product-desktop.png" ], "suggestedFix": "Provide route-specific failure states with retry, retained state, support context and safe fallback content instead of replacing the whole journey.", "effort": "medium" }, { "id": "F018", "severity": "medium", "confidence": "high", "principleId": "be-trustworthy", "principleCheckId": "safe-commercial-and-account-flows", "guidanceId": "passkey-reauthentication", "guidanceCategory": "security", "pathId": "product", "url": "https://www.ebay.co.uk/itm/336402666366", "summary": "The unauthenticated commercial journey could not reach item or checkout information in the representative browser session.", "evidence": "The product detail route failed before pricing, seller terms, purchase controls or cancellation/commitment information could be inspected. This is a task-level trust failure for the tested session, not a judgement on unobserved checkout UI.", "artifacts": [ "evidence/product-desktop.png", "evidence/product-recon.json" ], "suggestedFix": "Ensure ordinary browser sessions can inspect item and commitment details before authentication, and provide a recoverable risk challenge rather than a generic dead end.", "effort": "large" } ], "taskList": [ { "id": "T001", "title": "Restore reliable, recoverable search and item-detail journeys", "priority": 1, "findingIds": [ "F004", "F015", "F017", "F018" ], "guidanceId": "persistent-toast-notifications", "status": "open" }, { "id": "T002", "title": "Bring LCP and main-thread work into the good range", "priority": 2, "findingIds": [ "F005", "F006" ], "guidanceId": "performance", "status": "open" }, { "id": "T003", "title": "Enforce CSP and tighten defensive headers and cookie flags", "priority": 3, "findingIds": [ "F011" ], "guidanceId": "security", "status": "open" }, { "id": "T004", "title": "Serve meaningful public content and metadata to permitted non-JS crawlers", "priority": 4, "findingIds": [ "F010", "F016" ], "guidanceId": "html", "status": "open" }, { "id": "T005", "title": "Reduce the first-load consent banner footprint", "priority": 5, "findingIds": [ "F002" ], "guidanceId": "light-dismiss-a-dialog", "status": "open" }, { "id": "T006", "title": "Fix responsive accessibility tree and landmark exposure", "priority": 6, "findingIds": [ "F007", "F008" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T007", "title": "Deliver correctly sized responsive images with intrinsic dimensions", "priority": 7, "findingIds": [ "F012", "F014" ], "guidanceId": "optimize-image-priority", "status": "open" }, { "id": "T008", "title": "Add a complete system-driven dark theme", "priority": 8, "findingIds": [ "F001" ], "guidanceId": "dark-mode", "status": "open" }, { "id": "T009", "title": "Increase small hit targets and verify keyboard focus-visible", "priority": 9, "findingIds": [ "F003" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T010", "title": "Remove unload/BFCache blockers and repair diagnostics", "priority": 10, "findingIds": [ "F009" ], "guidanceId": "html", "status": "open" }, { "id": "T011", "title": "Offer safe structured read-only agent capabilities", "priority": 11, "findingIds": [ "F013" ], "guidanceId": "agentic-forms", "status": "open" } ], "budget": { "pathCount": 5, "auditPasses": 1 }, "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": "medium", "method": "Dark and light screenshot comparison plus CSS signal probe.", "evidence": "Dark emulation leaves the white light presentation unchanged.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-dark.png", "evidence/home-desktop.png" ], "findingIds": [ "F001" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "status": "pass", "confidence": "high", "method": "Emulated prefers-reduced-motion and queried document.getAnimations().", "evidence": "The reduced-motion condition matched and active animation count was 0 after load.", "pathIds": [ "home" ], "artifacts": [ "evidence/reduced-motion.json" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "status": "pass", "confidence": "high", "method": "Captured prefers-contrast: more and checked Lighthouse contrast.", "evidence": "Text and controls remain visible in the high-contrast capture; Lighthouse color-contrast passed.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-contrast.png", "evidence/lighthouse-home.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "status": "pass", "confidence": "medium", "method": "Inspected loaded CSS rules for view-transition usage.", "evidence": "The CSS probe found authored view-transition rules on the interactive homepage.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "status": "pass", "confidence": "medium", "method": "Inspected loaded CSS for animation-timeline/scroll-timeline.", "evidence": "The CSS probe found declarative scroll-timeline signals rather than relying only on scroll event evidence.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "status": "pass", "confidence": "medium", "method": "Inspected loaded CSS for scroll snapping and reduced-motion behavior.", "evidence": "The homepage CSS includes scroll-snap behavior and suppresses animations under reduced motion.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/reduced-motion.