{
  "protocol": {
    "name": "CVP",
    "version": "1.0.0-proposed"
  },
  "document_status": "proposed",
  "calculator": {
    "id": "percent-change",
    "version": "1.1.0",
    "title": "Percentage Change Calculator",
    "formula_family": "percent_change",
    "capability_id": "math.percent_change",
    "verification_revision": "2026-09-08.signed-set"
  },
  "profile": "core",
  "status": "VERIFIED",
  "runner": {
    "name": "cvp-runner",
    "version": "1.0.0"
  },
  "environment": {
    "runtime": "node",
    "runtime_version": "20.19.2",
    "numeric_model": "IEEE-754 binary64",
    "os": "darwin"
  },
  "suite": {
    "id": "percent-change",
    "version": "1.1.0",
    "uri": "https://www.calculatorx.com/evidence/math.percent_change/1.1.0.json",
    "verification_revision": "2026-09-08.signed-set"
  },
  "obligation_set": [
    "CVP-PROV-01",
    "CVP-MODEL-01",
    "CVP-SCOPE-01",
    "CVP-UNIT-01",
    "CVP-REF-01",
    "CVP-GOLD-01",
    "CVP-BND-01",
    "CVP-INV-01",
    "CVP-NUM-01",
    "CVP-COV-01",
    "CVP-CONTRACT-01",
    "CVP-DEP-01",
    "CVP-ART-01",
    "CVP-PROD-01",
    "CVP-DIM-01",
    "CVP-PROP-01",
    "CVP-META-01",
    "CVP-ROUND-01",
    "CVP-XCAL-01",
    "CVP-IFACE-01"
  ],
  "provenance": {
    "mode": "direct",
    "sources": [
      {
        "label": "Math is Fun — Percentage Difference vs Percentage Error vs Percentage Change",
        "kind": "other",
        "reference": "Percentage change uses |Old| in the denominator",
        "url": "https://www.mathsisfun.com/data/percentage-difference-vs-error.html"
      },
      {
        "label": "Curran-Everett — Explorations in statistics: the analysis of change",
        "kind": "other",
        "reference": "Relative change as (final − initial) / initial",
        "url": "https://journals.physiology.org/doi/full/10.1152/advan.00018.2015"
      },
      {
        "label": "CalculatorX signed-change convention",
        "kind": "other",
        "reference": "|V₁| denominator, piecewise inverse, and multiple V₁ solutions"
      }
    ]
  },
  "reference": {
    "items": [
      {
        "class": "O1",
        "reference_scope": "model",
        "scope": "model",
        "label": "Signed percent change with |V1| denominator"
      },
      {
        "class": "O2",
        "reference_scope": "expected_values",
        "scope": "expected_values",
        "label": "Separate-module percent-change oracle (signed branches + full inverse set)",
        "engine": {
          "name": "percent-change-reference",
          "precision_bits": 53,
          "independent_of_iut": true,
          "same_runtime_as_iut": true,
          "source": "/developers/cvp/reproduce/percent-change-reference.mjs"
        }
      },
      {
        "class": "O2",
        "reference_scope": "numerical_behavior",
        "scope": "numerical_behavior",
        "label": "Same O2 module backs ≤2 ULP value and candidate-set comparison vs IUT",
        "engine": {
          "name": "percent-change-reference",
          "precision_bits": 53,
          "independent_of_iut": true,
          "same_runtime_as_iut": true,
          "source": "/developers/cvp/reproduce/percent-change-reference.mjs"
        }
      }
    ],
    "notes": "Golden expected values come from scripts/lib/cvp/oracles/percent-change-reference.mjs (also published at /developers/cvp/reproduce/percent-change-reference.mjs). That module MUST NOT import the IUT. It shares Node/V8 binary64 with the IUT — declared via same_runtime_as_iut. Inverse expected objects include candidates, solution_type, status, and error codes. Reproduce: node public/developers/cvp/reproduce/check-percent-change-o2.mjs"
  },
  "controls": {
    "CVP-PROV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "Sources present on evidence"
