app/common/exceptions.py

"""Custom exceptions."""

from __future__ import annotations


class PolyGuardError(Exception):
    """Base exception for project errors."""


class InvalidActionError(PolyGuardError):
    """Raised when an action is malformed or disallowed."""


class SafetyVetoError(PolyGuardError):
    """Raised when safety governance rejects an action."""


class ParserError(PolyGuardError):
    """Raised when structured policy output cannot be parsed."""