Failed to instantiate an adapter for a provider.
A general error occurred during the agent's process method.
A connection is already established.
Timeout waiting for an available instance of an API provider.
General configuration-related error.
A CORS browser extension is required to proceed.
CORS permissions are required but have not been granted.
An A2A (Agent-to-Agent) task delegation failed.
A task with the same ID already exists.
An error occurred with an external service.
A health check for a service failed.
An HTTP error occurred.
Invalid or malformed configuration provided.
The request was invalid or malformed.
An error occurred while communicating with the LLM provider.
The requested local LLM instance is currently busy.
Attempted to activate a local provider when another is already active.
A required API key was not provided.
A required configuration is missing.
A network error occurred.
The provided URL is not an HTTP/HTTPS URL.
Standard input is not available.
No active connection is available.
The requested feature is not implemented.
Failed to parse the output from the LLM.
The planning phase of the agent failed.
Error during prompt template rendering or initial structure creation.
The requested prompt fragment does not exist.
Failed to generate a prompt.
Failed to translate the ART standard prompt to a provider-specific format.
The constructed prompt object failed schema validation.
A generic error occurred in a repository.
The request timed out.
Failed to save data to the storage layer.
The requested server was not found.
A generic error occurred in the storage layer.
The synthesis phase of the agent failed.
The requested task was not found.
The requested thread could not be found in storage.
An operation timed out (duplicate of TIMEOUT_ERROR).
An operation timed out.
The requested tool is disabled for the current thread.
Failed to discover tools from a remote source.
A generic error occurred during tool execution.
An error occurred within the ToolSystem execution loop.
The requested tool could not be found in the registry.
The provided tool schema failed validation.
An unknown or unexpected error occurred.
The requested LLM provider is not known or configured.
The requested transport protocol is not supported.
Input data failed validation.
Defines standard error codes for the ART framework. These codes categorize errors originating from different subsystems.