{ "url": "https://telegram.org", "auditedAt": "2026-07-22T02:23:09.855Z", "mode": "report", "status": "completed", "statusDetail": "Coverage-complete audit of six representative public paths. Excluded: individual localized duplicates and every historical article because they share audited templates; linked external app sites and core.telegram.org are separate origins/products.", "page": { "appType": "mpa", "framework": "Server-rendered multi-page site with Bootstrap-style CSS and small first-party scripts", "notes": "Public marketing, download, support, news, and safety reference site. No local target config was applicable." }, "evidenceUsed": [ "screenshot", "video", "dom", "evaluate-probe", "layout-metrics", "trace", "har", "discoverability", "headers", "cookies", "trackers", "secrets", "images", "heap-summary", "Lighthouse", "curl HTTP status" ], "guidanceConsulted": [ "accessibility", "privacy", "security", "performance", "dark-mode", "forms", "html", "css", "fluid-scaling", "improve-text-layout-and-legibility", "optimize-image-priority", "webmcp", "manage-recurring-intervals", "accessible-error-announcement", "persistent-toast-notifications", "stabilize-reactive-state", "declarative-dialog-popover-control", "visually-stable-font-fallbacks", "deliver-optimized-decorative-images", "validate-input-after-interaction" ], "artifacts": [ { "type": "dom", "path": "evidence/404-dom.json", "caption": "Audit evidence: 404-dom.json", "findingIds": [ "F04" ] }, { "type": "screenshot", "path": "evidence/404.png", "caption": "Audit evidence: 404.png", "findingIds": [ "F04", "F11" ] }, { "type": "dom", "path": "evidence/apps-dom.json", "caption": "Audit evidence: apps-dom.json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/apps-mobile.png", "caption": "Audit evidence: apps-mobile.png", "findingIds": [] }, { "type": "dom", "path": "evidence/article-dom.json", "caption": "Audit evidence: article-dom.json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/article-mobile.png", "caption": "Audit evidence: article-mobile.png", "findingIds": [] }, { "type": "other", "path": "evidence/cookies.json", "caption": "Audit evidence: cookies.json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/discoverability-crawler.png", "caption": "Audit evidence: discoverability-crawler.png", "findingIds": [] }, { "type": "screenshot", "path": "evidence/discoverability-rendered.png", "caption": "Audit evidence: discoverability-rendered.png", "findingIds": [] }, { "type": "discoverability", "path": "evidence/discoverability.json", "caption": "Audit evidence: discoverability.json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/faq-desktop.png", "caption": "Audit evidence: faq-desktop.png", "findingIds": [] }, { "type": "dom", "path": "evidence/faq-dom.json", "caption": "Audit evidence: faq-dom.json", "findingIds": [] }, { "type": "other", "path": "evidence/focus-target-probe.json", "caption": "Audit evidence: focus-target-probe.json", "findingIds": [ "F03", "F08" ] }, { "type": "other", "path": "evidence/headers.json", "caption": "Audit evidence: headers.json", "findingIds": [ "F12" ] }, { "type": "heap", "path": "evidence/heap-baseline.json", "caption": "Audit evidence: heap-baseline.json", "findingIds": [] }, { "type": "heap", "path": "evidence/heap-post.json", "caption": "Audit evidence: heap-post.json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-dark.png", "caption": "Audit evidence: home-dark.png", "findingIds": [ "F01" ] }, { "type": "screenshot", "path": "evidence/home-desktop.png", "caption": "Audit evidence: home-desktop.png", "findingIds": [ "F07" ] }, { "type": "dom", "path": "evidence/home-dom.json", "caption": "Audit evidence: home-dom.json", "findingIds": [ "F03" ] }, { "type": "layout", "path": "evidence/home-mobile-layout.json", "caption": "Audit evidence: home-mobile-layout.json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/home-mobile.png", "caption": "Audit evidence: home-mobile.png", "findingIds": [] }, { "type": "other", "path": "evidence/home-summary.json", "caption": "Audit evidence: home-summary.json", "findingIds": [ "F09", "F15" ] }, { "type": "trace-summary", "path": "evidence/home-trace-summary.json", "caption": "Audit evidence: home-trace-summary.json", "findingIds": [ "F05" ] }, { "type": "trace", "path": "evidence/home-trace.json", "caption": "Audit evidence: home-trace.json", "findingIds": [] }, { "type": "har", "path": "evidence/home.har", "caption": "Audit evidence: home.har", "findingIds": [ "F09" ] }, { "type": "other", "path": "evidence/images.json", "caption": "Audit evidence: images.json", "findingIds": [ "F06", "F09" ] }, { "type": "lighthouse", "path": "evidence/lighthouse-home.json", "caption": "Audit evidence: lighthouse-home.json", "findingIds": [ "F05", "F06", "F07", "F08", "F10", "F15" ] }, { "type": "other", "path": "evidence/preferences-probe.json", "caption": "Audit evidence: preferences-probe.json", "findingIds": [ "F01", "F02" ] }, { "type": "other", "path": "evidence/probe-apps.json", "caption": "Audit evidence: probe-apps.json", "findingIds": [] }, { "type": "other", "path": "evidence/probe-blog-communities-editor-invisible-messages.json", "caption": "Audit evidence: probe-blog-communities-editor-invisible-messages.json", "findingIds": [ "F10", "F16" ] }, { "type": "other", "path": "evidence/probe-faq.json", "caption": "Audit evidence: probe-faq.json", "findingIds": [ "F13", "F16" ] }, { "type": "other", "path": "evidence/probe-home.json", "caption": "Audit evidence: probe-home.json", "findingIds": [ "F08", "F10", "F11", "F13" ] }, { "type": "other", "path": "evidence/probe-safety.json", "caption": "Audit evidence: probe-safety.json", "findingIds": [ "F08", "F14" ] }, { "type": "other", "path": "evidence/recon.json", "caption": "Audit evidence: recon.json", "findingIds": [] }, { "type": "screenshot", "path": "evidence/safety-desktop.png", "caption": "Audit evidence: safety-desktop.png", "findingIds": [ "F14" ] }, { "type": "dom", "path": "evidence/safety-dom.json", "caption": "Audit evidence: safety-dom.json", "findingIds": [] }, { "type": "other", "path": "evidence/secrets.json", "caption": "Audit evidence: secrets.json", "findingIds": [] }, { "type": "video", "path": "evidence/theme-reduced-motion.mp4", "caption": "Audit evidence: theme-reduced-motion.mp4", "findingIds": [ "F02" ] }, { "type": "other", "path": "evidence/trackers.json", "caption": "Audit evidence: trackers.json", "findingIds": [] } ], "config": { "loaded": false }, "coverage": { "catalogVersion": "modern-web-guidance@0.0.172", "catalogChecksum": "sha256:78ccfdb2d483f4c57d9dafed80fd86c6265585a56457c8dcfddc254b80fb44d7", "expected": 58, "recorded": 58, "judged": 58, "blocked": 0, "notRun": 0, "missing": 0, "unknown": 0, "duplicates": 0, "complete": true }, "checkOutcomes": [ { "principleId": "respect-user-preferences", "checkId": "respects-color-scheme", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Dark emulation remained white and color-scheme was normal.", "findingIds": [ "F01" ], "artifacts": [ "evidence/home-dark.png", "evidence/preferences-probe.json" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-reduced-motion", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "500 ms logo/theme animation remained under reduced-motion emulation.", "findingIds": [ "F02" ], "artifacts": [ "evidence/preferences-probe.json", "evidence/theme-reduced-motion.mp4" ] }, { "principleId": "respect-user-preferences", "checkId": "respects-contrast", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Native high-contrast emulation preserved readable controls; Lighthouse identified normal-theme contrast separately.", "artifacts": [ "evidence/preferences-probe.json" ] }, { "principleId": "implement-natural-interactions", "checkId": "view-transitions", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Theme state change uses named View Transitions; standard MPA link navigation remained predictable.", "artifacts": [ "evidence/preferences-probe.json", "evidence/theme-reduced-motion.mp4" ] }, { "principleId": "implement-natural-interactions", "checkId": "scroll-driven-animations", "status": "not-applicable", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "No scroll-linked parallax, reveal, carousel, or scrollytelling interaction exists on the representative templates.", "reason": "No scroll-linked motion to implement." }, { "principleId": "implement-natural-interactions", "checkId": "physical-gestures", "status": "not-applicable", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "The public reference templates expose links and standard scrolling, with no custom swipe, pull, drag, or snap interaction.", "reason": "No gesture-driven feature is present." }, { "principleId": "provide-guided-navigation", "checkId": "scroll-state-aware-chrome", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Persistent navigation and the FAQ in-page link index retain orientation on long pages.", "artifacts": [ "evidence/faq-desktop.png" ] }, { "principleId": "provide-guided-navigation", "checkId": "anchored-positioning", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "The compact language menu remains attached to its trigger at the tested desktop and mobile edges.", "artifacts": [ "evidence/home-desktop.png", "evidence/home-mobile.png" ] }, { "principleId": "provide-guided-navigation", "checkId": "directs-attention", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Active navigation receives a visible underline and FAQ links lead directly to named sections.", "artifacts": [ "evidence/faq-desktop.png", "evidence/home-mobile.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "no-intrusive-interruptions", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "No load-time modal, consent wall, or content-obscuring interstitial appeared on any representative path.", "artifacts": [ "evidence/home-desktop.png", "evidence/apps-mobile.png", "evidence/article-mobile.png" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "semantic-dismissible-primitives", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Language overlay is custom onclick/href=# markup; no popover, dialog, or details was present.", "findingIds": [ "F03" ], "artifacts": [ "evidence/home-dom.json", "evidence/probe-home.json" ] }, { "principleId": "maximize-content-reduce-noise", "checkId": "reduced-chrome", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Screenshots show content-first pages with a compact single-row header and restrained decoration.", "artifacts": [ "evidence/home-mobile.png", "evidence/apps-mobile.png", "evidence/article-mobile.png" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "responsive-no-horizontal-scroll", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "At 360x800, layout reported scrollWidth 360, innerWidth 360, overflow 0 and viewport meta present.", "artifacts": [ "evidence/home-mobile-layout.json", "evidence/home-mobile.png" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "component-level-responsiveness", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Navigation, news, app lists, and article media reflowed to the narrow container without clipping.", "artifacts": [ "evidence/home-mobile.png", "evidence/apps-mobile.png", "evidence/article-mobile.png" ] }, { "principleId": "adapt-to-the-form-factor", "checkId": "input-modality-aware", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Primary navigation targets are 48-50 px high and most keyboard-focused links retain a browser-visible 5 px focus ring.", "artifacts": [ "evidence/focus-target-probe.json" ] }, { "principleId": "support-core-task-success", "checkId": "clear-purpose-and-primary-action", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Homepage states Telegram messaging purpose and exposes platform download choices; Apps groups the choices by platform.", "artifacts": [ "evidence/home-mobile.png", "evidence/apps-mobile.png" ] }, { "principleId": "support-core-task-success", "checkId": "primary-flow-completion", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "The Home to Apps journey reached labeled Android, iOS, desktop, macOS, and web download destinations without an account wall.", "artifacts": [ "evidence/apps-mobile.png", "evidence/probe-apps.json" ] }, { "principleId": "support-core-task-success", "checkId": "clear-system-state-and-recovery", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Invalid route returned HTTP 200 homepage with no not-found state.", "findingIds": [ "F04" ], "artifacts": [ "evidence/404.png", "evidence/404-dom.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "good-core-web-vitals", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Lighthouse mobile LCP was 3.9 s; CLS 0 and TBT 0 ms.", "findingIds": [ "F05" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-trace-summary.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "visual-stability", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Mobile layout observer measured CLS 0 with no shifts; Lighthouse also measured CLS 0.", "artifacts": [ "evidence/home-mobile-layout.json", "evidence/lighthouse-home.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-main-thread", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Lighthouse TBT was 0 ms; raw trace had one 189 ms task and 139 ms TBT, with no repeated long-task pattern.", "artifacts": [ "evidence/home-trace-summary.json", "evidence/lighthouse-home.json" ] }, { "principleId": "be-fast-and-stable", "checkId": "efficient-resource-delivery", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "HAR and image audit show 665 KB images, missing dimensions/srcset/lazy loading, and render-blocking styles.", "findingIds": [ "F09" ], "artifacts": [ "evidence/home-summary.json", "evidence/images.json", "evidence/home.har" ] }, { "principleId": "be-fast-and-stable", "checkId": "trim-unused-and-duplicate-code", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Lighthouse found 26 KiB / 84.7% of telegram.css unused on Home.", "findingIds": [ "F15" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-summary.json" ] }, { "principleId": "be-inclusive", "checkId": "names-roles-labels", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Lighthouse failed image-alt and link-name; image audit corroborated missing alt.", "findingIds": [ "F06" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/images.json" ] }, { "principleId": "be-inclusive", "checkId": "sufficient-contrast", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Lighthouse measured navigation link contrast at 3.89:1.", "findingIds": [ "F07" ], "artifacts": [ "evidence/lighthouse-home.json" ] }, { "principleId": "be-inclusive", "checkId": "structure-and-focus", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "No landmarks across tested templates; heading order skipped levels and Safety had empty headings.", "findingIds": [ "F08" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/probe-home.json", "evidence/probe-safety.json", "evidence/focus-target-probe.json" ] }, { "principleId": "be-inclusive", "checkId": "legible-text", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Mobile and desktop screenshots show readable line lengths, wrapping, spacing, and no clipping.", "artifacts": [ "evidence/faq-desktop.png", "evidence/article-mobile.png", "evidence/apps-mobile.png" ] }, { "principleId": "be-inclusive", "checkId": "zoom-reflow-targets-and-media", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Mobile reflow succeeds, but article/FAQ media omit alt, controls, and text tracks.", "findingIds": [ "F16" ], "artifacts": [ "evidence/probe-blog-communities-editor-invisible-messages.json", "evidence/probe-faq.json", "evidence/article-mobile.png" ] }, { "principleId": "follow-best-practices", "checkId": "no-console-errors", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Lighthouse