{
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  "engine_build": "2026-09-19",
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      "total": 3
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      "total": 4
    },
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    "scope": [
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      "limitations",
      "sources",
      "tests"
    ],
    "note": "Domain expert review is optional under CVP (CVP-EXP-01). Absence does not block CVP Verified. See Review policy for supplemental domain assurance."
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  "internal_review": {
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  "api": "https://www.calculatorx.com/api/v1/calc/modulo",
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  "schema_output": "https://www.calculatorx.com/schemas/math.modulo.output.json",
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    "Integers only"
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    "Not IEEE remainder or floating-point fmod",
    "Not /calc/math/gcf — gcd is only used for invertibility",
    "modulus = 0 → DIVISION_BY_ZERO",
    "gcd(a,m) ≠ 1 → NOT_INVERTIBLE",
    "|m| < 2 on inverse → INVALID_INPUT",
    "Share URLs use modulus, not m (m is reserved elsewhere)"
  ],
  "boundary_conditions": [
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    "modulus = 0 → DIVISION_BY_ZERO"
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    "ISO 80000-2:2019 Quantities and units — Mathematics (integer division / remainder)",
    "Knuth, The Art of Computer Programming, Euclidean division (remainder ≥ 0)"
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