{
  "schemaVersion": 1,
  "generatedAt": "2026-08-18T09:02:46.278Z",
  "verifiedDate": "2026-08-18",
  "author": "Mack Grenfell",
  "reviewer": "Mack Grenfell",
  "privacy": {
    "minimumCitationBrandCount": 3,
    "policy": "Only aggregate research data is published. Customer identities, raw prompts, raw responses, account identifiers, property identifiers, raw URLs, conversions, and absolute traffic volumes are excluded from these downloads."
  },
  "datasets": {
    "citationIndex": {
      "id": "citation-index",
      "label": "AI Citation Index",
      "status": "verified-snapshot",
      "source": "Trakkr citation snapshot index",
      "sourceUrl": "https://storage.googleapis.com/trakkr-public/research/citation-index/latest-slim.json",
      "dates": "2025-10-03 to 2026-08-18",
      "records": "48,422,016 citation appearances, 2,602,557 unique URLs, 529,165 domains, and 1,643 tracked brands",
      "modelScope": "The public aggregate does not retain provider-level attribution, so model comparisons and response-level citation rates are unavailable.",
      "geography": "Prompt and response geography is not retained in the public aggregate.",
      "sampling": "Latest valid citation snapshot per tracked brand. Counts are appearance counts within those snapshots, not a census of all AI answers.",
      "omissions": [
        "Raw prompts",
        "Raw responses",
        "Customer identities",
        "Account identifiers",
        "Model-level denominators",
        "Geography"
      ],
      "privacy": "Downloads include aggregate domain rows seen across at least 3 contributing brands. Raw URLs and customer data are excluded.",
      "verificationDate": "2026-08-18"
    },
    "trafficIndex": {
      "id": "traffic-index",
      "label": "AI Search Traffic Index",
      "status": "verified-snapshot",
      "source": "Aggregated Google Analytics 4 session-source data",
      "sourceUrl": "https://chatgpt.trakkr.ai/get-all",
      "dates": "2025-06-01 to 2026-08-17",
      "records": "4,928 qualifying GA4 properties and 443 daily observations",
      "modelScope": "Traffic sources are detected from GA4 sessionSource values. This measures visible referrals, not model usage or total AI search volume.",
      "geography": "Geography and device are not published.",
      "sampling": "A changing panel of connected GA4 properties. Source rows require at least 3 properties and source-by-industry rows require at least 25.",
      "omissions": [
        "Property identities",
        "Absolute public pageview totals",
        "Landing pages",
        "Conversions",
        "Geography",
        "Device",
        "Citation-to-click joins"
      ],
      "privacy": "Public downloads contain normalized trends and aggregate source shares only. Property identifiers and absolute panel volumes are excluded.",
      "verificationDate": "2026-08-18"
    },
    "publicRankings": {
      "id": "public-rankings",
      "label": "Public AI brand rankings",
      "status": "verified-snapshot",
      "source": "Trakkr public rankings status API",
      "sourceUrl": "https://api.trakkr.ai/public/rankings/status",
      "dates": "2026-08-17",
      "records": "9,257 ranked brands across 500 industries",
      "modelScope": "Aggregate multi-model visibility ranking. Row-level model evidence is not part of the status response.",
      "geography": "The public status response does not publish geographic coverage.",
      "sampling": "Brands and industries included in the current public rankings projection.",
      "omissions": [
        "Private brand records",
        "Prompt text",
        "Raw model responses",
        "Customer identities"
      ],
      "privacy": "Only public ranking aggregates and approved leaderboard rows are exposed.",
      "verificationDate": "2026-08-18"
    },
    "modelDivergence": {
      "id": "model-divergence",
      "label": "Model divergence benchmark",
      "status": "verified-snapshot",
      "source": "Trakkr model divergence aggregate",
      "sourceUrl": "/data/model_divergence_stats.json",
      "dates": "2025-08-12 to 2026-03-11",
      "records": "797,644 valid comparisons across 8 models",
      "modelScope": "8 tracked models. The public file withholds prompt examples and identifiable rows.",
      "geography": "Not retained in the public aggregate.",
      "sampling": "Pairwise comparison of brand recommendations for matched prompts with sufficient model coverage.",
      "omissions": [
        "Raw prompts",
        "Raw responses",
        "Brand-level rows",
        "Geography"
      ],
      "privacy": "Only aggregate distributions and rates are published.",
      "verificationDate": "2026-08-18"
    },
    "crawlerBehavior": {
      "id": "crawler-behavior",
      "label": "AI crawler behavior benchmark",
      "status": "verified-snapshot",
      "source": "Trakkr aggregate crawler observations",
      "sourceUrl": "/data/crawler_research_final.json",
