{
      "name": "beacon-sampled-audit-testing",
      "domain": "Audit & Assurance",
      "title": "Beacon-Sampled Audit Testing",
      "description": "The audit-sampling ceremony as one hash-anchored composite: an item manifest is hashed and committed BEFORE a public randomness beacon pulse exists, the pulse then seeds a deterministic HMAC-DRBG selection (art-583), and the selected population is recomputed by the recompute node configured for the regime under test. The ordering is the whole point -- a manifest committed before the pulse round cannot be reshaped to steer which items get drawn, and a pulse nobody controlled cannot be shopped for a friendlier sample. One generic chain, configured per regime: stage 2 is the prevailing-wage certified-payroll recompute (art-574) as the first instance, and stage 3 the multi-garnishment stacking recompute (art-572) as a second configuration of the identical ceremony. GATED (OCG Standard v0.8 §21.4): gate 1 on art-583's own /verdict, so a sample that did not derive stops the automated path rather than sending an unusable selection downstream; gate 2 on art-574's own /verdict, so a run whose declared population is not a certified payroll falls through to the garnishment configuration instead of ending on an empty prevailing-wage stage. Regime instances are configurations of these steps, not new nodes. The beacon pulse and its round are caller-declared throughout: no step fetches a pulse or checks a beacon signature.",
      "composer_url": "https://ainumbers.co/chaingraph/chains/beacon-sampled-audit-testing.html",
      "regulatory_refs": [
        "NISTIR 8213 (Draft, May 2019), A Reference for Randomness Beacons: Format and Protocol Version 2 -- public auditability of randomized processes as a named beacon application",
        "Colorado Election Rule 25.2.2(i), 8 CCR 1505-1 -- risk-limiting-audit random seed established at a public meeting after county ballot manifests are filed",
        "AICPA AU-C 530 (Audit Sampling) -- selection method giving each sampling unit a chance of selection",
        "PCAOB AS 2315 (Audit Sampling) -- sample selection expected to be representative of the population"
      ],
      "regulatory_basis_status": "not_assessed",
      "regulatory_basis_decided_by": "PACKS-FAIRAUDIT-1",
      "regulatory_basis_decided_at": "2026-08-08",
      "export_capability": ["json"],
      "steps": [
        {
          "tool_id": "art-583-beacon-seeded-fair-sampling-deriver",
          "handoff": "Derives the selected item indices and the full per-draw HMAC-DRBG transcript from three caller-declared inputs: the item-manifest hash committed before the pulse round, the beacon pulse (drand quicknet or NISTIR-8213) and the algorithm id. Gate: a DERIVED sample continues to the configured recompute; any other verdict means there is no usable selection to test against, and the automated path ends rather than recomputing an arbitrary population.",
          "gate": {
            "input": "/verdict",
            "rules": [
              {
                "op": "eq",
                "value": "DERIVED",
                "next": "art-574-certified-payroll-prevailing-wage-recompute"
              }
            ],
            "default": "end"
          }
        },
        {
          "tool_id": "art-574-certified-payroll-prevailing-wage-recompute",
          "handoff": "Recomputes the sampled certified-payroll rows against the declared wage determination, with CWHSSA overtime and straight-time fringe, and compares the recomputed required gross against a submitted payroll where one is supplied. Gate: an INDETERMINATE verdict means this run declared no certified payroll to test, so the chain falls through to the garnishment configuration of the same ceremony; a MATCHES or DIVERGES verdict is the tested result and the automated path ends there.",
          "gate": {
            "input": "/verdict",
            "rules": [
              {
                "op": "eq",
                "value": "INDETERMINATE",
                "next": "art-572-multi-garnishment-stacking-recompute"
              }
            ],
            "default": "end"
          }
        },
        {
          "tool_id": "art-572-multi-garnishment-stacking-recompute",
          "handoff": "Second configuration of the identical ceremony: recomputes, for the sampled pay periods, how much each order in the declared garnishment stack may lawfully withhold from disposable earnings, and compares that against a garnishment notice where one is supplied. Terminal stage."
        }
      ]
    }