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "status": "pass", "confidence": "medium", "method": "Inspected CSS scroll-state/scroll-timeline signals and desktop/mobile screenshots.", "evidence": "Responsive navigation remains oriented and loaded CSS contains declarative scroll timeline/state features.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/home-mobile.png" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "status": "pass", "confidence": "medium", "method": "Inspected loaded CSS for anchor positioning.", "evidence": "The CSS probe found anchor-name/position-anchor usage for positioned UI.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json" ] }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "status": "pass", "confidence": "medium", "method": "Reviewed heading/navigation hierarchy and CSS view-transition/scroll-snap signals.", "evidence": "A skip link, descriptive route links, strong section hierarchy and declarative transition/snap signals guide navigation.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/home-desktop.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "status": "issues", "confidence": "high", "method": "Compared first-load screenshots at desktop and 360x800.", "evidence": "The consent banner obscures most of the mobile viewport and a majority of desktop content.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-desktop.png" ], "findingIds": [ "F002" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "status": "pass", "confidence": "high", "method": "Inspected overlays and consent controls in DOM/screenshot.", "evidence": "Overlay states expose dialog semantics and the consent surface has visible Accept, Decline, Customize and close controls.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/home-desktop.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "status": "issues", "confidence": "high", "method": "Reviewed first viewport content-to-chrome ratio.", "evidence": "On first visit consent chrome dominates the viewport instead of the marketplace content.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-mobile.png", "evidence/home-desktop.png" ], "findingIds": [ "F002" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "status": "pass", "confidence": "high", "method": "Measured layout at 360x800 on home and product/error templates.", "evidence": "Home reported scrollWidth=clientWidth=360, viewport meta present, overflow 0; error template also fit 360px.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-layout-mobile.json", "evidence/product-layout-mobile.json", "evidence/home-mobile.png" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "status": "pass", "confidence": "medium", "method": "Inspected CSS and compared desktop/mobile screenshots.", "evidence": "Loaded CSS contains container-query signals and header/hero composition adapts materially at 360px.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/home-desktop.png", "evidence/home-mobile.png" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "status": "issues", "confidence": "high", "method": "Measured visible interactive rectangles and sampled focus styles.", "evidence": "Many navigation targets are only 13–22px high; the search input focus sample had no outline.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json" ], "findingIds": [ "F003" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "status": "pass", "confidence": "high", "method": "Reviewed homepage and category first viewports, headings and primary controls.", "evidence": "The eBay purpose, search field, category heading and Sell/marketplace actions are immediately identifiable.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/category-desktop.png", "evidence/home-probe.json" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "status": "issues", "confidence": "high", "method": "Navigated representative search and product-detail paths in fresh browser sessions.", "evidence": "Both primary paths returned generic eBay error pages instead of results/detail content.", "pathIds": [ "home" ], "artifacts": [ "evidence/search-error.png", "evidence/product-desktop.png" ], "findingIds": [ "F004" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "status": "issues", "confidence": "high", "method": "Inspected the failed search and product states.", "evidence": "The state says something went wrong but offers only homepage navigation, not retry or preserved context.", "pathIds": [ "home" ], "artifacts": [ "evidence/search-error.png", "evidence/product-desktop.png" ], "findingIds": [ "F015" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "status": "issues", "confidence": "high", "method": "Ran Lighthouse plus a first-party CDP trace and mobile layout observer.", "evidence": "Lighthouse LCP=12.0s, TBT=1020ms; trace LCP=5.11s with four long tasks.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-summary.json", "evidence/home-trace-summary.json" ], "findingIds": [ "F005" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "status": "pass", "confidence": "high", "method": "Measured layout shifts with layout observer and Lighthouse.", "evidence": "Mobile layout CLS was 0.0194 and Lighthouse CLS 0.0218, both in the good range.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-layout-mobile.json", "evidence/lighthouse-summary.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "status": "issues", "confidence": "high", "method": "Measured long tasks and blocking time via trace/Lighthouse.", "evidence": "Lighthouse TBT was 1,020ms and trace found four 66–89ms long tasks.