      "dates": "2025-06-11 to 2026-02-01",
      "records": "575,788 crawler visits across 84 brands and 314,501 URLs",
      "modelScope": "Bot user agents and crawler identities, not generated responses.",
      "geography": "Crawler request geography is not part of this public study.",
      "sampling": "Dominant e-commerce brand excluded to ensure generalizable patterns",
      "omissions": [
        "Brand identities",
        "Raw request logs",
        "IP addresses",
        "Customer URLs"
      ],
      "privacy": "Only aggregate behavior distributions are published.",
      "verificationDate": "2026-08-18"
    },
    "llmsTxt": {
      "id": "llms-txt",
      "label": "llms.txt adoption study",
      "status": "verified-snapshot",
      "source": "Trakkr llms.txt scan and citation aggregate",
      "sourceUrl": "/data/llmstxt_effect_stats.json",
      "dates": "2026-03-14",
      "records": "37,894 domains scanned",
      "modelScope": "Citation aggregate does not provide a publishable model split.",
      "geography": "Global public domains; country mix is not published.",
      "sampling": "Domains observed in the Trakkr citation corpus and scanned for an accessible llms.txt file.",
      "omissions": [
        "Named adopters",
        "Named non-adopters",
        "Customer identities"
      ],
      "privacy": "Only aggregate adoption and outcome distributions are published.",
      "verificationDate": "2026-08-18"
    },
    "pageTypes": {
      "id": "page-types",
      "label": "Page type performance study",
      "status": "verified-snapshot",
      "source": "Trakkr classified citation and crawler aggregates",
      "sourceUrl": "/data/page_type_performance_stats.json",
      "dates": "2025-01-01 to 2026-03-14",
      "records": "337,362 citations and 11,406,191 crawler visits",
      "modelScope": "Cross-model aggregate only.",
      "geography": "Not retained in the public aggregate.",
      "sampling": "Page classifier coverage is 58%. Unclassified pages remain in the total.",
      "omissions": [
        "Raw URLs",
        "Brand identities",
        "Model splits",
        "Unclassified page labels"
      ],
      "privacy": "Only aggregate page-type cells are published.",
      "verificationDate": "2026-08-18"
    },
    "markdownExperiment": {
      "id": "markdown-experiment",
      "label": "Markdown crawler experiment",
      "status": "verified-snapshot",
      "source": "Trakkr randomized Markdown crawler experiment",
      "sourceUrl": "/data/markdown-crawler-experiment-stats.json",
      "dates": "2026-04-18 to 2026-08-05",
      "records": "9,033 eligible pages: 4,517 HTML and 4,516 Markdown",
      "modelScope": "Observed crawler and live-retrieval cohorts defined in the public experiment file.",
      "geography": "Not published.",
      "sampling": "Canonical paths randomized at page level into HTML and Markdown variants.",
      "omissions": [
        "Visitor identities",
        "Raw request logs",
        "IP addresses",
        "Customer data"
      ],
      "privacy": "Only aggregate experiment assignments, results, limitations, and weekly snapshots are published.",
      "verificationDate": "2026-08-18"
    },
    "queryTranslation": {
      "id": "query-translation",
      "label": "Query translation study",
      "status": "verified-snapshot",
      "source": "Trakkr prompt-to-query aggregate",
      "sourceUrl": "/data/query-translation-stats.json",
      "dates": "2026-01-22",
      "records": "11,521 prompt-query pairs",
      "modelScope": "Aggregate retrieval transformations. The public file withholds example text.",
      "geography": "Not retained in the public aggregate.",
      "sampling": "Prompt-query pairs with both original prompt and generated retrieval query available for comparison.",
      "omissions": [
        "Raw prompts",
        "Raw queries",
        "Named brands",
        "Language examples"
      ],
      "privacy": "Examples are redacted and withheld; only aggregate transformation rates are published.",
      "verificationDate": "2026-08-18"
    }
  },
  "metrics": {
    "totalCitations": {
      "verificationDate": "2026-08-18",
      "numerator": "Not applicable",
      "denominator": "Not applicable",
      "modelScope": "The public aggregate does not retain provider-level attribution, so model comparisons and response-level citation rates are unavailable.",
      "geography": "Prompt and response geography is not retained in the public aggregate.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "citation-total",
      "label": "Citation appearances",
      "displayValue": "48.4M",
      "rawValue": 48422016,
      "unit": "citation appearances",
      "definition": "Sum of citation appearance counts in the latest valid snapshot for each tracked brand.",
      "sample": "1,643 tracked brands",
      "dates": "2025-10-03 to 2026-08-18",
      "source": "AI Citation Index",
