{
  "tool_id": "art-309-parametric-index-deriver",
  "kernel_id": "art-309-parametric-index-deriver",
  "display_name": "Parametric Index Deriver",
  "tool_version": "1.0.0",
  "mandate_type": "compliance_mandate",
  "purpose": "Deterministically aggregates a named metric (mean, sum, count, max, or min) across a receipt set into a parametric index value: receipts as an oracle replacement, replay-on-challenge instead of trust-the-feed. Feeds the shipped compute_parametric_trigger_payout kernel, which performs the actual trigger-vs-payout math; this kernel never reimplements that logic. The index is a replayable derived value, never a settlement trigger by itself. Not the same as check_agency_eligibility_matrix or any lending eligibility tool -- this is an insurance-evidence parametric index. Zero network, zero PII.",
  "control_description": "Deterministically aggregates a named metric (mean, sum, count, max, or min) across a receipt set into a parametric index value: receipts as an oracle replacement, replay-on-challenge instead of trust-the-feed. Feeds the shipped compute_parametric_trigger_payout kernel, which performs the actual trigger-vs-payout math; this kernel never reimplements that logic. The index is a replayable derived value, never a settlement trigger by itself. Not the same as check_agency_eligibility_matrix or any lending eligibility tool -- this is an insurance-evidence parametric index. Zero network, zero PII.",
  "declared_inputs": [],
  "declared_outputs": [
    "art-251-compute-parametric-trigger-payout"
  ],
  "kernel_digest": "sha256:69501cd554f59d8ca92176964a10773dad63d5b7c1e4ae06af5eda6fbe9d29c6",
  "trust_label": "deferred -- deterministic source published, zkVM proof not yet generated",
  "data_vintage": "2026-07-10",
  "last_validated": "2026-07-10",
  "conformance_fixtures_vendored": true,
  "compute_proof_ready": "ready",
  "wave": 54,
  "source_url": "https://ainumbers.co/chaingraph/art-309-parametric-index-deriver.html",
  "generated_at": "2026-07-25T20:02:55.601Z"
}