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-trace-summary.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F005" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "status": "issues", "confidence": "high", "method": "Captured HAR, read compact summary, and inspected image delivery.", "evidence": "110 requests transferred 3.03MB with 1.22MB script and 1.46MB images; high-priority parser chains were present.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/images.json" ], "findingIds": [ "F006" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "status": "issues", "confidence": "high", "method": "Reviewed HAR script cost and Lighthouse diagnostics.", "evidence": "Thirty-eight scripts transferred 1.22MB, with individual bundles at 326KB and 289KB; this dominates an already slow load.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/lighthouse-home.json" ], "findingIds": [ "F006" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "status": "issues", "confidence": "high", "method": "Ran Lighthouse accessibility audits, DOM form probe and image inventory.", "evidence": "Controls/forms were generally named, but 30 of 80 image elements lacked alt attributes.", "pathIds": [ "home" ], "artifacts": [ "evidence/images.json", "evidence/lighthouse-home.json", "evidence/home-probe.json" ], "findingIds": [ "F008" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "status": "pass", "confidence": "high", "method": "Ran Lighthouse color-contrast and reviewed high-contrast screenshot.", "evidence": "Lighthouse color-contrast passed and text/control boundaries remain legible under prefers-contrast: more.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-contrast.png" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "status": "issues", "confidence": "high", "method": "Ran Lighthouse/axe structural checks and DOM focus/landmark probes.", "evidence": "The mobile audited state has aria-hidden containers with focusable descendants and no exposed main landmark.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-probe.json" ], "findingIds": [ "F007" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "status": "pass", "confidence": "high", "method": "Reviewed desktop/mobile screenshots and heading hierarchy.", "evidence": "Body and heading text is readable, unclipped and consistently aligned at both viewports.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "status": "issues", "confidence": "high", "method": "Checked viewport zoom policy, 360px reflow, target rectangles and media elements.", "evidence": "Zoom/reflow passed and autoplay was off, but many visible targets were only 13–22px high.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/home-layout-mobile.json", "evidence/lighthouse-home.json" ], "findingIds": [ "F003" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "status": "issues", "confidence": "high", "method": "Ran Lighthouse best-practices console audit.", "evidence": "Console security errors reported ignored upgrade-insecure-requests directives in report-only CSP.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-home.json" ], "findingIds": [ "F009" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "status": "issues", "confidence": "high", "method": "Probed doctype/charset and ran image inventory.", "evidence": "Doctype html and UTF-8 are valid, but 79 of 80 images omit intrinsic dimensions.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/images.json" ], "findingIds": [ "F014" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "status": "issues", "confidence": "high", "method": "Ran Lighthouse deprecation, BFCache and source-map diagnostics.", "evidence": "Unload listeners are deprecated and block BFCache; large first-party source maps are missing or 404.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-home.json" ], "findingIds": [ "F009" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "status": "pass", "confidence": "high", "method": "Read rendered DOM metadata on home and category.", "evidence": "Both templates have unique descriptive titles and meta descriptions.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/category-recon.json" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "status": "pass", "confidence": "high", "method": "Ran Lighthouse SEO, inspected links/viewport and fetched robots.txt.", "evidence": "Lighthouse SEO passed; all 375 sampled anchors had href, viewport meta allows scaling, and robots.txt is syntactically valid.", "pathIds": [ "home" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-probe.json", "evidence/robots.txt" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "status": "issues", "confidence": "high", "method": "Compared raw crawler fetch to rendered DOM and checked canonical/hreflang/robots/sitemap.", "evidence": "Canonical and 44 hreflang links exist rendered, but raw crawler HTML is a 200 challenge shell with 2% content and no title/h1/description.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-discoverability.json", "evidence/category-discoverability.json", "evidence/robots.txt", "evidence/sitemap.xml" ], "findingIds": [ "F010" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "status": "pass", "confidence": "high", "method": "Inspected Open Graph and JSON-LD on representative templates.", "evidence": "Homepage has six Open Graph tags; category has six Open Graph tags and one JSON-LD block matching the Electronics entity.