{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.calculatorx.com/schemas/math.percent_change/1.1.1/output.json",
  "title": "Percentage change — success output",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "status",
    "capability_id",
    "engine",
    "inputs",
    "result",
    "result_detail",
    "calculation_version",
    "verification",
    "review"
  ],
  "properties": {
    "id": {
      "type": "string",
      "description": "Requested tool id"
    },
    "status": {
      "const": "success"
    },
    "capability_id": {
      "const": "math.percent_change"
    },
    "tool": {
      "type": "string",
      "description": "Requested tool id"
    },
    "engine": {
      "type": "string"
    },
    "inputs": {
      "description": "Normalized calculation inputs (aliases resolved to canonical form)",
      "oneOf": [
        {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "solve_for": {
              "const": "p"
            },
            "v1": {
              "type": "number"
            },
            "v2": {
              "type": "number"
            },
            "p": {
              "type": "number"
            }
          },
          "required": [
            "solve_for",
            "v1",
            "v2"
          ]
        },
        {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "solve_for": {
              "const": "v1"
            },
            "v1": {
              "type": "number"
            },
            "v2": {
              "type": "number"
            },
            "p": {
              "type": "number"
            }
          },
          "required": [
            "solve_for",
            "v2",
            "p"
          ]
        },
        {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "solve_for": {
              "const": "v2"
            },
            "v1": {
              "type": "number"
            },
            "v2": {
              "type": "number"
            },
            "p": {
              "type": "number"
            }
          },
          "required": [
            "solve_for",
            "v1",
            "p"
          ]
        }
      ]
    },
    "result": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "solve_for",
        "value",
        "v1",
        "v2",
        "p",
        "percent_change",
        "status",
        "solution_type",
        "direction",
        "rounding",
        "display",
        "formula",
        "calculation_version",
        "steps"
      ],
      "properties": {
        "solve_for": {
          "type": "string"
        },
        "status": {
          "enum": [
            "success",
            "multiple_solutions",
            "infinite",
            "inconsistent"
          ]
        },
        "solution_type": {
          "type": "string"
        },
        "direction": {
          "type": "string"
        },
        "code": {
          "type": "string"
        },
        "formula": {
          "type": "string"
        },
        "formula_branch": {
          "type": "string"
        },
        "constraint": {
          "type": "string"
        },
        "message": {
          "type": "string"
        },
        "calculation_version": {
          "const": "1.1.1"
        },
        "p": {
          "type": "number"
        },
        "v2": {
          "type": "number"
        },
        "percent_change": {
          "type": "number"
        },
        "entered_percent_change": {
          "type": "number"
        },
        "v1": {
          "type": [
            "number",
            "null"
          ]
        },
        "value": {
          "type": [
            "number",
            "null"
          ]
        },
        "delta": {
          "type": [
            "number",
            "null"
          ]
        },
        "abs_v1": {
          "type": [
            "number",
            "null"
          ]
        },
        "signed_factor": {
          "type": [
            "number",
            "null"
          ]
        },
        "multiplier": {
          "type": [
            "number",
            "null"
          ]
        },
        "percent_of_initial": {
          "type": [
            "number",
            "null"
          ]
        },
        "solutions": {
          "type": "array",
          "minItems": 2,
          "maxItems": 2,
          "items": {
            "type": "number"
          }
        },
        "candidates": {
          "type": "array",
          "minItems": 2,
          "maxItems": 2,
          "items": {
            "type": "number"
          }
        },
        "rounding": {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "mode": {
              "const": "nearest_ties_even"
            },
            "significant_digits": {
              "const": 17
            },
            "trailing_zeros": {
              "const": "shortest_roundtrip"
            }
          },
          "required": [
            "mode",
            "significant_digits",
            "trailing_zeros"
          ]
        },
        "display": {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "value": {
              "type": "string"
            },
            "percent_change": {
              "type": "string"
            }
          },
          "required": [
            "value",
            "percent_change"
          ]
        },
        "steps": {
          "type": "array",
          "minItems": 3,
          "items": {
            "type": "string"
          }
        },
        "resolution_limited": {
          "type": "boolean"
        },
        "branches": {
          "type": "array",
          "minItems": 2,
          "maxItems": 2,
          "items": {
            "type": "object",
            "additionalProperties": false,
            "properties": {
              "v1": {
                "type": "number"
              },
              "branch": {
                "enum": [
                  "positive",
                  "negative"
                ]
              },
              "formula": {
                "type": "string"
              }
            },
            "required": [
              "v1",
              "branch",
              "formula"
            ]
          }
        },
        "omitted_branches": {
          "type": "array",
          "items": {
            "type": "object",
            "additionalProperties": false,
            "properties": {
              "branch": {
                "type": "string"
              },
              "assumed": {
                "type": "string"
              },
              "code": {
                "type": "string"
              }
            },
            "required": [
              "branch",
              "assumed",
              "code"
            ]
          }
        }
      },
      "oneOf": [
        {
          "properties": {
            "status": {
              "const": "success"
            }
          },
          "required": [
            "delta",
            "abs_v1",
            "signed_factor",
            "multiplier",
            "percent_of_initial"
          ]
        },
        {
          "properties": {
            "status": {
              "const": "multiple_solutions"
            }
          },
          "required": [