    },
    "CVP-MODEL-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "% change = (V2−V1)/|V1|×100%"
    },
    "CVP-SCOPE-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "V1≠0; solve_for p|v1|v2; inverse V1 can be 0, 1, or 2 solutions"
    },
    "CVP-UNIT-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "percent"
    },
    "CVP-REF-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "O1 model + O2 expected_values + O2 numerical_behavior"
    },
    "CVP-GOLD-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "6/6 legacy golden; 7/7 oracle-backed numeric"
    },
    "CVP-BND-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "2/2 boundary"
    },
    "CVP-INV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "2 Evidence illegal-input + 2/2 oracle-backed error-code (exact_error_match, not ULP)"
    },
    "CVP-NUM-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "max_error_observed_ulp=0; policy declared a priori"
    },
    "CVP-COV-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "5/5 declared partitions (forward, inverse-v2, inverse-v1, invalid-domain, xcal) · 6 golden / 2 boundary unique cases · 2 Evidence invalid-input (may overlap boundary)"
    },
    "CVP-CONTRACT-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "1/1 contract checks"
    },
    "CVP-DEP-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "engine percent-change; Node binary64"
    },
    "CVP-ART-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "release_integrity.status=verified · evidence_digest=CVP verification fingerprint v2 (canonical inputs, expected/actual/status, policy, versions; independent of generated_at) · evidence_bundle_sha256=legacy Evidence JSON bytes · production_sha256=bound production attestation report"
    },
    "CVP-PROD-01": {
      "result": "PASS",
      "applicability": "required",
      "notes": "CURRENT · site report pass · local checks pass · attestation_id=00c818a77ba026c2d6aa3f7402680cd2dac2a40a816209600bc3c3fcd0b8921c · CURRENT · Public schema 1.1.0 matches · Semantic contract ✓ · Production attested · Public/cache ✓ · Origin ✓ · schema_const=1.1.0 · report output-const=pass · evidence-sha256=pass · semantic-contract=pass · capability-html-public-origin-agree=pass · cvp-manifest-public-origin-agree=pass · cvp-reproduce-manifest-agree=pass · calculator-html-cvp-projection=pass · evidence-html-cvp-projection=pass · attested_evidence_sha256=9424f31d3ca937ec4a453e41479201945df6495214f0a220ebb742e7fd1c3f20"
    },
    "CVP-DIM-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "relative change"
    },
    "CVP-PROP-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "5/5 property"
    },
    "CVP-META-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "1/1 metamorphic"
    },
    "CVP-ROUND-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "4/4 round-trips"
    },
    "CVP-XCAL-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "3/3 cross-calculator · xcal-pc-40-50 PASS vs math.percentage; xcal-pc-neg100-neg50 PASS vs math.percentage; xcal-pc-old0 PASS vs math.percentage; xcal-pe-na N/A (Percent error is listed as a related tool. It encodes |experimental−true|/|true|, not Δ%=100×(new−old)/|old|.); xcal-vat-na N/A (VAT is listed as a related finance tool. It does not encode the |old| percent-change identity.); xcal-compound-na N/A (Compound interest is listed as a related growth tool. It compounds over periods; it does not encode a one-step |V1| percent change.)"
    },
    "CVP-IFACE-01": {
      "result": "PASS",
      "applicability": "applicable",
      "notes": "UI (SSR) · REST · MCP equivalent (MCP uses calc API handler). ui-ssr is query-result HTML, not a live browser session."
