/**
 * Error codes carried by delegated agent (`subagent-result`) failures.
 *
 * Every producer that mints a code imports from this module, so the set
 * stays closed. Codes are diagnostic only: child lifecycle is owned by the
 * agent handle store and is never inferred from an error code.
 */
/** Error code for an agent id invoked through the wrong subagent tool. */
export declare const AGENT_MISMATCH = "AGENT_MISMATCH";
/** Error code for a registered agent that cannot be reached. */
export declare const AGENT_UNREACHABLE = "AGENT_UNREACHABLE";
/** Error code for an agent that is starting or already running a turn. */
export declare const AGENT_BUSY = "AGENT_BUSY";
/** Describes the owner blocking a continuation without exposing workflow run ids. */
export declare function formatAgentBusyMessage(input: {
    readonly agentId: string;
    readonly agentName: string;
    readonly ownerId?: string;
}): string;
/** Error code for a local subagent that failed to start. */
export declare const SUBAGENT_START_FAILED = "SUBAGENT_START_FAILED";
/** Error code for a delegated subagent whose execution threw. */
export declare const SUBAGENT_EXECUTION_FAILED = "SUBAGENT_EXECUTION_FAILED";
/** Error code for a remote agent session that failed to start. */
export declare const REMOTE_AGENT_START_FAILED = "REMOTE_AGENT_START_FAILED";
/** Fallback error code for a remote `session.failed` callback without error detail. */
export declare const REMOTE_AGENT_FAILED = "REMOTE_AGENT_FAILED";
/** Error code a child session reports back when the whole session failed. */
export declare const SESSION_FAILED = "SESSION_FAILED";