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/category-recon.json" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "status": "issues", "confidence": "high", "method": "Ran headers, cookies, secrets and HAR primitives.", "evidence": "HTTPS/HSTS/nosniff/frame protection pass, but enforced CSP is absent and many cookies lack Secure.", "pathIds": [ "home" ], "artifacts": [ "evidence/headers.json", "evidence/cookies.json", "evidence/secrets.json" ], "findingIds": [ "F011" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "status": "pass", "confidence": "high", "method": "Captured pre-consent tracker inventory and HAR origin/byte summary.", "evidence": "No known tracker domain was observed before consent; visible consent offers equal Decline and Customize choices. Most cross-origin bytes are eBay CDN assets.", "pathIds": [ "home" ], "artifacts": [ "evidence/trackers.json", "evidence/home-summary.json", "evidence/home-desktop.png" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "status": "pass", "confidence": "high", "method": "Inspected first-load UI/Lighthouse for permission prompts and authentication entry points.", "evidence": "No geolocation/notification permission prompt appeared on load; sign-in is user initiated. Auth internals were not exercised.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/lighthouse-home.json" ] }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "status": "issues", "confidence": "high", "method": "Inspected main-document defensive headers and cookie posture.", "evidence": "HSTS and SAMEORIGIN are present, but CSP, Referrer-Policy and Permissions-Policy are absent and cookie flags are overly broad.", "pathIds": [ "home" ], "artifacts": [ "evidence/headers.json", "evidence/cookies.json" ], "findingIds": [ "F011" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "status": "issues", "confidence": "high", "method": "Ran raw-HTML/no-JS discoverability comparisons on home and category.", "evidence": "Both raw responses expose only 2% of rendered content and omit title, h1 and description.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-discoverability.json", "evidence/category-discoverability.json" ], "findingIds": [ "F016" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "status": "pass", "confidence": "medium", "method": "Compared responsive overlays/menu CSS and exercised the My eBay menu repeatedly.", "evidence": "No DOM-count growth or clipped responsive chrome was observed during ten menu toggles; anchor/container CSS signals are present.", "pathIds": [ "home" ], "artifacts": [ "evidence/memory-metrics.json", "evidence/home-probe.json", "evidence/home-mobile.png" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "status": "not-applicable", "confidence": "high", "method": "Judged against commerce-site context and DOM manifest/service-worker probe.", "evidence": "Buying, live inventory and account operations are intrinsically online; offline transaction completion is not a meaningful expectation for this audited public surface.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json" ], "reason": "Buying, live inventory and account operations are intrinsically online; offline transaction completion is not a meaningful expectation for this audited public surface." }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "status": "issues", "confidence": "high", "method": "Navigated search and product URLs that failed in fresh sessions.", "evidence": "Both failures replace the flow with a generic page lacking retry and retained context.", "pathIds": [ "home" ], "artifacts": [ "evidence/search-error.png", "evidence/product-desktop.png" ], "findingIds": [ "F017" ] }, { "principleId": "be-internationalised", "checkId": "lang-dir-and-logical-properties", "status": "pass", "confidence": "medium", "method": "Inspected html language, hreflang and CSS logical-property signals.", "evidence": "html lang=en-GB, 44 hreflang alternatives and logical inline/block CSS signals support localized layouts.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json" ] }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "status": "pass", "confidence": "high", "method": "Reviewed localized UK metadata/content and alternate-locale declarations.", "evidence": "The audited UK template uses en-GB, £ pricing language and extensive hreflang routing rather than locale-neutral copy.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/category-recon.json" ] }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "status": "not-applicable", "confidence": "high", "method": "Reviewed representative static home/category and inaccessible item/search paths for time-zone-sensitive task data.", "evidence": "No user-entered or commitment-critical date/time flow was reachable in the audited public templates, so time-zone arithmetic could not meaningfully apply.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json", "evidence/category-recon.json" ], "reason": "No user-entered or commitment-critical date/time flow was reachable in the audited public templates, so time-zone arithmetic could not meaningfully apply." }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "status": "pass", "confidence": "high", "method": "Reviewed consent and marketplace first-load screenshots.", "evidence": "Consent provides equally prominent Accept all and Decline all plus customization; no confirmshaming or preselected paid continuity was observed.