    },
    "CVP-ORACLE-01": {
      "result": "SKIP",
      "applicability": "higher_assurance",
      "notes": "O2 present; O3 not required this wave"
    },
    "CVP-EXP-01": {
      "result": "SKIP",
      "applicability": "optional",
      "notes": "expert_reviewed=false"
    }
  },
  "tests": {
    "golden": {
      "passed": 7,
      "total": 7,
      "failed": 0,
      "case_ids": [
        "g-up20",
        "g-solve-v2",
        "g-neg-start",
        "g-solve-v2-neg",
        "g-two-v1",
        "g-infinite-neg100",
        "g-infinite-pos100"
      ]
    },
    "boundary": {
      "passed": 2,
      "total": 2,
      "failed": 0,
      "case_ids": [
        "zero-initial",
        "no-initial-neg-100"
      ]
    },
    "invalid": {
      "passed": 4,
      "total": 4,
      "failed": 0,
      "case_ids": [
        "zero-initial",
        "no-initial-neg-100",
        "g-no-v1",
        "g-v1-zero"
      ],
      "comparison": "exact_error_match",
      "records": [
        {
          "id": "g-no-v1",
          "comparison": "exact_error_match",
          "expected": {
            "code": "NO_REAL_SOLUTION"
          },
          "actual": {
            "code": "NO_REAL_SOLUTION"
          },
          "match": true
        },
        {
          "id": "g-v1-zero",
          "comparison": "exact_error_match",
          "expected": {
            "code": "INITIAL_VALUE_ZERO"
          },
          "actual": {
            "code": "INITIAL_VALUE_ZERO"
          },
          "match": true
        }
      ]
    },
    "property": {
      "passed": 5,
      "total": 5,
      "failed": 0,
      "case_ids": [
        "prop-zero-change",
        "prop-plus20",
        "prop-neg-start",
        "prop-two-v1",
        "prop-infinite-neg100"
      ],
      "definition_ids": [
        "same-values",
        "known-increase",
        "signed-negative-initial",
        "signed-inverse-two-candidates",
        "infinite-neg-100"
      ]
    },
    "round_trip": {
      "passed": 4,
      "total": 4,
      "failed": 0,
      "case_ids": [
        "rt-v2",
        "rt-neg-v2",
        "rt-two-v1",
        "rt-two-v1-member"
      ]
    },
    "metamorphic": {
      "passed": 1,
      "total": 1,
      "failed": 0,
      "case_ids": [
        "meta-scale-both"
      ],
      "definition_ids": [
        "scale-both"
      ]
    },
    "contract": {
      "passed": 1,
      "total": 1,
      "failed": 0
    },
    "cross_interface": {
      "passed": 1,
      "total": 1,
      "failed": 0,
      "case_ids": [
        "iface-pc"
      ]
    },
    "cross_calculator": {
      "passed": 3,
      "total": 3,
      "failed": 0,
      "case_ids": [
        "xcal-pc-40-50",
        "xcal-pc-neg100-neg50",
        "xcal-pc-old0"
      ]
    }
  },
  "coverage": {
    "partitions": [
      {
        "id": "forward",
        "description": "Forward % change from V1, V2",
        "exercised": true,
        "case_count": 16
      },
      {
        "id": "inverse-v2",
        "description": "Solve final V2",
        "exercised": true,
        "case_count": 3
      },
      {
        "id": "inverse-v1",
        "description": "Solve initial V1",
        "exercised": true,
        "case_count": 7
      },
      {
        "id": "invalid-domain",
        "description": "Invalid inputs",
        "exercised": true,
        "case_count": 4
      },
      {
        "id": "xcal",
        "description": "Cross-calculator |old| identity vs Percentage Change mode; Percent error / VAT / Compound interest N/A",
        "exercised": true,
        "case_count": 3
      }
    ]
  },
  "numerical": {
    "representation": "IEEE-754 binary64 signed percent change",
    "tolerance": {
      "type": "ulp",
      "value": 2,
      "rationale": "Independent (V₂−V₁)/|V₁|×100 vs IUT; ≤2 ULP on value and each inverse candidate. Declared a priori.",
      "declared_before_evaluation": true
    },
    "max_error_observed": 0,
    "records": [
      {
        "id": "g-up20",
        "reference": {
          "solve_for": "p",
          "value": 20,
          "v1": 60,
          "v2": 72,
          "percent_change": 20,
          "status": "success",
          "solution_type": "unique"
        },
        "actual": {
          "solve_for": "p",
          "value": 20,
          "v1": 60,
          "v2": 72,
          "p": 20,
          "percent_change": 20,
          "solution_type": "unique",
          "status": "success",
          "direction": "increase",
          "rounding": {
            "mode": "auto",
            "significant_digits": 10,
            "trailing_zeros": "stripped"
          },
          "calculation_version": "1.1.0",
          "formula": "% change = (V₂ − V₁) / |V₁| × 100%",
          "display": {
            "percent_change": "+20%",
            "value": "+20%"
          },
          "delta": 12,
