[
  {
    "id": "R01",
    "claim": "UCP buyer-consent extension is supported",
    "url": "https://shopify.dev/changelog/posts/checkout-mcp-and-cart-mcp-now-support-ucp-buyer-consent",
    "source_type": "official changelog",
    "publication_or_update_date": "2026-10-16",
    "event_or_rollout_date": "support documented Oct 16; UCP version 2026-08-25",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "Shopify Cart/Checkout MCP",
    "measured_outcome": "Extension lets compatible agents present/store supported choices",
    "confidence": "high",
    "limitations": "Only negotiated integrations affected. Discovery presence is not an end-to-end test or marketing consent."
  },
  {
    "id": "R02",
    "claim": "Shop MCP offers another agent shopping interface",
    "url": "https://shopify.dev/changelog/posts/add-shopping-and-shop-pay-checkout-to-any-agent-with-shop-mcp",
    "source_type": "official changelog",
    "publication_or_update_date": "2026-10-13",
    "event_or_rollout_date": "announcement Oct 13",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "Shop MCP",
    "measured_outcome": "Search plus commerce capabilities; existing Catalog integrations require no action for this launch",
    "confidence": "high",
    "limitations": "Optional capability, not a reason to install software or transact in an audit; no sales-lift proof."
  },
  {
    "id": "R03",
    "claim": "Global Catalog REST shuts down November 2",
    "url": "https://shopify.dev/changelog/posts/global-catalog-rest-api-stops-serving-traffic-on-november-2-2026",
    "source_type": "official deprecation notice",
    "publication_or_update_date": "2026-10-09",
    "event_or_rollout_date": "2026-11-02 shutdown; April 2026 deprecation",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "Custom Global Catalog REST integrations",
    "measured_outcome": "Affected REST integrations need migration to Global Catalog MCP",
    "confidence": "high",
    "limitations": "Not a general Shopify-store shutdown. U50 app internals/dependency not verified; inventory use before recommending migration."
  },
  {
    "id": "R04",
    "claim": "Unchanged carts no longer emit carts/update webhooks",
    "url": "https://shopify.dev/changelog/posts/unchanged-carts-no-longer-trigger-carts-update-webhooks",
    "source_type": "official changelog",
    "publication_or_update_date": "2026-10-12",
    "event_or_rollout_date": "documented Oct 12",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "Ajax and Storefront API",
    "measured_outcome": "Actual changes still trigger notifications",
    "confidence": "high",
    "limitations": "No-op webhook absence alone is not failed tracking/synchronization. No cart mutation tested."
  },
  {
    "id": "R05",
    "claim": "Session-measurement definition changed in September",
    "url": "https://help.shopify.com/en/manual/reports-and-analytics/discrepancies/session-measurement-update",
    "source_type": "official help",
    "publication_or_update_date": "undated current help",
    "event_or_rollout_date": "2026-09-21–23 rollout",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "Shopify analytics",
    "measured_outcome": "Activity/session/bot-filter changes can move session-based rates without demand changing",
    "confidence": "high",
    "limitations": "Current two weeks are both after rollout; October 12 rolling baseline straddled it. No causal attribution."
  },
  {
    "id": "R06",
    "claim": "Query fan-out study supports testing clear official facts",
    "url": "https://ahrefs.com/blog/query-fan-out-chatgpt/",
    "source_type": "original vendor observational study",
    "publication_or_update_date": "2026-10-12",
    "event_or_rollout_date": "August–September 2026 observations",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "66.6m logged-out GPT-5.6 Luna responses; 15m fan-out queries",
    "measured_outcome": "14.4% triggered search in the vendor dataset",
    "confidence": "medium",
    "limitations": "Not a U50 audit or current-model guarantee; prompt mix and vendor sampling limit transfer; no intervention or causal lift."
