{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://backup-tool.invalid/contracts/repository/v1/manifest.schema.json",
  "title": "Backup Tool Manifest v1",
  "type": "object",
  "additionalProperties": false,
  "required": [
    "format_version", "backup_id", "repository_id", "source_id", "job_id", "execution_id",
    "requested_mode", "effective_mode", "created_at", "source_consistency", "exclusion_policy",
    "entries", "aggregates", "encryption_key_id", "manifest_digest", "manifest_signature"
  ],
  "properties": {
    "format_version": {"const": 1},
    "backup_id": {"$ref": "#/$defs/uuidv7"},
    "repository_id": {"$ref": "#/$defs/uuidv7"},
    "source_id": {"$ref": "#/$defs/uuidv7"},
    "job_id": {"$ref": "#/$defs/uuidv7"},
    "execution_id": {"$ref": "#/$defs/uuidv7"},
    "requested_mode": {"enum": ["full", "incremental"]},
    "effective_mode": {"enum": ["full", "incremental"]},
    "created_at": {"type": "string", "format": "date-time", "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(?:\\.[0-9]+)?Z$"},
    "source_consistency": {
      "type": "object",
      "additionalProperties": false,
      "required": ["adapter", "captured_at", "evidence"],
      "properties": {
        "adapter": {"enum": ["local", "postgresql", "mysql"]},
        "captured_at": {"type": "string", "format": "date-time", "pattern": "^[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}:[0-9]{2}:[0-9]{2}(?:\\.[0-9]+)?Z$"},
        "evidence": {"type": "object"}
      }
    },
    "exclusion_policy": {
      "type": "object",
      "additionalProperties": false,
      "required": ["matcher", "version", "patterns"],
      "properties": {
        "matcher": {"const": "gitignore"},
        "version": {"type": "integer", "minimum": 1},
        "patterns": {"type": "array", "items": {"type": "string"}}
      }
    },
    "entries": {
      "type": "array",
      "items": {"$ref": "#/$defs/entry"}
    },
    "aggregates": {
      "type": "object",
      "additionalProperties": false,
      "required": ["entry_count", "logical_bytes", "stored_bytes"],
      "properties": {
        "entry_count": {"type": "integer", "minimum": 0},
        "logical_bytes": {"type": "integer", "minimum": 0},
        "stored_bytes": {"type": "integer", "minimum": 0}
      }
    },
    "encryption_key_id": {"type": ["string", "null"]},
    "manifest_digest": {"type": "string", "pattern": "^[0-9a-f]{64}$"},
    "manifest_signature": {
      "type": "object",
      "additionalProperties": false,
      "required": ["algorithm", "key_id", "value"],
      "properties": {
        "algorithm": {"const": "ed25519"},
        "key_id": {"type": "string", "minLength": 1},
        "value": {"type": "string", "pattern": "^[0-9a-f]{128}$"}
      }
    }
  },
  "$defs": {
    "uuidv7": {
      "type": "string",
      "format": "uuid",
      "pattern": "^[0-9a-f]{8}-[0-9a-f]{4}-7[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$"
    },
    "entry": {
      "type": "object",
      "additionalProperties": false,
      "required": ["path", "type", "size", "blob_digest", "mode", "mtime_ns", "link_target", "metadata_support"],
      "properties": {
        "path": {"type": "string", "minLength": 1, "pattern": "^(?!/)(?!.*(?:^|/)\\.\\.(?:/|$))(?!.*\\\\).+$"},
        "type": {"enum": ["file", "directory", "symlink"]},
        "size": {"type": "integer", "minimum": 0},
        "blob_digest": {"type": ["string", "null"], "pattern": "^[0-9a-f]{64}$"},
        "mode": {"type": ["integer", "null"], "minimum": 0},
        "mtime_ns": {"type": ["integer", "null"], "minimum": 0},
        "link_target": {"type": ["string", "null"]},
        "metadata_support": {"type": "array", "items": {"type": "string"}, "uniqueItems": true}
      },
      "allOf": [
        {
          "if": {"properties": {"type": {"const": "file"}}},
          "then": {
            "properties": {
              "blob_digest": {"type": "string", "pattern": "^[0-9a-f]{64}$"},
              "link_target": {"type": "null"}
            }
          }
        },
        {
          "if": {"properties": {"type": {"const": "directory"}}},
          "then": {
            "properties": {
              "blob_digest": {"type": "null"},
              "link_target": {"type": "null"},
              "size": {"const": 0}
            }
          }
        },
        {
          "if": {"properties": {"type": {"const": "symlink"}}},
          "then": {
            "properties": {
              "blob_digest": {"type": "null"},
              "link_target": {
                "type": "string",
                "minLength": 1,
                "pattern": "^(?!/)(?!.*(?:^|/)\\.\\.(?:/|$))(?!.*\\\\).+$"
              },
              "size": {"const": 0}
            }
          }
        }
      ]
    }
  }
}