          "abs_v1": 60,
          "signed_factor": 1.2,
          "multiplier": 1.2,
          "percent_of_initial": 120
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "fields": {
          "status": {
            "ok": true
          },
          "solution_type": {
            "ok": true
          },
          "value": {
            "ok": true,
            "error_ulp": 0
          }
        }
      },
      {
        "id": "g-solve-v2",
        "reference": {
          "solve_for": "v2",
          "value": 72,
          "v1": 60,
          "v2": 72,
          "percent_change": 20,
          "status": "success",
          "solution_type": "unique"
        },
        "actual": {
          "solve_for": "v2",
          "value": 72,
          "v1": 60,
          "v2": 72,
          "p": 20,
          "percent_change": 20,
          "solution_type": "unique",
          "status": "success",
          "direction": "increase",
          "rounding": {
            "mode": "auto",
            "significant_digits": 10,
            "trailing_zeros": "stripped"
          },
          "calculation_version": "1.1.0",
          "formula": "V₂ = V₁ + (P/100)·|V₁|",
          "display": {
            "percent_change": "+20%",
            "value": "72"
          },
          "delta": 12,
          "abs_v1": 60,
          "signed_factor": 1.2,
          "multiplier": 1.2,
          "percent_of_initial": 120,
          "formula_branch": "V₂ = V₁(1 + P/100)"
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "fields": {
          "status": {
            "ok": true
          },
          "solution_type": {
            "ok": true
          },
          "value": {
            "ok": true,
            "error_ulp": 0
          }
        }
      },
      {
        "id": "g-neg-start",
        "reference": {
          "solve_for": "p",
          "value": 200,
          "v1": -25,
          "v2": 25,
          "percent_change": 200,
          "status": "success",
          "solution_type": "unique"
        },
        "actual": {
          "solve_for": "p",
          "value": 200,
          "v1": -25,
          "v2": 25,
          "p": 200,
          "percent_change": 200,
          "solution_type": "unique",
          "status": "success",
          "direction": "increase",
          "rounding": {
            "mode": "auto",
            "significant_digits": 10,
            "trailing_zeros": "stripped"
          },
          "calculation_version": "1.1.0",
          "formula": "% change = (V₂ − V₁) / |V₁| × 100%",
          "display": {
            "percent_change": "+200%",
            "value": "+200%"
          },
          "delta": 50,
          "abs_v1": 25,
          "signed_factor": -1,
          "multiplier": -1,
          "percent_of_initial": -100
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "fields": {
          "status": {
            "ok": true
          },
          "solution_type": {
            "ok": true
          },
          "value": {
            "ok": true,
            "error_ulp": 0
          }
        }
      },
      {
        "id": "g-solve-v2-neg",
        "reference": {
          "solve_for": "v2",
          "value": 25,
          "v1": -25,
          "v2": 25,
          "percent_change": 200,
          "status": "success",
          "solution_type": "unique"
        },
        "actual": {
          "solve_for": "v2",
          "value": 25,
          "v1": -25,
          "v2": 25,
          "p": 200,
          "percent_change": 200,
          "solution_type": "unique",
          "status": "success",
          "direction": "increase",
          "rounding": {
            "mode": "auto",
            "significant_digits": 10,
            "trailing_zeros": "stripped"
          },
          "calculation_version": "1.1.0",
          "formula": "V₂ = V₁ + (P/100)·|V₁|",
          "display": {
            "percent_change": "+200%",
            "value": "25"
          },
          "delta": 50,
          "abs_v1": 25,
          "signed_factor": -1,
          "multiplier": -1,
          "percent_of_initial": -100,
          "formula_branch": "V₂ = V₁(1 − P/100)"
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "fields": {
          "status": {
            "ok": true
          },
          "solution_type": {
            "ok": true
          },
          "value": {
            "ok": true,
            "error_ulp": 0
          }
        }
      },
      {
        "id": "g-two-v1",
        "reference": {
          "solve_for": "v1",
          "value": 8.333333333333334,
          "v1": null,
          "v2": 25,
          "percent_change": 200,
          "status": "multiple_solutions",
          "solution_type": "two",
          "candidates": [
            8.333333333333334,
            -25
          ],
          "solutions": [
            8.333333333333334,
            -25
