{
  "version": "evidence-grade-v1",
  "default_grade": "A-",
  "default_label": "Apple-source indexed transcript",
  "definition": "High-confidence structured index derived from Apple public developer-video feeds, mirrored locally for internal analysis. Not an Apple-official standalone transcript API or Apple-endorsed index.",
  "source_chain": [
    {
      "level": "L0",
      "name": "Apple canonical source",
      "description": "Apple Developer session page and public developer-video feeds.",
      "usage": "Public citation anchor and canonical session identity."
    },
    {
      "level": "L1",
      "name": "wwdc-sessions indexed source",
      "description": "Third-party structured index generated from Apple public developer-video feeds.",
      "usage": "Machine-readable metadata and transcript segments."
    },
    {
      "level": "L2",
      "name": "Insight internal mirror",
      "description": "Local backend mirror of metadata/transcript files. HTTP access is denied by Nginx.",
      "usage": "Internal review, semantic search, summary generation, and quote location."
    },
    {
      "level": "L3",
      "name": "Insight synthesis",
      "description": "Our cross-session interpretation, product implications, organization impact, and PoC recommendations.",
      "usage": "Analytical judgment, not Apple official guidance."
    }
  ],
  "confidence_levels": [
    {
      "grade": "A",
      "label": "Apple official page/feed",
      "meaning": "Direct Apple Developer page, official resource link, or Apple feed metadata."
    },
    {
      "grade": "A-",
      "label": "Apple-source indexed transcript",
      "meaning": "Third-party structured index whose transcript source fields map back to Apple canonical session URLs and pass local consistency checks."
    },
    {
      "grade": "B",
      "label": "Derived synthesis",
      "meaning": "Insight Labs synthesis based on multiple A/A- sources; useful for strategy but not an official Apple statement."
    },
    {
      "grade": "C",
      "label": "Hypothesis / PoC recommendation",
      "meaning": "Actionable but unvalidated recommendation requiring prototype or human review."
    }
  ],
  "current_audit": {
    "audited_at": "2026-06-09",
    "checked_transcripts": 112,
    "source_mismatch_or_empty": 0,
    "internal_mirror_scope": "all WWDC26 sessions with available transcripts",
    "internal_mirror_public_access": "denied_by_nginx"
  },
  "public_language": {
    "zh": "证据等级：A- · Apple-source indexed transcript。本洞察基于 Apple Developer canonical session 页面，以及从 wwdc-sessions 索引源镜像的 transcript segments。脚本 source 字段均回链 Apple Developer session URL。页面中的策略判断、组织影响和 PoC 路线属于 Insight Labs 综合分析，不是 Apple 官方结论。",
    "en": "Evidence grade: A- · Apple-source indexed transcript. This insight is based on Apple canonical session metadata and transcript segments mirrored from the wwdc-sessions indexed source. Transcript source fields map back to Apple Developer session URLs. Strategy, organization impact, and PoC recommendations are Insight Labs synthesis, not Apple official guidance."
  },
  "rules": [
    "Public pages must cite Apple canonical session URLs for factual claims.",
    "Public pages must not republish full transcript text or large transcript excerpts.",
    "Insight synthesis must be labeled as interpretation, not Apple official guidance.",
    "Short quotes, when needed, must be minimal and anchored to Apple canonical URLs.",
    "Internal transcript mirror can be used for analysis, but HTTP access must remain denied."
  ]
}