      "sourceUrl": "https://storage.googleapis.com/trakkr-public/research/citation-index/latest-slim.json",
      "limits": "Not unique citations and not a census of all AI answers. A URL can appear more than once.",
      "confidence": "Direct aggregate count from the verified public snapshot.",
      "downloadUrl": "/data/research/citation-index/citation-index-top-domains.csv"
    },
    "citationDomains": {
      "verificationDate": "2026-08-18",
      "numerator": "Not applicable",
      "denominator": "Not applicable",
      "modelScope": "The public aggregate does not retain provider-level attribution, so model comparisons and response-level citation rates are unavailable.",
      "geography": "Prompt and response geography is not retained in the public aggregate.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "citation-domains",
      "label": "Unique cited domains",
      "displayValue": "529.2K",
      "rawValue": 529165,
      "unit": "domains",
      "definition": "Distinct normalized domains present in the current brand citation snapshots.",
      "sample": "2,602,557 unique cited URLs",
      "dates": "2025-10-03 to 2026-08-18",
      "source": "AI Citation Index",
      "sourceUrl": "https://storage.googleapis.com/trakkr-public/research/citation-index/latest-slim.json",
      "limits": "The downloadable slim index contains the top 5,000 domains only.",
      "confidence": "Direct distinct count from the verified public snapshot.",
      "downloadUrl": "/data/research/citation-index/citation-index-top-domains.csv"
    },
    "citationBrands": {
      "verificationDate": "2026-08-18",
      "numerator": "Not applicable",
      "denominator": "Not applicable",
      "modelScope": "The public aggregate does not retain provider-level attribution, so model comparisons and response-level citation rates are unavailable.",
      "geography": "Prompt and response geography is not retained in the public aggregate.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "citation-brands",
      "label": "Tracked brands in Citation Index",
      "displayValue": "1,643",
      "rawValue": 1643,
      "unit": "brands",
      "definition": "Tracked brands with a valid current citation snapshot included in the index.",
      "sample": "48,422,016 citation appearances",
      "dates": "2025-10-03 to 2026-08-18",
      "source": "AI Citation Index",
      "sourceUrl": "https://storage.googleapis.com/trakkr-public/research/citation-index/latest-slim.json",
      "limits": "The tracked brand panel is not a random sample of all brands.",
      "confidence": "Direct count from the verified public snapshot.",
      "downloadUrl": "/data/research/citation-index/citation-index-top-domains.csv"
    },
    "citationTopThreeShare": {
      "verificationDate": "2026-08-18",
      "numerator": "3,409,611",
      "denominator": "48,422,016",
      "modelScope": "The public aggregate does not retain provider-level attribution, so model comparisons and response-level citation rates are unavailable.",
      "geography": "Prompt and response geography is not retained in the public aggregate.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "citation-top-three-share",
      "label": "Top three domain share",
      "displayValue": "7%",
      "rawValue": 7.0414,
      "unit": "percent",
      "definition": "Share of citation appearances attributed to the three most-cited domains in the current snapshot.",
      "sample": "All citation appearances in the current index",
      "dates": "2025-10-03 to 2026-08-18",
      "source": "AI Citation Index",
      "sourceUrl": "https://storage.googleapis.com/trakkr-public/research/citation-index/latest-slim.json",
      "limits": "The ranked domains can change as the tracked brand and prompt panel changes.",
      "confidence": "Calculated from direct counts; display rounded to one decimal place.",
      "downloadUrl": "/data/research/citation-index/citation-index-top-domains.csv"
    },
    "unclassifiedCitationShare": {
      "verificationDate": "2026-08-18",
      "numerator": "42,004,723",
      "denominator": "48,422,016",
      "modelScope": "The public aggregate does not retain provider-level attribution, so model comparisons and response-level citation rates are unavailable.",
      "geography": "Prompt and response geography is not retained in the public aggregate.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "citation-unclassified-share",
      "label": "Unclassified source share",
      "displayValue": "86.75%",
      "rawValue": 86.75,
      "unit": "percent",
      "definition": "Citation share assigned to “other” because the source domain is not in the hand-maintained category map.",
      "sample": "All citation appearances in the current index",
      "dates": "2025-10-03 to 2026-08-18",
      "source": "AI Citation Index category classifier",
      "sourceUrl": "https://storage.googleapis.com/trakkr-public/research/citation-index/latest-slim.json",