          ]
        },
        "actual": {
          "solve_for": "v1",
          "value": 8.333333333333334,
          "v1": null,
          "v2": 25,
          "p": 200,
          "percent_change": 200,
          "solutions": [
            8.333333333333334,
            -25
          ],
          "candidates": [
            8.333333333333334,
            -25
          ],
          "solution_type": "two",
          "status": "multiple_solutions",
          "direction": "increase",
          "rounding": {
            "mode": "auto",
            "significant_digits": 10,
            "trailing_zeros": "stripped"
          },
          "calculation_version": "1.1.0",
          "formula": "V₁ = V₂/(1±P/100) with signed |V₁| branches",
          "display": {
            "percent_change": "+200%",
            "value": "8.333333333 or -25"
          },
          "delta": null,
          "abs_v1": null,
          "signed_factor": null,
          "multiplier": null,
          "percent_of_initial": null,
          "branches": [
            {
              "v1": 8.333333333333334,
              "branch": "positive",
              "formula": "V₁ = V₂ / (1 + P/100)"
            },
            {
              "v1": -25,
              "branch": "negative",
              "formula": "V₁ = V₂ / (1 − P/100)"
            }
          ]
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "fields": {
          "status": {
            "ok": true
          },
          "solution_type": {
            "ok": true
          },
          "candidates": {
            "ok": true,
            "error_ulp": 0
          }
        }
      },
      {
        "id": "g-infinite-neg100",
        "reference": {
          "solve_for": "v1",
          "value": null,
          "v1": null,
          "v2": 0,
          "percent_change": -100,
          "status": "infinite",
          "solution_type": "infinite",
          "code": "INFINITELY_MANY",
          "constraint": "V₁ > 0"
        },
        "actual": {
          "solve_for": "v1",
          "value": null,
          "v1": null,
          "v2": 0,
          "p": -100,
          "percent_change": -100,
          "status": "infinite",
          "code": "INFINITELY_MANY",
          "solution_type": "infinite",
          "constraint": "V₁ > 0",
          "rounding": {
            "mode": "auto",
            "significant_digits": 10,
            "trailing_zeros": "stripped"
          },
          "calculation_version": "1.1.0",
          "formula": "V₂ = V₁ + (P/100)·|V₁|",
          "display": {
            "percent_change": "-100%",
            "value": "any V₁ > 0"
          },
          "message": "Any positive initial value satisfies a −100% change to final 0, because V₂ = V₁ − |V₁| = 0 when V₁ > 0. V₁ = 0 remains undefined."
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "fields": {
          "status": {
            "ok": true
          },
          "code": {
            "ok": true
          },
          "solution_type": {
            "ok": true
          },
          "constraint": {
            "ok": true
          }
        }
      },
      {
        "id": "g-infinite-pos100",
        "reference": {
          "solve_for": "v1",
          "value": null,
          "v1": null,
          "v2": 0,
          "percent_change": 100,
          "status": "infinite",
          "solution_type": "infinite",
          "code": "INFINITELY_MANY",
          "constraint": "V₁ < 0"
        },
        "actual": {
          "solve_for": "v1",
          "value": null,
          "v1": null,
          "v2": 0,
          "p": 100,
          "percent_change": 100,
          "status": "infinite",
          "code": "INFINITELY_MANY",
          "solution_type": "infinite",
          "constraint": "V₁ < 0",
          "rounding": {
            "mode": "auto",
            "significant_digits": 10,
            "trailing_zeros": "stripped"
          },
          "calculation_version": "1.1.0",
          "formula": "V₂ = V₁ + (P/100)·|V₁|",
          "display": {
            "percent_change": "+100%",
            "value": "any V₁ < 0"
          },
          "message": "Any negative initial value satisfies a +100% change to final 0, because V₂ = V₁ + |V₁| = 0 when V₁ < 0. V₁ = 0 remains undefined."
        },
        "error_ulp": 0,
        "threshold_ulp": 2,
        "fields": {
          "status": {
            "ok": true
          },
          "code": {
            "ok": true
          },
          "solution_type": {
            "ok": true
          },
          "constraint": {
            "ok": true
          }
        }
      }
    ]
  },
  "interfaces": {
    "compared": [
      "ui-ssr",
      "rest",
      "mcp"
    ],
    "result": "PASS",
    "notes": "UI (SSR) · REST · MCP equivalent (MCP uses calc API handler). ui-ssr is query-result HTML, not a live browser session."
