Matrix explorer

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A shop matrix over two object kinds. Load it, change a rule, and watch the decisions move. Or paste your own into the box on the left.

{
  "version": "shop@12",
  "maxStale": 900000,
  "schema": {
    "subject": {
      "fields": {
        "id": "string",
        "roles": "string[]"
      }
    },
    "objects": {
      "listing": {
        "fields": {
          "id": "string",
          "sellerId": "string",
          "status": "string",
          "title": "string",
          "price": "number"
        }
      },
      "order": {
        "fields": {
          "id": "string",
          "buyerId": "string",
          "placedAt": "instant"
        }
      }
    }
  },
  "permissions": [
    {
      "key": "listing.read",
      "object": "listing",
      "action": "read",
      "visibility": "public",
      "rules": [
        {
          "id": "anyone",
          "when": []
        }
      ]
    },
    {
      "key": "listing.update",
      "object": "listing",
      "action": "update",
      "visibility": "public",
      "rules": [
        {
          "id": "seller",
          "when": [
            {
              "field": "object.sellerId",
              "op": "eq",
              "path": "subject.id"
            }
          ]
        }
      ],
      "denyRules": [
        {
          "id": "archived",
          "when": [
            {
              "field": "object.status",
              "op": "eq",
              "value": "archived"
            }
          ]
        }
      ],
      "fields": {
        "fields": [
          "*",
          "!sellerId"
        ]
      }
    },
    {
      "key": "order.refund",
      "object": "order",
      "action": "refund",
      "rules": [
        {
          "id": "support",
          "when": [
            {
              "field": "subject.roles",
              "op": "contains",
              "value": "support"
            }
          ]
        }
      ]
    }
  ]
}