{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://prismagram.com/published-language/envelope/1.0/assertion.schema.json",
  "title": "Assertion Envelope v1.2",
  "description": "Producer contract for envelope v1.1 messages (SPEC.md §4). One cross-field rule cannot be expressed here and is enforced by the conformance runner: `jurisdiction` MUST equal the prefix of `id`.",
  "type": "object",
  "required": [
    "envelope",
    "id",
    "class",
    "subject",
    "statement",
    "evidence",
    "provenance",
    "confidence",
    "endorsement",
    "jurisdiction",
    "at",
    "lifecycle",
    "relations",
    "deadline",
    "falsification"
  ],
  "properties": {
    "envelope": {
      "enum": [
        "0.1",
        "1.0",
        "1.1",
        "1.2"
      ],
      "description": "Version of the contract. v1.0 is substantively identical to v0.1 (SPEC §8): both values validate. v1.1 adds the optional declared reading (§4.1); v1.2 adds the relation kind `confirms` (§4.2). A message that does not declare its version is not versioned (A1 §3)."
    },
    "id": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9]{2,31}/[A-Za-z0-9][A-Za-z0-9._-]{0,127}$",
      "description": "Prefixed identity: <jurisdiction>/<local-id>. Never rewritten in transit."
    },
    "class": {
      "enum": [
        "invariant",
        "step_realized",
        "transition",
        "traversal",
        "stressor",
        "decision",
        "constraint",
        "measure",
        "conflict",
        "hypothesis"
      ]
    },
    "subject": {
      "type": "string",
      "minLength": 1
    },
    "statement": {
      "type": "string"
    },
    "evidence": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "kind",
          "ref"
        ],
        "properties": {
          "kind": {
            "type": "string",
            "minLength": 1
          },
          "ref": {
            "type": "string",
            "minLength": 1
          }
        },
        "additionalProperties": false
      }
    },
    "provenance": {
      "type": "string",
      "pattern": "^(human|inferred|measured|imported|agent:[A-Za-z0-9][A-Za-z0-9._-]*)$",
      "description": "Axes never mix: inferred is a provenance, never a class."
    },
    "confidence": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "Transported verbatim. Decay and thresholds are consumer-local readings."
    },
    "endorsement": {
      "oneOf": [
        {
          "type": "null"
        },
        {
          "type": "object",
          "required": [
            "by",
            "at",
            "rite"
          ],
          "properties": {
            "by": {
              "type": "string",
              "minLength": 1
            },
            "at": {
              "type": "string",
              "format": "date-time"
            },
            "rite": {
              "enum": [
                "pr_approval",
                "ui",
                "batch"
              ]
            }
          },
          "additionalProperties": false
        }
      ],
      "description": "null means no human endorsed this — a fact, not a defect."
    },
    "jurisdiction": {
      "type": "string",
      "pattern": "^[a-z][a-z0-9]{2,31}$"
    },
    "at": {
      "type": "string",
      "format": "date-time"
    },
    "lifecycle": {
      "enum": [
        "proposed",
        "endorsed",
        "superseded",
        "rejected",
        "under_revision"
      ],
      "description": "What the origin declares about its own assertion. Not an approval: the proven event lives in `endorsement` (ADR-070 §3.2)."
    },
    "relations": {
      "type": "object",
      "properties": {
        "amends": {
          "$ref": "#/$defs/idList"
        },
        "supersedes": {
          "$ref": "#/$defs/idList"
        },
        "depends_on": {
          "$ref": "#/$defs/idList"
        },
        "satellite_of": {
          "$ref": "#/$defs/idList"
        },
        "confirms": {
          "$ref": "#/$defs/idList",
          "description": "v1.2, §4.2. Carried by a `measure` of provenance `measured` only: the ids it examined. The measure points at what it confirms; the confirmed assertion is never edited to point back."
        }
      },
      "additionalProperties": false
    },
    "deadline": {
      "oneOf": [
        {
          "type": "null"
        },
        {
          "type": "string",
          "format": "date-time"
        }
      ]
    },
    "falsification": {
      "oneOf": [
        {
          "type": "null"
        },
        {
          "type": "string",
          "minLength": 1
        }
      ]
    },
    "confidence_reading": {
      "type": "object",
      "description": "OPTIONAL (SPEC §4.1, v1.1). Present only when the sender exposes a value it derived from `confidence`. A derived value shown without this object is not conformant: nobody could reproduce it.",
      "required": [
        "policy",
        "version",
        "value",
        "as_of"
      ],
      "additionalProperties": false,
      "properties": {
        "policy": {
          "type": "string",
          "minLength": 1,
          "description": "Name of the reading applied — not the value it produced."
        },
        "version": {
          "type": "string",
          "minLength": 1,
          "description": "Version of that reading. Two auditors on two dates must be able to tell whether they read alike."
        },
        "value": {
          "type": "number",
          "minimum": 0,
          "maximum": 1,
          "description": "The derived value. The verbatim one stays in `confidence`, untouched."
        },
        "as_of": {
          "type": "string",
          "format": "date-time",
          "description": "When the reading was taken. A decay without a date is not reproducible."
        }
      }
    }
  },
  "patternProperties": {
    "^x_[a-z][a-z0-9]{2,31}_[a-z0-9_]+$": {
      "description": "Jurisdiction extension (SPEC.md §7). Preserved on relay, may be ignored."
    }
  },
  "additionalProperties": false,
  "$defs": {
    "idList": {
      "type": "array",
      "items": {
        "type": "string",
        "pattern": "^[a-z][a-z0-9]{2,31}/[A-Za-z0-9][A-Za-z0-9._-]{0,127}$"
      }
    }
  }
}