{
  "version": "2.0-draft",
  "sourceTiers": [
    {
      "tier": 1,
      "code": "primary_official",
      "examples": [
        "official documentation",
        "official pricing page",
        "official model/system card",
        "official API reference",
        "official release notes"
      ],
      "defaultConfidence": 0.98
    },
    {
      "tier": 2,
      "code": "primary_research_regulatory",
      "examples": [
        "peer-reviewed paper",
        "provider research paper",
        "government filing",
        "regulatory document",
        "standards body"
      ],
      "defaultConfidence": 0.95
    },
    {
      "tier": 3,
      "code": "independent_authoritative",
      "examples": [
        "independent benchmark organization",
        "major cloud marketplace documentation",
        "reputable security/evaluation lab"
      ],
      "defaultConfidence": 0.9
    },
    {
      "tier": 4,
      "code": "reputable_secondary",
      "examples": [
        "reputable journalism",
        "well-maintained technical publication"
      ],
      "defaultConfidence": 0.75
    },
    {
      "tier": 5,
      "code": "community_observation",
      "examples": [
        "forum",
        "Reddit",
        "community benchmark",
        "social post"
      ],
      "defaultConfidence": 0.55
    }
  ],
  "rules": [
    "Prefer primary official evidence for pricing, limits, APIs, availability, licensing and lifecycle.",
    "Independent evaluation evidence must remain distinguishable from vendor-reported benchmark claims.",
    "Community evidence can inform discovery or experience notes but should not silently override primary technical facts.",
    "Conflicting credible sources create a conflict state; Artificial Index must not arbitrarily choose one without review.",
    "Every time-sensitive fact should record both captured_at and, where known, effective_at."
  ]
}