      "limits": "Category comparisons describe only the mapped taxonomy and should not be treated as full-web source-type shares.",
      "confidence": "Direct count, but classification coverage is low.",
      "downloadUrl": "/data/research/citation-index/citation-index-top-domains.csv"
    },
    "trafficProperties": {
      "verificationDate": "2026-08-18",
      "numerator": "Not applicable",
      "denominator": "Not applicable",
      "modelScope": "Traffic sources are detected from GA4 sessionSource values. This measures visible referrals, not model usage or total AI search volume.",
      "geography": "Geography and device are not published.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "traffic-properties",
      "label": "Qualifying GA4 properties",
      "displayValue": "4,928",
      "rawValue": 4928,
      "unit": "properties",
      "definition": "Distinct connected GA4 properties contributing at least one detected AI referral in the aggregation window.",
      "sample": "443 daily observations",
      "dates": "2025-06-01 to 2026-08-17",
      "source": "AI Search Traffic Index",
      "sourceUrl": "https://chatgpt.trakkr.ai/get-all",
      "limits": "The connected-property panel changes over time and is not representative of the whole web.",
      "confidence": "Direct distinct count from the verified public aggregate.",
      "downloadUrl": "/data/research/ai-search-traffic/traffic-index-daily.csv"
    },
    "chatgptReferralMix": {
      "verificationDate": "2026-08-18",
      "numerator": "ChatGPT-attributed pageviews in the latest 30 days",
      "denominator": "Pageviews attributed to all detected AI referral sources in the latest 30 days",
      "modelScope": "Traffic sources are detected from GA4 sessionSource values. This measures visible referrals, not model usage or total AI search volume.",
      "geography": "Geography and device are not published.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "chatgpt-referral-mix",
      "label": "ChatGPT share of visible AI referrals",
      "displayValue": "90.5%",
      "rawValue": 90.47,
      "unit": "percent",
      "definition": "ChatGPT-attributed pageviews divided by pageviews attributed to all detected AI referral sources in the latest 30-day window.",
      "sample": "4,928 qualifying GA4 properties",
      "dates": "2025-06-01 to 2026-08-17",
      "source": "AI Search Traffic Index",
      "sourceUrl": "https://chatgpt.trakkr.ai/get-all",
      "limits": "This is panel source mix, not AI search market share. Dark or direct traffic is not recoverable.",
      "confidence": "Calculated from visible GA4 referrers; display rounded to one decimal place.",
      "downloadUrl": "/data/research/ai-search-traffic/traffic-index-source-mix.csv"
    },
    "trafficThirtyDayChange": {
      "verificationDate": "2026-08-18",
      "numerator": "Latest 30-day smoothed AI referral pageviews",
      "denominator": "Prior 30-day smoothed AI referral pageviews",
      "modelScope": "Traffic sources are detected from GA4 sessionSource values. This measures visible referrals, not model usage or total AI search volume.",
      "geography": "Geography and device are not published.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "traffic-thirty-day-change",
      "label": "AI referral index, 30-day change",
      "displayValue": "21.6%",
      "rawValue": 21.601402,
      "unit": "percent",
      "definition": "Change in smoothed AI-attributed pageviews across the panel between the latest 30-day period and the preceding 30-day period.",
      "sample": "4,928 qualifying GA4 properties",
      "dates": "2025-06-01 to 2026-08-17",
      "source": "AI Search Traffic Index",
      "sourceUrl": "https://chatgpt.trakkr.ai/get-all",
      "limits": "Panel composition and referral visibility can change. It is not a forecast.",
      "confidence": "Calculated from aggregated GA4 sessions; display rounded to one decimal place.",
      "downloadUrl": "/data/research/ai-search-traffic/traffic-index-daily.csv"
    },
    "modelAgreement": {
      "verificationDate": "2026-08-18",
      "numerator": "Matched brand recommendations shared by compared models",
      "denominator": "Valid pairwise prompt comparisons",
      "modelScope": "8 tracked models",
      "geography": "Not retained in the public aggregate.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "model-agreement",
      "label": "Average cross-model agreement",
      "displayValue": "43.3%",
      "rawValue": 43.3,
      "unit": "percent",
      "definition": "Average pairwise agreement rate for brand recommendations on matched prompts.",
      "sample": "797,644 valid comparisons",
      "dates": "2025-08-12 to 2026-03-11",
      "source": "Model divergence benchmark",
      "sourceUrl": "/data/model_divergence_stats.json",
      "limits": "A reviewed point-in-time study, not a daily live metric. Agreement depends on the tracked prompt and brand panel.",
      "confidence": "Direct aggregate from the reviewed study."