errors-in-console audit passed.", "artifacts": [ "evidence/lighthouse-home.json" ] }, { "principleId": "follow-best-practices", "checkId": "sound-document-and-assets", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Lighthouse best practices was 1.0, but direct image inspection found missing intrinsic dimensions across Home and Article.", "findingIds": [ "F09" ], "artifacts": [ "evidence/images.json", "evidence/probe-blog-communities-editor-invisible-messages.json" ] }, { "principleId": "follow-best-practices", "checkId": "browser-platform-hygiene", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Lighthouse passed BFCache, deprecations, inspector issues, source maps, paste prevention, and permission-on-load audits.", "artifacts": [ "evidence/lighthouse-home.json" ] }, { "principleId": "be-discoverable", "checkId": "title-and-description", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Titles exist, but all tested templates omit meta descriptions.", "findingIds": [ "F10" ], "artifacts": [ "evidence/lighthouse-home.json", "evidence/probe-home.json", "evidence/probe-faq.json" ] }, { "principleId": "be-discoverable", "checkId": "crawlable-and-mobile-friendly", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Viewport meta and real href links are present; raw HTML exposes 100% rendered content words.", "artifacts": [ "evidence/discoverability.json", "evidence/probe-home.json" ] }, { "principleId": "be-discoverable", "checkId": "canonical-and-indexing-signals", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "robots.txt and sitemap.xml returned 404, most routes lack canonical/hreflang, and missing routes soft-404.", "findingIds": [ "F11" ], "artifacts": [ "evidence/probe-home.json", "evidence/404.png" ] }, { "principleId": "be-discoverable", "checkId": "structured-and-shareable-metadata", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Open Graph metadata is present, but article and organization pages expose no JSON-LD structured entities.", "findingIds": [ "F11" ], "artifacts": [ "evidence/probe-blog-communities-editor-invisible-messages.json", "evidence/probe-home.json" ] }, { "principleId": "be-private-and-secure", "checkId": "secure-transport-and-headers", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "HTTPS/HSTS are present, but CSP and nosniff are absent.", "findingIds": [ "F12" ], "artifacts": [ "evidence/headers.json", "evidence/cookies.json" ] }, { "principleId": "be-private-and-secure", "checkId": "data-minimisation-and-third-parties", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "HAR recorded zero third-party requests; trackers found no known tracker and secrets scan found none.", "artifacts": [ "evidence/home-summary.json", "evidence/trackers.json", "evidence/secrets.json" ] }, { "principleId": "be-private-and-secure", "checkId": "in-context-permissions-and-modern-auth", "status": "not-applicable", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "The audited public informational and download pages do not request permissions and expose no authentication flow.", "reason": "No permission or authentication surface exists in this site scope." }, { "principleId": "be-private-and-secure", "checkId": "defensive-browser-policies", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "CSP, nosniff, Referrer-Policy and Permissions-Policy are missing; HSTS and SAMEORIGIN are present.", "findingIds": [ "F12" ], "artifacts": [ "evidence/headers.json" ] }, { "principleId": "be-resilient", "checkId": "progressive-enhancement", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Discoverability fetch showed HTTP 200 raw HTML with 100% rendered-word coverage and no empty JS shell.", "artifacts": [ "evidence/discoverability.json", "evidence/discoverability-crawler.png" ] }, { "principleId": "be-resilient", "checkId": "resilient-runtime-behaviour", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Representative static pages and dropdown navigation rendered without clipped overlays or fragile loading shells.", "artifacts": [ "evidence/home-mobile.png", "evidence/apps-mobile.png", "evidence/faq-desktop.png" ] }, { "principleId": "be-resilient", "checkId": "offline-and-installable", "status": "not-applicable", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Telegram.org is a public brochure/reference and download site, not the Telegram web application; installability belongs to linked app products.", "reason": "Offline/installable behavior is not necessary for this informational site archetype." }, { "principleId": "be-resilient", "checkId": "network-and-http-failure-states", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Unknown route returned a misleading 200 homepage rather than a recoverable error state.", "findingIds": [ "F04" ], "artifacts": [ "evidence/404.png", "evidence/404-dom.json" ] }, { "principleId": "be-internationalised", "checkId": "lang-dir-and-logical-properties", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Every representative template had empty html lang and dir despite many locale options.", "findingIds": [ "F13" ], "artifacts": [ "evidence/probe-home.json", "evidence/probe-faq.json" ] }, { "principleId": "be-internationalised", "checkId": "locale-aware-data", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "The