proposal-system/api/src/ProposalSystem.Application/Common/BusinessRuleException.cs

namespace ProposalSystem.Application.Common;

/// <summary>
/// Business-rule violation carrying a machine-readable code, surfaced as
/// 422 ProblemDetails with a top-level "code" extension (SHOC error-code
/// vocabulary convention — e.g. "CancelNotAllowed"). Clients branch on the
/// code, never on the human-readable message.
/// </summary>
public class BusinessRuleException : Exception
{
    public string Code { get; }

    public BusinessRuleException(string code, string message) : base(message)
    {
        Code = code;
    }
}