    },
    "modelCount": {
      "verificationDate": "2026-08-18",
      "numerator": "Not applicable",
      "denominator": "Not applicable",
      "modelScope": "8 tracked models",
      "geography": "Not retained in the public aggregate.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "model-count",
      "label": "Models in divergence benchmark",
      "displayValue": "8",
      "rawValue": 8,
      "unit": "models",
      "definition": "Distinct model families included in the reviewed model-divergence comparison.",
      "sample": "797,644 valid comparisons",
      "dates": "2025-08-12 to 2026-03-11",
      "source": "Model divergence benchmark",
      "sourceUrl": "/data/model_divergence_stats.json",
      "limits": "Model versions and availability change. This is a point-in-time reviewed benchmark.",
      "confidence": "Direct count from the reviewed study."
    },
    "crawlerSingleVisit": {
      "verificationDate": "2026-08-18",
      "numerator": "URLs with one observed visit",
      "denominator": "Unique URLs in the crawler study",
      "modelScope": "Observed AI crawler user agents",
      "geography": "Not published.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "crawler-single-visit-share",
      "label": "URLs observed once",
      "displayValue": "88.5%",
      "rawValue": 88.5,
      "unit": "percent",
      "definition": "Share of URLs with exactly one observed crawler visit during the study window.",
      "sample": "575,788 visits across 314,501 URLs",
      "dates": "2025-06-11 to 2026-02-01",
      "source": "AI crawler behavior benchmark",
      "sourceUrl": "/data/crawler_research_final.json",
      "limits": "Dominant e-commerce brand excluded to ensure generalizable patterns",
      "confidence": "Direct aggregate distribution from the reviewed crawler study."
    },
    "crawlerVisits": {
      "verificationDate": "2026-08-18",
      "numerator": "Not applicable",
      "denominator": "Not applicable",
      "modelScope": "Observed AI crawler user agents",
      "geography": "Not published.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "crawler-visits",
      "label": "AI crawler visits",
      "displayValue": "575.8K",
      "rawValue": 575788,
      "unit": "visits",
      "definition": "Observed requests attributed to the crawler user agents included in the reviewed crawler study.",
      "sample": "84 brands and 314,501 unique URLs",
      "dates": "2025-06-11 to 2026-02-01",
      "source": "AI crawler behavior benchmark",
      "sourceUrl": "/data/crawler_research_final.json",
      "limits": "Dominant e-commerce brand excluded to ensure generalizable patterns",
      "confidence": "Direct aggregate count from the reviewed crawler study."
    },
    "queryCompleteRewrite": {
      "verificationDate": "2026-08-18",
      "numerator": "3,807",
      "denominator": "11,521",
      "modelScope": "Aggregate retrieval transformations. The public file withholds example text.",
      "geography": "Not retained in the public aggregate.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "query-complete-rewrite-rate",
      "label": "Complete query rewrites",
      "displayValue": "33%",
      "rawValue": 33.044007,
      "unit": "percent",
      "definition": "Share of prompt-query pairs classified as complete rewrites by token-set similarity thresholds.",
      "sample": "11,521 prompt-query pairs",
      "dates": "2026-01-22",
      "source": "Query translation study",
      "sourceUrl": "/data/query-translation-stats.json",
      "limits": "Threshold-based text similarity classification. Raw examples are withheld for privacy.",
      "confidence": "Calculated from the reviewed aggregate; display rounded to one decimal place."
