{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:orbiplex:schema:membership-sponsorship:v1",
  "title": "MembershipSponsorship v1",
  "description": "Append-only scoped sponsorship fact. Sponsorship grants candidacy to named surfaces and creates bounded, evidence-backed sponsor exposure; it does not directly grant authority.",
  "type": "object",
  "additionalProperties": false,
  "x-dia-workflow": "project",
  "x-dia-status": "draft",
  "x-dia-basis": [
    "P051",
    "DIA-MS-001"
  ],
  "required": [
    "schema/v",
    "sponsorship/id",
    "sponsor/subject",
    "invitee/subject",
    "scopes",
    "sponsorship/template",
    "issued/at",
    "expires/at",
    "probation/until",
    "due-diligence/refs",
    "revocable",
    "revocation-tail-duration",
    "evidence/policy"
  ],
  "properties": {
    "schema/v": {
      "const": 1
    },
    "sponsorship/id": {
      "type": "string",
      "pattern": "^membership-sponsorship:[A-Za-z0-9._:-]+$"
    },
    "sponsor/subject": {
      "$ref": "_shared/membership-enums.v1.schema.json#/$defs/subject"
    },
    "invitee/subject": {
      "$ref": "_shared/membership-enums.v1.schema.json#/$defs/subject"
    },
    "scopes": {
      "$ref": "_shared/membership-enums.v1.schema.json#/$defs/scopes"
    },
    "sponsorship/template": {
      "$ref": "_shared/membership-enums.v1.schema.json#/$defs/sponsorship_template"
    },
    "liability/class": {
      "$ref": "_shared/membership-enums.v1.schema.json#/$defs/sponsor_liability_class"
    },
    "issued/at": {
      "type": "string",
      "format": "date-time"
    },
    "expires/at": {
      "type": "string",
      "format": "date-time"
    },
    "probation/until": {
      "type": "string",
      "format": "date-time"
    },
    "due-diligence/refs": {
      "type": "array",
      "minItems": 1,
      "uniqueItems": true,
      "items": {
        "$ref": "#/$defs/due_diligence_ref"
      }
    },
    "revocable": {
      "type": "boolean"
    },
    "revoked/at": {
      "type": "string",
      "format": "date-time"
    },
    "revocation-tail-duration": {
      "$ref": "_shared/membership-enums.v1.schema.json#/$defs/iso8601_duration"
    },
    "evidence/policy": {
      "$ref": "_shared/membership-enums.v1.schema.json#/$defs/evidence_policy"
    },
    "policy/ref": {
      "type": "string",
      "minLength": 1
    },
    "notes": {
      "type": "string"
    },
    "extensions": {
      "$ref": "_shared/membership-enums.v1.schema.json#/$defs/extensions"
    }
  },
  "$defs": {
    "due_diligence_ref": {
      "type": "object",
      "additionalProperties": false,
      "required": [
        "kind"
      ],
      "properties": {
        "kind": {
          "$ref": "_shared/membership-enums.v1.schema.json#/$defs/due_diligence_kind"
        },
        "evidence/ref": {
          "type": "string",
          "minLength": 1
        }
      },
      "allOf": [
        {
          "if": {
            "properties": {
              "kind": {
                "const": "other-documented"
              }
            },
            "required": [
              "kind"
            ]
          },
          "then": {
            "required": [
              "evidence/ref"
            ]
          }
        }
      ]
    }
  }
}