{
  "object_id": "asca:source-overlap@2026-05.v1",
  "title": "AI search source overlap changes after hostname normalization",
  "claim": "After removing only a leading www prefix, AI Mode–Gemini domain overlap increased from 4.66% to 10.95%.",
  "observed_at": "2026-08-21",
  "source_snapshot": "May 2026",
  "source_dataset": "https://github.com/danishashko/ai-citation-patterns",
  "method": "Parse 153425 citation records, build unique hostname sets per platform, calculate pairwise Jaccard overlap, remove only a leading www prefix, and calculate again.",
  "data_url": "/data/platform-source-overlap-2026-05.csv",
  "data_sha256": "51f401fd338823440dcb6be4dc622073134b7c23f608917603748fe227302b66",
  "license": "MIT",
  "related_object_ids": [
    "asca:pairwise-overlap-ranking@2026-05.v1",
    "asca:normalization-sensitivity@2026-05.v1",
    "asca:reproduction-protocol@2026-05.v1",
    "asca:interpretation-boundaries@2026-05.v1"
  ],
  "limitations": [
    "The source dataset is independently produced and not independently audited here.",
    "Domain overlap does not measure retrieval quality, clicks, or repeat traffic.",
    "Only a leading www prefix is normalized."
  ]
}