server exposes explicit locale variants and localized navigation; date labels are rendered as content rather than fragile client-side date math.", "artifacts": [ "evidence/recon.json", "evidence/probe-home.json" ] }, { "principleId": "be-internationalised", "checkId": "time-zone-correctness", "status": "not-applicable", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "The audited site renders publication dates only and has no times, scheduled events, durations, or time-zone-sensitive user input.", "reason": "No time-zone-sensitive data or interaction exists." }, { "principleId": "be-trustworthy", "checkId": "no-dark-patterns", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "No consent wall, upsell, disguised advertisement, forced continuity, or confirmshaming appeared on the representative paths.", "artifacts": [ "evidence/home-desktop.png", "evidence/apps-mobile.png", "evidence/safety-desktop.png" ] }, { "principleId": "be-trustworthy", "checkId": "humane-error-handling", "status": "not-applicable", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "No user-input forms are present on the audited public templates.", "reason": "No form validation flow exists." }, { "principleId": "be-trustworthy", "checkId": "trustworthy-input-assistance", "status": "not-applicable", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "No address, payment, sign-in, sign-up, or other input field is present.", "reason": "No input fields exist in scope." }, { "principleId": "be-trustworthy", "checkId": "safe-commercial-and-account-flows", "status": "not-applicable", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "No checkout, subscription, account, consent, or authentication flow is hosted on these public pages.", "reason": "No commercial or account-management flow exists in scope." }, { "principleId": "be-sustainable", "checkId": "optimised-assets", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Homepage uses WebP, but two large below-fold images lack responsive sources and intrinsic sizing.", "findingIds": [ "F09" ], "artifacts": [ "evidence/images.json", "evidence/home-summary.json" ] }, { "principleId": "be-sustainable", "checkId": "no-wasteful-work", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "HAR found no third-party background requests and trace found no sustained long-task activity.", "artifacts": [ "evidence/home-summary.json", "evidence/home-trace-summary.json", "evidence/trackers.json" ] }, { "principleId": "be-sustainable", "checkId": "third-party-and-media-budget", "status": "issues", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Safety autoplays a muted control-free video; Home transfers 37 KB media before user interaction.", "findingIds": [ "F14" ], "artifacts": [ "evidence/probe-safety.json", "evidence/home-summary.json" ] }, { "principleId": "be-agent-ready", "checkId": "structured-agent-capabilities", "status": "not-applicable", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "This public informational/download site exposes content and outbound downloads, not a transactional agent tool surface.", "reason": "No safe agent-executable capability is required for the scoped site." }, { "principleId": "be-agent-ready", "checkId": "on-device-inference", "status": "not-applicable", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "No summarization, generation, or other inference task is part of the public site experience.", "reason": "On-device inference would not improve a defined core task here." }, { "principleId": "be-memory-efficient", "checkId": "no-leak-under-repeated-interaction", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "After ten real theme toggles, heap grew only 121,033 B (0.42%) and no Detached constructor entered the summary.", "artifacts": [ "evidence/heap-baseline.json", "evidence/heap-post.json" ] }, { "principleId": "be-memory-efficient", "checkId": "bounded-footprint", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Baseline heap was 28,981,761 B across 68,859 nodes, proportionate to the media-rich landing page.", "artifacts": [ "evidence/heap-baseline.json" ] }, { "principleId": "be-memory-efficient", "checkId": "no-detached-dom-or-unbounded-listeners", "status": "pass", "confidence": "high", "method": "Direct screenshot, raw-CDP DOM/evaluate probe, or objective tool output as cited.", "evidence": "Neither baseline nor post-interaction heap summaries listed Detached constructors; ten toggles showed bounded growth.", "artifacts": [ "evidence/heap-baseline.json", "evidence/heap-post.json" ] } ], "principleOutcomes": [ { "principleId": "respect-user-preferences", "expectation": "default", "status": "issues", "findingIds": [ "F01", "F02" ] }, { "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": [ "F03" ] }, { "principleId": "adapt-to-the-form-factor", "expectation": "default", "status": "pass" }, { "principleId": "support-core-task-success", "expectation": "default", "status": "issues", "findingIds": [ "F04" ] }, { "principleId": "be-fast-and-stable", "expectation": "default", "status": "issues", "findingIds": [ "F05", "F09", "F15" ] }, { "principleId": "be-inclusive", "expectation": "default", "status": "issues", "findingIds": [ "F06", "F07", "F08", "F16" ] }, { "principleId": "follow-best-practices", "expectation": "default", "status": "issues", "findingIds": [ "F09" ] }, { "principleId": "be-discoverable", "expectation": "default", "status": "issues", "findingIds": [ "F10", "F11" ] }, { "principleId": "be-private-and-secure", "expectation": "default", "status": "issues", "findingIds": [ "F12" ] }, { "principleId": "be-resilient", "expectation": "contextual", "status": "issues", "findingIds": [ "F04" ] }, { "principleId": "be-internationalised", "expectation": "contextual", "status": "issues", "findingIds": [ "F13" ] }, { "principleId": "be-trustworthy", "expectation": "default", "status": "pass" }, { "principleId": "be-sustainable", "expectation": "contextual", "status": "issues", "findingIds": [ "F09", "F14" ] }, { "principleId": "be-agent-ready", "expectation": "contextual", "status": "not-applicable", "reason": "No safe agent-executable capability is required for the scoped site. On-device inference would not improve a defined core task here." }, { "principleId": "be-memory-efficient", "expectation": "default", "status": "pass" } ], "paths": [ { "id": "home", "description": "Public landing page and primary app-download discovery journey.", "url": "https://telegram.org/", "conditions": [ "desktop", "viewport: 360x800", "prefers-color-scheme: dark", "prefers-reduced-motion: reduce", "keyboard-only", "no JavaScript crawler" ], "result": "issues" }, { "id": "apps", "description": "Application listing, representing the primary download-choice flow.", "url": "https://telegram.org/apps", "conditions": [ "viewport: 360x800" ], "result": "issues" }, { "id": "faq", "description": "Long-form support/reference template with in-page navigation.", "url": "https://telegram.org/faq", "conditions": [ "desktop" ], "result": "issues" }, { "id": "article", "description": "Current news article template with rich images and video.", "url": "https://telegram.org/blog/communities-editor-invisible-messages", "conditions": [ "viewport: 360x800" ], "result": "issues" }, { "id": "safety", "description": "Data-rich trust/safety page, including charts and background media.", "url": "https://telegram.org/safety", "conditions": [ "desktop" ], "result": "issues" }, { "id": "not-found", "description": "Invalid-route recovery and HTTP status handling.", "url": "https://telegram.org/this-page-does-not-exist-audit", "conditions": [ "desktop" ], "result": "issues" } ], "findings": [ { "id": "F01", "severity": "medium", "confidence": "high", "summary": "The site does not follow the system dark-color preference.", "evidence": "Under emulated prefers-color-scheme: dark, the screenshot remained light and the probe reported body background rgb(255,255,255), root color-scheme normal. A manual theme toggle exists, but the initial state is not preference-driven.", "suggestedFix": "Initialize the theme from prefers-color-scheme, declare color-scheme: light dark, retain the user override, and use dark-mode guidance.", "principleId": "respect-user-preferences", "principleCheckId": "respects-color-scheme", "guidanceId": "dark-mode", "guidanceCategory": "css", "effort": "small", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/home-dark.png", "evidence/preferences-probe.json" ] }, { "id": "F02", "severity": "medium", "confidence": "high", "summary": "Theme motion still runs when reduced motion is requested.", "evidence": "With prefers-reduced-motion: reduce active, the probe still found the 500 ms t-logo-play animation and 500 ms View Transition rules; the captured theme interaction continued to animate.", "suggestedFix": "Wrap non-essential theme and logo animation in no-preference and provide an effectively instant reduced-motion state.", "principleId": "respect-user-preferences", "principleCheckId": "respects-reduced-motion", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "effort": "small", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/preferences-probe.json", "evidence/theme-reduced-motion.mp4" ] }, { "id": "F03", "severity": "low", "confidence": "high", "summary": "The language menu is an ad-hoc dropdown rather than a semantic disclosure or popover.", "evidence": "DOM inspection found no popover, dialog, or details elements; the language trigger is an anchor with onclick and href=\"#\", backed by a Bootstrap-style custom menu.", "suggestedFix": "Use a button plus Popover API or a details disclosure, with declarative light dismiss and explicit expanded state.", "principleId": "maximize-content-reduce-noise", "principleCheckId": "semantic-dismissible-primitives", "guidanceId": "declarative-dialog-popover-control", "guidanceCategory": "html", "effort": "small", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/home-dom.json", "evidence/focus-target-probe.json" ] }, { "id": "F04", "severity": "high", "confidence": "high", "summary": "Unknown URLs return a soft 404 with no recovery message.", "evidence": "A request to /this-page-does-not-exist-audit returned HTTP 200 and rendered the homepage without explaining the missing page or offering contextual recovery.", "suggestedFix": "Return HTTP 404 and render a concise not-found state with Home, Apps, FAQ, and search/help recovery