  },
  {
    "id": "R07",
    "claim": "Google Indexing API quota documentation updated",
    "url": "https://developers.google.com/search/updates",
    "source_type": "official documentation changelog",
    "publication_or_update_date": "2026-10-16",
    "event_or_rollout_date": "documentation update, not general merchant eligibility change",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "Google Search",
    "measured_outcome": "Current quotas/process documented",
    "confidence": "high",
    "limitations": "Not grounds to submit product pages through restricted-use Indexing API; no U50 integration proposed."
  },
  {
    "id": "R08",
    "claim": "OpenAI bot purposes remain distinct",
    "url": "https://developers.openai.com/api/docs/bots",
    "source_type": "official documentation",
    "publication_or_update_date": "undated current documentation",
    "event_or_rollout_date": "ongoing controls",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "OpenAI search/training/user retrieval",
    "measured_outcome": "Separate access purposes",
    "confidence": "high",
    "limitations": "No verified provider logs; discovery status does not establish crawl or inclusion."
  },
  {
    "id": "R09",
    "claim": "Anthropic newsroom checked for material updates",
    "url": "https://www.anthropic.com/news",
    "source_type": "official news index",
    "publication_or_update_date": "entries through 2026-10-18",
    "event_or_rollout_date": "various",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "Anthropic product/policy news",
    "measured_outcome": "No direct new U50 backend action found in checked entries",
    "confidence": "medium",
    "limitations": "Bounded relevant review, not exhaustive release coverage."
  },
  {
    "id": "R10",
    "claim": "Cloudflare crawler-control changelog checked",
    "url": "https://developers.cloudflare.com/ai-crawl-control/changelog/",
    "source_type": "official changelog",
    "publication_or_update_date": "mixed dated entries",
    "event_or_rollout_date": "older foundation",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "Cloudflare crawler controls",
    "measured_outcome": "No relevant new last-30-day U50 action established",
    "confidence": "medium",
    "limitations": "Existing Shopify origin/WAF configuration not inspected; do not infer access from hosting account."
  },
  {
    "id": "R11",
    "claim": "GitHub October changelog checked",
    "url": "https://github.blog/changelog/month/10-2026/",
    "source_type": "official changelog",
    "publication_or_update_date": "October 2026 entries",
    "event_or_rollout_date": "various",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "Developer tooling",
    "measured_outcome": "No material new store-audit action established",
    "confidence": "medium",
    "limitations": "Not evidence of search visibility gains; bounded review."
  },
  {
    "id": "R12",
    "claim": "Public X access and discovery were limited",
    "url": "https://x.com/searchliaison/status/1790440915993243952",
    "source_type": "original access attempt; bounded recent query",
    "publication_or_update_date": "older 2024 example",
    "event_or_rollout_date": "not a new rollout",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "Public X",
    "measured_outcome": "Original open returned internal error; no usable current original substantiated",
    "confidence": "unavailable",
    "limitations": "No private bookmarks or exhaustive X search. Snippets not used as evidence; newswire discovery yielded no adopted independently verified strategy."
  },
  {
    "id": "R13",
    "claim": "Fresh U50 crawl and rendered journey sample",
    "url": "https://u50.com/sitemap.xml",
    "source_type": "first-party observations",
    "publication_or_update_date": "2026-10-19 UTC access",
    "event_or_rollout_date": "2026-10-18 Pacific audit",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "US/USD public storefront",
    "measured_outcome": "103/103 sitemap HTML 200; 56 PDPs; 25 collections; 1,140 offers",
    "confidence": "high",
    "limitations": "Public content cannot establish actual indexation, conversion loss, provider citations or backend stock cause."
  },
  {
    "id": "R14",
    "claim": "Current merchant structured-data guidance",
    "url": "https://developers.google.com/search/docs/appearance/structured-data/merchant-listing",
    "source_type": "official guidance",
    "publication_or_update_date": "undated",
    "event_or_rollout_date": "older continuing foundation",
    "access_date_pacific": "2026-10-18",
    "access_date_utc": "2026-10-19",
    "surface": "Google merchant eligibility",
    "measured_outcome": "Truthful product/offer/visible review information",
    "confidence": "medium",
    "limitations": "Reopened October 19 UTC; parsing is not full Google feature validation."
  }
]