  },
  "artifacts": {
    "evidence_bundle_sha256": "419be9d36ca212e1f31369576f0af4ea65edd49d75924f7fe14d71f1f5e6bd84",
    "evidence_digest": "a7b9f7091c43c5bcbbe43d4be80b6d8bf8da4dc19f2e908b2b261cd959c5b968",
    "production_sha256": "9424f31d3ca937ec4a453e41479201945df6495214f0a220ebb742e7fd1c3f20",
    "attested_catalog_sha256": "e03ef81b30568018b171fd1fc4757c2abe9df7220d9ff35bbaf08038d7630cdb",
    "production_checks": [
      {
        "id": "math.percent_change:output-const",
        "status": "pass",
        "detail": "output const 1.1.0 vs capability 1.1.0",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      },
      {
        "id": "math.percent_change:evidence-sha256",
        "status": "pass",
        "detail": "10f1159b516c",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      },
      {
        "id": "math.percent_change:semantic-contract",
        "status": "pass",
        "detail": "8/8",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      },
      {
        "id": "math.percent_change:capability-html-public-origin-agree",
        "status": "pass",
        "detail": "public 1.1.0 vs origin 1.1.0",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      },
      {
        "id": "math.percent_change:cvp-manifest-public-origin-agree",
        "status": "pass",
        "detail": "math.percent_change/1.1.0/2026-09-08.signed-set/core/a7b9f7091c43",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z",
        "projection_compared": false,
        "observed_live_projection_at_attestation": "VERIFIED"
      },
      {
        "id": "math.percent_change:cvp-reproduce-manifest-agree",
        "status": "pass",
        "detail": "O3 reproduce not applicable",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      },
      {
        "id": "math.percent_change:calculator-html-cvp-projection",
        "status": "pass",
        "detail": "matches Manifest",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      },
      {
        "id": "math.percent_change:evidence-html-cvp-projection",
        "status": "pass",
        "detail": "matches Manifest",
        "scope": "last_attestation_snapshot",
        "current": true,
        "attestation_binding_current": true,
        "attested_at": "2026-09-10T02:52:51.379Z"
      }
    ]
  },
  "dependencies": [
    {
      "name": "percent-change-engine",
      "version": "1.1.0"
    },
    {
      "name": "percent-change-reference-oracle",
      "version": "1.0.0"
    },
    {
      "name": "math.percentage",
      "version": "1.1.1",
      "role": "cross_calculator_peer",
      "capability_id": "math.percentage",
      "evidence_digest": "e1b745d8821224141ebfee2bf2a4a250c5f4809eb79e8f583e8b1455e2cd9912",
      "evidence": "https://www.calculatorx.com/evidence/math.percentage/1.1.1.cvp.json"
    },
    {
      "name": "node",
      "version": "20.19.2"
    }
  ],
  "attestation": {
    "status": "CURRENT",
    "href": "/.well-known/calculatorx-production-attestation.json",
    "id": "00c818a77ba026c2d6aa3f7402680cd2dac2a40a816209600bc3c3fcd0b8921c",
    "attested_at": "2026-09-10T02:52:51.379Z"
  },
  "domain_review": {
    "status": "ABSENT",
    "spec_version": "1.1.0"
  },
  "timestamps": {
    "verified_at": "2026-09-10T03:41:49.442Z",
    "generated_at": "2026-09-10T03:41:49.442Z"
  },
  "links": {
    "legacy_evidence": "https://www.calculatorx.com/evidence/math.percent_change/1.1.0.json",
    "evidence_page": "https://www.calculatorx.com/evidence/math.percent_change/1.1.0",
    "calculator": "https://www.calculatorx.com/calc/math/percentage-change",
    "schema": "https://www.calculatorx.com/developers/cvp/schema/cvp-evidence-1.0.json",
    "protocol": "https://www.calculatorx.com/developers/cvp/spec/1.0",
    "manifest": "https://www.calculatorx.com/evidence/math.percent_change/1.1.0.cvp.json",
    "manifest_immutable": "https://www.calculatorx.com/evidence/math.percent_change/1.1.0/2026-09-08.signed-set.cvp.json",
    "reproduce": "https://www.calculatorx.com/evidence/math.percent_change/reproduce",
    "o2_oracle": "https://www.calculatorx.com/developers/cvp/reproduce/percent-change-reference.mjs",
    "o2_checker": "https://www.calculatorx.com/developers/cvp/reproduce/check-percent-change-o2.mjs"
  }
}