actions.", "principleId": "support-core-task-success", "principleCheckId": "clear-system-state-and-recovery", "guidanceId": "persistent-toast-notifications", "guidanceCategory": "user-experience", "effort": "small", "pathId": "not-found", "url": "https://telegram.org/this-page-does-not-exist-audit", "artifacts": [ "evidence/404.png", "evidence/404-dom.json" ] }, { "id": "F05", "severity": "high", "confidence": "high", "summary": "Mobile Largest Contentful Paint misses the good threshold.", "evidence": "Lighthouse measured LCP at 3.9 s (performance 0.88), while the raw-CDP trace measured desktop LCP at 895 ms. The mobile result indicates the common constrained condition is not good.", "suggestedFix": "Prioritize the mobile LCP resource, remove unnecessary early downloads, and verify LCP at or below 2.5 s.", "principleId": "be-fast-and-stable", "principleCheckId": "good-core-web-vitals", "guidanceId": "performance", "guidanceCategory": "performance", "effort": "medium", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-trace-summary.json" ] }, { "id": "F06", "severity": "high", "confidence": "high", "summary": "Important images and one linked logo lack accessible alternatives.", "evidence": "Lighthouse failed image-alt and link-name: two recent-news images have no alt attribute and the logo link has no accessible text. The image primitive independently reported both audited images missing alt.", "suggestedFix": "Give informative images concise alt text, mark decorative images alt=\"\", and provide the logo link an accessible name.", "principleId": "be-inclusive", "principleCheckId": "names-roles-labels", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "effort": "small", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/lighthouse-home.json", "evidence/images.json" ] }, { "id": "F07", "severity": "medium", "confidence": "high", "summary": "Primary blue navigation text does not meet minimum contrast.", "evidence": "Lighthouse contrast checks measured #0088cc on white at 3.89:1 for 15 px navigation links, below WCAG AA 4.5:1.", "suggestedFix": "Darken the link color or increase size/weight so normal text reaches at least 4.5:1 in every theme.", "principleId": "be-inclusive", "principleCheckId": "sufficient-contrast", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "effort": "trivial", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-desktop.png" ] }, { "id": "F08", "severity": "medium", "confidence": "high", "summary": "Document structure lacks landmarks and has skipped or empty headings.", "evidence": "Across five templates the probe found no main/nav/header/footer landmarks. Homepage starts at h3 and Lighthouse flagged heading order; Safety contains empty h1/h2/h6 elements. The EN trigger also loses its visible outline in the focus probe.", "suggestedFix": "Introduce semantic landmarks, one meaningful h1 per page, a non-skipping heading hierarchy, remove empty headings, and preserve a strong :focus-visible style.", "principleId": "be-inclusive", "principleCheckId": "structure-and-focus", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "effort": "medium", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/lighthouse-home.json", "evidence/probe-home.json", "evidence/probe-safety.json", "evidence/focus-target-probe.json" ] }, { "id": "F09", "severity": "medium", "confidence": "high", "summary": "Images are delivered without responsive sizing, intrinsic dimensions, or below-fold lazy loading.", "evidence": "The image primitive found 2/2 homepage images missing width/height, srcset, and lazy loading. HAR recorded 665,735 image bytes, led by 323,943 B and 140,534 B below-fold images.", "suggestedFix": "Set intrinsic width and height, provide srcset/sizes, and lazy-load below-fold images while keeping the LCP image eager and prioritized.", "principleId": "be-fast-and-stable", "principleCheckId": "efficient-resource-delivery", "guidanceId": "optimize-image-priority", "guidanceCategory": "performance", "effort": "small", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/images.json", "evidence/home-summary.json", "evidence/home.har" ] }, { "id": "F10", "severity": "medium", "confidence": "high", "summary": "Public templates omit standard meta descriptions.", "evidence": "DOM probes for Home, Apps, FAQ, Safety, and the article all returned no meta[name=description]; Lighthouse SEO failed meta-description despite Open Graph descriptions being present.", "suggestedFix": "Add a unique visible-content-aligned meta description to every public template.", "principleId": "be-discoverable", "principleCheckId": "title-and-description", "guidanceId": "html", "guidanceCategory": "html", "effort": "small", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/lighthouse-home.json", "evidence/probe-home.json", "evidence/probe-blog-communities-editor-invisible-messages.json" ] }, { "id": "F11", "severity": "medium", "confidence": "high", "summary": "Indexing signals are incomplete and unknown routes are indexable soft 404s.", "evidence": "robots.txt and sitemap.xml both returned 404; most templates have no canonical link or hreflang, and an invalid URL returns indexable HTTP 200 content.", "suggestedFix": "Publish robots.txt and sitemap.xml, add self-canonicals and locale hreflang links, and ensure missing URLs return 