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{
  "schema_version": 1,
  "status": "post_hoc_robustness_extension",
  "frozen_at_utc": "2026-07-21T01:18:43Z",
  "protocol_sha256": "ddb15f1810a6046ca250d29ec2b29035c8c73d07dd8a48437b632931dade06ab",
  "procrustes_amendment_sha256": "b2a6d4f071c16ac78c8b34020d601cb15b88ebd7cffcd4e3c9c853bf1f53bc27",
  "identity_null_amendment_sha256": "ec0672e9a7ced15c302c2c374741d6f530d8394c5c297b860d1125141b414aac",
  "implementation_commit": "0f0a2fc7f6ad2cab6f3b4fae0cae724d4c5a9c89",
  "persistence_lineages": 18,
  "checkpoints_per_lineage": 12,
  "matched_null_lineages": 18,
  "identity_null_lineages": 18,
  "random_controls_per_lineage": 32,
  "identity_null_controls_per_cue": 32,
  "raw_report_count": 54,
  "raw_report_hash_ledger": "review_extension_raw_sha256sums.txt",
  "terminal_hash_matches": "18/18",
  "persistence_checkpoint_hash_matches": "216/216",
  "persistence_metrics": [
    "principal_affinity",
    "coordinate_cosine",
    "linear_cka",
    "orthogonal_procrustes_similarity"
  ],
  "frame_gram_max_error": 1.815e-08,
  "claim_boundary": [
    "The extension is post-hoc and cannot replace the prespecified DIAL decision.",
    "Persistence establishes target recoverability, not functional use, hidden-layer persistence, or exclusive subspace confinement.",
    "Identity-null calibration establishes target-specific similarity, not general representational privilege for aligned geometry.",
    "Matched native-output edits establish model sensitivity, not causal organization in humans."
  ]
}