{
  "tool_id": "art-645-compute-index-weights",
  "kernel_id": "art-645-compute-index-weights",
  "display_name": "Compute Index Weights",
  "tool_version": "1.0.0",
  "mandate_type": "attestation_mandate",
  "purpose": "Computes (or receipts an externally-declared) weight per constituent from a stated methodology (market-cap, float-adjusted-market-cap, equal-weight, price-weight, or factor-tilted) and caller-supplied inputs, giving the weight set its own citable execution_hash separate from the constituent-membership fact in art-557. HARD FENCE: every input row (market_cap/price/float_factor/factor_score) is supplied and asserted, never fetched (zero-egress); this attests THAT a weight set was computed exactly as stated from the declared inputs, never whether those inputs are accurate. weight_sum_check is a hard local check (sum of weights within 1e-9 of 1.0), not a re-fetch. constituents_ref is optional and backward-compatible: a caller with no art-557 artifact yet still gets a valid weighting receipt over its declared constituent list. Second entry of the Financial Index/Benchmark Administrator Lineage family. Not fund NAV recomputation (art-373) or any benchmark-publisher scorecard. EU Benchmark Regulation (BMR, Regulation (EU) 2016/1011) Art 12(1) and SEBI (Index Providers) Regulations, 2024 Reg 18(1)/18(3) citations informative only.",
  "control_description": "Computes (or receipts an externally-declared) weight per constituent from a stated methodology (market-cap, float-adjusted-market-cap, equal-weight, price-weight, or factor-tilted) and caller-supplied inputs, giving the weight set its own citable execution_hash separate from the constituent-membership fact in art-557. HARD FENCE: every input row (market_cap/price/float_factor/factor_score) is supplied and asserted, never fetched (zero-egress); this attests THAT a weight set was computed exactly as stated from the declared inputs, never whether those inputs are accurate. weight_sum_check is a hard local check (sum of weights within 1e-9 of 1.0), not a re-fetch. constituents_ref is optional and backward-compatible: a caller with no art-557 artifact yet still gets a valid weighting receipt over its declared constituent list. Second entry of the Financial Index/Benchmark Administrator Lineage family. Not fund NAV recomputation (art-373) or any benchmark-publisher scorecard. EU Benchmark Regulation (BMR, Regulation (EU) 2016/1011) Art 12(1) and SEBI (Index Providers) Regulations, 2024 Reg 18(1)/18(3) citations informative only.",
  "declared_inputs": [],
  "declared_outputs": [],
  "kernel_digest": "sha256:89e1c42dc3d59ad3566052948cdbe988799613418a705f2fb499bf4c98e981cb",
  "trust_label": "independently verified: zkVM execution proof (risc0/groth16-bn254)",
  "data_vintage": "2026-08-21",
  "last_validated": "2026-08-21",
  "conformance_fixtures_vendored": true,
  "compute_proof_ready": "ready",
  "wave": 104,
  "source_url": "https://ainumbers.co/chaingraph/art-645-compute-index-weights.html",
  "generated_at": "2026-08-22T18:50:53.805Z"
}