{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://dpone.dev/schemas/schema-migration/bundle-diff.schema.json",
  "title": "dpone schema migration bundle diff",
  "type": "object",
  "required": [
    "schema_version",
    "diff_id",
    "status",
    "base_bundle_id",
    "head_bundle_id",
    "base_pack_id",
    "head_pack_id",
    "target",
    "summary",
    "changes",
    "blockers",
    "warnings",
    "recommendations"
  ],
  "additionalProperties": true,
  "properties": {
    "schema_version": {
      "const": "dpone.schema_migration_bundle_diff.v1"
    },
    "diff_id": {"type": "string", "pattern": "^sha256:[0-9a-f]{64}$"},
    "status": {"enum": ["same", "changed", "breaking", "blocked"]},
    "base_bundle_id": {"type": ["string", "null"]},
    "head_bundle_id": {"type": ["string", "null"]},
    "base_pack_id": {"type": ["string", "null"]},
    "head_pack_id": {"type": ["string", "null"]},
    "target": {"type": "object"},
    "summary": {
      "type": "object",
      "required": [
        "changes_count",
        "breaking_count",
        "approval_delta_count",
        "impact_delta_count",
        "gate_delta_count"
      ],
      "additionalProperties": true,
      "properties": {
        "changes_count": {"type": "integer", "minimum": 0},
        "breaking_count": {"type": "integer", "minimum": 0},
        "approval_delta_count": {"type": "integer", "minimum": 0},
        "impact_delta_count": {"type": "integer", "minimum": 0},
        "gate_delta_count": {"type": "integer", "minimum": 0}
      }
    },
    "changes": {
      "type": "array",
      "items": {
        "type": "object",
        "required": [
          "kind",
          "path",
          "classification",
          "severity",
          "risk_tags",
          "base",
          "head",
          "reviewer_action"
        ],
        "additionalProperties": true,
        "properties": {
          "kind": {
            "enum": [
              "migration_pack",
              "impact_plan",
              "approval",
              "environment_contract",
              "certification",
              "promotion",
              "gate",
              "bundle_metadata"
            ]
          },
          "path": {"type": "string"},
          "classification": {
            "enum": ["metadata", "evidence", "schema", "physical", "impact", "approval", "promotion", "policy"]
          },
          "severity": {"enum": ["info", "low", "medium", "high", "critical"]},
          "risk_tags": {"type": "array", "items": {"type": "string"}},
          "reviewer_action": {"type": "string"}
        }
      }
    },
    "blockers": {"type": "array", "items": {"type": "string"}},
    "warnings": {"type": "array", "items": {"type": "string"}},
    "recommendations": {"type": "array", "items": {"type": "string"}}
  }
}