{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "urn:orbiplex:schema:relationship-membership-fact:v1",
  "title": "RelationshipMembershipFact v1",
  "description": "Append-only local fact recording a relationship membership state transition in one owner's private relationship space.",
  "type": "object",
  "additionalProperties": true,
  "x-dia-workflow": "project",
  "x-dia-status": "draft",
  "x-dia-basis": [
    "doc/project/40-proposals/065-local-relationship-layer.md",
    "doc/project/60-solutions/032-local-relationship-layer/032-local-relationship-layer.md"
  ],
  "required": [
    "schema",
    "schema/v",
    "fact/id",
    "owner/ref",
    "contact/ref",
    "class/id",
    "status",
    "actor/ref",
    "event/at",
    "tx/id"
  ],
  "properties": {
    "schema": { "const": "relationship-membership-fact.v1" },
    "schema/v": { "const": 1 },
    "fact/id": { "type": "string", "pattern": "^fact:relationship-membership:[a-z0-9][a-z0-9:-]*$" },
    "owner/ref": { "type": "string", "minLength": 1, "maxLength": 256 },
    "contact/ref": { "type": "string", "pattern": "^(local-contact:[A-Za-z0-9_-]+|node:\\S+|participant:\\S+|routing:\\S+)$" },
    "class/id": { "$ref": "relationship-class.v1.schema.json#/$defs/class_id" },
    "status": { "$ref": "#/$defs/membership_status" },
    "actor/ref": { "type": "string", "minLength": 1, "maxLength": 256 },
    "event/at": { "type": "string", "format": "date-time" },
    "tx/id": { "type": "string", "minLength": 1, "maxLength": 160 },
    "supersedes/fact-id": { "type": "string", "pattern": "^fact:relationship-membership:[a-z0-9][a-z0-9:-]*$" },
    "reason/code": { "type": "string", "minLength": 1, "maxLength": 120 },
    "reason/note": { "type": "string", "minLength": 1, "maxLength": 2000 },
    "context/ref": { "type": "string", "minLength": 1, "maxLength": 256 }
  },
  "$defs": {
    "membership_status": {
      "type": "string",
      "enum": ["active", "pending-outgoing", "pending-incoming", "blocked", "revoked"]
    }
  }
}