            "candidates",
            "solutions",
            "branches"
          ]
        },
        {
          "properties": {
            "status": {
              "const": "infinite"
            }
          },
          "required": [
            "constraint",
            "code"
          ]
        },
        {
          "properties": {
            "status": {
              "const": "inconsistent"
            }
          },
          "required": [
            "entered_percent_change",
            "code"
          ]
        }
      ]
    },
    "result_detail": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "value",
        "unit",
        "formatted"
      ],
      "properties": {
        "value": {
          "type": "object",
          "additionalProperties": false,
          "required": [
            "solve_for",
            "value",
            "v1",
            "v2",
            "p",
            "percent_change",
            "status",
            "solution_type",
            "direction",
            "rounding",
            "display",
            "formula",
            "calculation_version",
            "steps"
          ],
          "properties": {
            "solve_for": {
              "type": "string"
            },
            "status": {
              "enum": [
                "success",
                "multiple_solutions",
                "infinite",
                "inconsistent"
              ]
            },
            "solution_type": {
              "type": "string"
            },
            "direction": {
              "type": "string"
            },
            "code": {
              "type": "string"
            },
            "formula": {
              "type": "string"
            },
            "formula_branch": {
              "type": "string"
            },
            "constraint": {
              "type": "string"
            },
            "message": {
              "type": "string"
            },
            "calculation_version": {
              "const": "1.1.1"
            },
            "p": {
              "type": "number"
            },
            "v2": {
              "type": "number"
            },
            "percent_change": {
              "type": "number"
            },
            "entered_percent_change": {
              "type": "number"
            },
            "v1": {
              "type": [
                "number",
                "null"
              ]
            },
            "value": {
              "type": [
                "number",
                "null"
              ]
            },
            "delta": {
              "type": [
                "number",
                "null"
              ]
            },
            "abs_v1": {
              "type": [
                "number",
                "null"
              ]
            },
            "signed_factor": {
              "type": [
                "number",
                "null"
              ]
            },
            "multiplier": {
              "type": [
                "number",
                "null"
              ]
            },
            "percent_of_initial": {
              "type": [
                "number",
                "null"
              ]
            },
            "solutions": {
              "type": "array",
              "minItems": 2,
              "maxItems": 2,
              "items": {
                "type": "number"
              }
            },
            "candidates": {
              "type": "array",
              "minItems": 2,
              "maxItems": 2,
              "items": {
                "type": "number"
              }
            },
            "rounding": {
              "type": "object",
              "additionalProperties": false,
              "properties": {
                "mode": {
                  "const": "nearest_ties_even"
                },
                "significant_digits": {
                  "const": 17
                },
                "trailing_zeros": {
                  "const": "shortest_roundtrip"
                }
              },
              "required": [
                "mode",
                "significant_digits",
                "trailing_zeros"
              ]
            },
            "display": {
              "type": "object",
              "additionalProperties": false,
              "properties": {
                "value": {
                  "type": "string"
                },
                "percent_change": {
                  "type": "string"
                }
              },
              "required": [
                "value",
                "percent_change"
              ]
            },
            "steps": {
              "type": "array",
              "minItems": 3,
              "items": {
                "type": "string"
              }
            },
            "resolution_limited": {
              "type": "boolean"
            },
            "branches": {
              "type": "array",
              "minItems": 2,
              "maxItems": 2,
              "items": {
                "type": "object",
                "additionalProperties": false,
                "properties": {
                  "v1": {
                    "type": "number"
                  },
                  "branch": {
                    "enum": [
                      "positive",
                      "negative"
                    ]
                  },
                  "formula": {
                    "type": "string"
                  }
                },
                "required": [
                  "v1",
                  "branch",
                  "formula"
                ]
              }
            },
            "omitted_branches": {
              "type": "array",
              "items": {
                "type": "object",
                "additionalProperties": false,
                "properties": {
                  "branch": {
                    "type": "string"
                  },
                  "assumed": {
                    "type": "string"
                  },
                  "code": {
                    "type": "string"
                  }
                },
                "required": [
                  "branch",
                  "assumed",
                  "code"
                ]
              }
            }
          },
          "oneOf": [
            {
              "properties": {
                "status": {
                  "const": "success"
                }
              },
              "required": [
                "delta",
                "abs_v1",
                "signed_factor",
                "multiplier",
                "percent_of_initial"
              ]
            },
            {
              "properties": {
                "status": {
                  "const": "multiple_solutions"
                }
              },
              "required": [
                "candidates",
                "solutions",
                "branches"
              ]
            },
            {
              "properties": {
                "status": {
                  "const": "infinite"
                }
              },
              "required": [
                "constraint",