    },
    "queryExactMatch": {
      "verificationDate": "2026-08-18",
      "numerator": "20",
      "denominator": "11,521",
      "modelScope": "Aggregate retrieval transformations. The public file withholds example text.",
      "geography": "Not retained in the public aggregate.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "query-exact-match-rate",
      "label": "Exact prompt-query matches",
      "displayValue": "0.17%",
      "rawValue": 0.173596,
      "unit": "percent",
      "definition": "Share of captured prompt-query pairs whose text matched exactly.",
      "sample": "11,521 prompt-query pairs",
      "dates": "2026-01-22",
      "source": "Query translation study",
      "sourceUrl": "/data/query-translation-stats.json",
      "limits": "Captured retrieval transformations only. Hidden retrieval steps are outside the dataset.",
      "confidence": "Calculated from the reviewed aggregate; display rounded to two decimal places."
    },
    "queryYearInjection": {
      "verificationDate": "2026-08-18",
      "numerator": "2,956",
      "denominator": "11,521",
      "modelScope": "Aggregate retrieval transformations. The public file withholds example text.",
      "geography": "Not retained in the public aggregate.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "query-year-injection-rate",
      "label": "Queries adding a year",
      "displayValue": "25.7%",
      "rawValue": 25.657495,
      "unit": "percent",
      "definition": "Share of captured prompt-query pairs where the generated retrieval query added a year term.",
      "sample": "11,521 prompt-query pairs",
      "dates": "2026-01-22",
      "source": "Query translation study",
      "sourceUrl": "/data/query-translation-stats.json",
      "limits": "A year term can be added for several reasons; the aggregate does not establish intent or outcome.",
      "confidence": "Calculated from the reviewed aggregate; display rounded to one decimal place."
    },
    "llmsTxtAdoption": {
      "verificationDate": "2026-08-18",
      "numerator": "5,035",
      "denominator": "37,894",
      "modelScope": "Citation aggregate does not provide a publishable model split.",
      "geography": "Global public domains; country mix is not published.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "llms-txt-adoption",
      "label": "llms.txt adoption",
      "displayValue": "13.3%",
      "rawValue": 13.3,
      "unit": "percent",
      "definition": "Share of scanned citation-corpus domains where an accessible llms.txt file was detected.",
      "sample": "37,894 domains",
      "dates": "2026-03-14",
      "source": "llms.txt adoption study",
      "sourceUrl": "/data/llmstxt_effect_stats.json",
      "limits": "The sample is drawn from AI-cited domains, not all public domains.",
      "confidence": "Direct scan result from the reviewed study."
    },
    "llmsTxtDomains": {
      "verificationDate": "2026-08-18",
      "numerator": "Not applicable",
      "denominator": "Not applicable",
      "modelScope": "Citation aggregate does not provide a publishable model split.",
      "geography": "Global public domains; country mix is not published.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "llms-txt-domains",
      "label": "Domains scanned for llms.txt",
      "displayValue": "37,894",
      "rawValue": 37894,
      "unit": "domains",
      "definition": "Domains in the citation-derived scan corpus checked for an accessible llms.txt file.",
      "sample": "337,362 citation appearances in the linked study corpus",
      "dates": "2026-03-14",
      "source": "llms.txt adoption study",
      "sourceUrl": "/data/llmstxt_effect_stats.json",
      "limits": "The scan corpus is citation-derived and is not a census of all public domains.",
      "confidence": "Direct scan count from the reviewed study."
    },
    "rankedBrands": {
      "verificationDate": "2026-08-18",
      "numerator": "Not applicable",
      "denominator": "Not applicable",
      "modelScope": "Aggregate multi-model visibility ranking. Row-level model evidence is not part of the status response.",
      "geography": "The public status response does not publish geographic coverage.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "ranked-brands",
      "label": "Brands in public rankings",
      "displayValue": "9,257",
      "rawValue": 9257,
      "unit": "brands",
      "definition": "Brands included in the current public AI visibility ranking projection.",
      "sample": "500 industries",
      "dates": "2026-08-17",
      "source": "Public rankings status API",
      "sourceUrl": "https://api.trakkr.ai/public/rankings/status",
      "limits": "The projection is a Trakkr panel, not a census of all brands. Ranking methodology is separate from citation and traffic metrics.",
      "confidence": "Direct aggregate count from the public status API."
