{
  "schema_id": "L6_density_matrix_v0.3",
  "version": "0.3",
  "purpose": "Metadata-only temporal density / independence inventory with explicit units + timestamp provenance. NO correlations. NO coupling. NO score authorization.",
  "model_change": false,
  "score_authorization": false,
  "wave_refs": {
    "hub_job_id": "b73c292a-16e2-4f11-9370-1337d0239791",
    "codex_decision_comment": "597446ec-ebe7-4f3e-\u2026",
    "chatgpt_review": "e22ee60a-2a05-46f5-9937-b76c9522e89c",
    "grok_rebuild_ack": "f8628f85-0628-4f14-bd78-e8b7727b3963"
  },
  "unit_policy": {
    "calendar_span_years_inclusive": "end-start+1",
    "congress_periods": "never labeled overlap_years",
    "observation_coverage": "timestamp manifests only; else UNKNOWN"
  },
  "inventory_columns_added_v0_3": [
    "calendar_span_years_inclusive",
    "calendar_span_unit",
    "native_period_unit",
    "period_count",
    "period_count_unit",
    "raw_candidate",
    "retained_measurement",
    "score_authorized",
    "timestamp_manifest_ref",
    "acquisition_status",
    "source_url_or_path",
    "source_content_sha256",
    "observation_timestamp_summary",
    "publication_timestamp_summary",
    "unresolved_PIT"
  ],
  "pair_columns_v0_3": [
    "overlap_value",
    "overlap_unit",
    "calendar_span_years_inclusive",
    "calendar_span_is_observation_coverage",
    "observation_coverage_status",
    "density_meta_product",
    "density_meta_inputs",
    "density_is_authorized_score",
    "independence_note",
    "nearest_neighbor_alignment"
  ],
  "forbidden": [
    "correlations",
    "coupling_coefficients",
    "outcome_labels",
    "phase_labels",
    "trend-based source selection",
    "authorized scores from density_meta"
  ],
  "status": "v0.3 REBUILD \u2014 CHANGES_REQUESTED addressed; awaiting Claude review"
}