• Explored repository structure and understood current validation system
• Identified the issue: Package.RegistryType, Package.Identifier, and Package.Version should be required but are not validated as non-empty in Go code
• Found that JSON schema already has the correct requirements, but Go validation is missing
• Located the validation function validatePackageField in internal/validators/validators.go that needs modification
• Add validation for empty RegistryType field in validatePackageField function
• Add validation for empty Identifier field in validatePackageField function
• Add validation for empty Version field in validatePackageField function
• Define appropriate error constants for the new validation errors
• Add test cases to verify empty field validation works correctly
• Run existing tests to ensure no regressions

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