{
  "schema_version": "1.0",
  "domain": "agent-index.org",
  "tracker_id": "agent-index-convergence-tracker",
  "title": "Agent Index Convergence Tracker — Cycle 1",
  "cycle_number": 1,
  "report_date": "2026-03-26",
  "slug": "2026-03-26-agent-index-convergence-tracker-cycle-1",
  "direction": "ACCELERATING",
  "confidence": "HIGH (official sitemap/page/API evidence + local crawler telemetry)",
  "key_signal": "Anthropic refreshed both Economic Index dashboard and open dataset on **2026-03-24**, while no equivalent recurring competitor instrument appeared.",
  "anthropic_agent_index_status": "No new standalone publication detected (as of 2026-03-26)",
  "economic_index_latest_edition": "V5 context remains current (March 2026 cycle)",
  "executive_summary": [
    "No standalone Anthropic Agent Index publication is visible yet in official sitemap surfaces [CONFIRMED].",
    "Anthropic’s Economic Index layer did update on March 24, 2026 (site + dataset), so the measurement stack is still actively shipping [CONFIRMED].",
    "Constellation crawler telemetry remains inventory-heavy for ClaudeBot (75.89% sitemap, 22.57% robots, 0.12% content over last 7 days) [OBSERVED].",
    "Convergence direction remains **ACCELERATING** because recurring publication cadence + open dataset refreshes still outpace competitors’ one-off instruments [INFERRED]."
  ],
  "sources": [
    "https://www.anthropic.com/sitemap.xml",
    "https://www.anthropic.com/economic-index",
    "https://huggingface.co/api/datasets/Anthropic/EconomicIndex",
    "https://www.anthropic.com/events/agentic-ai-in-action",
    "https://modelcontextprotocol.io/specification/2025-06-18",
    "https://datatracker.ietf.org/doc/draft-cui-ai-agent-discovery-invocation/",
    "Local crawler telemetry (private logs, summarized in report metrics)",
    "Internal rollout artifact (private), reflected in published coverage metrics"
  ],
  "report_file": "agent-index-tracker_2026-03-26.md",
  "published_at": "2026-03-26T16:38:23Z",
  "latest_paths": {
    "brief": "/intelligence/briefs/agent-index-convergence/latest",
    "markdown": "/intelligence/briefs/agent-index-convergence/latest.md",
    "json": "/intelligence/briefs/agent-index-convergence/latest.json",
    "feed": "/feed/agent-index.json"
  },
  "state_snapshot": {
    "cycle_number": 1,
    "last_run_date": "2026-03-26",
    "convergence_direction": "ACCELERATING",
    "anthropic_agent_index_status": "NO_NEW_PUBLICATION",
    "economic_index_latest_version": "V5 (March 2026; refreshed 2026-03-24)",
    "crawler_signals": {
      "claudebot": {
        "monthly_requests_vercel": "370M",
        "crawl_to_refer_ratio": "23,951:1 (March 2026 mid-month)",
        "ratio_trend": "IMPROVING (45,458 Jan → 25,023 Feb → 11,736 Mar mid)",
        "content_type_breakdown": {
          "images": "35.17%",
          "javascript": "23.84%",
          "html": "~30%",
          "other": "~11%"
        },
        "404_rate": "34.16%",
        "js_rendering": false,
        "geographic_origin": "Columbus, OH (AWS ASN 16509)",
        "constellation_behavior": "75.89% sitemaps, 22.57% robots.txt, 0.12% content (last 7 days)",
        "behavior_shift_date": "2026-03-17",
        "behavior_shift_description": "Shifted from content-reading to pure inventory/sitemap-polling mode. Coincides with Agent Index Presentation at London event.",
        "last_measured_window": "2026-03-19 to 2026-03-26",
        "last_measured_requests": 3239
      }
    },
    "protocol_adoption": {
      "notes": "No baseline metrics yet. First cycle will establish.",
      "agent_json_rollout": {
        "coverage": "57/63",
        "coverage_pct": 90.48,
        "generated_at_utc": "2026-03-26T01:34:36Z"
      },
      "mcp_spec_version": "2025-06-18",
      "ietf_agent_discovery_draft": "draft-cui-ai-agent-discovery-invocation-01 (expires 2026-08-16)"
    }
  }
}