    },
    "rankedIndustries": {
      "verificationDate": "2026-08-18",
      "numerator": "Not applicable",
      "denominator": "Not applicable",
      "modelScope": "Aggregate multi-model visibility ranking. Row-level model evidence is not part of the status response.",
      "geography": "The public status response does not publish geographic coverage.",
      "reviewer": "Mack Grenfell",
      "status": "verified-snapshot",
      "id": "ranked-industries",
      "label": "Industries in public rankings",
      "displayValue": "500",
      "rawValue": 500,
      "unit": "industries",
      "definition": "Industry categories represented in the current public AI visibility ranking projection.",
      "sample": "9,257 ranked brands",
      "dates": "2026-08-17",
      "source": "Public rankings status API",
      "sourceUrl": "https://api.trakkr.ai/public/rankings/status",
      "limits": "Industry taxonomy breadth does not imply equal sample size within every industry.",
      "confidence": "Direct aggregate count from the public status API."
    }
  },
  "downloads": [
    {
      "id": "evidence-json",
      "label": "Evidence and provenance",
      "url": "/data/research/evidence.json",
      "format": "JSON",
      "description": "Definitions, samples, dates, sources, limits, confidence notes, and reviewer for every flagship metric.",
      "coverage": "Verified 2026-08-18"
    },
    {
      "id": "citation-csv",
      "label": "Citation Index, top domains",
      "url": "/data/research/citation-index/citation-index-top-domains.csv",
      "format": "CSV",
      "description": "Aggregate domains observed across at least 3 tracked brands. Raw URLs, prompts, and customer data are excluded.",
      "coverage": "Top 5,000 source export, privacy-filtered"
    },
    {
      "id": "traffic-daily-csv",
      "label": "AI traffic daily index",
      "url": "/data/research/ai-search-traffic/traffic-index-daily.csv",
      "format": "CSV",
      "description": "Daily normalized aggregate and source trends. Absolute traffic volumes and property identifiers are excluded.",
      "coverage": "2025-06-01 to 2026-08-17"
    },
    {
      "id": "traffic-source-csv",
      "label": "AI traffic source mix",
      "url": "/data/research/ai-search-traffic/traffic-index-source-mix.csv",
      "format": "CSV",
      "description": "Latest source shares, 30-day change, 7-day change, and contributing property counts.",
      "coverage": "Latest observation 2026-08-17"
    }
  ],
  "definitions": [
    {
      "term": "Citation appearance",
      "definition": "One observed instance of a source URL appearing in a tracked AI response snapshot. It is not necessarily a unique URL or a unique answer."
    },
    {
      "term": "Unique cited domain",
      "definition": "A normalized hostname with at least one citation appearance in the current brand snapshots."
    },
    {
      "term": "Visible AI referral",
      "definition": "A GA4 sessionSource value matching a known AI assistant referrer. Visits without a visible referrer cannot be attributed."
    },
    {
      "term": "Traffic index",
      "definition": "A smoothed series normalized to a peak value. It shows movement, not the public panel’s absolute traffic volume."
    },
    {
      "term": "Source mix",
      "definition": "A source’s share of detected AI-attributed pageviews in the selected panel and period. It is not global AI market share."
    },
    {
      "term": "Verified snapshot",
      "definition": "A point-in-time value regenerated from an attributable public aggregate and checked against its numerator, denominator, and coverage metadata."
    }
  ],
  "updateHistory": [
    {
      "date": "2026-08-18",
      "title": "Flagship evidence refresh",
      "detail": "Rebuilt the three public research surfaces from 48,422,016 citation appearances and 4,928 qualifying GA4 properties."
    },
    {
      "date": "2026-05-06",
      "title": "Markdown experiment added",
      "detail": "Added the randomized 9,033-page crawler experiment as a reviewed State of AI Search dataset."
    },
    {
      "date": "2026-03-30",
      "title": "Longitudinal citation study added",
      "detail": "Added citation persistence and volatility findings with an explicit 177-day citation observation window."
    }
  ],
  "corrections": [
    {
      "date": "2026-08-18",
      "title": "Citation headline and Wikipedia share",
      "detail": "Removed the stale 1.3M citation and 17% Wikipedia claims. The page now resolves current values from the verified Citation Index and records the snapshot date."
    },
    {
      "date": "2026-08-18",
      "title": "Traffic loading values",
      "detail": "Removed invented placeholder growth and source-share values. Loading and failed requests now render as unavailable."
    },
    {
      "date": "2026-08-18",
      "title": "Live-data description",
      "detail": "Replaced “every number is live” with dataset-level status because several reviewed studies are point-in-time snapshots."
    }
  ]
}