"""Domain-neutral Agent command protocol errors."""


class AgentCommandError(Exception):
    """Base Agent command protocol error."""


class AgentCommandNotFound(AgentCommandError):
    """The submitted command identifier is unknown."""


class AgentCommandConflict(AgentCommandError):
    """The queue row cannot accept the requested transition."""


class AgentResultValidationError(AgentCommandError):
    """The Agent result does not match its command contract."""