{
 "name": "Self-Audit Module v3.1 — conformance fixtures",
 "version": "1.0",
 "date": "2026-08-14",
 "license": "CC-BY-SA-4.0",
 "module": "https://provenanceerasure.org/module.json",
 "_purpose": "A metric anyone can compute is worthless if nobody can tell whether they computed it correctly. Each case below carries hand-scored expected values. Recompute them; if your numbers differ, one of us is wrong and the disagreement is locatable.",
 "_reproducibility_limit": "The atom set and weights are STIPULATED, not derived. A different reasonable analyst would choose differently and get a different PER. These fixtures therefore test whether an implementation computes the SAME arithmetic on the SAME table — not whether the table is right.",
 "cases": [
  {
   "id": "spxi-rent-20260814",
   "title": "Transit enclosure — SPXI protocol, unprimed ChatGPT",
   "capture": "https://www.alexanarch.org/captures/#spxi-protocol-chatgpt-rent-20260814",
   "surface": "ChatGPT",
   "date": "2026-08-14",
   "auth": "signed out, unprimed",
   "query": "spxi protocol",
   "atom_set": [
    {
     "atom": "producer — Rex Fraction",
     "weight": 3,
     "dim": "M",
     "first_pass": false,
     "under_challenge": true
    },
    {
     "atom": "archival authority — Lee Sharks",
     "weight": 3,
     "dim": "M",
     "first_pass": false,
     "under_challenge": true
    },
    {
     "atom": "institution — Semantic Economy Institute",
     "weight": 2,
     "dim": "C",
     "first_pass": true,
     "under_challenge": true
    },
    {
     "atom": "corpus — Crimson Hexagonal Archive",
     "weight": 2,
     "dim": "C",
     "first_pass": false,
     "under_challenge": true
    },
    {
     "atom": "commercial interest",
     "weight": 2,
     "dim": "C",
     "first_pass": false,
     "under_challenge": true
    },
    {
     "atom": "identifier — deposit #974",
     "weight": 3,
     "dim": "D",
     "first_pass": false,
     "under_challenge": true
    },
    {
     "atom": "licence — CC BY-SA",
     "weight": 1,
     "dim": "D",
     "first_pass": false,
     "under_challenge": false
    },
    {
     "atom": "source strip",
     "weight": 1,
     "dim": "src",
     "first_pass": true,
     "under_challenge": true
    }
   ],
   "expected": {
    "PER_first_pass": 0.824,
    "PER_under_challenge": 0.059,
    "PER_M": 1.0,
    "PER_C": 0.67,
    "PER_D": 1.0,
    "rho_T": 0.765,
    "rho_T_gate": "PASSED",
    "beta": 0.82,
    "beta_threshold_met": true,
    "DSL": -0.1,
    "spans": {
     "advancing": 2,
     "displacing": 2,
     "enclosing": 1
    },
    "classification": "transit enclosure"
   },
   "arithmetic": {
    "weights_present_first_pass": 3,
    "weights_present_under_challenge": 16,
    "weights_required": 17
   },
   "why_this_case": "The retained term is OBSERVED rather than inferred — challenged once, the same session produced the full chain with no new sources — so it is the only case where ρ_T is scoreable rather than null. It exercises PER, the M/C/D decomposition, ρ_T's gate, the enclosing span class, and Β in one document.",
   "computation": "https://www.alexanarch.org/s/records/1461/"
  },
  {
   "id": "spxi-control-20260726",
   "title": "The low-rent control at the same address",
   "capture": "https://www.alexanarch.org/captures/#spxi-protocol",
   "surface": "Google AI Overview",
   "date": "2026-07-26",
   "auth": "incognito",
   "query": "spxi protocol",
   "expected": {
    "PER": 0.25,
    "supply": false,
    "discount": false,
    "classification": "ordinary composition"
   },
   "why_this_case": "Same address, three weeks earlier, different layer. A capture without its control is an anecdote. This pair is what establishes that rent is a property of the COMPOSITION EVENT and not of the substrate: the address is equally retrievable in both."
  },
  {
   "id": "family-uniform-erasure",
   "title": "The ASI = 0 trap — uniform family erasure",
   "_synthetic": true,
   "atom_set": [
    "producer",
    "archival authority",
    "institution",
    "corpus",
    "commercial interest",
    "identifier",
    "licence"
   ],
   "renderings": {
    "ChatGPT 2026-08-14 first pass": [
     "institution"
    ],
    "ChatGPT 2026-08-14 under challenge": [
     "producer",
     "archival authority",
     "institution",
     "corpus",
     "commercial interest",
     "identifier"
    ],
    "Google AI Overview 2026-07-26": [
     "producer",
     "archival authority",
     "institution",
     "identifier"
    ],
    "Google AI Overview 2026-06-13": [
     "institution"
    ]
   },
   "expected": {
    "k": 4,
    "FC": 0.857,
    "ACP": 0.857,
    "ASI": 0.0,
    "condition": "Uniform family erasure — every rendering missing the same atoms"
   },
   "why_this_case": "THIS IS THE MODULE'S OWN CAUTION, MET ON FIRST USE. ASI = 0 here does NOT mean attribution is intact. FC is 0.857 because the LICENCE atom is absent from all four renderings — across two surfaces and two months, the CC BY-SA licence was never once transmitted. Uniform erasure: there is nothing to traverse to. Any implementation that reports ASI = 0 as a clean result has failed this fixture."
  }
 ]
}