                "code"
              ]
            },
            {
              "properties": {
                "status": {
                  "const": "inconsistent"
                }
              },
              "required": [
                "entered_percent_change",
                "code"
              ]
            }
          ]
        },
        "unit": {
          "type": [
            "string",
            "null"
          ]
        },
        "formatted": {
          "type": [
            "string",
            "null"
          ]
        }
      }
    },
    "formula": {
      "anyOf": [
        {
          "type": "null"
        },
        {
          "type": "string"
        },
        {
          "type": "object",
          "additionalProperties": false,
          "properties": {
            "id": {
              "type": "string"
            },
            "expression": {
              "type": "string"
            },
            "label": {
              "type": "string"
            }
          }
        }
      ]
    },
    "assumptions": {
      "type": "array",
      "items": {
        "type": "string"
      }
    },
    "warnings": {
      "type": "array",
      "items": {
        "type": "object",
        "additionalProperties": false,
        "required": [
          "code"
        ],
        "properties": {
          "code": {
            "type": "string"
          },
          "severity": {
            "type": "string"
          },
          "detail": {
            "type": "string"
          },
          "suggestion": {
            "type": "string"
          }
        }
      }
    },
    "verification": {
      "type": "object",
      "additionalProperties": false,
      "description": "Computational verification under CVP. Review-policy tiers live on `review`, not here.",
      "required": [
        "cvp"
      ],
      "properties": {
        "cvp": {
          "type": "object",
          "additionalProperties": false,
          "required": [
            "status",
            "protocol",
            "profile",
            "verified_scope",
            "verification_revision",
            "evidence_digest"
          ],
          "properties": {
            "status": {
              "type": "string",
              "description": "CVP verification status (e.g. VERIFIED)"
            },
            "protocol": {
              "type": "string",
              "description": "CVP protocol id, e.g. 1.0.0-proposed"
            },
            "profile": {
              "type": "string"
            },
            "verified_scope": {
              "type": "string"
            },
            "verification_revision": {
              "type": [
                "string",
                "null"
              ]
            },
            "evidence_digest": {
              "type": [
                "string",
                "null"
              ]
            },
            "production": {
              "type": [
                "string",
                "null"
              ],
              "description": "Production freshness, e.g. CURRENT"
            },
            "evidence": {
              "type": "string",
              "format": "uri"
            }
          }
        }
      }
    },
    "review": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "tier",
        "engine_tested",
        "expert_reviewed",
        "source_checked",
        "reviewed_by",
        "reviewer_role",
        "last_reviewed"
      ],
      "properties": {
        "tier": {
          "type": "string",
          "enum": [
            "candidate",
            "engine_tested",
            "internally_reviewed",
            "expert_verified"
          ]
        },
        "engine_tested": {
          "type": "boolean"
        },
        "expert_reviewed": {
          "type": "boolean"
        },
        "internally_reviewed": {
          "type": "boolean"
        },
        "review_kind": {
          "type": [
            "string",
            "null"
          ]
        },
        "source_checked": {
          "type": "boolean"
        },
        "reviewed_by": {
          "type": [
            "string",
            "null"
          ]
        },
        "reviewer_role": {
          "type": [
            "string",
            "null"
          ]
        },
        "last_reviewed": {
          "type": [
            "string",
            "null"
          ]
        }
      },
      "allOf": [
        {
          "if": {
            "properties": {
              "tier": {
                "const": "expert_verified"
              }
            },
            "required": [
              "tier"
            ]
          },
          "then": {
            "properties": {
              "engine_tested": {
                "const": true
              },
              "expert_reviewed": {
                "const": true
              },
              "source_checked": {
                "const": true
              },
              "reviewed_by": {
                "type": "string",
                "minLength": 1
              },
              "reviewer_role": {
                "type": "string",
                "minLength": 1
              },
              "last_reviewed": {
                "type": "string",
                "minLength": 1
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "tier": {
                "const": "internally_reviewed"
              }
            },
            "required": [
              "tier"
            ]
          },
          "then": {
            "properties": {
              "engine_tested": {
                "const": true
              },
              "internally_reviewed": {
                "const": true
              },
              "source_checked": {
                "const": true
              }
            }
          }
        },
        {
          "if": {
            "properties": {
              "tier": {
                "const": "engine_tested"
              }
            },
            "required": [
              "tier"
            ]
          },
          "then": {
            "properties": {
              "engine_tested": {
                "const": true
              }
            }
          }
        }
      ]
    },
    "calculation_version": {
      "type": "string",
      "const": "1.1.1"
    },
    "api_version": {
      "type": "string"
    },
    "api_contract_version": {
      "type": "string"
    },
    "spec_version": {
      "type": "string"
    },
    "page": {
      "type": [
        "string",
        "null"
      ],
      "description": "Canonical calculator page URL"
    },
    "links": {
      "type": "object",
      "additionalProperties": false,
      "properties": {
        "schema_input": {
          "type": "string",
          "format": "uri"
        },
        "schema_output": {
          "type": "string",
          "format": "uri"
        },
        "evidence": {
          "type": "string",
          "format": "uri"
        },
        "openapi": {
          "type": "string",
          "format": "uri"
        },
        "capabilities": {
          "type": "string",
          "format": "uri"
        },
        "mcp": {
          "type": "string",
          "format": "uri"
        }
      }
    }
  }
}