{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Syncpoint Backup Metadata",
  "description": "Metadata stored inside backup archives as _metadata.json",
  "type": "object",
  "required": [
    "version",
    "toolVersion",
    "createdAt",
    "hostname",
    "system",
    "config",
    "files",
    "summary"
  ],
  "properties": {
    "version": {
      "type": "string",
      "description": "Metadata schema version."
    },
    "toolVersion": {
      "type": "string",
      "description": "Syncpoint tool version used to create the backup."
    },
    "createdAt": {
      "type": "string",
      "description": "ISO 8601 timestamp of backup creation."
    },
    "hostname": {
      "type": "string",
      "description": "Hostname of the machine where the backup was created."
    },
    "system": {
      "type": "object",
      "description": "System information at backup time.",
      "required": ["platform", "release", "arch"],
      "properties": {
        "platform": {
          "type": "string",
          "description": "Operating system platform (e.g. darwin, linux)."
        },
        "release": {
          "type": "string",
          "description": "OS kernel release version."
        },
        "arch": {
          "type": "string",
          "description": "CPU architecture (e.g. arm64, x64)."
        }
      },
      "additionalProperties": false
    },
    "config": {
      "type": "object",
      "description": "Backup configuration snapshot.",
      "required": ["filename"],
      "properties": {
        "filename": {
          "type": "string",
          "description": "Filename pattern used for the backup."
        },
        "destination": {
          "type": "string",
          "description": "Custom destination path, if configured."
        }
      },
      "additionalProperties": false
    },
    "files": {
      "type": "array",
      "description": "List of files included in the backup.",
      "items": {
        "type": "object",
        "required": ["path", "absolutePath", "size", "hash"],
        "properties": {
          "path": {
            "type": "string",
            "description": "Display path (e.g. ~/.zshrc)."
          },
          "absolutePath": {
            "type": "string",
            "description": "Full filesystem path."
          },
          "size": {
            "type": "number",
            "description": "File size in bytes.",
            "minimum": 0
          },
          "hash": {
            "type": "string",
            "description": "SHA-256 hash of file contents."
          },
          "type": {
            "type": "string",
            "description": "File type (e.g. symlink, directory)."
          }
        },
        "additionalProperties": false
      }
    },
    "summary": {
      "type": "object",
      "description": "Backup summary statistics.",
      "required": ["fileCount", "totalSize"],
      "properties": {
        "fileCount": {
          "type": "integer",
          "description": "Total number of files in the backup.",
          "minimum": 0
        },
        "totalSize": {
          "type": "number",
          "description": "Total size of all files in bytes.",
          "minimum": 0
        }
      },
      "additionalProperties": false
    }
  },
  "additionalProperties": false
}