Manifest position 104 · CrUX rank bucket 1000

https://www.costco.com

Blocked after retries

Chrome navigation reached chrome-error://chromewebdata/ with ERR_HTTP2_PROTOCOL_ERROR on repeated desktop, mobile, DOM, and evaluate attempts, although curl reached the origin over HTTP/2. The target page never rendered, so site evidence could not be gathered.

Attempts

3 / 3

Judged checks

0 / 58

Blocked

Not run

This report has no published overall score. Blocked and not-run checks are not passes. A coverage-complete report means every check has a judged outcome; it does not mean every check passed.

All 58 atomic check outcomes

Principle / check	Status	Confidence	Evidence or reason
respect-user-preferences `respects-color-scheme`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for respects-color-scheme.
respect-user-preferences `respects-reduced-motion`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for respects-reduced-motion.
respect-user-preferences `respects-contrast`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for respects-contrast.
implement-natural-interactions `view-transitions`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for view-transitions.
implement-natural-interactions `scroll-driven-animations`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for scroll-driven-animations.
implement-natural-interactions `physical-gestures`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for physical-gestures.
provide-guided-navigation `scroll-state-aware-chrome`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for scroll-state-aware-chrome.
provide-guided-navigation `anchored-positioning`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for anchored-positioning.
provide-guided-navigation `directs-attention`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for directs-attention.
maximize-content-reduce-noise `no-intrusive-interruptions`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for no-intrusive-interruptions.
maximize-content-reduce-noise `semantic-dismissible-primitives`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for semantic-dismissible-primitives.
maximize-content-reduce-noise `reduced-chrome`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for reduced-chrome.
adapt-to-the-form-factor `responsive-no-horizontal-scroll`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for responsive-no-horizontal-scroll.
adapt-to-the-form-factor `component-level-responsiveness`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for component-level-responsiveness.
adapt-to-the-form-factor `input-modality-aware`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for input-modality-aware.
support-core-task-success `clear-purpose-and-primary-action`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for clear-purpose-and-primary-action.
support-core-task-success `primary-flow-completion`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for primary-flow-completion.
support-core-task-success `clear-system-state-and-recovery`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for clear-system-state-and-recovery.
be-fast-and-stable `good-core-web-vitals`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for good-core-web-vitals.
be-fast-and-stable `visual-stability`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for visual-stability.
be-fast-and-stable `efficient-main-thread`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for efficient-main-thread.
be-fast-and-stable `efficient-resource-delivery`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for efficient-resource-delivery.
be-fast-and-stable `trim-unused-and-duplicate-code`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for trim-unused-and-duplicate-code.
be-inclusive `names-roles-labels`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for names-roles-labels.
be-inclusive `sufficient-contrast`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for sufficient-contrast.
be-inclusive `structure-and-focus`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for structure-and-focus.
be-inclusive `legible-text`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for legible-text.
be-inclusive `zoom-reflow-targets-and-media`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for zoom-reflow-targets-and-media.
follow-best-practices `no-console-errors`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for no-console-errors.
follow-best-practices `sound-document-and-assets`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for sound-document-and-assets.
follow-best-practices `browser-platform-hygiene`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for browser-platform-hygiene.
be-discoverable `title-and-description`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for title-and-description.
be-discoverable `crawlable-and-mobile-friendly`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for crawlable-and-mobile-friendly.
be-discoverable `canonical-and-indexing-signals`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for canonical-and-indexing-signals.
be-discoverable `structured-and-shareable-metadata`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for structured-and-shareable-metadata.
be-private-and-secure `secure-transport-and-headers`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for secure-transport-and-headers.
be-private-and-secure `data-minimisation-and-third-parties`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for data-minimisation-and-third-parties.
be-private-and-secure `in-context-permissions-and-modern-auth`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for in-context-permissions-and-modern-auth.
be-private-and-secure `defensive-browser-policies`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for defensive-browser-policies.
be-resilient `progressive-enhancement`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for progressive-enhancement.
be-resilient `resilient-runtime-behaviour`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for resilient-runtime-behaviour.
be-resilient `offline-and-installable`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for offline-and-installable.
be-resilient `network-and-http-failure-states`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for network-and-http-failure-states.
be-internationalised `lang-dir-and-logical-properties`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for lang-dir-and-logical-properties.
be-internationalised `locale-aware-data`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for locale-aware-data.
be-internationalised `time-zone-correctness`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for time-zone-correctness.
be-trustworthy `no-dark-patterns`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for no-dark-patterns.
be-trustworthy `humane-error-handling`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for humane-error-handling.
be-trustworthy `trustworthy-input-assistance`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for trustworthy-input-assistance.
be-trustworthy `safe-commercial-and-account-flows`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for safe-commercial-and-account-flows.
be-sustainable `optimised-assets`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for optimised-assets.
be-sustainable `no-wasteful-work`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for no-wasteful-work.
be-sustainable `third-party-and-media-budget`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for third-party-and-media-budget.
be-agent-ready `structured-agent-capabilities`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for structured-agent-capabilities.
be-agent-ready `on-device-inference`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for on-device-inference.
be-memory-efficient `no-leak-under-repeated-interaction`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for no-leak-under-repeated-interaction.
be-memory-efficient `bounded-footprint`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for bounded-footprint.
be-memory-efficient `no-detached-dom-or-unbounded-listeners`	blocked	high	Navigation prerequisite failed with ERR_HTTP2_PROTOCOL_ERROR; no Costco-authored DOM or rendered state was available for no-detached-dom-or-unbounded-listeners.

Provenance

Canonical report: results/atomic/reports/0104-www_costco_com.json
Report SHA-256: b7a624fa3ed5942f939d689d4d3daadc0d3990495e9f3a8b43a9c655b052817a
Local retained report: runs/2026-07-17T17-27-24-856Z/atomic-reports/www_costco_com/2026-07-27T14-45-11-415Z/report.json
Local evidence root: runs/2026-07-17T17-27-24-856Z/atomic-reports/www_costco_com/2026-07-27T14-45-11-415Z
Catalog SHA-256: sha256:78ccfdb2d483f4c57d9dafed80fd86c6265585a56457c8dcfddc254b80fb44d7

Raw screenshots, HARs, traces, heaps, and other browser artifacts are retained at the local evidence root and intentionally are not committed. Artifact paths in the canonical report are relative to that root.