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "status": "issues", "confidence": "high", "method": "Reviewed generic error states reached from search and product navigation.", "evidence": "The failures explain neither recovery timing nor how to retry, and discard useful task context.", "pathIds": [ "home" ], "artifacts": [ "evidence/search-error.png", "evidence/product-desktop.png" ], "findingIds": [ "F015" ] }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "status": "pass", "confidence": "high", "method": "Inspected homepage forms, labels and autocomplete attributes.", "evidence": "Search controls are labelled and use an appropriate search-specific autocomplete-off posture; no address/payment form was exposed on audited routes.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json" ] }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "status": "issues", "confidence": "high", "method": "Attempted representative product-detail journey before authentication.", "evidence": "The product route failed before users could inspect price, commitment or purchase controls.", "pathIds": [ "home" ], "artifacts": [ "evidence/product-desktop.png", "evidence/product-recon.json" ], "findingIds": [ "F018" ] }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "status": "issues", "confidence": "high", "method": "Ran image inventory and HAR byte accounting.", "evidence": "31 images are oversized, 51 lack srcset and image transfer totals 1.46MB.", "pathIds": [ "home" ], "artifacts": [ "evidence/images.json", "evidence/home-summary.json" ], "findingIds": [ "F012" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "status": "issues", "confidence": "high", "method": "Measured long tasks, request count and background/cross-origin activity during load.", "evidence": "The page makes 110 requests and executes 38 scripts with 1,020ms TBT, indicating disproportionate load work before interaction.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/lighthouse-summary.json" ], "findingIds": [ "F006" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "status": "issues", "confidence": "high", "method": "Reviewed HAR origin budget and media/image behavior.", "evidence": "91 cross-origin requests transfer 2.34MB, mostly eBay CDNs; 1.46MB of imagery includes oversized assets. Video elements did not autoplay.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-summary.json", "evidence/home-probe.json" ], "findingIds": [ "F012" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "status": "issues", "confidence": "high", "method": "Inspected robots policy, raw crawler response and DOM capability signals.", "evidence": "LLM/buy-for-me agents are explicitly prohibited and challenged; approved integrations are redirected to an external API, with no page-level WebMCP surface.", "pathIds": [ "home" ], "artifacts": [ "evidence/robots.txt", "evidence/home-discoverability.json", "evidence/home-probe.json" ], "findingIds": [ "F013" ] }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "status": "not-applicable", "confidence": "high", "method": "Judged the representative commerce templates for a concrete on-device inference need.", "evidence": "Search, browsing and purchase inspection do not require an on-device language model or summarizer to remain usable; absence is not a defect.", "pathIds": [ "home" ], "artifacts": [ "evidence/home-probe.json" ], "reason": "Search, browsing and purchase inspection do not require an on-device language model or summarizer to remain usable; absence is not a defect." }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "status": "pass", "confidence": "high", "method": "Repeated My eBay menu open/close ten times and compared DOM/JS heap samples.", "evidence": "DOM element count stayed 2,624; usedJSHeapSize rose about 1.83MB during the bounded exercise with no continuing sample trend established.", "pathIds": [ "home" ], "artifacts": [ "evidence/memory-metrics.json", "evidence/heap-baseline.json", "evidence/heap-post-interaction.json" ] }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "status": "pass", "confidence": "high", "method": "Captured heap summary and compared against page complexity and network footprint.", "evidence": "Baseline heap summary was 539,383 nodes and 46.8MB self size. This is substantial but proportionate to the content-rich marketplace homepage in the captured state.", "pathIds": [ "home" ], "artifacts": [ "evidence/heap-baseline.json", "evidence/home-summary.json" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "status": "pass", "confidence": "high", "method": "Compared stable live DOM count across repeated menu toggles and inspected heap constructor summaries.", "evidence": "The repeated interaction left the live DOM count unchanged and heap summaries did not surface a Detached* constructor among dominant populations.", "pathIds": [ "home" ], "artifacts": [ "evidence/memory-metrics.json", "evidence/heap-baseline.json", "evidence/heap-post-interaction.json" ] } ], "agent": "pi", "runId": "2026-07-27T00-42-39-241Z" }