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DungeonMaster AI - Agent Exceptions
Exception hierarchy for agent-related errors.
"""
from __future__ import annotations
class AgentError(Exception):
"""Base exception for all agent-related errors."""
def __init__(self, message: str, recoverable: bool = True) -> None:
super().__init__(message)
self.message = message
self.recoverable = recoverable
# =============================================================================
# LLM Provider Exceptions
# =============================================================================
class LLMProviderError(AgentError):
"""Base exception for LLM provider errors."""
def __init__(
self,
message: str,
provider: str = "",
recoverable: bool = True,
) -> None:
super().__init__(message, recoverable)
self.provider = provider
class LLMRateLimitError(LLMProviderError):
"""LLM provider rate limit exceeded."""
def __init__(
self,
provider: str,
retry_after: float | None = None,
) -> None:
super().__init__(
f"Rate limit exceeded for {provider}",
provider=provider,
recoverable=True,
)
self.retry_after = retry_after
class LLMTimeoutError(LLMProviderError):
"""LLM request timed out."""
def __init__(
self,
provider: str,
timeout_seconds: float,
) -> None:
super().__init__(
f"Request to {provider} timed out after {timeout_seconds}s",
provider=provider,
recoverable=True,
)
self.timeout_seconds = timeout_seconds
class LLMAuthenticationError(LLMProviderError):
"""LLM authentication failed (invalid API key)."""
def __init__(self, provider: str) -> None:
super().__init__(
f"Authentication failed for {provider}. Check API key.",
provider=provider,
recoverable=False,
)
class LLMQuotaExhaustedError(LLMProviderError):
"""LLM quota/credits exhausted."""
def __init__(self, provider: str) -> None:
super().__init__(
f"Quota exhausted for {provider}",
provider=provider,
recoverable=False,
)
class LLMAllProvidersFailedError(AgentError):
"""All LLM providers failed."""
def __init__(self, errors: dict[str, str]) -> None:
providers = ", ".join(errors.keys())
super().__init__(
f"All LLM providers failed: {providers}",
recoverable=False,
)
self.errors = errors
class LLMCircuitBreakerOpenError(LLMProviderError):
"""Circuit breaker is open for this provider."""
def __init__(
self,
provider: str,
reset_after: float | None = None,
) -> None:
super().__init__(
f"Circuit breaker open for {provider}",
provider=provider,
recoverable=True,
)
self.reset_after = reset_after
# =============================================================================
# Agent Processing Exceptions
# =============================================================================
class AgentProcessingError(AgentError):
"""Error during agent processing."""
def __init__(
self,
message: str,
agent_name: str = "",
recoverable: bool = True,
) -> None:
super().__init__(message, recoverable)
self.agent_name = agent_name
class DMAgentError(AgentProcessingError):
"""Error in Dungeon Master agent."""
def __init__(self, message: str, recoverable: bool = True) -> None:
super().__init__(message, agent_name="DungeonMaster", recoverable=recoverable)
class RulesAgentError(AgentProcessingError):
"""Error in Rules Arbiter agent."""
def __init__(self, message: str, recoverable: bool = True) -> None:
super().__init__(message, agent_name="RulesArbiter", recoverable=recoverable)
class VoiceNarratorError(AgentProcessingError):
"""Error in Voice Narrator agent."""
def __init__(self, message: str, recoverable: bool = True) -> None:
super().__init__(message, agent_name="VoiceNarrator", recoverable=recoverable)
# =============================================================================
# Tool Execution Exceptions
# =============================================================================
class ToolExecutionError(AgentError):
"""Error executing a tool."""
def __init__(
self,
tool_name: str,
message: str,
original_error: Exception | None = None,
recoverable: bool = True,
) -> None:
super().__init__(
f"Tool '{tool_name}' failed: {message}",
recoverable=recoverable,
)
self.tool_name = tool_name
self.original_error = original_error
class ToolTimeoutError(ToolExecutionError):
"""Tool execution timed out."""
def __init__(
self,
tool_name: str,
timeout_seconds: float,
) -> None:
super().__init__(
tool_name,
f"Execution timed out after {timeout_seconds}s",
recoverable=True,
)
self.timeout_seconds = timeout_seconds
class ToolNotFoundError(ToolExecutionError):
"""Requested tool not found."""
def __init__(self, tool_name: str) -> None:
super().__init__(
tool_name,
"Tool not found in available tools",
recoverable=False,
)
# =============================================================================
# Orchestration Exceptions
# =============================================================================
class OrchestratorError(AgentError):
"""Error in agent orchestration."""
pass
class OrchestratorNotInitializedError(OrchestratorError):
"""Orchestrator not properly initialized."""
def __init__(self) -> None:
super().__init__(
"Orchestrator not initialized. Call setup() first.",
recoverable=True,
)
class TurnProcessingError(OrchestratorError):
"""Error processing a player turn."""
def __init__(
self,
message: str,
partial_result: object | None = None,
) -> None:
super().__init__(message, recoverable=True)
self.partial_result = partial_result
# =============================================================================
# State Exceptions
# =============================================================================
class GameStateError(AgentError):
"""Error with game state."""
pass
class StateConsistencyError(GameStateError):
"""Game state became inconsistent."""
def __init__(
self,
message: str,
state_snapshot: dict[str, object] | None = None,
) -> None:
super().__init__(message, recoverable=True)
self.state_snapshot = state_snapshot
# =============================================================================
# Graceful Error Messages
# =============================================================================
GRACEFUL_ERROR_MESSAGES: dict[str, str] = {
"llm_timeout": (
"The magical winds of computation blow slowly today. "
"Please try again in a moment."
),
"llm_rate_limit": (
"The ethereal realm is experiencing heavy traffic. "
"Take a breath and try again shortly."
),
"llm_all_failed": (
"The arcane servers are temporarily unreachable. "
"Your adventure continues in text mode."
),
"tool_failed": (
"The mystical tools encountered interference. "
"Let's try a different approach..."
),
"voice_unavailable": (
"The voice of the narrator is temporarily silenced. "
"Continuing with text narration."
),
"mcp_unavailable": (
"The game mechanics server is resting. "
"Using simplified rules for now."
),
"general_error": (
"An unexpected twist in the fabric of reality occurred. "
"The adventure continues nonetheless."
),
}
def get_graceful_message(error_type: str) -> str:
"""
Get a user-friendly error message.
Args:
error_type: Type of error (key in GRACEFUL_ERROR_MESSAGES)
Returns:
User-friendly error message
"""
return GRACEFUL_ERROR_MESSAGES.get(
error_type,
GRACEFUL_ERROR_MESSAGES["general_error"],
)
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