{
 "axis": "mcp",
 "axis_status": "MEASURED",
 "content_id": "84f521b2182782b9f85ebb062c981c193c9399c255c40346722478c7608071f1",
 "elo_decided_games": 5,
 "elo_leader": null,
 "elo_leader_score": null,
 "elo_ranked_models": 0,
 "elo_runner_up": null,
 "elo_separation": "UNMEASURED",
 "elo_source": {
  "content_id": "e35b71656d87f5bf01f59d45beab4107784b29e8ea4a9e436899c7708d8e232d",
  "generated": "2026-09-24T03:36:56Z",
  "path": "/arena/elo_reference.json",
  "schema": "csoai.arena-elo-reference/0.2"
 },
 "elo_ties": 58,
 "elo_top": null,
 "evidence_relation": "SEPARATE_EVIDENCE",
 "evidence_relation_note": "Never add, reconcile or substitute the two (cf. corpus_relation SEPARATE_CORPORA). Board: per-item accuracy on a frozen bank. Here: win-rate over recorded pairwise rounds. Board leader none is NOT among the models ranked here (none). Fleet overlap UNMEASURED: no per-axis fleet roster is published and none is invented.",
 "games_leader": null,
 "generated": "2026-09-24T03:36:57Z",
 "majority_baseline": 0.5143,
 "models": 19,
 "not_a_certification": true,
 "note": "From the axis register + the per-axis Elo reference rebuilt from recorded rounds (deterministic grader on frozen banks). Thin-n axes say so. scored_items/models/majority_baseline are REGISTER fields about the axis's frozen bank, not these rounds. Measurement, not certification.",
 "rank_rule": "arena rule: >=2 models with >=5 decided games each and ONE model's Wilson 95% win-rate CI lower bound above EVERY other ranked model's upper bound; else TIE. UNMEASURED = not enough to rank. On win-rate intervals, never path-dependent Elo order.",
 "register": "UNTESTED",
 "schema": "csoai.axis-signal/0.4",
 "scored_items": 35,
 "separation_authority": {
  "board_axis": "conformance",
  "board_bench": "MCPBench",
  "board_leader": null,
  "board_n": 35,
  "board_separation": "UNTESTED",
  "note": "This axis's separation authority. status/register are ITS verdict. Where elo_separation differs, the board governs the AXIS separation; this file governs only the arena rounds.",
  "surface": "GET /api/gspc"
 },
 "separation_of": "recorded pairwise arena rounds, NOT the axis's frozen bank; never the axis's verdict.",
 "signature": {
  "alg": "Ed25519",
  "canonical": "JSON.stringify of key-sorted object, UTF-8; int-valued floats as ints (functions/_lib/cardSign.ts canonicalBytes)",
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  "payload_sha256": "84f521b2182782b9f85ebb062c981c193c9399c255c40346722478c7608071f1",
  "preimage": "canonical(body minus content_id, signature)",
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  "signer_auth": "pod-token",
  "verify": "sha256(canonical preimage) == payload_sha256; Ed25519 verify sig_ed25519 (hex) over the canonical preimage bytes with the #board-attestation-1 key in https://csoai.org/.well-known/did.json"
 },
 "signer": "did:web:csoai.org#board-attestation-1",
 "status": "UNTESTED",
 "supersedes": {
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  "elo_leader_then": null,
  "generated": "2026-09-24T02:37:28Z",
  "note": "superseded, never edited; new bytes, new signature",
  "signer": "did:web:csoai.org#board-attestation-1",
  "status_then": "UNTESTED"
 }
}