404.", "principleId": "be-discoverable", "principleCheckId": "canonical-and-indexing-signals", "guidanceId": "html", "guidanceCategory": "html", "effort": "small", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/probe-home.json", "evidence/404.png" ] }, { "id": "F12", "severity": "high", "confidence": "high", "summary": "Several browser-enforced security policies are absent.", "evidence": "The headers primitive found no Content-Security-Policy, X-Content-Type-Options, Referrer-Policy, or Permissions-Policy. HTTPS, HSTS, and SAMEORIGIN framing protection are present.", "suggestedFix": "Deploy a nonce/hash-based CSP in report-only then enforce it; add nosniff, strict-origin-when-cross-origin, and a least-privilege Permissions-Policy.", "principleId": "be-private-and-secure", "principleCheckId": "defensive-browser-policies", "guidanceId": "security", "guidanceCategory": "security", "effort": "medium", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/headers.json" ] }, { "id": "F13", "severity": "medium", "confidence": "high", "summary": "Localized pages do not declare their language or direction.", "evidence": "All five representative DOM probes reported empty html lang and dir despite the site offering many language variants, including Arabic and Persian.", "suggestedFix": "Set html lang to the selected locale and dir=\"rtl\" for RTL languages; migrate layout rules toward logical properties.", "principleId": "be-internationalised", "principleCheckId": "lang-dir-and-logical-properties", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "effort": "small", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/probe-home.json", "evidence/probe-faq.json" ] }, { "id": "F14", "severity": "low", "confidence": "high", "summary": "The Safety page autoplays background video.", "evidence": "The Safety DOM probe found an autoplaying muted video with no controls; autoplay spends media and processing resources before user intent.", "suggestedFix": "Use a poster by default and start playback after intent or when meaningfully visible; pause it offscreen and under reduced motion.", "principleId": "be-sustainable", "principleCheckId": "third-party-and-media-budget", "guidanceId": "deliver-optimized-decorative-images", "guidanceCategory": "performance", "effort": "small", "pathId": "safety", "url": "https://telegram.org/safety", "artifacts": [ "evidence/probe-safety.json", "evidence/safety-desktop.png" ] }, { "id": "F15", "severity": "low", "confidence": "high", "summary": "A mostly unused global stylesheet is render-blocking.", "evidence": "Lighthouse estimated 26 KiB unused CSS (84.7% of telegram.css), and HAR confirms three parser-inserted VeryHigh-priority stylesheets before content.", "suggestedFix": "Split template CSS, remove dead selectors, and inline only the genuinely critical rules.", "principleId": "be-fast-and-stable", "principleCheckId": "trim-unused-and-duplicate-code", "guidanceId": "performance", "guidanceCategory": "performance", "effort": "medium", "pathId": "home", "url": "https://telegram.org/", "artifacts": [ "evidence/lighthouse-home.json", "evidence/home-summary.json" ] }, { "id": "F16", "severity": "medium", "confidence": "high", "summary": "Article and support media lack complete text alternatives and playback controls.", "evidence": "Article probes found multiple images with no alt and three videos without controls or tracks; FAQ also contains unlabeled images and videos without controls/tracks.", "suggestedFix": "Add meaningful alt text or empty alt for decoration, expose controls, and provide captions/transcripts where video conveys information.", "principleId": "be-inclusive", "principleCheckId": "zoom-reflow-targets-and-media", "guidanceId": "accessibility", "guidanceCategory": "accessibility", "effort": "medium", "pathId": "article", "url": "https://telegram.org/blog/communities-editor-invisible-messages", "artifacts": [ "evidence/probe-blog-communities-editor-invisible-messages.json", "evidence/probe-faq.json" ] } ], "taskList": [ { "id": "T01", "title": "Restore semantic, named, structured and contrast-compliant content", "priority": 1, "findingIds": [ "F06", "F07", "F08", "F13", "F16" ], "guidanceId": "accessibility", "status": "open" }, { "id": "T02", "title": "Add CSP and the missing defensive response policies", "priority": 2, "findingIds": [ "F12" ], "guidanceId": "security", "status": "open" }, { "id": "T03", "title": "Fix soft 404s and publish complete indexing metadata", "priority": 3, "findingIds": [ "F04", "F10", "F11" ], "guidanceId": "html", "status": "open" }, { "id": "T04", "title": "Optimize and correctly size responsive images to improve mobile LCP", "priority": 4, "findingIds": [ "F05", "F09", "F15" ], "guidanceId": "optimize-image-priority", "status": "open" }, { "id": "T05", "title": "Honor system theme and reduced-motion preferences", "priority": 5, "findingIds": [ "F01", "F02", "F14" ], "guidanceId": "dark-mode", "status": "open" }, { "id": "T06", "title": "Replace the custom language dropdown with a semantic disclosure", "priority": 6, "findingIds": [ "F03" ], "guidanceId": "declarative-dialog-popover-control", "status": "open" } ], "budget": { "pathCount": 6, "auditPasses": 1 }, "agent": "pi", "runId": "2026-07-22T02-16-33-859Z" }